Heat exchanger with housing parts connected by flange ring connection

Abstract

A heat exchanger may include a tubular housing, a flange ring, two bases, and heat exchanger tubes that run through the housing and are each held in the bases at a longitudinal end side. A first flow channel may be formed in the heat exchanger tubes, and a second flow channel may be formed between the heat exchanger tubes and the housing. The housing may be formed from two one-piece and pot-shaped housing parts. Each housing part may have a housing section, a flange ring section, and a base. The two housing parts may be connectable to one another via the two flange ring sections.

Claims

1. A heat exchanger comprising: a tubular housing; a flange ring; two bases; and heat exchanger tubes that run through the housing and are each held in the bases at a longitudinal end side; wherein a first flow channel is formed in the heat exchanger tubes, and a second flow channel is formed between the heat exchanger tubes and the housing; wherein the housing is formed from two one-piece and pot-shaped housing parts, each housing part having a housing section, a flange ring section extending radially outward from the housing section, and one of the bases, the two housing parts being connectable to one another via the two flange ring sections; wherein an end portion of each flange ring section extends in a same direction as the heat exchanger tubes, the two flange ring sections overlapping each other at the respective end portions; and wherein a cylindrical circumferential metal sheet is provided inside the housing where the two flange ring sections connect the two housing parts, a cavity being arranged between the metal sheet and the flange ring sections, the cavity extending from the metal sheet to the flange ring sections.

2. The heat exchanger according to claim 1, wherein the flange ring section of one housing part has an external diameter configured to be complementary to an internal diameter of the flange ring section of the other housing part such that the one housing part is slidable into the other housing part.

3. The heat exchanger according to claim 2, wherein the two housing parts are one of soldered, welded, or joined to one another at the flange ring sections.

4. The heat exchanger according to claim 2, wherein the heat exchanger is configured as an exhaust gas heat exchanger.

5. The heat exchanger according to claim 2, wherein at least one of the housing parts is configured as a formed sheet metal stamped part produced by deep drawing.

6. The heat exchanger according to claim 2, wherein at least one of the housing parts has at least one of an inlet connection and an outlet connection for coolant and that is one of moulded on or attached to the respective housing section of the at least one of the housing parts.

7. The heat exchanger according to claim 1, wherein the two housing parts are one of soldered, welded, or joined to one another at the flange ring sections.

8. The heat exchanger according to claim 1, wherein the heat exchanger is configured as an exhaust gas heat exchanger.

9. The heat exchanger according to claim 1, wherein at least one of the housing parts is configured as a formed sheet metal stamped part produced by deep drawing.

10. The heat exchanger according to claim 1, wherein at least one of the housing parts has at least one of an inlet connection and an outlet connection for coolant and that is one of moulded on or attached to the respective housing section of the at least one of the housing parts.

11. The heat exchanger according to claim 10, wherein the inlet connection and the outlet connection are in the same housing part.

12. The heat exchanger according to claim 1, wherein the cavity is sealed.

13. The heat exchanger according to claim 1, wherein the metal sheet has openings forming a passage for coolant into or out of the cavity.

14. A heat exchanger comprising: a tubular housing formed from two one-piece and pot-shaped housing parts, each housing part having a housing section, a flange ring section extending radially outward from the housing section, a base, and inlet and outlet connections one of moulded on or attached to the tubular housing section, the two housing parts being connectable to one another via the two flange ring sections; a cylindrical circumferential metal sheet that is inside the housing where the two flange ring sections connect the two housing parts, a sealed cavity being arranged between the metal sheet and the flange ring sections, the metal sheet and the flange ring sections defining the cavity; and heat exchanger tubes that run through the housing and are each held in the base of each housing part at a longitudinal end side of each heat exchanger tube; wherein a first flow channel is formed in the heat exchanger tubes, and a second flow channel is formed between the heat exchanger tubes and the housing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the figures, in each case schematically

(2) FIG. 1 shows a sectional view through a heat exchanger according to the invention in the mounted state,

(3) FIG. 2 shows an exploded view of the heat exchanger but without heat exchanger tubes,

(4) FIG. 3 shows a perspective view of a heat exchanger according to the invention,

(5) FIG. 4 shows a view as in FIG. 2 but from a perspective view.

(6) According to FIG. 1, a heat exchanger 1 according to the invention, which for example can be configured as an exhaust gas heat exchanger, comprises a tubular housing 2, a flange ring 3, two bases 4 as well as heat exchanger tubes 5, wherein the heat exchanger tubes 5 run through the housing 2 and are each held in the bases 4 on the longitudinal end side. A first flow channel, for example, for exhaust gas, runs in the heat exchanger tubes 5 whilst a second flow channel, for example, for cooling medium/coolant is formed between the heat exchanger tubes 5 and the housing 2. Three heat exchanger tubes 5 are depicted in FIG. 1, wherein naturally significantly more heat exchanger tubes 5 are arranged in the heat exchanger 1 and have merely been omitted for the sake of clarity.

(7) According to the invention, the housing 2 is now composed of two, in each case one-piece and pot-shaped housing parts 6 and 7, of which each comprises a housing section 8, a flange ring section 9 and a base 4 and wherein the two housing parts 6, 7 can be joined to one another via the two flange ring sections 9. As a result of the configuration of the two housing parts 6, 7 according to the invention, in particular hitherto required joints between the bases 4 and the housing sections 8 can be omitted since these are now implemented in one piece with one another. Each of the bases 4 in this case has a row of passage openings 10 (compare FIGS. 3 and 4) in which the heat exchanger tubes 5 are held.

(8) On examining FIG. 1, it can be seen that an at least partially hollow-cylindrical circumferential metal sheet 13 is provided inside the housing 2 in the region of the two flange ring sections 9. Alternatively a sealed cavity 14 can be arranged between the metal sheet 13 and the flange ring sections 9 or however the metal sheet 13 has openings 15 which form a passage for coolant into the cavity 14. It is also feasible that the openings 15 are configured to be round or angular with a predetermined cross-sectional area or contour so that air bubbles possibly forming in the cavity 14 can only pass with a certain (minimized) volume into the coolant. The metal sheet 13 can be fastened, for example, by welding or soldering on the inner side of the housing 2. It can separate the space through which coolant flows completely or partially in a fluid-tight manner from the circumferential cavity 14 of the flange ring section.

(9) If FIGS. 1 and 2 are examined once again, it can be seen that the flange ring section 9 of one housing part 6 has an external diameter which is configured to be complementary to an internal diameter of the flange ring section 9 of the other housing part 7 and can thus be slid into this. The two housing parts 6, 7 can thus be assembled by simply sliding the respective sections 9 into one another. The two housing parts 6, 7 are in this case soldered, welded or otherwise joined to one another at the flange ring sections 9 and thereby tightly connected to one another. In order to fabricate or manufacture the heat exchanger 1, the two housing halves, i.e. the two housing parts 6, 7 with the heat exchanger tubes 5 arranged therein are slid into one another and joined for example in a soldering furnace, wherein not only the joint at the two interconnected flange ring sections 9 is made but at the same time the joints between the heat exchanger tubes 5 and the bases 4.

(10) The two housing parts 6, 7 can be configured as formed sheet metal stamped parts and in particular can be produced by deep drawing. As a result, not only simple production in terms of production technology but at the same time high-quality and cost-effective manufacture is possible. The two housing parts 6, 7 can be configured as identical parts for example with the exception of the flange ring section 9 but can also have a different axial length or additional different components such as, for example an inlet connection 11 and/or an outlet connection 12 for coolant.

(11) With the heat exchanger 1 according to the invention or the two housing parts 6, 7, it is not only possible to reduce the number of parts and associated with this the storage and logistics costs but the production, i.e. assembly of the heat exchanger 1 can be generally simplified and improved in terms of quality. As a result of the one-piece configuration of the base 4 with the respective housing section 8 of the housing part 6, 7, a joint hitherto required and at risk of leaks between these two parts 4, 8 is omitted for example with the result that an improvement in quality not to be underestimated can be achieved.