DE102019132955B4 - Heat exchanger with integrated dryer and plate for a plate heat exchanger - Google Patents

Abstract

Heat exchanger (1) comprising a dryer (10) and a water-cooled condenser (12), the condenser (12) comprising a plurality of plates (8) and two end plates (25), characterized in that the dryer (10) in the Capacitor (12) is integrated, the plates (8) have an opening (9), the opening (9) being designed such that when a plurality of plates (8) are arranged side by side, the openings (9) in the plates (8) form a cavity, and/or at least one of the end plates (25) has a cavity, the cavity being suitable for accommodating a dryer (10) and/or a desiccant (11), wherein if at least one of the end plates ( 25) has a cavity, the cavity being connected to the refrigerant circuit by a coupling block (37), and an electronic component for heating or cooling being arranged in the opening (9).

Description

The invention relates to a plate heat exchanger, comprising a dryer and a water-cooled condenser, the condenser comprising a multiplicity of plates and two end plates, possibly with an integrated receiver.

Furthermore, the invention relates to a plate for a plate heat exchanger with an opening and its use.

Plate heat exchangers (plate heat exchangers) are a special design of a heat exchanger consisting of plates that are assembled in such a way that the medium to be heated and then the heat-emitting medium flows in the successive spaces. The plate pack is sealed to the outside and between the media.

Water-cooled condensers are nowadays manufactured in a plate-plate or plate-fin design. Due to the design of water-cooled condensers, desiccant is charged and stored in a separate external refrigerant receiver dryer vessel.

In known condensers, these external receiver-dryer tanks are located outside of the condenser, as a receiver/dryer bottle.

From the FR3001795 B1 a plate heat exchanger for an air conditioning circuit is known, in which a plurality of plates, which are arranged between two end plates, are connected to one another. The plate heat exchanger has a cylindrical receiver-dryer placed (externally) on one of the two end plates, as in 1 shown.

In the KR 10 2012 0 072 157 A a plate heat exchanger is described.

In the FR 2 947 041 A1 a condenser with refrigerant reserve for an air conditioning circuit is described.

In the DE 10 2012 113 120 A1 describes a condenser, particularly for a vehicle, to which a water-cooling type is applied, in which a refrigerant is condensed through heat exchange with a cooling fluid.

From the DE 10 2012 217 087 A1 discloses a stacked condenser having a first flow channel for a refrigerant and a second flow channel for a coolant.

A dryer located externally on one of the end plates has the disadvantage of increasing the dimensions of the water-cooled condenser assembly. In addition, when using a receiver dryer bottle, as a dryer, connection pipes or a connection block are required. In addition, screw-on receiver dryer bottles sometimes require an additional assembly process.

The object of the invention is to provide a heat exchanger that has smaller dimensions and can be produced inexpensively.

The object of the present invention is achieved by a plate heat exchanger of the type mentioned in which the receiver dryer is integrated into the condenser, the plates have an opening, the opening being designed such that when a large number of plates are arranged next to one another, the Openings in the plates form a cavity, and/or at least one of the end plates has a cavity, the cavity being suitable for accommodating a drier and/or a desiccant. Such an embodiment, in which the collector dryer or the receiver dryer bottle is arranged in the inner part of the condenser, has comparatively smaller dimensions of the condenser, which is particularly advantageous when the heat exchanger is installed in a motor vehicle.

In addition, in an embodiment in which the receiver dryer is arranged in the inner part of the condenser, the manufacture of the heat exchanger is simplified and the cost of the heat dryer is also reduced.

A further advantage of such an embodiment is that the dimensions are reduced compared to a design in which a receiver dryer bottle is mounted externally to the condenser. In addition, additional components such as connecting pipes or a connecting block with which the receiver dryer bottle is connected to the condenser can be dispensed with.

The interior of the condenser is preferably formed by brazing, such as vacuum brazing, in a plate-to-plate or plate (cooling) fin configuration, the condenser having refrigerant-carrying layers (refrigerant channels) and water-carrying layers (water channels).

The dryer preferably has at least one dryer opening, wherein the at least one dryer opening is designed such that the Dryer opening is connected to the refrigerant-carrying layer or one or more of the refrigerant channels, so that refrigerant can be routed into the dryer. This makes it possible for the refrigerant to flow through the drying agent arranged in the cavity, or to be in physical contact with it and bind the liquid. The desiccant does not necessarily have to be flown through, an opening with the possibility of diffusion is sufficient. The drying agent attracts the moisture, in which case water from the heat-absorbing or heat-emitting medium does not flow through the dryer. For this purpose, the cavity formed by the plates is connected via the at least one dryer opening to the space of the condenser that is filled with refrigerant.

The at least one dryer opening is preferably arranged in one or more of the refrigerant-carrying layers of the condenser or is connected to one or more of the refrigerant channels.

The dryer can preferably be closed (reversibly) with a filter closure which comprises a filter with a sealing ring. Such a design enables the desiccant located in the cavity/dryer to be introduced or replaced.

The opening in the plate is preferably located in the center of the plate area defined by the plate. However, embodiments of the plate are also conceivable in which the opening is not arranged in the center of the plate.

In a further preferred embodiment of the invention, in which at least one of the end plates has a cavity, the cavity is connected to the refrigerant circuit with a coupling block. Such an embodiment has a narrow design that allows the dryer to be replaced quickly by changing an end plate.

The coupling block is preferably connected to the end plate by a flange, suitably a sealing ring being arranged between the flange and the end plate. The sealing concepts known in the vehicle industry, such as single, double O-ring, metal seal fitting, are used.

Furthermore, the object of the present invention is achieved by a plate for a plate heat exchanger with an opening, the opening being designed in such a way that when a plurality of plates are arranged next to one another, the openings in the plates form a cavity.

Furthermore, the object of the present invention is achieved by using a plate according to the invention in a condenser of a plate heat exchanger.

• 1 einen Plattenwärmeübertrager für einen Klimaanlagenkreislauf mit einem externen Sammeltrockner, wie er aus dem Stand der Technik bekannt ist,
• 2 eine erfindungsgemäße Platte mit einer runden Öffnung,
• 3 eine erfindungsgemäße Platte mit einer ovalen Öffnung,
• 4a-c eine erfindungsgemäße Platte und ein durch Übereinanderschichten der Platten gebildeter Hohlraum/Trockner,
• 5 eine schematische Darstellung eines im Innenteil eines Kondensators angeordneten Hohlraums/Trockners,
• 6a-h schematische Darstellungen eines Querschnitts durch wassergekühlte Kondensatoren mit integriertem Trockner,
• 7a-c schematische Darstellungen wassergekühlter Kondensatoren mit integriertem Trockner und
• 8 einen Querschnitt durch eine schematische Darstellung einer zweiten Ausführungsform der Erfindung.

Further details, features and advantages of configurations of the invention result from the following description of exemplary embodiments with reference to the associated figures. In detail shows:

• 1 a plate heat exchanger for an air conditioning circuit with an external collecting dryer, as is known from the prior art,
• 2 a plate according to the invention with a round opening,
• 3 a plate according to the invention with an oval opening,
• 4a-c a panel according to the invention and a cavity/drier formed by stacking the panels,
• 5 a schematic representation of a cavity/drier arranged in the inner part of a condenser,
• 6a-h schematic representations of a cross section through water-cooled condensers with integrated dryer,
• 7a-c schematic representations of water-cooled condensers with integrated dryer and
• 8th a cross section through a schematic representation of a second embodiment of the invention.

the 1 shows a plate heat exchanger 1, as is known from the prior art, with an externally arranged receiver dryer bottle as a receiver - refrigerant collection bottle/dryer container 2.

The plate heat exchanger 1 includes a condenser 3 which is formed by a plurality of plates 4 and two end plates 5 . At the corners of the plates 5 there are openings 7 for introducing or discharging the water and the refrigerant.

The receiver dryer bottle 2 is connected to the condenser 3 on the refrigerant side via a connection block 6 or connection pipes.

the 2 and 3 FIG. 1 shows plates 8 with an opening 9 which is designed in such a way that when a plurality of plates 8 are arranged next to one another or one on top of the other, the openings 9 form a cavity which can be filled with a drier 10 and a desiccant 11 in a desiccant bag, thus serving as a receiver-drier 10 for the condenser 12.

In the in the 2 shown embodiment of the plate 8, the opening 9 is round and in the 3 embodiment shown oval. However, the opening 9 can also have a different shape, for example angular, and can be arranged at a different point in the plate 8 .

The plates 8 have further openings 13 . In a condenser 12 made from the plates 8, the refrigerant or the water flows through these openings 13.

the 4a shows a three-dimensional representation of a plate 8 with an opening 9 and four openings 13.

the 4b shows a section of the 4a shown plate 8 with the opening 9.

the 4c shows several plates 8 stacked one on top of the other, which together form the inner part 30 of a capacitor 12 .

Due to the plates 8 stacked on top of one another, a cavity is formed at the point where the openings 9 are located in the middle of the condenser 12, which cavity is filled with a desiccant 11 or in which a collector-dryer 10 is arranged. The brazed surface 14 of the dryer 10 forms the bond between the container and the plates 8.

The dryer 10 has one or more dryer openings 15, shown in FIG 5 .

the 5 and 6 show an embodiment and are described together below.

the 5 shows a section of a schematic representation of the connection between the dryer 10 and the refrigerant circuit of a water-cooled condenser 12. The dryer 10 is suitably designed as an aluminum cartridge/bottle and is connected to the plates 8 of the condenser 12 by brazing. The cartridge or bottle is suitably made from an extruded aluminum profile with internal thread and sealing surface for stoppers and filters with sealing O-rings. Such an embodiment with plugs and sealing O-rings is maintenance-friendly during desiccant replacement. The cavity filled with desiccant 11 contains the pressure with which this cavity is connected in the plate heat exchanger.

The drying agent 11 is suitably placed in a bag in the dryer 10 and the dryer 10 is then fitted with the filter closure 24 according to FIG 6g and 6h locked.

The dryer 10 is constructed as a tank passing through the interior portion 30 of the condenser 12, at the center of the plates 8.

The water-cooled condenser 12 with the dryer bottle integrated into the inner part (core) 30 is manufactured by one-shot brazing, so that no additional assembly step for the assembly of an external dryer vessel or an external dryer bottle is required.

The refrigerant channels 16 and the water channels 17 run between the plates 8.

The dryer 10 makes it possible through its at least one dryer opening 15, which at the same time forms an open channel 23, that refrigerant can flow through the container of the dryer 10 or is connected to it. The refrigerant flows through the dryer 10 or the desiccant 11, shown with reference numeral 21. The dryer 10, dryer container, can be connected through one or more dryer openings 15 to the refrigerant channels 16 in the condensing section 18 and/or the inlet section 19 and/or the sub-cooling section 20. However, the dryer 10 is closed to the water channels 17 (closed channel 22).

The inlet section 19 is designed as an area in the inner part 30 of the condenser 12, which means that several consecutive plates 8 create a space for the refrigerant.

Because the desiccant 11 is connected to the refrigerant circuit, the desiccant 11 can draw moisture out of the system.

With water-cooled condensers 12 it is important that the receiver dryer 10 is fully integrated into the heat transfer plates 8 of the plate heat exchanger 1. Depending on the design, the integrated dryer 10 can be in the sub-cooling section 20 (sub-cooling area), in the integrated collection container or in the inlet section 19, in the last condensation plates, end plates 25, or in a combination of other possible embodiments, depending on the design and the flow pattern, in the water-cooled Capacitor 12, be arranged.

The design of the heat exchanger with the input section can be different for all water condenser designs Section combinations are employed as in the 6a until 6h shown.

In the 6a until 6h a cross section through a water-cooled condenser 12 with an integrated dryer 10 comprising a refrigerant inlet opening 26, a refrigerant outlet opening 27, a water inlet opening 28 and water outlet opening 29 is shown.

the 6a shows a cross section through a water-cooled condenser 12 with an integrated dryer 10 with a condensing section 18.

the 6b shows a cross-section through a water-cooled condenser 12 with a sub-cooling section 20.

the 6c shows a cross section through a water-cooled condenser 12 with an inlet section 19.

the 6d shows a cross section through a water-cooled condenser 12 with an inlet section 19 and a condensing section 18.

the 6e shows a cross section through a water-cooled condenser 12 with an inlet section 19 and a sub-cooling section 20.

the 6f shows a cross section through a water-cooled condenser 12 with a sub-cooling section 20 and a condensing section 18.

the 6g and 6h 12 shows a cross-section through a water-cooled condenser 12 having an inner part (core) 30 comprising an inlet section 19, a sub-cooling section 20 and a condensing section 18. FIG. The integrated dryer 10 with the desiccant 11 is closed with a filter closure 24, comprising a plug with filter and seal, shown as a block with seal 31.

The one in the 6h The embodiment shown of the water-cooled condenser 12 has an additional inner tube 32 in which the refrigerant can bypass the sub-cooling section 18 .

In the 6g and 6h For example, the connection with the dryer 10 (tank) is shown by dots that show how the refrigerant flows through the dryer 10, namely by the refrigerant according to the embodiment of FIG 5 flows through the refrigerant channels 16, through at least one dryer opening 15 flows through the container. The water channels 17 are not connected to the dryer 10 .

The in the 6a until 6h The arrows drawn in show the direction of flow of the refrigerant and the water in the condenser 12.

The technology with an integrated entrance as the entrance section 19 can be used for all other plate heat exchanger 1 with integrated collector dryer 10 in the 7a until 7c are shown. The in the 7a until 7c The embodiments shown have two water inlet openings 40, 44 and two water outlet openings 41, 45 as well as two refrigerant inlet openings 42, 46 and two refrigerant outlet openings 43, 47.

the 7a shows a plate heat exchanger 1, which combines a water-cooled condenser 12 and an integrated heat exchanger 33.

the 7b shows a plate heat exchanger 1, which combines a water-cooled condenser 12, an integrated heat exchanger 33 and an evaporator 34.

the 7c shows a plate heat exchanger 1, which combines a water-cooled condenser 12, an integrated heat exchanger 33, an evaporator 34 and any further refrigerant and coolant heat exchanger 35.

In the 8th 1 is shown a cross section through a second embodiment of the invention having an inner part 30 in which the receiver dryer is integrated into an end plate 25 of a water-cooled condenser 12.

The end plate 25 has a cavity in its interior that is used to hold the desiccant, so that the end plate 25 becomes a desiccant container that is integrated into the condenser 12 in a flat and space-saving manner.

The end plate 25 does not have the full length of the other plates 8, but is shorter than the plates 8 that form the capacitor 12.

The end plate 25 is connected to a coupling block 37 via a flange 36, the end plate 25 and the coupling block 37 together having the same dimensions as a plate 8 and thus being connected to one another in a space-saving manner.

The coupling block 37 has an additional side outlet through which the refrigerant flows. About the coupling block 37 is in the End plate 25 located desiccant in contact with at least one refrigerant channel.

To secure the flange 36 and the coupling block 37 are screwed together according to the illustrated embodiment via bolts and nuts 38 with a thread. A seal 39 is located between the flange 36 and the coupling block 37 for sealing purposes.

This type of opening can also be used as a heating/cooling section of an electronic component inserted into the cavity. This technology can also be used with water/water or water/oil or water/air or multi-fluid heat exchangers (more than two).

Reference List

1

plate heat exchanger

2

receiver dryer bottle

3

capacitor

4

plate, heat transfer plate

5

endplate

6

connection block

7

opening

8th

plate, heat transfer plate

9

opening

10

[integrated] collector dryer

11

desiccant

12

capacitor

13

opening

14

surface (of the container/dryer)

15

dryer opening

16

Refrigerant duct, refrigerant-carrying layer

17

aquifer, aquifer

18

condensing section

19

entrance section

20

subcooling section

21

the refrigerant flows through the dryer 10 or the desiccant 11

22

closed channel

23

open channel (dryer opening)

24

Filter cap (plug with seal, e.g. O-ring)

25

endplate

26

refrigerant inlet opening

27

refrigerant outlet opening

28

water inlet

29

water outlet

30

inner part, core

31

Block (with seal), seal block

32

tube

33

integrated heat exchanger

34

evaporator

35

Refrigerant and coolant heat exchanger

36

flange

37

Coupling block (with additional side exit)

38

Bolt (threaded) and nut

39

poetry

40

first water inlet opening

41

first water outlet opening

42

first refrigerant inlet opening

43

first refrigerant outlet opening

44

second water inlet opening

45

second water outlet opening

46

second refrigerant inlet opening

47

second refrigerant outlet opening

Claims (9)

Heat exchanger (1) comprising a dryer (10) and a water-cooled condenser (12), the condenser (12) comprising a plurality of plates (8) and two end plates (25), characterized in that the dryer (10) in the capacitor (12) is integrated, the plates (8) have an opening (9), the opening (9) being designed such that when a plurality of plates (8) are arranged side by side, the openings (9) in the Plates (8) form a cavity, and/or at least one of the end plates (25) has a cavity, the cavity being suitable for accommodating a dryer (10) and/or a desiccant (11), wherein if at least one of the end plates (25) has a cavity, the cavity being connected to the refrigerant circuit by a coupling block (37), and an electronic component for heating or cooling being arranged in the opening (9). Heat exchanger (1) after claim 1 , characterized in that the inner portion (30) of the condenser (12) is formed by brazing in a plate-to-plate or plate (cooling) fin configuration, the condenser (12) having refrigerant-carrying layers (16) and water-carrying layers (17). Heat exchanger (1) after claim 1 or 2 , characterized in that the dryer (10) has at least one dryer opening (15), wherein the at least one dryer opening (15) is formed such that the dryer opening (15) is connected to the refrigerant-carrying layer (16). Heat exchanger (1) after claim 3 , characterized in that the at least one dryer opening (15) is arranged in one or more of the refrigerant-carrying layers (16) of the condenser (12). Heat exchanger (1) according to one of Claims 1 until 4 , characterized in that the dryer (10) can be closed by a filter closure (24). Heat exchanger (1) according to one of Claims 1 until 5 , characterized in that the opening (9) in the plate (8) is arranged in the center of the area formed by the plate (8). Heat exchanger (1) according to one of Claims 1 until 6 , characterized in that the coupling block (37) is connected to the end plate (25) via a flange (36). Plate (8) for a plate heat exchanger (1) with an opening (9), the opening (9) being designed in such a way that when a plurality of plates (8) are arranged next to one another, the openings (9) in the plates (8 ) form a cavity and wherein an electronic component for heating or cooling is arranged in the opening (9). Use of a plate (8) according to claim 8 in a heat exchanger (1).

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