DE102006038728B4 - Refrigerant cycle system - Google Patents

Abstract

Refrigerant cycle system (1), in particular a motor vehicle air conditioning system with CO2 as refrigerant, in which the refrigerant along the refrigerant line (23) via a compressor (22) and a gas cooler (24) in the high pressure input (25) of a combined component is guided in a component, an internal heat exchanger (26) and an accumulator (28) combined, in which the through the inner heat exchanger (26) passed on the high-pressure side refrigerant comes into thermal contact with the accumulator (28) cached on the low pressure side and taken out therefrom refrigerant , wherein the refrigerant line (23) after passing through the inner heat exchanger (26) at the high pressure outputs (32, 33) of the combi component (27) in two different parallel connected branches (34, 35) of the refrigerant line (23), each with an expansion element (36, 37) and each one of the respective expansion element (36, 37) downstream evaporator (38, 39) divides, wherein the parallel branches branches (34, 35) of the refrigerant line (23) from the evaporators (38, 39) both via the low pressure inputs (40, 41) of the combi component (27) in the accumulator (28 ) lead and the cached refrigerant via the low pressure outlet (42) of the combi component (27) along the refrigerant line (23) back to the compressor (22), characterized in that on the combination component (27) of the internal heat exchanger (26) and accumulator (28) a distribution block (29) for connecting the combination component (27) with the two parallel branches branches (34, 35) is arranged, wherein the distribution block (29) a first double connection element (30) with connections for connection to the first expansion element (36) and the first evaporator (38) in the first branch (34) of the refrigerant line (23) and a second double connection element (31) with connections for the connection to the second Expander (37) and the second evaporator (39) in the branch (35) of the refrigerant line (23).

Description

The invention relates to a refrigerant cycle system, in particular for a motor vehicle air conditioning system with CO ₂ as the refrigerant.

Refrigerant cycle systems that z. B. use CO ₂ as a refrigerant, find particular for automotive air conditioning application. Refrigerant cycle systems include a compressor for compressing the gas and a gas cooler for cooling down the gas supplied by the compressor. The gas passes after cooling down in the gas cooler in an internal heat exchanger. The function of the internal heat exchanger is to transfer heat internally to the low-pressure side, which in turn is heated by it, for subcooling from the high-pressure side. From the high-pressure outlet of the internal heat exchanger, the refrigerant is supplied to an expansion element, which serves to reduce the pressure on the refrigerant. The expanding refrigerant is passed through an evaporator, which is externally supplied with air, which is thereby cooled and used for vehicle air conditioning. From the evaporator, the refrigerant is supplied to the accumulator, where the refrigerant is cached before a dependent on the operating condition amount of refrigerant required returns to the compressor. Another function of the accumulator is to maintain a reserve of refrigerant in order to compensate for the leakage losses occurring in the maintenance interval.

In air conditioning systems are increasingly used with two parallel evaporators application. The refrigerant circuit of such a prior art air conditioner comprises in addition to the two evaporators connected in parallel a compressor, a gas cooler, an internal heat exchanger and two expansion elements upstream of the two parallel evaporators. From a compressor, the refrigerant passes high pressure side into a gas cooler, in which the refrigerant is cooled by an ambient air flow. Thereafter, the refrigerant passes through the high pressure input in the inner heat exchanger and after passing through the inner heat exchanger via a high pressure outlet to a manifold connection. This distributor connection is located on the refrigerant line, wherein the distributor, which is designed as a three-way Schraubstelle, divides the refrigerant line into two branches, which run parallel to each other. In each of these branches downstream of an expansion device is arranged, in which the refrigerant passes after passing through the manifold. In both branches of the refrigerant line, the expanding refrigerant is then supplied to an evaporator, which is externally supplied with air, which in turn is thereby cooled and the vehicle air conditioning is used. The two branches of the refrigerant line then lead from the respective evaporator via two different inputs in a collector (accumulator), in which the refrigerant is temporarily stored before it can get back into the compressor via the low pressure input into the inner heat exchanger and from there via the low pressure outlet ,

Such two-evaporator systems require additional manifold connections. Usually these manifolds are located on a refrigerant line and thus require due to the presence of a second evaporator branch, which in addition to the second evaporator includes a second upstream expansion device, in each case an additional screwing both on the high pressure side and on the low pressure side. The increased number of screw points and the increasing interconnection of the lines leads not only to an increased outlay in the production process but also to rising material costs.

The object of the invention is to simplify the interconnection of the connecting lines in two-evaporator systems.

The solution to this problem consists in a refrigerant cycle system, in particular a motor vehicle air conditioning system with CO ₂ as a refrigerant, with two parallel evaporators and a combined component of an internal heat exchanger and an accumulator, the functionality of both an internal heat exchanger and a battery in a Component united. The invention is characterized in that three-way screw points, which are placed on the refrigerant pipes in the prior art, are displaced from the refrigerant lines to the combined component of the accumulator and the internal heat exchanger. In the refrigerant cycle system according to the invention, the refrigerant is fed along the refrigerant line via a compressor and a gas cooler in the high pressure input of an internal heat exchanger, whose task is to transmit heat internally to the low pressure side for subcooling from the high pressure side, which in turn is heated thereby. After the high-pressure outlet of the inner heat exchanger, the refrigerant line divides into two different branches connected in parallel with one expansion element and one evaporator downstream of the respective expansion element. According to the invention, the inner heat exchanger forms with the accumulator a structural unit in the form of a combined component. In this combi-component, the refrigerant passed through the inner heat exchanger on the high-pressure side arrives with the refrigerant temporarily stored in the accumulator on the low-pressure side and taken out of it in thermal contact. According to the invention, the two parallel branches of the refrigerant line, in each of which an expansion element and an expansion device downstream evaporator are arranged on each one of the high pressure outputs of the combi component of the internal heat exchanger and accumulator and open into a low pressure input of the combination component. The low-pressure inputs of the combined component of the internal heat exchanger and accumulator lead into the low-pressure side accumulator area of the combined component, which serves to temporarily store the refrigerant at low pressure. When removing the cached refrigerant, the refrigerant passes through the low-pressure outlet of the combined component of the internal heat exchanger and accumulator along the refrigerant line back to the compressor, whereby the refrigerant cycle system is closed.

The concept of the invention is that the connection points to the two evaporators are displaced from the refrigerant lines (prior art) to the combined component of the accumulator and the internal heat exchanger. In a preferred embodiment of the invention, a distribution block is arranged on the combination component of the internal heat exchanger and the accumulator for this purpose. This distribution block contains the screw points for connecting the combination component with the two branches connected in parallel.

Preferably, the distribution block is equipped with double connection elements. Thereby, the number of screw points, but also the interconnection of the lines can be considerably simplified, so that a clearer line design results.

Preferably, the double connection elements ensure the connections of the combined component to one of the branches of the refrigerant line connected in parallel with the expansion element and the evaporator both on the high pressure side and on the low pressure side.

A first double connection element thus provides two connections for the refrigerant line for the first branch of the branch lines of the refrigerant line connected in parallel. One port is located at the first high pressure exit from the combination component and is provided for the refrigerant line section leading from the first high pressure port to the first expansion port. A second port, which is located at the first low-pressure inlet, allows the connection of the first evaporator to the first low-pressure inlet of the combined component through the refrigerant line.

A second dual connection element provides two connections for the refrigerant line in the second branch. This second dual connection element may be parallel to or parallel to the first dual connection element on the distribution block above or below the first double connection element. However, an arrangement is also possible in which the double connection elements are placed in parallel at different heights and on opposite sides. In all cases, a first port located at the second high-pressure outlet of the combined component is provided for the refrigerant piping section leading from the second high pressure port to the second expansion port. A second port, which is placed at the second low-pressure inlet of the combined component, serves to secure the refrigerant piping section, which leads from the second evaporator to the second low-pressure inlet.

A dual connector preferably requires only one or two screws for attachment. Thus, the use of double connection elements saves time-consuming screwing operations.

With the solution according to the invention and its advantageous embodiments, more cost-effective manufacturing processes can be used compared to the prior art.

Further details, features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. Show it:

1 FIG. 2 is a block diagram of an air conditioner with two parallel-connected evaporators according to the prior art. FIG.

2 FIG. 4 is a block diagram of an air conditioner with the combined component accumulator with internal heat exchanger and two double connection blocks, FIG.

3a a branching section of the refrigerant piping 3 from the prior art with two three-way screw points on the refrigerant line 3 .

3b a branching section of the refrigerant piping 3 from the prior art with a three-way screw point on the refrigerant line 3 .

4a FIG. 2 is an external view of the combined component of the accumulator and the internal heat exchanger, including the distribution block with oppositely parallel double connection elements and screw locations, FIG.

4b FIG. 2: an external view of the combined component comprising the accumulator and the internal heat exchanger, including the distribution block with superimposed double connecting elements and screwing points, FIG.

5 ( 5a -F): a detail view of the distribution block with opposite terminals and

6 ( 6a -F): a detailed view of the distribution block with superimposed connections.

This in 1 The illustrated block diagram shows a prior art air conditioner for use in air conditioning of a vehicle. Such an air conditioner has a refrigerant cycle system 1 with a suitable refrigerant. From a compressor 2 the refrigerant passes through the refrigerant line 3 high pressure side into a gas cooler 4 in that the refrigerant is cooled by an ambient air flow. Thereafter, the refrigerant passes through the high pressure input 5 in the internal heat exchanger 6 and after passing the inner heat exchanger 6 via a high pressure outlet 7 to a distributor connection 8th , This distributor connection 8th lies on the refrigerant line 3 , where the distributor 9 , which is designed as a three-way screw point, the refrigerant pipe 3 in two branches 10 . 11 splits, which run parallel to each other. In each of these branches 10 . 11 downstream is initially an expansion organ 12 . 13 arranged in which the refrigerant after passing the distributor 9 arrives. In both branches 10 . 11 the refrigerant line 3 the expanding refrigerant is an evaporator 14 . 15 fed. The two branches 10 . 11 the refrigerant line 3 then lead from the respective evaporator 14 . 15 over two different entrances 16 . 17 in a collector 18 (Accumulator), in which the refrigerant is cached before passing through the low pressure input 19 in the internal heat exchanger 6 and from there via the low pressure outlet 20 back in the compressor 2 can get.

In contrast, shows 2 a block diagram of a usable for air conditioning of a vehicle air conditioning according to the invention. Such an air conditioner has a refrigerant cycle system 21 with a suitable refrigerant. From a compressor 22 the refrigerant passes through the refrigerant line 23 high pressure side into a gas cooler 24 in that the refrigerant is cooled by an ambient air flow. Thereafter, the refrigerant passes through the high pressure input 25 in the internal heat exchanger 26 , the part of the combination component 27 from an accumulator 28 and the internal heat exchanger 26 is. The high pressure outlet of the internal heat exchanger 26 will be at one on the combi component 27 located distribution block 29 that with two double connectors 30 . 31 is provided in two single high-pressure outputs 32 . 33 split, leading to two parallel branches 34 . 35 the refrigerant line 23 to lead. A first high-pressure outlet 32 from the internal heat exchanger 26 leads over the first double connection element 30 in a first branch 34 the refrigerant line 23 , A second high pressure outlet 33 from the internal heat exchanger 26 leads over the second double connection element 31 in a second branch 35 the refrigerant line 23 , In the two branches 34 . 35 the refrigerant line 23 the refrigerant is in each case an expansion element 36 . 37 ie in the first branch 34 the first expansion organ 36 and in the second branch 35 the second expansion organ 37 , fed. From the expansion organs 36 . 37 Finally, the expanded refrigerant to an evaporator, ie in the first branch 34 to the first evaporator 38 and in the second branch 35 to the second evaporator 39 , From the parallel evaporators 38 . 39 guides the refrigerant line 23 again to the double connection elements 30 . 31 of the distribution block 29 ie from the first evaporator 38 to the first double connection element 30 and from the second evaporator 39 to the second double connection element 31 , About the first low pressure input 40 on the first double connection element 30 and over the second low pressure input 41 on the second double connection element 31 guides the refrigerant line 23 in the accumulator 28 the combination component 27 and can via the low pressure outlet 42 back to the compressor 22 arrive, bringing the refrigerant cycle system 1 closed is.

In 3a is the branching section of the refrigerant piping 3 shown in the prior art, the connection of the collector 18 and the internal heat exchanger 6 both with each other and with the parallel evaporators 14 . 15 and expansion organs 12 . 13 in the two branches 10 . 11 the refrigerant line 3 allows. The high pressure outlet 7 the internal heat exchanger 6 is the distributor 9 downstream, which is designed as a first three-way screw point. Via a distributor connection 8th becomes the connection of the distributor 9 with the high pressure outlet 7 the internal heat exchanger 6 through the refrigerant line 3 produced. On the distributor 9 there is a screw point 44 , The distributor 9 shares how in 3a to see the refrigerant line 3 in the first branch 10 and the second branch 11 the refrigerant line 3 , The two branches 10 . 11 the refrigerant middle line 3 open into a second three-way screw point, the distributor 43 , From the distributor 43 leads the reunited refrigerant line 3 in an entrance of the collector 18 (Accumulator). From the collector 18 off leads another section of the refrigerant line 3 over the low pressure entrance 19 in the internal heat exchanger 6 , Overall, as in 3a shown, in this branching section six screw points 44 needed, with a total of two screw locations on the manifolds 9 . 43 on the refrigerant line 3 are located. This requires an additional screwing process on the high-pressure side and on the low-pressure side.

In 3b is another embodiment of the branching section of the refrigerant piping 3 shown in the prior art, the connection of the collector 18 (Accumulator) and the internal heat exchanger 6 both with each other and with the parallel evaporators and expansion devices in the two branches 10 . 11 allows. Unlike the execution in 3a are according to 3b directly at the collector 18 (Accumulator) three instead of two screw locations 44 educated. The two branches 10 . 11 the refrigerant line 3 lead, as in 3b can be seen, to the two different entrances 16 . 17 in the collector 18 (Accumulator). For fixing the refrigerant pipe 3 at the entrances 16 . 17 are according to 3b two of the total of three screw locations 44 at the collector 18 (Accumulator) provided. The starting point takes from here also the connecting line from the collector 18 (Accumulator) to the low pressure input 19 the internal heat exchanger 6 , for which another one of the three screw locations 44 at the collector 18 (Accumulator) is provided. Overall, also in this embodiment of the branching section, which also the arrangement in the block diagram according to 1 corresponds to six bolt locations 44 needed, with a screw point 44 at the distributor 9 on the refrigerant line 3 located.

4a shows an exterior view of the combination component 27 from the accumulator 28 and the internal heat exchanger 26 including the distribution block according to the invention 29 with opposite parallel arranged double connection elements 30 . 31 and screw points 44 , The distribution block 29 serves to connect the combination component 27 with the two branches connected in parallel 34 . 35 the refrigerant line 23 , The second branch 34 the refrigerant line 23 starts at the first high pressure outlet 32 and ends at the first low pressure input 40 , The attachment of the first branch 34 the refrigerant line 23 at the high pressure outlet 32 and at the first low pressure input 40 is about the first double connection element 30 guaranteed. The attachment of the second branch 35 the refrigerant line 23 at the second high pressure outlet 33 and at the second low pressure input 41 takes place via the second double connection element 31 , For attachment requires a double connection element 30 . 31 according to 4a one screw each for the screw point 44 , By using the double connectors 30 . 31 can the number of screw points 44 of six (according to the prior art 3a and 3b ) reduced to two. 4b shows an exterior view of the combination component 27 from the accumulator 28 and the internal heat exchanger 26 including the distribution block 29 in a similar arrangement as in 4a , the difference being that the double connecting elements 30 . 31 and the two screw holes 44 in 4b not opposite, but are arranged one above the other lying parallel on one side.

By the arrangements according to the invention according to the 4a and the 4b The number of screw points is reduced to two, but also the interconnection of the refrigerant line 3 compared to the prior art from the figures 3a and 3b is greatly simplified.

The 5 shows a detailed view of the distribution block 29 with parallel opposite terminals without representation of the double connecting elements 30 . 31 , The distribution block 29 is as a substantially cuboid attachment body on a lid 45 the combination component 27 from internal heat exchanger 26 and accumulator 28 arranged. 5a shows a side view of the distribution block 29 , where the distribution block 29 in this perspective as a rectangular centrally positioned essay sentence body on the lid 45 appears. Along the central cylinder axis 46 of the circular cylindrical combination component 27 that is orthogonal to the circular lid plane 47 of the lid 45 runs, has the right side view according to 5a Mirror symmetry.

5b shows a plan view of the lid plane 47 , The two longitudinal edges 48 of the distribution block 29 parallel and equally spaced on both sides to the mirror axis of symmetry 49 the lid level 47 , The inner edge 50 of the distribution block 29 runs orthogonal to the two longitudinal edges 48 of the distribution block 29 and the mirror symmetry axis 49 the lid level 47 , wherein the mirror symmetry axis 49 the inner edge 50 of the distribution block 29 cuts in the middle. The outer edge 51 of the distribution block 29 on the other hand is rounded, in the form that they in the plan view 5b with the lid edge 52 Has the same coverage. According to 5b is the length of the longitudinal edges 48 of the distribution block 29 more than the radius of the lid 45 but less than the lid diameter. Regarding the mirror symmetry axis 49 orthogonal axis 53 the lid level 47 is the distribution block 29 arranged asymmetrically.

5c shows a frontal view of the distribution block 29 , As the frontal view shows, the distribution block points 29 on the illustrated Longitudinal side face 54 a middle small circular screw opening 55 and on either side of it two larger circular openings 56 . 57 on, the low-pressure inlet opening 56 on the one hand and the high-pressure outlet opening 57 on the other hand, their centers on a common horizontal axis 58 lie. The smaller central screw opening 55 is for training the screwing point 44 a double connector 30 . 31 intended. The larger low-pressure inlet opening 56 , which are approximately in the middle of the lid 45 is positioned, serves as an inlet for the refrigerant at low pressure. The high-pressure outlet opening 57 located at the edge of the lid 45 located, serves as an outlet for the refrigerant from the internal heat exchanger 26 at high pressure. Starting from the marking of the cutting planes AA or BB in 5c is in 5d a section along the sectional plane AA of the connecting block shown with a view parallel to the cylinder axis 46 the combination component 27 , Out 5d it can be seen that on both longitudinal side surfaces in each case a low-pressure inlet opening 56.1 . 56.2 and a high pressure exit port 57.1 . 57.2 are located. The sectional view in 5d shows an inner low pressure input manifold 59 and an inner high pressure output manifold 60 , The inner low-pressure distributor 59 represents the connection of the two low-pressure inlet openings 56.1 . 56.2 to the accumulator 28 the combination component 27 ready by putting in the middle of the hollow channel 61.1 coming from the first low pressure input port 56.1 to the second low pressure input port 56.2 ranges, an orthogonal to the hollow channel 61.1 positioned fusion channel 62 is arranged in such a way that from the low-pressure inlet openings 56.1 . 56.2 inflowing refrigerant in the fusion channel 62 is merged.

The inner high-pressure outlet distributor 60 provides the connection of the two high-pressure outlet openings 57.1 . 57.2 to the internal heat exchanger 26 the combination component 27 ready by getting in the hollow channel 61.2 coming from the first high-pressure outlet opening 57.1 to the second high-pressure outlet opening 57.2 reaches, in the middle of the hollow channel 61.2 a circular opening of the orthogonal to the hollow channel 61.2 extending connection channel 63 to the tube of the internal heat exchanger 26 located.

The T-shaped arrangement of the inner low-pressure inlet manifold 59 shows 5e with a sectional view along the section plane BB according to 5c , The hollow channel 61.1 coming from the first low pressure input port 56.1 to the second low pressure input port 56.2 reaches, is in the middle by the orthogonal to the hollow channel 61.1 positioned fusion channel 62 divided. The fusion channel extends from the hollow channel 61.1 through the interior of the lid 45 up to the lid inner surface. 5f shows an isometric view of the lid 45 with a distribution block 29 on each of the two longitudinal sides 54 three different openings 55 . 56 . 57 having. The distribution block 29 is shaped substantially parallelepiped, with the exception of the edge side surface 64 on the outer edge 51 of the distribution block 29 like the lid edge 52 is bent.

A detail view of the distribution block 29 with parallel superimposed connections shows 6 , The distribution block 29 is as a substantially cuboid attachment body on the lid 45 the combination component 27 from internal heat exchanger 26 and accumulator 28 arranged. 6a shows a side view of the distribution block 29 , where the distribution block 29 in this perspective as a rectangular, approximately but not exactly centered essay sentence body on the lid 45 appears. The connection block 29 is in 6 narrower and higher trained than the connection block 29 according to 5 ,

6b shows a plan view of the lid plane 47 , The two longitudinal edges 65 . 66 of the distribution block 29 run parallel to the axis 68 of the lid 45 , The inner edge 67 of the distribution block 29 runs orthogonal to the two longitudinal edges 65 . 66 and to the axis 68 of the lid 45 , where the axis 68 of the lid 45 the inner edge 67 outside the middle of the inner edge 67 cuts. The outer edge 69 of the distribution block 29 on the other hand is curved, in the form that they in the plan view 6b with the lid edge 52 Has the same coverage. According to 6b is the length of the longitudinal edges 65 . 66 more than the radius of the lid 45 but less than the lid diameter. Regarding to the axis 68 of the lid 45 orthogonal axis of the lid 45 is the distribution block 29 arranged asymmetrically.

6c shows the frontal view of the distribution block 29 in this alternative embodiment. As this frontal view shows, the distribution block points 29 on the long side surface 70 two superimposed middle small circular screw holes 71 and on each side two larger superimposed circular openings 72 . 73 on, on the one hand, these larger superimposed openings low-pressure inlet openings 72 and on the other hand high-pressure outlet openings 73 are. The midpoints of the three upper circular openings 71 . 72 . 73 lie on a common upper horizontal axis 74 , the midpoints of the three lower circular openings 71 . 72 . 73 lie on the parallel lower horizontal axis 75 , The smaller middle screw holes 71 are for training the screwing point 44 a double connector 30 . 31 intended. The bigger ones superimposed low-pressure inlet openings 72 , which are approximately in the middle of the lid 45 are positioned, serve as an inlet for the refrigerant at low pressure. The two superimposed high-pressure outlet openings 73 located at the edge of the lid 45 located, serve as outlet openings for the refrigerant from the internal heat exchanger 26 at high pressure.

Starting from the marking of the cutting planes AA or BB in 6c is in 6d a section along the sectional plane AA of the connection block 29 represented, with view parallel to the cylinder axis 46 the combination component 27 , Out 6d it can be seen that only on the long side surface 70 below the longitudinal edge 65 openings 71 . 72 . 73 are located. The sectional view in 6d shows an inner low pressure input manifold 76 and an inner high pressure output manifold 77 , The inner low-pressure input distributor 76 provides the connection of the two superimposed low-pressure inlet openings 72 to the accumulator 28 the combination component 27 ready by the short entry channels 78 in an orthogonal to the entrance channels 78 positioned fusion channel 79 in such a way that in both low-pressure inlet openings 72 inflowing refrigerant in the fusion channel 79 is merged.

The inner high-pressure outlet distributor 77 provides the connection of the two superimposed high-pressure outlet openings 73 to the internal heat exchanger 26 the combination component 27 ready by the short entry channels 78 in an orthogonal to the entrance channels 78 positioned connection channel 80 usher.

The F-shaped arrangement of the inner low-pressure inlet manifold 76 shows 6e with a sectional view along the section plane BB according to 6c , The entrance channels 78 lead into the orthogonal to this aligned connecting channel 80 into it, passing through the interior of the lid 45 extends to the lid inner surface.

6f shows an isometric view of the lid 45 with a distribution block 29 , which only on the long side surface 70 below the longitudinal edge 65 openings 71 . 72 . 73 having. The distribution block 29 is shaped substantially parallelepiped, with the exception of the edge side surface 64 below the outer edge 69 of the distribution block 29 like the lid edge 52 is bent.

LIST OF REFERENCE NUMBERS

1

Refrigerant cycle system

2

compressor

3

Refrigerant line

4

gas cooler

5

High pressure input

6

internal heat exchanger

7

High pressure outlet

8th

distributor connection

9

distributor

10

first branch of the refrigerant line 3

11

second branch of the refrigerant line 3

12

first expansion organ

13

second expansion organ

14

first evaporator

15

second evaporator

16

first entrance

17

second entrance

18

Collector (accumulator)

19

Low pressure input

20

Low-pressure outlet

21

Refrigerant cycle system

22

compressor

23

Refrigerant line

24

gas cooler

25

High pressure input

26

internal heat exchanger

27

Combination component

28

accumulator

29

distribution block

30

first double connection element

31

second double connection element

32

first high-pressure outlet

33

second high pressure outlet

34

first branch of the refrigerant line 23

35

second branch of the refrigerant line 23

36

first expansion organ

37

second expansion organ

38

first evaporator

39

second evaporator

40

first low pressure input

41

second low pressure input

42

Low-pressure outlet

43

distributor

44

screw location

45

cover

46

Cylinder axis

47

lid plane

48

Longitudinal edges of the distribution block 29

49

Mirror symmetry

50

inner edge of the distribution block 29

51

outer edge of the distribution block 29

52

cover edge

53

Axis of the cover plane 47

54

Longitudinal side face

55

screw opening

56

Low pressure inlet opening, circular opening

56.1

first low pressure input port,

56.2

second low pressure input port

57

High pressure outlet opening, circular opening

57.1

first high-pressure outlet opening

57.2

second high-pressure outlet opening

58

horizontal axis

59

internal low-pressure input distributor

60

internal high-pressure outlet distributor

61.1

hollow channel

61.2

hollow channel

62

merge channel

63

connecting channel

64

Peripheral side area

65

longitudinal edge

66

longitudinal edge

67

inner edge

68

Axis of the lid 45

69

Outside edge of the distribution block 29

70

Longitudinal side face

71

screw holes

72

Low pressure input port

73

High-pressure outlet opening

74

upper horizontal axis

75

lower horizontal axis

76

internal low-pressure input distributor

77

internal high-pressure outlet distributor

78

inlet channels

79

merge channel

80

connecting channel

Claims (5)

Refrigerant cycle system ( 1 ), in particular a motor vehicle air conditioning system with CO ₂ as refrigerant, in which the refrigerant along the refrigerant line ( 23 ) via a compressor ( 22 ) and a gas cooler ( 24 ) in the high pressure input ( 25 ) of a combined component, which in one component has an internal heat exchanger ( 26 ) and an accumulator ( 28 ), in which by the internal heat exchanger ( 26 ) passed on the high-pressure side refrigerant with the in the accumulator ( 28 ) comes in thermal contact on the low pressure side cached and taken out therefrom refrigerant, wherein the refrigerant line ( 23 ) after passing through the internal heat exchanger ( 26 ) at the high pressure outputs ( 32 . 33 ) of the combination component ( 27 ) into two different branches connected in parallel ( 34 . 35 ) of the refrigerant line ( 23 ) each with an expansion organ ( 36 . 37 ) and one each the respective expansion organ ( 36 . 37 ) downstream evaporator ( 38 . 39 ), whereby the branches connected in parallel ( 34 . 35 ) of the refrigerant line ( 23 ) from the evaporators ( 38 . 39 ) both via the low pressure inputs ( 40 . 41 ) of the combination component ( 27 ) in the accumulator ( 28 ) and transfer the cached refrigerant via the low-pressure outlet ( 42 ) of the combination component ( 27 ) along the refrigerant line ( 23 ) back to the compressor ( 22 ), characterized in that on the combi-component ( 27 ) from internal heat exchanger ( 26 ) and accumulator ( 28 ) a distribution block ( 29 ) for combining the combined component ( 27 ) with the two branches connected in parallel ( 34 . 35 ), the distribution block ( 29 ) a first double connection element ( 30 ) with connections for the connection to the first expansion element ( 36 ) and the first evaporator ( 38 ) in the first branch ( 34 ) of the refrigerant line ( 23 ) as well as a second double connection element ( 31 ) with connections for the connection to the second expansion element ( 37 ) and to the second evaporator ( 39 ) in the branch ( 35 ) of the refrigerant line ( 23 ) having. Refrigerant cycle system ( 1 ) according to claim 1, characterized in that the first double connecting element ( 30 ) the second double connection element ( 31 ) is parallel opposite. Refrigerant cycle system ( 1 ) according to claim 1, characterized in that the first double connecting element ( 30 ) and the second double connection element ( 31 ) lie parallel one above the other. Refrigerant cycle system ( 1 ) according to one of claims 1 to 3, characterized in that a double connecting element ( 30 . 31 ) each require a screw for attachment. Refrigerant cycle system ( 1 ) according to one of claims 1 to 4, characterized in that a double connecting element ( 30 . 31 ) each two screws needed for attachment.

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