RECEIVING BOX FOR A HEAT EXCHANGER

Abstract

The present invention relates to a receiving box (2) for a heat exchanger (1) for receiving and fluidically supplying tube bodies (3) of the heat exchanger (1), wherein the receiving box (2) has a box body (9), which limits at least one duct (12), which is fluidically connected to receptacles (11), in which the tube bodies (3) are received. A simplified production and/or an increased mechanical stability of the receiving box (2) are/is attained in that the box body (9) forms an injection tube (17), which is separated from the duct (12) and which is fluidically connected to at least one of the at least one ducts (12) via an outlet opening (18).

The invention further relates to a heat exchanger (1) comprising such a receiving box (2).

Claims

1. A receiving box for a heat exchanger, comprising: a box body delimiting at least one duct; the box body including a plurality of receptacles configured to receive a plurality of tube bodies of the heat exchanger, the plurality of tube bodies each fluidically connected to the at least one duct; wherein the box body defines an injection tube that extends along the at least one duct and is separated from the at least one duct via the box body; and wherein the injection tube includes at least one outlet opening fluidically connected to the at least one duct.

2. The receiving box according to claim 1, wherein: the at least one duct includes a plurality of ducts; the box body further includes an outer wall that delimits a first duct of the plurality of ducts and a second duct of the plurality of ducts in the box body on an outer side; the box body further includes a central web that delimits the first duct and the second duct in the box body, and which separates the first duct from the second duct; the plurality of receptacles includes a plurality of first receptacles disposed in the outer wall of the box body, the plurality of first receptacles fluidically connected to the first duct and configured to receive a plurality of first tube bodies of the plurality of tube bodies; the plurality of receptacles further includes a plurality of second receptacles disposed in the outer wall of the box body, the plurality of second receptacles fluidically connected to the second duct and configured to receive a plurality of second tube bodies of the plurality of tube bodies; and the central web is structured to form the injection duct.

3. The receiving box according to claim 1, wherein the at least one outlet opening extends into the at least one duct.

4. The receiving box according to claim 1, wherein at least a portion of the box body is double-walled in an area of the injection tube, and wherein at least one wall of the double-walled portion of the box body is structured to form the injection tube.

5. The receiving box according to claim 2, wherein: the central web is double-walled including a first wall and a second wall; the first wall of the central web delimits the first duct in the box body; and the second wall of the central web delimits the second duct in the box body.

6. The receiving box according to claim 1, wherein a through flow cross section of the injection tube is smaller than a through flow cross section of the at least one duct.

7. The receiving box according to claim 1, wherein an opening flow area via which the at least one outlet opening is connected to the at least one duct is disposed at an angle of 30 to 170 relative to a receptacle flow area of at least one receptacle of the plurality of receptacles that extends into the at least one duct.

8. The receiving box according to claim 1, wherein the box body further includes a connection opening for fluidically supplying the receiving box, and wherein the injection tube further includes an inlet opening disposed on an end side of the injection tube and fluidically connected to the connection opening.

9. The receiving box according to claim 8, wherein the at least one duct is fluidically connected to the connection opening via the at least one outlet opening.

10. The receiving box according to claim 1, wherein the at least one outlet opening includes at least two outlet openings that are disposed spaced apart from one another along the injection tube.

11. The receiving box according to claim 1, wherein the box body is composed of a cohesive material.

12. A heat exchanger, comprising: a plurality of tube bodies through which a first flow path for a first fluid extends; the plurality of tube bodies arranged in a second flow path for a second fluid, the second fluid path fluidically separated from the first flow path; and a receiving box including a box body delimiting at least one duct; the box body including a plurality of receptacles configured to receive the plurality of tube bodies of the heat exchanger; the box body defining an injection tube that extends along the at least one duct and is separated from the at least one duct via the box body; the injection tube including at least one outlet opening fluidically connected to the at least one duct; wherein the plurality of tube bodies are received in the plurality of receptacles and are each fluidically connected to the at least one duct; and wherein the first flow path extends through the receiving box.

13. The heat exchanger according to claim 12, wherein the box body further includes a connection opening for fluidically supplying the receiving box, and wherein the injection tube further includes an inlet opening disposed on an end side of the injection tube and fluidically connected to the connection opening.

14. The heat exchanger according to claim 12, wherein the box body is composed of a sheet metal.

15. A receiving box for a heat exchanger, comprising: a box body delimiting a plurality of ducts; the box body including a plurality of receptacles configured to receive a plurality of tube bodies of the heat exchanger, the plurality of tube bodies each fluidically connected to an associated duct of the plurality of ducts; wherein the box body defines an injection tube that extends along at least one duct of the plurality of ducts and is separated from the at least one duct via the box body; and wherein the injection tube includes a plurality of outlet openings that are each fluidically connected to a respective duct of the plurality of ducts.

16. The receiving box according to claim 15, wherein the plurality of outlet openings respectively extend into the respective duct.

17. The receiving box according to claim 15, wherein a through flow cross section of the injection tube is smaller than a through flow cross section of at least one duct of the plurality of ducts.

18. The receiving box according to claim 15, wherein the plurality of outlet openings are disposed spaced apart from one another along the injection tube.

19. The receiving box according to claim 15, wherein an opening flow area via which at least one of the plurality of outlet openings is connected to the respective duct is disposed at an angle of 30 to 170 relative to a receptacle flow area of at least one receptacle of the plurality of receptacles that extends into the respective duct.

20. The receiving box according to claim 15, wherein: the box body further includes a double-walled central web including a first wall and a second wall; the central web delimits and fluidically separates at least two ducts of the plurality of ducts, and is structured to form the injection duct; and the central web is structure and arranged such that the first wall delimits a first duct of the plurality of ducts and the second wall delimits a second duct of the plurality of ducts.

Description

[0042] Preferred exemplary embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components.

[0043] In each case schematically:

[0044] FIG. 1 shows an isometric view of a heat exchanger comprising a receiving box,

[0045] FIG. 2 shows a longitudinal section through the receiving box,

[0046] FIG. 3 shows an isometric view of the receiving box,

[0047] FIG. 4 shows another isometric view of the receiving box,

[0048] FIG. 5 shows a cross section through the receiving box,

[0049] FIG. 6 shows another cross section through the receiving box,

[0050] FIG. 7 shows a cross section through the receiving box in the case of different exemplary embodiments,

[0051] FIG. 8 shows an isometric view of the receiving box in the case of another exemplary embodiment,

[0052] FIG. 9 shows a longitudinal section through the receiving box from FIG. 8,

[0053] FIG. 10 shows a longitudinal section through the receiving box in the case of another exemplary embodiment,

[0054] FIG. 11 shows a longitudinal section through the receiving box in the case of a further exemplary embodiment,

[0055] FIG. 12 shows a cross section through the receiving box in the case of another exemplary embodiment,

[0056] FIG. 13 shows a cross section through the receiving box in the case of a further exemplary embodiment.

[0057] A heat exchanger 1, as it is shown, for example, in FIG. 1, has at least one receiving box 2, in which tube bodies 3 of the heat exchanger 1 are received and are supplied via the receiving box 2 with a first fluid, the flow path 4 of which, hereinafter also referred to as first flow path 4, leads through the receiving box 2 and the tube bodies 3. The tube bodies 3 are arranged in a flow path 5 of a second fluid, hereinafter also referred to as second flow path 5, wherein the first flow path 4 is fluidically separated from the second flow path 5. A heat exchange between the first fluid and the second fluid thereby occurs during operation of the heat exchanger 1. Corrugated fins 6, which enlarge the heat-transferring surface in the second flow path 5, can be arranged between the tube bodies 3. In the case of the example shown in FIG. 1, the heat exchanger 1 has first tube bodies 3 and second tube bodies 3 (see FIG. 7), wherein the second tube bodies 3 are not visible in the view shown in FIG. 1. A first supply duct 7 thereby supplies the heat exchanger 1 with the first fluid, which is discharged from the heat exchanger 1 via a second supply duct 8. In the case of the example shown in FIG. 1, both supply ducts 7, 8 are fluidically connected to the shown receiving box 2, so that the supply and the discharge of the first fluid occurs via the receiving box 2.

[0058] The receiving box 2 has a box body 9. The box body 9 has an outer wall 10, which is provided with receptacles 11 for the tube bodies 3, wherein an associated tube body 3 is received in the respective receptacle 11. The outer wall 10 limits two ducts 12 running through the box body 9, namely a first duct 12 and a second duct 12, on the outer side. The ducts 12 extend in a longitudinal direction 13 and are arranged adjacently in a transverse direction 14, which runs transversely to the longitudinal direction 13. In the outer wall 10, first receptacles 11 are provided for the first tube bodies 3, which are fluidically connected to the first duct 12 in such a way that the first tube bodies 3 received in the first receptacles 11 are fluidically connected to the first duct 12. The outer wall 10 is further provided with second receptacles 11 (see, for example, FIG. 4), which are not visible in FIG. 1 and which receive the second tube bodies 3 and which are fluidically connected to the second duct 12 in such a way that the second tube bodies 3 are fluidically connected to the second duct 12. It is assumed in FIG. 1 that the first fluid flows via the first duct 12 into the first tube bodies 3 and subsequently flows via the second tube bodies 3 into the second duct 12. The first fluid then flows out of the second duct 12 to the second supply duct 8. For this purpose, the heat exchanger 1 advantageously has a fluidic connection, which is not shown in FIG. 1, in particular located opposite the receiving box 2, between the first tube bodies 3 and the second tube bodies 3.

[0059] Different views of the receiving box 2 are shown in FIGS. 2 to 6, wherein FIG. 2 shows a longitudinal section through the receiving box 2 in the area of the first duct 12, while FIGS. 3 and 4 show different isometric views of the receiving box 2. FIGS. 5 and 6 show different cross sections through the receiving box 2.

[0060] The receiving box 2 has a central web 15, which is arranged inside the receiving box 2 and in the transverse direction 14 between the ducts 12. The central web 15 separates the first duct 12 from the second duct 12 inside the box body 9. The central web 15 is thereby embodied to be double-walled, thus has two walls 16, namely a first wall 16 and a second wall 16. The central web 15 forms an injection tube 17, through which the first flow path 4 of the first fluid leads. The injection tube 17 thereby has at least one outlet opening 18, which is fluidically connected to at least one of the ducts 12, so that a fluidic connection is established between the injection tube 17 and the associated duct 12 via the at least one outlet opening 18. In the case of the example shown in FIGS. 1 to 6, the injection tube 17 has a plurality of such outlet openings 18. FIG. 5 thereby shows a cross section through one of the outlet openings 18, and FIG. 6 shows a cross section outside of the outlet openings 18.

[0061] The injection tube 17 serves to introduce the first fluid into the first duct 12 in such a way that a pressure reduction and expansion of the first fluid occurs via the injection tube 17 and the outlet openings 18, before the first fluid flows into the tube bodies 3, here thus into the first tube bodies 3. The first flow path 4 thus leads through the outlet openings 18 into the first duct 12. The injection tube 17 extends along the ducts 12, 12 and thus in the longitudinal direction 13, wherein the outlet openings 18 are spaced apart from one another along the injection tube 17. In contrast, the injection tube 17 is separated from the second duct 12, thus does not have any outlet openings 18 for the second duct 12. As can in particular be gathered from FIGS. 3 to 6, the injection tube 17 in the shown examples is formed by a shaping of at least one of the walls 16, here by the shaping of both walls 16, of the central web 15, which are each shaped approximately semi-circularly into the respective adjacent duct 12, so that the injection duct 17 has an essentially round cross section, which can be flown through in the longitudinal direction 13.

[0062] To admit the first fluid into the injection tube 17, the injection tube 17 is provided at one end with an inlet opening 19, which is fluidically connected to the first supply duct 17. The fluidic connection is thereby realized in such a way that the first fluid only flows via the inlet opening 19 and subsequently via the at least one outlet opening 18 into the first duct 12. As is shown in particular by a comparison between FIGS. 3 and 4, the inlet opening 19 of the injection tube 17 is introduced exclusively into the first wall 16. The second wall 16 is thus free from openings and is shaped to form the injection tube 17. In the shown examples, an end wall 20, which closes the first duct 12, is additionally provided in the first flow path 4 downstream from the inlet opening 19 in the first duct 12 and upstream of the receptacle 11 of the first duct 12 most closely adjacent to the inlet opening 19. A further end wall 20, which is spaced apart from this end wall in the longitudinal direction 13, limits the duct 12 on the far side in the longitudinal direction 13. The respective end wall 20 is guided in an associated recess 23 of the box body 9, wherein one of the recesses can be seen in FIG. 4 and wherein the end wall 20 is not shown in FIG. 4 for this purpose.

[0063] It can be seen from FIGS. 2 and 5 that the outlet openings 18 can face away from the receptacles 11 of the associated duct 12. In the shown example, the outlet openings 18 thus face away from the first receptacles 11. An opening flow area 21 of the respective outlet opening 18, which is illustrated by means of dashes in FIG. 5, with which the outlet opening 18 leads into the first duct 12, is thereby at an angle of between 30 and 170 with a receiving flow area 22 of the respective first receptacle 11, which is suggested by means of dashes in FIG. 5, with which the receptacle 11 leads into the first duct 12.

[0064] In the shown examples, the receiving box 2, in the shown examples the box body 9, has a connecting section 24, which adjoins the receptacles 11 in the longitudinal direction 13 and at which the supply ducts 7, 8 are connected to the receiving box 2 and are fluidically connected to the receiving box 2.

[0065] In the example shown in FIGS. 1 to 6, the connecting section 24 is provided with two connecting pieces 25, namely a first connecting piece 25 and a second connecting piece 25, in the area adjoining the receptacles 11, wherein the respective connecting piece 25 encloses a connection opening 26 in such a way that the first connecting piece 25 encloses a first connection opening 26, and the second connecting piece 25 encloses a second connection opening 26. The first supply duct 7 is inserted and received in the first connecting piece 25 and is thus connected to the inlet opening 19 of the injection tube 17 via the first connection opening 26. The second supply duct 8 is inserted and received in the second connecting piece 25 and is thus connected to the second duct 12 via the second connection opening 26. The connecting pieces 25 are oriented parallel to the tube bodies 3 in this example.

[0066] On the side of the respective connecting piece 25 facing away from the receptacles 11, a further end wall 20 of the receiving box 2 is introduced and received in an associated recess 23, in order to prevent an outflow of the first fluid from the receiving box 2 via the otherwise open side of the receiving box 2, wherein these end walls 20 can only be seen in FIG. 1.

[0067] As can be seen in the figures, the box body 9 can be provided on the side facing away from the receptacles 11 with depressions 27 or beads 28, which in particular serve for a mechanical stabilization of the box body 9. The depressions 27 or beads 28, respectively, are thereby introduced into the outer wall 10.

[0068] The view from FIG. 5 can be seen in FIG. 7, but with the tube bodies 3. As can be gathered from FIG. 7, the respective tube body 13 is inserted into the associated receptacle 11 in such a way that the tube body 3 penetrates into the associated duct 12 on the front side.

[0069] Different options of the shape of the injection tube 17 are further shown in FIG. 7. It can in particular be seen that, apart from the round cross section shown in FIGS. 2 to 6, the injection tube 17 can also have a semi-circular or an oval cross section. It is likewise possible to form the injection tube 17 by shaping only one of the walls 16 of the central web 15, which otherwise run in a flat manner.

[0070] It can further be seen in FIGS. 2 to 7 that the injection tube 17 always has a smaller cross section, which can be flown through, than the respective duct 12.

[0071] Another exemplary embodiment of the receiving box 2 is shown in FIGS. 8 and 9. This exemplary embodiment differs from the example shown in FIGS. 2 to 6 by the arrangement and design of the connecting pieces 25. In this example, the connecting pieces 25 are formed by an attachment 29, which is attached to the box body 9 on the front side in the longitudinal direction 13, wherein the connecting pieces 25 are oriented in the longitudinal direction 13. It is likewise conceivable to provide a separate attachment 29 for the respective connecting piece 25.

[0072] Further exemplary embodiments of the receiving box 2 are shown in FIGS. 10 and 11. These exemplary embodiments differ from the examples shown in FIGS. 2 to 6 in that the injection tube 17 extends only over a portion of the receiving box 2 or of the box body 9, respectively, in the longitudinal direction 13. As in the example of FIG. 10, the injection tube 17 can have a plurality of outlet openings 18 or, as in the example of FIG. 11, only one outlet opening 18, via which the injection tube 17 is fluidically connected to the first duct 12.

[0073] In the examples of FIGS. 10 and 11, an end wall 20 or baffle 30, which limits the first duct 12 in the longitudinal direction 13, can be arranged in the box body 9, wherein receptacles 11 adjoining the first duct 12 in the longitudinal direction 13, hereinafter also referred to as third receptacles 11, in which non-illustrated tube bodies 3 are received, via which the first flow path 4 leads back into the receiving box 9, as suggested in FIGS. 10 and 11, can be provided in the box body 9.

[0074] As shown in FIG. 12, the receiving box 2 can also be designed in such a way that the injection tube 17 is connected to the respective duct 12 via at least one outlet opening 18 each. This means that the injection tube 17 can have at least one first opening 18 and at least one second opening 18, wherein the at least one first outlet opening 18 is fluidically connected to the first duct 12, in particular leads into the first duct 12, while the at least one second outlet opening 18 is fluidically connected to the second duct 12, in particular leads into the second duct 12. In the case of this exemplary embodiment, the first fluid can thus be introduced into both ducts 12 via the injection duct 17 and can flow from there into the tube bodies 3. In the case of this exemplary embodiment, the second supply duct 8 would thus not be connected to the shown receiving box 2, but for example to a non-illustrated collector, in order to discharge the first fluid from the tube bodies 3. The shown receiving box 2 can alternatively be a receiving box, in the case of which the first fluid flows from one of the ducts 12 into the other duct 12. In this case, the receiving box 2 would thus be designed to divert the first fluid between the ducts 12.

[0075] In the case of the shown examples in FIGS. 1 to 12, the box body 9 in each case limits two ducts 12.

[0076] In contrast, only one duct 12 is limited by the box body 9, in particular the outer wall 10, in the example of FIG. 13, wherein the box body 9 is formed to be double-walled in the area of the injection duct 17. One of the walls 16, in the shown example the wall 16 facing the duct 12, is shaped to form the injection duct 17. It is also conceivable to shape both ducts 16 or only the wall 16, which faces away from the duct 12, to form the injection duct 17.

[0077] In the case of all of the shown examples, the box body 9 is made of a cohesive material, for example of sheet metal. For this purpose, the cohesive material is shaped to limit the at least one duct 12 and to form the injection tube 17. The receptacles 11 and the outlet opening 18 as well as the inlet opening 19 are in each case introduced into the cohesive material prior to the shaping or after the shaping. The same applies for the connection openings 26 in the example of FIGS. 1 to 6 as well as 10 and 11.