DE102008058808A1 - Heat exchanger assembly i.e. refrigerant condenser assembly, for motor vehicle air conditioning system, has connection formed by soldering for connection of separate tubular components of collector - Google Patents

Abstract

The assembly (1) has a collector (5) with a closable opening and an overflow opening standing in fluid connection to a condenser tube (3) and/or a collecting tube (4). A closing device (25) closes the closable opening of the collector. A dryer and/or a filter is arranged in the collector and/or in the closing device. The collector is manufactured as single-piece by forward impact extrusion, where the collector has no form and/or force and/or material-conclusive connection. A connection is formed by soldering for connection of separate tubular components of the collector. Independent claims are also included for the following: (1) a method for production of a heat exchanger assembly (2) a method for production of a motor vehicle air conditioning system.

Description

The The present invention relates to a heat exchanger assembly according to the preamble of claim 1, a method for producing a heat exchanger assembly according to the preamble of claim 6 and a Method for producing an automotive air conditioning system according to the preamble of claim 15. The invention further relates to an automotive air conditioning system.

In Heat exchanger assemblies, especially in refrigerant condenser assemblies for a motor vehicle air conditioning, z. B. a vaporous Refrigerant in the liquid state transferred and then the liquid refrigerant further "undercooled". The refrigerant condenser assembly forms a structural unit within an automotive air conditioning system with an evaporator and a compressor.

The DE 10 2005 033 168 A1 shows a dryer for a cooling medium in a cooling medium circuit, in particular for an air conditioning system of a vehicle. The dryer comprises a one-piece housing, for example an aluminum extruded part.

The DE 10 2007 018 722 A1 shows a condenser for the air conditioning system of a motor vehicle having two manifolds and a container arranged adjacent to the one collecting tube for receiving the desiccant of the refrigerant of the air conditioner, wherein the collecting tube and the container are connected by means of at least one flow opening. The container is an extruded tube.

From the DE 103 53 160 A1 a heat exchanger assembly is known. Horizontally arranged cooling tubes are provided with cooling fins. The cooling tubes are fluidly connected to each other by means of two vertically positioned manifolds. A sump is fluidly connected to one of the two headers. In the collection a dryer is arranged. An opening at the lower end of the collecting container is closed by a closing device designed as a closure element. The closure element is firmly bonded by means of a soldered connection to the collecting container. The sump is made in two parts with a first tube and a profile piece. The first tube is thinner than the profile piece and connected by means of a solder joint with the profile piece. Disadvantageously, the production of the collecting container is thus complicated and expensive and due to the solder joint prone to failure especially for leaks.

From the DE 100 39 260 B4 a heat exchanger assembly is known. A collecting container is closed by a plug as a closure device. A locking ring engages in an annular groove on the collecting container and thus positively connects the plug with the collecting container.

Clippings for heat exchanger assemblies point generally a first thin-walled sections, whose jacket wall thickness of the maximum pressure in the collecting container depends, the collecting container Must hold, and a second section on. The first and second section, for example by extrusion of aluminum manufactured as two separate components. The second thick-walled section must machined to a shutter opening of the collecting container with a closure device to be able to. For this example, an annular groove or a thread on the sump on the second section train. The first and second sections of the collection container as two separate components must be expensive and expensive, z. B. by means of soldering, deformations or additional components, be connected to each other. This connection is also susceptible to faults, so that leaks occur here can.

The It is therefore an object of the present invention to provide a heat exchanger assembly, an automotive air conditioning system and a method of manufacturing a heat exchanger assembly and an automotive air conditioning system to provide at the collection container has no or almost no risk of leaks and in the Production is cheap.

This object is achieved with a heat exchanger assembly, in particular a refrigerant condenser assembly for an automotive air conditioning system, comprising at least one cooling tube for passing a fluid to be cooled, in particular a refrigerant, at least one manifold, in particular two manifolds, for fluidly connecting the at least one cooling tube, in particular for fluidly connecting at least two Cooling tubes with each other, a collecting container with a closure opening and at least one overflow opening by means of the collecting container in fluid communication with the at least one cooling tube and / or the at least one collecting tube and a closure device for closing the closure opening of the collecting container and preferably in the collecting container and / or in the Closing means a dryer and / or a filter is arranged, wherein the collecting container is produced by means of extrusion, in particular forward extrusion, and / or r the collecting container is in one piece and / or the collecting container no positive and / or non-positive and / or cohesive connection, z. As a compound prepared by solder, preferably for the connection of separate components of Sammelbe container.

In a further embodiment, the collection container only a closure opening on and / or the collecting container includes a sump bottom and a pipe section, one end of the pipe section from the sump bottom is closed and the other end of the pipe section the shutter opening forms and / or the pipe section as a, in cross section in particular circular or rectangular, Mantelwandung in a first Area at the collection container bottom a smaller jacket wall thickness as in a second area at the closure opening.

In an additional embodiment, the collection container at least one support area for resting on the at least one Collecting tube on and / or the support area is one piece with the rest Collecting container produced during extrusion and / or In particular, the support area is a thickening of the jacket wall educated.

In a complementary variant is the surface the support area complementary, z. B. concave or convex, to the portion of the surface of the at least one collection tube formed on the support area on the at least one Collecting tube rests and / or the at least one overflow is formed on the support area.

A Automotive air conditioning system according to the invention comprises the heat exchanger assembly described in this application.

inventive Method for producing a heat exchanger assembly, in particular refrigerant condenser assembly for an automotive air conditioning system, with the steps: available provide at least one cooling tube for passing a to be cooled fluids, in particular a refrigerant, make available at least one manifold, in particular of two manifolds, for fluidly connecting the at least one cooling tube, Producing a collection container with a closure opening and with at least one overflow opening for fluid communication from the sump to the at least one cooling tube and / or the at least a manifold and vice versa, provide one Closing device for closing the closure opening of Collecting container, connecting the at least one cooling tube, the at least one collecting tube and the collecting container together, so that they are mechanically connected and a fluid conducting connection between the at least one Cooling tube, the at least one collecting tube and the collecting container consists, closing the closure opening of the collection container with the closure device, wherein the collecting container means Extrusion molding, especially forward extrusion molding or backward extrusion.

In In another embodiment, the sump is made only one blank, z. B. made of metal, for. Aluminum or steel, made in a die from a stamp by reshaping the blank, in particular pressure-formed, is. In particular, the blank is a pipe and is produced for example by extrusion.

expedient the collection container is to the effect of extrusion manufactured in one piece, that the collecting tank only one Has closure opening and / or the collecting container is to that effect produced in one piece during extrusion, that the sump a sump bottom and a pipe section, wherein one end of the pipe section is sealed fluid-tight from the sump bottom and the other end of the pipe section the shutter opening forms.

In In another embodiment, the pipe section is in Extruding with a, in cross-section in particular circular or rectangular, jacket wall in the area of the collecting container bottom manufactured with a smaller shell wall thickness than in the area of the closure opening.

In a complementary embodiment of the collection container in the area of the other end with the closure opening machined, z. B. by milling, drilling or turning, machined to a fluid-tight closure of the closure opening to allow with the closure device. The cutting Processing is used, for example, to form an annular groove or a high size accuracy of the shutter opening for exact and thus fluid-tight fitting of the closure opening.

Preferably is the extrusion of the collection of the Collecting container with a support area for resting on the at least one collecting tube provided, in particular by the matrix has a corresponding shape for the formation of the support area.

In an additional embodiment is the surface the support area complementary, z. B. concave or convex, to the portion of the surface of the at least one collection tube is formed during extrusion, on which the support area is placed on the at least one manifold. This edition area can be arranged several times around the circumference.

In a variant is after the extrusion of the collection container the at least one overflow opening machined, z. B. with drilling or milling, in the collection incorporated.

expedient be before closing the shutter opening with the closing device in the collecting container Dryer and / or a filter introduced and fixed and / or the Closure device is with the dryer and / or the filter Mistake.

One inventive method for producing a Automotive air conditioning system includes the steps: available provide a compressor, provide one Evaporator, making a refrigerant condenser assembly, provide lines for passing a Refrigerant, preferably provide a blower, preferably provide at least one air duct and connecting or combining the Compressor, the evaporator, the refrigerant condenser assembly, the lines, preferably the blower and preferably the at least one air duct to the motor vehicle air conditioner, wherein at least one step of one described in this application Process for producing the heat exchanger assembly is executed and / or described in this application Refrigerant capacitor assembly is made.

In In another embodiment, the heat exchanger assembly at least partially made of metal, for. As aluminum or steel or made of plastic.

In a complementary variant of the collection container produced with cold, warm or hot extrusion presses.

in the The following will be an embodiment of the invention with reference to the accompanying drawings described. It shows:

1 a partial perspective view of a refrigerant condenser assembly,

2 a partial perspective view of the Kältemitelkondensatorbaugruppe according to 1 partly without a jacket wall of a collecting container,

3 a partial perspective view of the collecting container according to 1 .

4 a side view of the collecting container according to 1 .

5 a cross section according to section AA in 4 and

6 a cross section according to section BB in 4 ,

In 1 is a refrigerant condenser assembly 2 trained heat exchanger assembly 1 shown in a perspective view. The refrigerant condenser assembly 2 is part of an automotive air conditioning system with an evaporator and a compressor (not shown). By horizontally arranged cooling tubes 3 flows to condensing and cooling refrigerant ( 1 and 2 ). The cooling pipes 3 open at their respective ends in a vertical manifold 4 ie there are two headers 4 each at the ends of the cooling tubes 3 available. In 1 and 2 is just a collection pipe 4 shown. The manifold 4 has cooling tube openings for this purpose 17 ( 1 and 2 ), through which the ends of the cooling tubes 3 into the manifold 4 protrude. The manifold 4 consists of a floor 21 and a lid 22 , The floor 21 and the lid 22 are U-shaped in cross-section. At the bottom 21 are the cooling tube openings 17 educated. Between the cooling pipes 3 are meandering cooling fins 18 arranged, which with the cooling pipes 3 in thermal connection by means of heat conduction. This increases the area available for cooling the refrigerant. The cooling pipes 3 , the cooling fins 18 and the two manifolds 4 are generally made of metal, especially aluminum.

At the manifold 4 is, also vertically aligned, a collection container 5 arranged ( 1 . 2 ). The collection container 5 is by means of two overflow openings 6 ( 3 ) in fluid communication with the manifold 4 and thus also indirectly in fluid communication with the cooling tubes 3 , In the collection container 5 is a dryer 8th and a filter 9 arranged. The dryer 8th is hygroscopic and can absorb water or moisture from the refrigerant ( 2 ). The collection container 5 is at an upper end 19 with the manifold 4 connected by means of a double lid (not shown). At the bottom 20 is the collection container 5 with the manifold 4 mechanically with a concave support area 16 connected. The support area 16 is complementary with substantially the same curvature as the outside of the manifold 4 educated. The support area 16 lies on the manifold 4 on. The two overflow openings 6 are at the pad area 16 educated ( 3 ). The collection container 5 comprises a cylindrical jacket wall 13 as a pipe section 11 at the top 19 from a sump bottom 10 is closed ( 4 ). A shutter opening 7 at the bottom 20 of the collection container 5 is by means of a closure device 25 sealed fluid-tight. The closure device 25 is at For example, as a plug 23 or designed as a screw. With a stopper 23 ( 1 and 2 ) is the jacket wall 13 inside in the area of the lower end 19 of the collection container 5 with an annular groove 24 ( 3 ) provided for receiving a retaining ring (not shown). A screw as a closure device 25 requires the formation of an internal thread (not shown) on the inside in the region of the lower end 19 of the collection container 5 , The ring groove 24 or the internal thread are machined. The closure device 25 can also with the collection container 5 be connected fluid-tight by gluing or welding.

The jacket wall 13 of the collection container 5 is in a first upper area 14 formed with a smaller jacket wall thickness than in a second lower area 15 ( 1 and 2 ). The first area 14 is in 4 essentially enclosed by a dashed frame. The jacket wall thickness in the first area 14 is sized so that the sump 5 the maximum occurring pressure in the reservoir 5 Can withstand. For fluid-tight connection of the closure device 25 with the collection container 5 at the closure opening 7 is at the second area 15 the jacket wall 13 a machining required. So that even after machining the second area 15 in all areas, in particular the machined area, has a required minimum jacket wall thickness, is the larger shell wall thickness of the second area 15 required before machining.

The entire manifold 5 with the sump bottom 10 , the jacket wall 13 with the first area 14 and the second area 15 with different shell wall thicknesses as well as the thickening 12 trained support area 16 are made in one piece from aluminum with forward extrusion presses.

The manifold 5 is made by forward extrusion from a tubular blank of aluminum with a constant shell wall thickness. The blank is deformed in a matrix of a moving punch under pressure, so that the collecting container described above 5 can be made in one piece. The matrix thus has a corresponding shape, that of the outer shape of the collecting container 5 equivalent. After making the manifold 5 with extrusion with the jacket wall 13 with different shell wall thicknesses and the support area 16 as a thickening 12 one-piece from the blank are in the support area 16 as in the direction of a longitudinal axis 26 of the collection container 5 Thickened jacket wall 13 two overflow openings 6 drilled. The manifold 4 is on the support area 16 Put on and with this on the pad area 16 soldered. The manifold 4 ie the lid 22 of the manifold 4 , Is provided with two tubular nozzle or passages (not shown), whose outer diameter is slightly smaller than the inner diameter of the two overflow openings 6 of the collection container 5 , The nozzles are in the two overflow 6 introduced during the connection of the manifold 4 with the collection container 5 and before soldering the support area 16 with the outside of the collecting tube 4 radially outwardly stretched by a tool, so that the fluid-conducting connection between the manifold 4 and the collection container 5 by means of the two overflow openings 5 and the two nozzles have no leaks, because the tightness due to the stretching of the nozzle and the solder joint to the support area 16 is guaranteed (not shown).

Overall, the inventive heat exchanger assembly 1 considerable advantages. The collection container 5 is made in one piece by means of forward extrusion and has a jacket wall 13 with different jacket wall thickness and a support area 16 on. The different jacket wall thicknesses are required to the minimum amount of material for the preparation of the collection container 5 to use. The jacket wall thickness in the first area 14 is due to the maximum pressure in the sump 5 determined and the jacket wall thickness in the second area depends on the machining. The collection container 5 has no fault-prone and costly connections, eg. As solder joints, between two components. Furthermore, the support area 16 in one piece with the rest of the collection container 5 produced.

1

Wärmeübertragerbaugruppe

2

Refrigerant condenser assembly

3

cooling pipe

4

manifold

5

Clippings

6

overflow

7

shutter opening

8th

dryer

9

filter

10

sump floor

11

pipe section of the collection container

12

thickening

13

outer wall of the pipe section

14

First Area of the jacket wall

15

Second Area of the jacket wall

16

support area

17

Cooling pipe opening

18

cooling fins

19

upper End of the collection container

20

lower End of the collection container

21

ground of the manifold

22

cover of the manifold

23

Plug

24

ring groove

25

closure device

26

longitudinal axis

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102005033168 A1 [0003]
• DE 102007018722 A1 [0004]
• - DE 10353160 A1 [0005]
• - DE 10039260 B4 [0006]

Claims (15)

Heat exchanger assembly ( 1 ), in particular refrigerant capacitor assembly ( 2 ) for an automotive air conditioning system, comprising - at least one cooling tube ( 3 ) for passing a fluid to be cooled, in particular a refrigerant, - at least one collecting tube ( 4 ), in particular two header pipes ( 4 ), for fluidly connecting the at least one cooling tube ( 3 ), - a collecting container ( 5 ) with a closure opening ( 7 ) and with at least one overflow opening ( 6 ) by means of the collecting container ( 5 ) in fluid communication with the at least one cooling tube ( 3 ) and / or the at least one collecting tube ( 4 ), - a closure device ( 25 ) for closing the closure opening ( 7 ) of the collecting container ( 5 ) and - preferably in the collecting container ( 5 ) and / or in the closure device ( 25 ) a dryer ( 8th ) and / or a filter ( 9 ), characterized in that the collecting container ( 5 ) is produced by extrusion, in particular forward extrusion, and / or the collecting container ( 5 ) is in one piece and / or the collecting container no positive and / or non-positive and / or cohesive connection, for. Example, a compound prepared by solder, preferably for connection of separate tubular components of the collecting container ( 5 ), having. Heat exchanger assembly according to claim 1, characterized in that the collecting container ( 5 ) only one shutter opening ( 7 ) and / or the collecting container ( 5 ) a collecting tank bottom ( 10 ) and a pipe section ( 11 ), one end ( 19 ) of the pipe section ( 11 ) from the sump bottom ( 10 ) is closed and the other end ( 20 ) of the pipe section ( 11 ) the closure opening ( 7 ) and / or the pipe section ( 11 ) as a, in cross-section in particular circular or rectangular, shell wall ( 13 ) in a first area ( 14 ) at the collecting container bottom ( 10 ) has a smaller jacket wall thickness than in a second area ( 15 ) at the closure opening ( 7 ). Heat exchanger assembly according to claim 1 or 2, characterized in that the collecting container ( 5 ) at least one support area ( 16 ) for resting on the at least one collecting tube ( 4 ) and / or the support area ( 16 ) in one piece with the rest of the collection container ( 5 ) is produced during extrusion and / or in particular the support area ( 16 ) as a thickening ( 12 ) of the jacket wall ( 13 ) is trained. Heat exchanger assembly according to 3, characterized in that the surface of the support area ( 16 ) complementary, z. B. concave or convex, to the portion of the surface of the at least one collecting tube ( 4 ) is formed, on which the support area ( 16 ) on the at least one collecting tube ( 4 ) rests and / or the at least one overflow opening ( 6 ) at the support area ( 16 ) is trained. Motor vehicle air conditioning system, characterized in that the motor vehicle air conditioning system a heat exchanger assembly ( 1 ) according to one or more of the preceding claims. Method for producing a heat exchanger assembly ( 1 ), in particular refrigerant capacitor assembly ( 2 ) for an automotive air conditioning system, comprising the steps of: - providing at least one cooling tube ( 3 ) for passing a fluid to be cooled, in particular a refrigerant, - provide at least one collecting tube ( 4 ), in particular two headers ( 4 ), for fluidly connecting the at least one cooling tube ( 3 ), - producing a collecting container ( 5 ) with a closure opening and with at least one overflow opening for a fluid connection from the collecting container ( 5 ) to the at least one cooling tube ( 3 ) and / or the at least one collecting tube ( 4 ) and vice versa, - provide a closure device ( 25 ) for closing the closure opening ( 7 ) of the collecting container ( 5 ), - connecting the at least one cooling tube ( 3 ), of the at least one collecting tube ( 4 ) and the collection container ( 5 ) so that they are mechanically connected to each other and a fluid-conducting connection between the at least one cooling tube ( 3 ), the at least one collecting pipe ( 4 ) and the collecting container ( 5 ) and - closing the closure opening ( 7 ) of the collecting container ( 5 ) with the closure device ( 25 ), characterized in that the collecting container ( 5 ) is produced by extrusion, in particular forward extrusion. Method according to claim 6, characterized in that the collecting container ( 5 ) from only one blank, z. B. made of metal, for. As aluminum or steel, is produced in a die of a stamp by the blank formed, in particular pressure-formed, is. Method according to claim 6 or 7, characterized in that the collecting container ( 5 ) is made in one piece during extrusion, so that the collecting container ( 5 ) only one shutter opening ( 7 ) and / or the collecting container ( 5 ) is made in one piece during extrusion, so that the collecting container ( 5 ) a collecting tank bottom ( 10 ) and a pipe section ( 11 ) around sums up, with one end ( 19 ) of the pipe section ( 11 ) from the sump bottom ( 10 ) is closed and the other end ( 20 ) of the pipe section ( 11 ) the closure opening ( 7 ). Method according to one or more of claims 6 to 8, characterized in that the pipe section ( 11 ) during extrusion with a, in cross-section in particular circular or rectangular, shell wall ( 13 ) in the area of the collecting container bottom ( 19 ) is produced with a smaller jacket wall thickness than in the region of the closure opening ( 7 ). Method according to one or more of claims 6 to 9, characterized in that the collecting container ( 5 ) in the area of the other end ( 20 ) with the closure opening ( 7 ) machined, z. B. by milling or turning, to a fluid-tight closing of the closure opening ( 7 ) with the closure device ( 25 ). Method according to one or more of claims 6 to 10, characterized in that during the extrusion of the collecting container ( 5 ) the collecting container ( 5 ) with a support area ( 16 ) for resting on the at least one collecting tube ( 4 ), in particular in that the matrix has a corresponding shape for forming the support area ( 16 ) having. A method according to claim 11, characterized in that the surface of the support area ( 16 ) complementary, z. B. concave or convex, to the portion of the surface of the at least one collecting tube ( 4 ) is formed during extrusion, on which the support area ( 16 ) on the at least one collecting tube ( 4 ) is launched. Method according to one or more of claims 6 to 12, characterized in that after the extrusion of the collecting container ( 5 ) the at least one overflow opening ( 6 ) machined, z. B. with drilling or milling, in the collecting container ( 5 ) is incorporated. Method according to one or more of claims 6 to 13, characterized in that before closing the closure opening ( 7 ) with the closure device ( 25 ) in the collecting container ( 5 ) a dryer ( 8th ) and / or a filter ( 9 ) is introduced and fixed and / or the closure device ( 25 ) with the dryer ( 8th ) and / or the filter ( 9 ). A method of manufacturing an automotive air conditioning system comprising the steps of: - providing a compressor, - providing an evaporator, - producing a refrigerant condenser assembly ( 2 ), - providing lines for passing a refrigerant, - preferably providing a blower, - preferably providing at least one air duct and - connecting or combining the compressor, the evaporator, the refrigerant condenser assembly ( 2 ), the lines, preferably of the blower and preferably of the at least one air duct to the motor vehicle air conditioner, characterized in that at least one step of a method according to one or more of claims 6 to 14 is executed and / or a refrigerant condenser assembly ( 2 ) is produced according to one or more of claims 1 to 5.