EP2420763A2 - Coolant condenser module - Google Patents

Abstract

The module (1) has a heat exchanger (2) comprising a refrigerant channel and a coolant channel for passing a refrigerant (16) and a coolant to transfer heat from the refrigerant to the coolant. A refrigerant transfer channel (17) transfers the refrigerant into a collecting container (14). A refrigerant exhaust opening (19) formed at the collecting container discharges the refrigerant from the collecting container. The heat exchanger and the collecting container are mechanically connected with each other by a base plate (21). An independent claim is also included for an air conditioning apparatus for a motor car, comprising an expansion valve.

Description

The invention relates to a refrigerant condenser module according to the preamble of claim 1 and an automotive air conditioning system according to the preamble of claim 10.

In motor vehicles, automotive air conditioning systems are used to cool and / or heat the air to be supplied to a vehicle interior. For this purpose, the Kraftfahrzeugklimaanlage a refrigerant condenser module with a heat exchanger for condensation of the refrigerant and a collecting container and also an expansion element, an evaporator and a compressor to form a refrigerant circuit. The heat exchanger of the refrigerant condenser module serves as a condenser for the refrigerant and in this heat exchanger as a condenser, the refrigerant is liquefied. It is known to cool the capacitor by means of ambient air or with the aid of liquid from a coolant circuit of the motor vehicle, When using a capacitor on Kälteniittelkondensatormodul, the liquid or

is water cooled, thus the heat of condensation is released to the coolant as water.

From the DE 10 2004 044 861 A1 a heat exchanger for motor vehicles is known, which has a first chamber means and a second chamber chamber spaced therefrom, and a plurality of connecting tubes, each extending with its first end in the first chamber means and with its other, second end, in the second chamber means each of these connecting tubes has at least one channel with a straight longitudinal axis.

The WO 2004/042293 A1 shows a refrigerant condenser module with a heat exchanger as a condenser with a refrigerant inlet, a refrigerant outlet and a coolant inlet and outlet. Thereby, the heat to be transferred from the refrigerant to the coolant, wherein the heat exchanger is designed as a capacitor in stacked disk design. Furthermore, the refrigerant condenser module has a collecting container for the refrigerant.

Therefore, the object of the present invention is to provide a refrigerant condenser module and a motor vehicle air conditioning system which, with a simple and economical production, enables secure attachment to a motor vehicle and works reliably in operation over the long term.

This object is achieved with a refrigerant condenser module for condensing refrigerant for an automotive air conditioning system, comprising a heat exchanger as a condenser having a refrigerant inlet opening, a refrigerant outlet opening, a coolant inlet opening and a coolant outlet opening, wherein the heat exchanger has a refrigerant channel and a coolant passage for passing refrigerant through the refrigerant passage and coolant through the coolant passage for transferring heat from the refrigerant to the coolant, a sump for the refrigerant, a first refrigerant transfer passage for guiding the refrigerant from the heat exchanger to the sump the sump container refrigerant outlet opening for distributing the refrigerant from the sump, wherein the heat exchanger and the sump are mechanically connected to each other with at least one base plate. The refrigerant condenser module is thus easy to manufacture and inexpensive because the sump and the heat exchanger as a capacitor are simply mechanically connected to each other with the at least one base plate, for example by means of a solder joint and / or a screw or rivet. The mechanical connection between the heat exchanger and the collecting container and the at least one base plate is preferably a detachable or a permanent connection. The base plate is also a connecting plate, a connecting disc or a plate-like connecting grid with openings perpendicular to a plane spanned by the plate-like connecting grid considered.

In an additional embodiment, the at least one base plate is provided with at least one flattened part for fixing the refrigerant condenser module to a motor vehicle, in particular a body of the motor vehicle. With the holding part, the refrigerant condenser module can be easily attached to a motor vehicle, in particular a body. As a result, the expense required for this can be kept low during assembly of the refrigerant condenser module and thus costs can be saved.

In a supplementary embodiment, the holding part and a base plate are integrally formed and / or the holding part and the base plate with a bend, z. B. with a Kröpfungswinkel of substantially 90 °, connected to each other and / or the holding part has at least one fastening means, such as a bore, a screw, a rivet or a hook, and / or the holding part is as at least one plate, formed at least one web or at least one rod. The holding part and the base plate are integrally formed, so that in an advantageous manner with only one component both the holding part for fixing the refrigerant condenser module to the motor vehicle and the base plate for connecting the heat exchanger and the collecting container can be provided. As a result, costs can be saved in the manufacture of the refrigerant condenser due to the component only, and furthermore, in attaching the refrigerating condenser to the motor vehicle, reliable connection of both the heat exchanger and the collecting container can be easily provided.

In a further variant, when the refrigerant-capacitor module is attached to the motor vehicle, the at least one base plate is aligned substantially horizontally or vertically. Aligned substantially horizontally means that the at least one base plate is aligned with a deviation of less than 30 °, 20 °, 10 ° or 5 ° to a vertical plane or a vertical straight line. The at least one base plate is for this purpose formed substantially disc-shaped. The alignment of the at least one base plate in a fastening of the refrigerant condenser module to the motor vehicle can preferably be derived or determined from the geometry of the holding part. In an additional embodiment, the collecting container and / or the heat exchanger are arranged and / or fixed on an upper side or an underside of the base plate and / or the collecting container and the heat exchanger are arranged next to one another. The collecting container and / or the heat exchanger are arranged or fixed directly or indirectly on the upper side of the base plate. In a solder joint between the heat exchanger and the base plate of the heat exchanger, for example, indirectly attached to the base plate, because between the Wärmeübertragerund the base plate, the solder joint is present. If the collecting container is fastened to the base plate, for example by means of a screw connection, the collecting container can rest directly on the base plate.

Suitably, the refrigerant condenser module comprises a subcooled heat exchanger for cooling the refrigerant with the coolant and a second refrigerant transfer passage for conducting the refrigerant from the sump to the subcool heat exchanger.

In a supplementary embodiment, the heat exchanger and / or the supercooling heat exchanger are designed in stacked disk construction, and preferably stack disks of the heat exchanger and / or the supercooled heat exchanger are soldered to one another.

In an additional embodiment, the heat exchanger and / or the supercooling heat exchanger is designed as a spiral heat exchanger, a tube bundle heat exchanger or as a jacket tube heat exchanger.

In a supplementary variant of the heat exchanger and / or the supercooling heat exchanger is soldered to at least one base plate and / or is the heat exchanger and / or the supercooling heat exchanger with the at least a base plate releasably connected, for example with a screw or rivet connection.

In an additional embodiment, the collecting container is detachable on at least one base plate, for. B. with a screw or rivet connection, or the collecting container is soldered to at least one base plate and / or the first and / or second refrigerant transfer channel is formed with a Uberleitungsrohr and / or is in at least two base plates, in particular two or three base plates, integrated and / or within the collection container hygroscopic material is arranged as a dryer and / or a filter and / or the coolant is a liquid. The first and / or second refrigerant transfer duct is integrated in at least two base plates, for example, in such a way that a first, second and third base plate are arranged one above the other, with the first base plate at the top, the second base plate at the center and the third base plate at the bottom. In this case, the second middle base plate has at least one slot, so that thereby forms between the first and third base plate on the slot of the first, and / or second refrigerant transfer channel. The first and / or second base plate in this case has openings through which the refrigerant flows into the Kühlemitelüberleltungskanal on or out. Notwithstanding this, the first and / or second refrigerant transfer channel can also be integrated to two base plates so that a first and a second base plate are arranged one above the other and impressions are present on the first and / or second base plate, so that due to these impressions or impressions between the first and second base plate forms the first and / or second refrigerant transfer passage. For introducing or discharging the refrigerant into this refrigerant transfer channel, the first and / or second base plate has corresponding openings or an opening in each case.

In an additional embodiment, both the heat exchanger, the reservoir and preferably also the supercooling heat exchanger is soldered to the at least one base plate, so advantageously with only one manufacturing step during soldering in a brazing furnace, both the heat exchanger and the reservoir and the optional subcooled heat exchanger to the at least a base plate are fixed and thereby no additional operations are required and preferably in this soldering and the Stapelschelben the heat exchanger are soldered.

In an additional embodiment, the components or there is at least one base plate and / or the holding part and / or the collecting container and / or the heat exchanger and / or the supercooling heat exchanger at least partially, in particular completely, made of metal, in particular steel or aluminum or copper.

An automotive air conditioning system according to the invention comprising a refrigerant condenser module, an expansion valve, an evaporator and a compressor for forming a cold circuit, wherein the refrigerant condenser module is configured as a refrigerant condenser module described in this patent application.

In an additional embodiment, the heat exchanger and / or the supercooling heat transfer is made of extruded, rolled or welded profiles, preferably with turbulence inserts.

In an additional embodiment, the heat exchanger and / or the supercooling heat exchanger according to the countercurrent and / or the DC principle operated or formed for the refrigerant and the coolant.

In an alternative embodiment, the mechanical connection of the heat exchanger (with or without supercooling heat exchanger) with the collecting container via a, preferably welded, holder, which is required for mounting in the engine compartment anyway. The refrigerant-neutral connection continues via a Ubenrittsrohr, which can be flanged or welded on both sides with sealing elements. The design of the holder can be carried out according to the requirements with the least possible use of materials.

In an additional embodiment, the automotive air conditioning system includes a fan, a housing, preferably of plastic, at least one air passage for passing air, wherein the at least one air passage is preferably bounded by at least one wall of the housing, at least one air guide, for example a louver or a roller blind a heating device, for example an electric heater or a heat exchanger through which a coolant flows and / or an air filter.

Fig. 1

einen stark vereinfachten Längsschnitt eines Kältemittelkondensatormoduls in einem ersten Ausführungsbeispiel,

Fig.2

eine erste perspektivische Ansicht einer Grundplatte mit einem Halteteil des Kältemittelkondensatormoduls gemäß Fig. 1,

Fig. 3

einen stark vereinfachten Längsschnittdes Kältemittelkondensatormoduls in einem zweiten Ausführungsbeispiel und

Fig. 4

einen horizontalenSchnitt einer zweiter, mittleren Grundplatte des Kältemittelkondensatormoduls gemäß Fig. 3,

Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings. It shows:

Fig. 1

a highly simplified longitudinal section of a refrigerant condenser module in a first embodiment,

Fig.2

a first perspective view of a base plate with a holding part of the refrigerant condenser module according to Fig. 1 .

Fig. 3

a highly simplified longitudinal section of the refrigerant condenser module in a second embodiment and

Fig. 4

a horizontal section of a second, central base plate of the refrigerant condenser module according to Fig. 3 .

An in Fig. 1 illustrated refrigerant capacitor module 1 comprises a heat exchanger 2 as a condenser, a collecting container 14 and a base plate 21. The heat exchanger 2 is designed in stacked disc design and has a plurality of stacked disks arranged on top of each other 3. At the topmost stacking disc 3 is an upper cover plate 4 and on the bottom stacking disc 3 is a lower cover 5 on. Thus, between the stacking disks 3, a refrigerant passage for passing refrigerant and a coolant passage for passing coolant (not shown) are formed. The stacking disks 3 and the upper and lower shrouds 4, 5 have openings through which the refrigerant and the coolant can flow. Through a refrigerant inlet 6, the refrigerant is directed to the heat exchanger 2 from a compressor, for example a compressor (not shown), and discharged from the heat exchanger 2 to a refrigerant outlet 8 with a refrigerant outlet 9, through a coolant inlet 10 at a coolant inlet port 11 , Coolant is introduced into the heat exchanger 2 and coolant is discharged from the heat exchanger 2 through a coolant outlet 12 at a coolant outlet 13. Gaseous refrigerant is introduced into the heat exchanger 2 at the refrigerant inlet opening 6 and cooled or condensed in the heat exchanger 2 so that liquid refrigerant exits the heat exchanger 2 at the refrigerant outlet opening 8. Heat is transferred from the refrigerant to the coolant transferred in the heat exchanger 2. As a coolant in this case a liquid, namely cooling liquid of a coolant circuit, preferably a low-temperature cooling circuit, an internal combustion engine, not shown, of a motor vehicle, not shown, is used. Within the collecting container 14, hygroscopic material 15 is arranged as a dryer, so that with the hygroscopic material 15, the refrigerant 16 within the collecting container 14 can be dried.

The refrigerant condenser 1 is used for an unillustrated motor vehicle air conditioning system with the refrigerant condenser module 1, an expansion valve, an evaporator and a compressor for forming a refrigeration circuit (not shown). In this case, the motor vehicle air conditioner on a housing within which the evaporator, a heater and a fan are present. The refrigerant condenser module 1 is arranged outside of this housing within an engine compartment of the motor vehicle by means of coolant lines, not shown, while the refrigerant condenser is connected to the compressor and the expansion valve.

The effluent from the heat exchanger 2 refrigerant is through a first refrigerant transfer passage 17, according to, the first embodiment in Fig, 1 is formed by a transfer pipe 18, introduced into the sump 14 From the sump 14, the refrigerant is discharged from a sump refrigerant outlet port 19 to a sump refrigerant outlet port 20. In this case, the heat exchanger 2 and the collecting container 14 are mounted side by side on the base plate 21. The heat exchanger 2 is soldered to the base plate 21 and the collecting container 14 is detachably connected to the base plate 21 with a screw 25.

A holding part 26 as a plate 27 has holes 30 as a fastening means 29. In the holes 30 screws or rivets or clips can be introduced and thereby the holding plate 26 on a motor vehicle, for example, the body of the motor vehicle, are attached. Here, the holding part 26 and the base plate 21 is integrally formed as a component ( Fig. 2 ). The base plate 21 and the holding part 26 are connected to each other by means of a bend 28.

The heat exchanger 2, the collecting container 14 and the base plate 21 consist essentially of aluminum, copper or steel.

ln 3 and 4 a second embodiment of the refrigerant condenser module 1 is shown. In the following, essentially only the differences from the first embodiment will be according to FIG Fig. 1 described. The refrigerant condenser module 1 comprises a first uppermost base plate 22, a second middle base plate 23 and a lower, third base plate 24. The three base plates 22, 23 and 24 are connected to one another by means of soldering. At the middle base plate 23, two slots 33 are formed. Furthermore, the first, uppermost base plate 22 has an opening at the refrigerant outlet opening 8 of the heat exchanger 2, so that the refrigerant flowing out of the heat exchanger 2 at the refrigerant outlet opening 8 can flow through this opening on the first base plate 22 into the first refrigerant transfer channel 17 which extends between the first and third base plates 22, 24 forms on the slot 33. Through this first refrigerant transfer channel 17 (FIG. Fig. 3, 4 ), the refrigerant flows into the sump 14 through a sump refrigerant inlet port 34. The second base plate 23 is also provided with a further slot 33. The further slot 33 is in Fig. 4 shown below and due to the sectioning in Fig. 3 not visible. This second slot 33 forms between the first and second base plates 22, 24 from a second refrigerant transfer passage 32 from. From the sump refrigerant outlet port 19, the refrigerant flows out of the sump 14 and is passed through the second refrigerant transfer passage 32 to a subcool heat exchanger 31.

The supercooling heat exchanger 31 is designed in an analogous manner as the heat exchanger 2 in stacking disk construction with stacking disks 3. The coolant flows through a coolant inlet opening 10 at a coolant inlet port 11 into the sub-cooling heat exchanger 31. After flowing through the supercooled heat exchanger 31, the coolant is introduced into the heat exchanger 2 through an opening in each of the three base plates 22, 23, 24 and flows out of it from the coolant outlet opening 12 again. The discharged through the second refrigerant transfer passage 32 from the sump 14 refrigerant is at a not in Fig. 3 introduced refrigerant inlet 6 of the supercooled heat exchanger 31 introduced into the supercooled heat exchanger 31, further cooled in the supercooling heat exchanger 31 below a saturation temperature and exits at the refrigerant outlet 8 again from the supercooled heat exchanger 31. At the refrigerant outlet 9 of the Unterkülwärmeübertragers 31, the escaping refrigerant is passed through a refrigerant line, not shown, to an expansion valve of the motor vehicle air conditioning system, not shown.

In the second refrigerant transfer passage 32 between the first and third base plates 22, 24 thus opens the sump refrigerant outlet 19, through which the refrigerant is introduced into the second refrigerant transfer passage 32 and through an opening into the second refrigerant transfer passage 32 supercooled heat exchanger refrigerant inlet port 35, the refrigerant flows into the subcooled heat exchanger 31.

At the in Fig. 3 illustrated second embodiment of the refrigerant condenser module 1, the middle base plate 23, the holding part 26, that is, the holding part 26 and the central base plate 23 are integrally formed as a component. At the first and third base plate 22, 24 no holding part 26 is present.

In a further embodiment, not shown, the refrigerant condenser module 1 is as in Fig. 3 dargstellte second embodiment, however, formed without the supercooling heat exchanger. 1

In an additional, not shown embodiment of the refrigerant condenser module 1 are arranged on three superimposed base plates 22, 23 and 24 at the top of the first base plate 22 according to the second embodiment of the heat exchanger 2 and according to the second embodiment on the third base plate 24 below the supercooling heat exchanger 31 , This ends in this embodiment, not shown, in contrast to the embodiment according to Fig. 3 , the collecting container 14 at the bottom not on the first base plate 22, but in the region of the lower end of the supercooled heat exchanger 31. For this purpose, the sump 14 is either peripherally connected to the three base plates 22, 23 and 24 or the three base plates 22, 23, 24 are partial arranged in a recess of the collecting container 14 and thus connected to the collecting container 14,

In an additional, not shown embodiment, the refrigerant condenser module 1 comprises two base plates, wherein the refrigerant transfer channels are formed by a deformed base plate. In one additional embodiment, not shown, a supercooling heat exchanger without a condenser is formed, wherein the base plate is attached to the supercooling heat exchanger and the entry into the collecting tank is effected by a transfer channel in the supercooling heat exchanger.

Overall, significant advantages are associated with the refrigerant condenser module 1 according to the invention. The heat exchanger 2 is designed in stacked disc design and the stacking disks 3 are connected to each other with soldering. In this case, the heat exchanger 2 and the collecting container 14 may be connected to at least one base plate 21 by a solder joint, so that in a simple manner with only a single Herstellungsschrit both the sump 14 and the heat exchanger 2 can be connected to the base plate 21 by soldering, In this case, when using two base plates 21, the required first and optional second refrigerant transfer channels 17, 32 can also be produced during integration into at least two base plates 21 by soldering the at least two base plates 21 to one another in the same production step. The holding part 26 is made as a single component of the base plate 21, so that no additional manufacturing steps are required for the production of the holding part 26 after soldering the at least one base plate 21 of the heat exchanger 2 and the collecting container 14 and the optional supercooled heat exchanger 31 in a brazing furnace.

LIST OF REFERENCE NUMBERS

1

Kältermittelkondensatormodul

2

Heat exchanger

3

The stacked-plate

4

Upper cover plate

5

Lower cover plate

6

Refrigerant inlet port

7

Refrigerant inlet port

8th

refrigerant outlet port

9

Kältemittelauslassstutzen

10

Coolant inlet port

11

Coolant inlet port

12

coolant outlet

13

Kühlmittelauslassstutzen

14

Clippings

15

Hygroscopic material

16

refrigerant

17

First refrigerant transfer channel

18

Transfer pipe

19

Collecting-refrigerant outlet port

20

Header Kältemittelauslassstutzen

21

baseplate

22

First base plate

23

Second middle base plate

24

Third base plate

25

screw

26

holding part

27

plate

28

bend

29

fastener

30

drilling

31

Supercooling heat exchanger

32

Second refrigerant transfer channel

33

Slot in second, middle base plate

34

Collecting refrigerant inlet port

35

Under cooling heat exchanger refrigerant inlet port

Claims (10)

Refrigerant condenser module (1) for condensing refrigerant for an automotive air conditioning system, comprising - A heat exchanger (2) as a condenser with a refrigerant inlet port (6), a refrigerant outlet (8), a Kühlmitteleinlassöfnung (10) and a Kühlmittelauslassöffnung (12), wherein the heat exchanger (2) has a refrigerant passage and a coolant passage for passing refrigerant through the refrigerant passage and coolant through the coolant passage for transferring heat from the refrigerant to the coolant, a collecting container (14) for the refrigerant, a first refrigerant transfer channel (17) for conducting the refrigerant from the heat exchanger (2) into the collecting container (14), a sump refrigerant outlet port (19) formed on the sump (14) for discharging the refrigerant from the sump (14), characterized in that
the heat exchanger (2) and the collecting container (14) with at least one base plate (21) are mechanically interconnected. Refrigerant condenser module according to claim 1,
characterized in that the at least one base plate (21) having at least one holding part (26) for fixing the refrigerant condenser module (1) on a motor vehicle, in particular a body of the motor vehicle is provided. Refrigerant condenser module according to claim 2,
characterized in that
the holding part (26) and a base plate (21) are integrally formed and / or
the holding part (26) and the base plate (21) with a bend (28), z. B. with a Kröpfungswinkel of substantially 90 °, are interconnected
and or
the holding part (26) at least one fastening means (29), z. B. has a bore, a screw, a rivet or a hook, and / or
the holding part (26) is designed as at least one plate, at least one web or at least one rod. Refrigerant condenser module according to one or more of the preceding claims,
characterized in that
at a mounting of the refrigerant condenser module (1) on the motor vehicle, the at least one base plate (21) substantially oriented horizontally or vertically. Refrigerant condenser module according to one or more of the preceding claims,
characterized in that
the collecting container (14) and / or the heat exchanger (2) is arranged and / or fixed to an upper side or a lower side of the base plate (21)
and or
the collecting container (14) and the heat exchanger (2) are arranged side by side. Refrigerant condenser module according to one or more of the preceding claims,
characterized in that
the refrigerant condenser module (1) comprises a subcooled heat exchanger (31) for cooling the refrigerant with the coolant and a second refrigerant transfer passage (32) for conducting the refrigerant from the sump (14) to the subcool heat exchanger (31). Refrigerant condenser module according to one or more of the preceding claims,
characterized in that the heat exchanger (2) and / or the supercooling heat exchanger (31) are designed in stacking disk construction and preferably stacking disks (3) of the heat exchanger and / or the supercooled heat exchanger (31) are soldered together. Refrigerant condenser module according to one or more of the preceding claims,
characterized in that
the heat exchanger (2) and / or the supercooling heat exchanger (31) is soldered to at least one base plate (21) and / or
the heat exchanger (2) and / or the supercooling heat exchanger (31) is detachably connected to the at least one base plate (21), for example with a screw or rivet connection (25). Refrigerant condenser module according to one or more of the preceding claims,
characterized in that
the collecting container (14) on at least one base plate (21) releasably, for. B. with a screw or rivet connection (25) is attached or the collecting container (14) is soldered to at least one base plate (21)
and or
the first and / or second refrigerant transfer duct (17, 32) is formed with a transfer pipe (18) and / or integrated into at least two base plates (21), in particular two or three base plates (21) is
and or
within the collecting container (14) hygroscopic material is arranged as a dryer and / or a filter
and or
the coolant is a liquid. Automotive air conditioning system with a refrigerant condenser module (1), an expansion valve, an evaporator and a compressor to form a refrigeration circuit,
characterized in that
the refrigerant condenser module (1) is designed as a refrigerant condenser module (1) according to one or more of the preceding claims.

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