DE102019132955A1 - Heat exchanger with integrated dryer and plate for a plate heat exchanger - Google Patents

Abstract

The invention relates to a 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), in which the dryer (10 ) is integrated into the capacitor (12), the plates (8) have an opening (9), the opening (9) being designed such that when a plurality of plates (8) are arranged next to one another, the openings (9) Form a cavity in the plates (8) and / or at least one of the end plates (25) has a cavity, the cavity being suitable for receiving a dryer (10) and / or a drying agent (11).

Description

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

The invention also 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 that consist of plates that are composed in such a way that the medium to be heated up and then the heat-emitting medium flows in the successive interspaces. The plate pack is sealed to the outside and between the media.

Nowadays, water-cooled condensers are manufactured in a plate-to-plate or plate-to-fin design. Due to the design of water-cooled condensers, desiccant is brought into a separate external refrigerant receiver-dryer container and stored there.

In known condensers, these external collector-dryer containers are arranged outside the condenser, as a receiving / drying 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 which is arranged (externally) on one of the two end plates, as in FIG 1 shown.

A dryer arranged externally on one of the end plates has the disadvantage that the dimensions of the water-cooled condenser assembly are increased. In addition, if a receiver dryer bottle is used as a dryer, connection pipes or a connection block are required. In addition, screw-on receiver drier bottles sometimes require an additional assembly process.

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

The object of the present invention is achieved by a plate heat exchanger of the type mentioned at the outset, in which the collector dryer is integrated into the condenser, the plates have an opening, the opening being designed such that when a plurality 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 receiving a dryer 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 a comparatively smaller dimension 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 collector dryer is arranged in the inner part of the condenser, the manufacture of the heat exchanger is simplified and the costs of the heat dryer are thus also reduced.

Another advantage of such an embodiment is that the dimensions are smaller compared to a design in which a receiver dryer bottle is attached externally to the condenser. In addition, there is no need for additional components, such as connecting pipes or a connecting block with which the receiver dryer bottle is connected to the condenser.

The inner part of the condenser is preferably formed by brazing, such as vacuum brazing, in a plate-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, the at least one dryer opening being 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 conducted into the dryer. This enables the refrigerant to flow through the desiccant arranged in the cavity, or to be in material contact with it and to bind the liquid. The desiccant does not necessarily have to be flowed through; an opening with a diffusion option is sufficient. The desiccant 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 to the space of the condenser, which is filled with refrigerant, via the at least one dryer opening.

The at least one dryer opening is preferably arranged in one or more of the coolant-carrying layers of the condenser or is connected to one or more of the coolant 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 arranged in the center of the plate surface formed 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 by means of a coupling block. Such an embodiment has a narrow design, which enables the dryer to be changed quickly by changing an end plate.

The coupling block is preferably connected to the end plate via a flange, a sealing ring being suitably arranged between the flange and the end plate. The sealing concepts known in the vehicle industry, such as single, double O-ring and 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 such 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 embodiments of the invention emerge 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,
• 3rd a plate according to the invention with an oval opening,
• 4a-c a plate according to the invention and a cavity / dryer formed by stacking the plates,
• 5 a schematic representation of a cavity / dryer 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 collecting dryer bottle as a receiver - refrigerant collecting bottle / dryer container 2 .

The plate heat exchanger 1 includes a capacitor 3rd passing through a variety of panels 4th and two end plates 5 is formed. At the corners of the panels 5 are openings 7th arranged for introducing and discharging the water and the refrigerant.

The receiving dryer bottle 2 is via a connection block 6th or connecting pipes to the condenser 3rd connected to the refrigerant side.

The 2 and 3rd show panels 8th with an opening 9 which is designed such that when a plurality of plates 8th are arranged side by side or one above the other, the openings 9 Form a cavity with a dryer 10 and a desiccant 11 Can be filled in a desiccant bag, and so can be used as a collector dryer 10 for the capacitor 12th serves.

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

The plates 8th have further openings 13th on. In one of the plates 8th manufactured capacitor 12th flows through these openings 13th the refrigerant or the water.

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

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

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

Because of the plates stacked on top of each other 8th forms at the point where the openings are 9 located in the middle of the capacitor 12th a cavity filled with a desiccant 11 is filled or in which a collector dryer 10 is arranged. The brazed surface 14th of the dryer 10 forms the connection between the container and the plates 8th .

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

The 5 and 6th show an exemplary embodiment and are described jointly 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 12th . The dryer is suitable 10 designed as an aluminum cartridge / bottle and is brazed to the plates 8th of the capacitor 12th connected. The cartridge or bottle is suitably made from an extruded aluminum profile with an internal thread and a sealing surface for stoppers and filters with sealing O-rings. Such an embodiment with plugs and sealing O-rings is easy to maintain when the drying agent is exchanged. In the one with desiccant 11 filled cavity is the pressure with which this cavity is connected in the plate heat exchanger.

The desiccant 11 is conveniently placed in a bag in the dryer 10 brought in and the dryer 10 then with the filter cap 24 according to the 6g and 6h locked.

The dryer 10 is constructed as a container through the inner part 30th of the capacitor 12th , in the middle of the panels 8th , leads.

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

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

The dryer 10 makes it possible through its at least one dryer opening 15th that are simultaneously an open channel 23 that refrigerant forms through the container of the dryer 10 can flow or is connected to it. The refrigerant flows through the dryer 10 or the desiccant 11 , shown with reference numerals 21 . The dryer 10 , Dryer container, can be through one or more dryer openings 15th with the refrigerant channels 16 in the condensing section 18th and / or entrance section 19th and / or subcooling section 20th be connected. The dryer 10 however, is for the water channels 17th closed (closed channel 22nd ).

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

By having the desiccant 11 is connected to the refrigerant circuit, the desiccant can 11 Draw moisture out of the system.

With water-cooled condensers 12th it is important that the collector dryer 10 completely into the heat transfer plates 8th of the plate heat exchanger 1 is integrated. Depending on the version, the integrated dryer 10 in the subcooling section 20th (Subcooling area), in the integrated collecting container or in the entrance section 19th , in the last condensation plates, end plates 25th , or in a combination of possible further embodiments, depending on the design and the flow path, in the water-cooled condenser 12th , be arranged.

The design of the heat exchanger with inlet section can be used in all water condenser designs with different section combinations, as in FIG 6a to 6h shown.

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

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

The 6b shows a cross section through a water-cooled condenser 12th with a subcooling section 20th .

The 6c shows a cross section through a water-cooled condenser 12th with an entrance section 19th .

The 6d shows a cross section through a water-cooled condenser 12th with an entrance section 19th and a condensing section 18th .

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

The 6f shows a cross section through a water-cooled condenser 12th with a subcooling section 20th and a condensing section 18th .

The 6g and 6h show a cross section through a water-cooled condenser 12th with an inner part (core) 30th , which has an entrance section 19th , a subcooling section 20th and a condensing section 18th includes. The integrated dryer 10 with the desiccant 11 is with a filter cap 24 , comprising a plug with filter and seal, closed, shown as a block with seal 31 .

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

In the 6g and 6h is an example of the connection with the dryer 10 (Container) represented by dots that make it clear how the refrigerant enters the dryer 10 flooded, namely by the refrigerant according to the embodiment according to 5 through the refrigerant channels 16 flows through at least one dryer opening 15th flows through the container. The water channels 17th have no connection with the dryer 10 on.

The ones in the 6a to 6h The arrows shown show the direction of flow of the refrigerant and the water in the condenser 12th .

The technology with an integrated entrance as an entrance section 19th can be used for all other plate heat exchangers 1 with integrated collector dryer 10 used in the 7a to 7c are shown. The ones in the 7a to 7c The embodiments shown have two water inlet openings 40 , 44 and two water outlets 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 having a water-cooled condenser 12th and an integrated heat exchanger 33 combined.

The 7b shows a plate heat exchanger 1 having a water-cooled condenser 12th , an integrated heat exchanger 33 and an evaporator 34 combined.

The 7c shows a plate heat exchanger 1 having a water-cooled condenser 12th , an integrated heat exchanger 33 , an evaporator 34 and any other refrigerant and coolant heat exchanger 35 combined.

In the 8th Figure 3 is a cross section through a second embodiment of the invention with an inner part 30th shown with the collector dryer in an end plate 25th a water-cooled condenser 12th is integrated.

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

The end plate 25th does not show the full length of the other panels 8th on but is shorter than the panels 8th who have favourited the capacitor 12th form.

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

The coupling block 37 has an additional side outlet through which the refrigerant flows. Via the coupling block 37 it says in the end plate 25th Desiccant located in contact with at least one refrigerant channel.

To secure are the flange 36 and the coupling block 37 according to the illustrated embodiment with each other via bolts with threads and nuts 38 screwed. For sealing is located between the flange 36 and coupling block 37 a seal 39 .

This type of opening can also be used as a section for heating / cooling an electronic component which is 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).

List of reference symbols

1

Plate heat exchanger

2

Receiving dryer bottle

3

capacitor

4th

Plate, heat transfer plate

5

End plate

6th

Connection block

7th

opening

8th

Plate, heat transfer plate

9

opening

10

[integrated] collector dryer

11

Desiccant

12th

capacitor

13th

opening

14th

Surface (of the container / dryer)

15th

Dryer opening

16

Refrigerant channel, refrigerant-carrying layer

17th

Water channel, water-bearing layer

18th

Condensing section

19th

Entrance section

20th

Subcooling section

21

the refrigerant flows through the dryer 10 or the desiccant 11

22nd

closed channel

23

open channel (dryer opening)

24

Filter closure (stopper with seal, e.g. O-ring)

25th

End plate

26th

Refrigerant inlet opening

27

Refrigerant outlet opening

28

Water inlet

29

Water outlet

30th

Inner part, core

31

Block (with seal), sealing block

32

tube

33

integrated heat exchanger

34

Evaporator

35

Refrigerant and coolant heat exchangers

36

flange

37

Coupling block (with additional side exit)

38

Bolt (with thread) 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

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• FR 3001795 B1 [0006]

Claims (11)

Heat exchanger (1), comprising a dryer (10) and a water-cooled condenser (12), wherein the condenser (12) comprises 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 receiving a dryer (10) and / or a drying agent (11). Heat exchanger (1) Claim 1 , characterized in that the inner part (30) of the capacitor (12) is formed by brazing in a plate-plate or plate (cooling) fin configuration, the capacitor (12) refrigerant-carrying layers (16) and water-carrying layers (17). Heat exchanger (1) Claim 1 or 2 , characterized in that the dryer (10) has at least one dryer opening (15), the at least one dryer opening (15) being designed such that the dryer opening (15) is connected to the refrigerant-carrying layer (16). Heat exchanger (1) 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) after one of the Claims 1 to 4th , characterized in that the dryer (10) can be closed by a filter closure (24). Heat exchanger (1) after one of the Claims 1 to 5 , characterized in that the opening (9) in the plate (8) is arranged in the middle of the surface formed by the plate (8). Heat exchanger (1) Claim 1 , characterized in that if at least one of the end plates (25) has a cavity, the cavity is connected to the refrigerant circuit with a coupling block (37). Heat exchanger (1) Claim 7 , characterized in that the coupling block (37) is connected to the end plate (25) via a flange (36). Heat exchanger (1) after one of the Claims 1 to 8th , characterized in that an electronic component for heating or cooling is arranged in the opening 9. Plate (8) for a plate heat exchanger (1) with an opening (9), the opening (9) being designed such that when a plurality of plates (8) are arranged next to one another, the openings (9) in the plates (8 ) form a cavity. Use of a plate (8) according to Claim 10 in a heat exchanger (1).

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