JP2008044607A - Refrigerant circuit system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the mutual connection of connection lines in a double evaporator system. <P>SOLUTION: A refrigerant flows through a compressor 22 and a gas cooler 24 along a refrigerant line 23, and enters the high-pressure inlet 25 of a combined component 2. The refrigerant passing through an internal heat exchanger 26 is brought into thermal contact with the refrigerant taken out from an accumulator 28. The refrigerant line 23 is divided into two different branch parts 34, 35 switchable parallel to each other. Each branch part has swelling members 36, 37 and evaporators 38, 39 on the downstream side. The branch parts 34, 35 are extended from the evaporators 38, 39 to the accumulator 28 through the low pressure inlets 40, 41 of the combined component 27. Consequently, the refrigerant re-arrives at the compressor 22 through the low-pressure outlet 42 of the combined component 27 along the refrigerant line 23. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a refrigerant circuit system, and more particularly to a refrigerant circuit system for a vehicle HVAC that uses CO ₂ as a refrigerant.

For example, a refrigerant circuit system that uses CO ₂ as a refrigerant is used particularly for automobile HVAC. The refrigerant circuit system includes a compressor for compressing gas and a gas cooler for cooling the gas discharged from the compressor. The gas flows into the internal heat exchanger after being cooled in the gas cooler. The internal heat exchanger functions to transfer the supercooling heat from the high pressure side to the low pressure side in the system, whereby heating is performed. The high-pressure outlet of the internal heat exchanger guides the refrigerant to the expansion member, and this member serves to reduce the pressure of the refrigerant. The expanded refrigerant passes through the evaporator, and as a result of the air being directed to the outside, the air is cooled and used for vehicle air conditioning. The refrigerant coming from the evaporator is supplied to the accumulator, where the refrigerant is stored intermediately, and then the amount of refrigerant required according to the operating state reaches the compressor again. Another function of the accumulator is to provide a refrigerant reserve that compensates for leakage losses that occur during maintenance periods.

  HVAC has increasingly used systems that include two evaporators that are switched in parallel. In addition to two evaporators that are switched in parallel, a refrigerant circuit such as a prior art HVAC has a compressor, gas cooler, internal heat exchanger, and two expansions located upstream of the two parallel evaporators. A member is provided. High pressure refrigerant reaches the gas cooler from the compressor, where it is cooled by the ambient airflow. It then flows into the internal heat exchanger through the high pressure inlet, passes through the internal heat exchanger, and then enters the manifold connection through the high pressure outlet. The manifold connection is positioned on the refrigerant line, and the manifold is set as a three-way screw connector that divides the refrigerant line into two branches extending in parallel with each other. An expansion member is first arranged downstream of each branch and reaches here after the refrigerant has passed through the manifold. Then, in each of the two branches of the refrigerant line, the expanded refrigerant is oriented to the evaporator, and the air is oriented to the outside of the evaporator, whereby a part of the air is cooled and used for vehicle air conditioning. used. Both branches then continue from each evaporator through two separate inlets to the collector (accumulator) where the refrigerant is stored intermediately and then through the low pressure inlet to the internal heat exchanger. In, and from there through the low pressure outlet to the compressor again.

  The object of the present invention is to simplify the interconnection of connection lines in a double evaporator system.

This problem is solved especially by an automotive HVAC refrigerant circuit system that uses CO ₂ as the refrigerant, and this system has two evaporators that can be switched in parallel, and the functions of an internal heat exchanger and an accumulator. A combination component including an internal heat exchanger and an accumulator to be combined within the element. The present invention is characterized by the transfer of the three-way screw point, which was located on the refrigerant line in the prior art, to a combined component with an accumulator and an internal heat exchanger.

  In the refrigerant circuit system according to the present invention, the refrigerant flows along the refrigerant line through the compressor and the gas cooler and enters the high-pressure inlet of the internal heat exchanger, the internal heat exchanger supplies the heat for supercooling to the system. It is necessary to transmit from the high-pressure side to the low-pressure side in this way so that a part thereof is heated. On the downstream side of the high pressure outlet of the internal heat exchanger, the refrigerant line is divided into two separate branches that are switched in parallel with each other, each comprising an expansion member and an evaporator downstream of the expansion member. Yes. According to the invention, the internal heat exchanger as well as the accumulator together form one component in the form of a combined component. In this combination component, the refrigerant passing through the internal heat exchanger on the high pressure side is in thermal contact with the refrigerant taken from the accumulator, and in the accumulator, the refrigerant is stored intermediately on the low pressure side. According to the present invention, each of the two parallel switching branch portions of the refrigerant line is provided with an expansion member and an evaporator located on the downstream side of the expansion member, and the branch portion includes an internal heat exchanger and an accumulator. Starting with one of the high pressure outlets of the combination component with and ending with the low pressure inlet of the combination component. The low pressure inlet of the combination component with an internal heat exchanger and an accumulator follows the low pressure region of the combination component, which region is used for intermediate storage of low pressure refrigerant. When the intermediate stored refrigerant is taken, the refrigerant flows again through the low pressure outlet of the combined component with internal heat exchanger and accumulator, along the refrigerant line to the compressor, and the refrigerant circuit system is closed. Be able to.

  The principle of the present invention is that the connection point for the two evaporators has been transferred from the refrigerant line (prior art) to a combined component comprising an internal heat exchanger and an accumulator. To accomplish this, the manifold is placed on a combination component comprising the internal heat exchanger and accumulator of the preferred embodiment of the present invention. The manifold includes a screw point for connecting the combination component to two branches that are switched in parallel with each other.

  Preferably, the manifold comprises double connection elements. This significantly reduces the number of screw points and simplifies line interconnection, resulting in a more clearly arranged line design.

  Preferably, the double connection element ensures that the combination component is connected to one of the parallel switching branches of the refrigerant line with expansion members and evaporators on both the high and low pressure sides in both cases .

  Thus, the first double connection element provides two connections to the refrigerant line for the first branch of the parallel switching branch of the refrigerant line. One connection is located at the first high pressure outlet from the combination component and is provided in that portion of the refrigerant line from the first high pressure outlet to the first expansion member. Another connection is provided at the first low-pressure inlet and makes it possible to connect the first evaporator to the first low-pressure inlet of the combination component via a refrigerant line.

  The second double connection element comprises two connections for the refrigerant line at the second branch. This double connection element can be arranged in parallel opposite the first double connection element or in parallel above or below it, respectively. However, a configuration is also possible in which these double connection elements are arranged at different heights or in parallel on both sides. In all cases, the first connection located at the second high-pressure outlet of the combination component is provided in that part of the refrigerant line that continues from the second high-pressure outlet to the second expansion member. A second connection located at the second high pressure inlet of the combination component serves to attach that portion of the refrigerant line that leads from the second evaporator to the second low pressure inlet.

  Preferably, only one or two screws are required to fasten the double connection element. Thus, the double connection element saves time-consuming screwing operations. Compared to the prior art, the solution according to the invention, including advantageous embodiments, allows the use of a cost-effective manufacturing process.

  Additional details, features, and functions of the present invention will be readily understood from the following description of example embodiments with reference to the accompanying drawings.

  The block diagram of FIG. 1 shows a prior art HVAC that can be used for vehicle air conditioning. Such an HVAC has a refrigerant circuit system 1 with a suitable refrigerant. The refrigerant flows from the compressor 2 through the high-pressure side refrigerant line 3 to the gas cooler 4 where the refrigerant is cooled by the ambient airflow. Next, the refrigerant enters the internal heat exchanger 6 through the high-pressure inlet 5, passes through the internal heat exchanger 6, and then flows through the high-pressure outlet 7 to the manifold connection 8. Since the manifold connecting portion 8 is disposed on the refrigerant line 3, the manifold 9 set as a three-way screw connector divides the refrigerant line 3 into two branch portions 10 and 11 extending in parallel with each other. In each of the branch portions 10 and 11, the expansion members 12 and 13 are first disposed on the downstream side, and the refrigerant flows after passing through the manifold 9. In both branches 10 and 11 of the refrigerant line 3, the expanded refrigerant is directed to the evaporators 14 and 15. Both branches 10, 11 of the refrigerant line 3 then continue from each of the evaporators 14, 15 through two separate inlets 16, 17 to the collector 18 (accumulator), where the refrigerant is stored intermediately. After that, it flows into the internal heat exchanger 6 through the low pressure inlet 19, and further flows into the compressor 2 again through the low pressure outlet 20.

  On the other hand, FIG. 2 shows a block diagram of an HVAC usable for vehicle air conditioning according to the present invention. Such an HVAC includes a refrigerant circuit system 21 having a suitable refrigerant. The refrigerant flows from the compressor 22 through the high-pressure side refrigerant line 23 to the gas cooler 24 where it is cooled by the ambient airflow. The refrigerant then enters the internal heat exchanger 26 through the high pressure inlet 25, which is part of a combination component 27 comprising an accumulator 28 and an internal heat exchanger 26. In a manifold 29 with two double connection elements 30, 31, the high pressure outlet of the internal heat exchanger 26 is divided into two single high pressure outlets 32, 33, which are two of the refrigerant line 23. Continue to the parallel branch sections 34, 35. A first high-pressure outlet 32 that continues from the internal heat exchanger 26 to the outside passes through the double connection element 30 to the first branch 34 of the refrigerant line 23. A second high-pressure outlet 33 that continues from the internal heat exchanger 26 to the outside passes through the double connection element 31 to the second branch 35 of the refrigerant line 23. In each of the branch portions 34 and 35 of the refrigerant line 23, the refrigerant is expanded into the expansion members 36 and 37, that is, the first expansion member 36 in the first branch portion 34 and the second expansion member in the second branch portion 35. To 37. Finally, the expanded refrigerant reaches the evaporator from the expansion members 36 and 37, that is, the first evaporator 38 in the first branch portion 34, and the second evaporator 39 in the second branch portion 35. Similarly, the refrigerant line 23 has a second evaporation from the parallel switching evaporators 38, 39 to the double connection elements 30, 31 of the manifold 29, ie from the first evaporator 38 to the first double connection element 30. The device 39 continues to the second double connection element 31. The refrigerant line 23 passes through the first low-pressure inlet 40 in the first double connection element 30 and passes through the second low-pressure inlet 41 in the second double connection element 31, and the accumulator of the combined component 27. At 28, the refrigerant can reach the compressor 22 again through the low pressure outlet 42, resulting in the refrigerant circuit system 1 being closed.

  FIG. 3 a shows a branch portion of the refrigerant line 3 according to the prior art, which connects the collector 18 and the internal heat exchanger 6 to each other, and further at both branches 10, 11 of the refrigerant line 3. Allows connection to parallel switching evaporators 14 and 15 and expansion members 12 and 13. On the downstream side of the high-pressure outlet 7 of the internal heat exchanger 6, a manifold 9 set as a three-way screwing point is arranged. When passing through the manifold connection 8, the manifold 9 is connected to the high-pressure outlet 7 of the internal heat exchanger 6 through the refrigerant line 3. The manifold 9 has a screw point 44. As can be seen in FIG. 3 a, the manifold 9 divides the refrigerant line 3 into a first branch part 10 and a second branch part 11 of the refrigerant line 3. Both branches 10, 11 of the refrigerant line 3 terminate at a second three-way screw point or manifold 43. The recombined refrigerant line 3 continues from the manifold 43 to the inlet of the collector 18 (accumulator). Another part of the refrigerant line 3 continues from the collector 18 through the low pressure inlet 19 into the internal heat exchanger 6. As shown in FIG. 3a, a total of six screw points are required at this branch, and there are a total of two screw points in the manifolds 9, 43 on the refrigerant line 3. This requires the addition of one screwing process on each of the high pressure side and the low pressure side.

  FIG. 3b shows another embodiment of a branching part of the refrigerant line 3 according to the prior art, which connects the collector 18 (accumulator) and the internal heat exchanger 6 to each other, It is possible to connect to the parallel switching evaporator and the expansion member at the branch portions 10 and 11.

  Referring now to FIG. 3b, in contrast to the embodiment of FIG. 3a, three screw points instead of two are set directly on the collector 18 (accumulator). Both branches 10, 11 of the refrigerant line 3 lead to two separate inlets 16, 17 of the collector 18 (accumulator), as can be seen in FIG. 3b. In order to fasten the refrigerant line 3 according to FIG. 3b to the inlets 16, 17, two of the three screw points 44 at the collector 18 (accumulator) are provided. Here too, a connection line is provided from the collector 18 (accumulator) to the low pressure inlet 19 of the internal heat exchanger 6. Also, in this embodiment of the bifurcation corresponding to the configuration of the block diagram according to FIG. 1, a total of six screw points are required, and one screw point 44 is arranged in the manifold 9 on the refrigerant line 3. Is done.

  FIG. 4 a shows the appearance of a combination component 27 comprising an accumulator 28 and an internal heat exchanger 26, including a manifold 29 with double connection elements 30, 31 and screwing points 44 arranged parallel and opposite to each other. FIG. The manifold 29 functions to connect the combination component 27 to the two branches 34, 35 of the refrigerant line 23 that are switched in parallel with each other. The second branch 34 of the refrigerant line 23 starts at the first high pressure outlet 32 and ends at the first low pressure inlet 40. Fastening of the first branch 34 of the refrigerant line 23 to the first high-pressure outlet 32 and the first low-pressure inlet 40 is ensured via the first double connection element 30. Fastening of the second branch portion 35 of the refrigerant line 23 to the second high-pressure outlet 33 and the second low-pressure inlet 41 is performed via the second double connection element 31. The double connection elements 30, 31 according to FIG. 4 a require one screw for the screwing point 44. Due to the use of the double connection elements 30, 31, the number of screwing points 44 can be reduced from six (prior art according to FIGS. 3a and 3b) to two.

  FIG. 4b is an external view of a combination component 27 comprising an accumulator 28 and an internal heat exchanger 26, including a manifold 29 arranged similar to FIG. 4a, with the double connection elements 30, 31 of FIG. They are not arranged and are different in that they are arranged in parallel on one side.

  Due to the configuration of the present invention according to FIGS. 4a and 4b, the number of screwing points 44 is reduced to two, but the refrigerant line 3 is interconnected compared to the prior art shown in FIGS. 3a and 3b. It is substantially simplified.

  FIG. 5 shows a detailed view of the manifold 29 with parallel connections facing each other, the double connection elements 30, 31 are not shown. The manifold 29 exists as a basically rectangular mounting body disposed on the cover 45 of the combination component 27 comprising the internal heat exchanger 26 and the accumulator 28. FIG. 5a shows a side view of the manifold 29, which looks like a rectangular body placed on the cover and centered in this perspective. Along the central cylindrical axis 46 of the cylindrical combination component 27, i.e. the axis 46 extending perpendicular to the circular cover plane 47 of the cover 46, the right side view according to Fig. 5a is mirror-symmetric.

  FIG. 5 b is a plan view of the cover surface 47. The longitudinal edge 48 of the manifold 29 extends parallel to both sides of the cover surface 47 that are equidistant from the mirror symmetry axis 49. The inner edge 50 of the manifold 29 extends perpendicular to the longitudinal edge 48 of the manifold 29 and the mirror symmetry axis 49 of the cover surface 47, which intersects the inner edge 50 of the manifold 29 at the center. . The outer edge 51 of the manifold 29 is set to be rounded in a form that fits the cover edge 52 in the plan view of FIG. 5b. According to FIG. 5b, the length of the longitudinal edge 48 of the manifold 29 is longer than the radius of the cover 45 and shorter than the diameter of the cover. The manifold 29 is disposed asymmetrically with respect to the axis 53 of the cover surface 47, and the axis 53 is perpendicular to the mirror symmetry axis 49.

  FIG. 5 c is a front view of the manifold 29. As this front view shows, the manifold 29 has a longitudinal center surface 54 with a small central screw hole 55 and two large circular holes 56, 57 located on opposite sides and centered on a common horizontal axis 58. It has. A small central screw hole 5 is formed so as to set the screwing point 44 of the double connection elements 30, 31. A wide low-pressure inlet hole 56 positioned substantially in the central region of the cover 45 functions as an inlet hole for low-pressure refrigerant. The high-pressure outlet hole 57 arranged in the edge region of the cover 45 functions as an outlet hole for the high-pressure refrigerant from the internal heat exchanger 26.

  Referring to the representation of cut planes AA and BB in FIG. 5 c, FIG. 5 d shows a cross-section along the cut plane AA as viewed in a direction parallel to the cylindrical axis 46 of the combination component 27. It is shown in In FIG. 5, low pressure inlet holes 56.1, 56.2 and high pressure outlet holes 57.1, 57.2 are shown on each longitudinal side surface. In cross section, FIG. 5d, an inner low pressure inlet manifold 59 and an inner high pressure outlet manifold 60 are shown. The inner low-pressure manifold 59 connects two low-pressure inlet holes 56.1, 56.2 to the accumulator 28 of the combination component 27 in the middle of the hollow channel 61.1. Extending from the low pressure inlet hole 56.1 to the second low pressure inlet hole 56.2, the integrated channel 62 is orthogonal to the hollow channel 61.6 such that refrigerant entering from the low pressure inlet hole enters the integrated channel 62 together. Are arranged.

  The inner high pressure outlet manifold 60 connects the two high pressure outlet holes 57.1, 57.2 in the hollow channel 61.2 to the internal heat exchanger 26 of the combined component 27, which hollow channel 61.2 There is a circular hole in the connecting channel 63 extending from the first high-pressure outlet hole 57.1 to the second high-pressure outlet hole 57.2 and extending perpendicular to the hollow channel 61.2. Leads to the pipe.

  A T-shaped configuration of the internal low pressure inlet manifold 59 is shown in FIG. 5e in a cross-sectional view along section BB according to FIG. 5c. The hollow channel 61.1 extending from the first low-pressure inlet hole 56.1 to the second low-pressure inlet hole 56.2 is divided in the center by an integrated channel 62 positioned perpendicular to the hollow channel 61.1. The integrated channel extends from the hollow channel 61.1 through the inside of the cover 45 to the inner surface of the cover.

  FIG. 5 f shows an isometric view of the cover 45 with the manifold 29, which includes three different holes 55, 56, 57 on each of the longitudinal surfaces 54. The manifold 29 is substantially rectangular except for the edge side surface of the outer edge 51 of the manifold 29 that is curved in the same manner as the cover edge 52.

  A detailed view of the manifold 29 with connecting parts arranged in parallel vertically is shown in FIG. Manifold 29 exists as a generally rectangular body disposed on the cover of combination component 27 that includes internal heat exchanger 26 and accumulator 28. FIG. 6a shows a side view of the manifold 29, which in this perspective looks like a body that is rectangular but approximated rather than accurately centered on the cover 45. FIG.

  FIG. 6 b is a plan view of the cover surface 47. Both longitudinal edges 65, 66 of the manifold 29 extend parallel to the axis 68 of the cover 45. The inner edge 67 of the manifold 29 extends perpendicular to both longitudinal edges 65, 66 and the axis 68 of the cover 45, and the axis 68 of the cover 45 extends from the center of the inner edge 67 to the inner edge 67 on the outside. Intersect. However, the outer edge 69 of the manifold 29 is curved and set so that the outer edge 69 fits the cover edge 52 in the plan view of FIG. According to FIG. 6b, the length of the longitudinal edges 65, 66 is longer than the radius of the cover 45 but shorter than the cover diameter. The manifold 29 is disposed asymmetrically with respect to an axis perpendicular to the axis 68 of the cover 45.

  FIG. 6c shows a front view of the manifold 29 of this alternative embodiment. As shown in the front view, the manifold 29 has two small central circular screw holes 71 arranged vertically and two wide circular holes 72, 73 arranged vertically on both longitudinal surfaces. One of these wide holes is a low-pressure inlet hole 72, and the other is a high-pressure outlet hole 73. The centers of the three upper circular holes 71, 72, 73 are arranged on a common upper horizontal axis 74, and the centers of the three lower circular holes 71, 72, 73 are lower sides extending in parallel to the upper horizontal axis 74. It is arranged on the horizontal axis 75. A small central screw hole 71 is formed to set the screwing point 44 of the double connection elements 30, 31. The large low-pressure inlet holes 72 placed on top of each other and positioned substantially in the central region of the cover 45 function as inlet holes for the low-pressure refrigerant. Both high-pressure outlet holes 73 placed on top of each other arranged in the edge region of the cover 45 function as outlet holes for the high-pressure refrigerant from the internal heat exchanger 26.

  Referring to the respective representations of cut planes AA and BB in FIG. 6 c, in FIG. 6 d the cross section along the cut plane AA of the connection block 29 is parallel to the cylindrical axis 46 of the combination component 27. It is shown as seen in the direction. From FIG. 6 d it can be seen that there are holes 71, 72, 73 only on the longitudinal side surface 70 below the longitudinal edge 65. The cross-sectional view of FIG. 6 d shows the internal low pressure inlet manifold 76 and the internal high pressure outlet manifold 77. Since the short inlet channel 78 follows the integrated channel 79 positioned perpendicular to the inlet channel 78 so that the refrigerant flowing in from both low pressure inlet holes 78 is collected in the integrated channel 79, the internal low pressure inlet manifold 76 is Forms a connection of two low pressure inlet channels 72 to the accumulator 28 of the combination component 27.

  The short inlet channel 78 leads to a connecting channel 80 positioned perpendicular to the inlet channel 78 so that the internal high pressure outlet manifold 77 connects the two high pressure outlet holes 73 to the internal heat exchanger 26 of the combination component 27. Form.

  The F-shaped configuration of the internal low pressure inlet manifold 76 is shown in FIG. 6e using a cross-sectional view along section BB according to FIG. 6c. The inlet channel 78 follows a connecting channel 80 aligned perpendicular to the inlet channel 78, which extends through the interior of the cover 45 to the inner surface of the cover.

  FIG. 6 f shows an isometric view of the cover 45 with the manifold 29, which includes holes 71, 72, 73 only on the longitudinal side surface 70 below the longitudinal edges. The manifold 29 is curved like the cover edge 52 and is essentially rectangular except for the edge side surface 64 below the outer edge 69 of the manifold 29.

1 is a block diagram of an HVAC with two parallel switching evaporators according to the prior art. FIG. 4 is a block diagram having a combination component with an accumulator and an internal heat exchanger and two double connection blocks. FIG. 2 is a view of a bifurcation portion of a prior art refrigerant line 3 with two three-way screw points located on the refrigerant line 3. FIG. 3 is a view of a branching portion of a prior art refrigerant line 3 with one three-way screw point located on the refrigerant line 3. 1 is an external view of a combination component comprising an accumulator and an internal heat exchanger, including a manifold with double connection elements and screw points arranged oppositely in parallel. FIG. 1 is an external view of a combination component comprising an accumulator and an internal heat exchanger including a manifold with double connection elements and screw points arranged one above the other. FIG. 3 is a detailed view of a manifold having connecting portions disposed opposite to each other. FIG. 3 is a detail view of manifolds having connections disposed on top of each other.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerant circuit system 2 Compressor 3 Refrigerant line 4 Gas cooler 5 High pressure inlet 6 Internal heat exchanger 7 High pressure outlet 8 Manifold connection part 9 Manifold 10 First branch part of the refrigerant line 3 11 Second branch part of the refrigerant line 3 DESCRIPTION OF SYMBOLS 12 1st expansion member 13 2nd expansion member 14 1st evaporator 15 2nd evaporator 16 1st inlet 17 2nd inlet 18 Collector (accumulator)
DESCRIPTION OF SYMBOLS 19 Low pressure inlet 20 Low pressure outlet 21 Refrigerant circuit system 22 Compressor 23 Refrigerant line 24 Gas cooler 25 High pressure inlet 26 Internal heat exchanger 27 Combination component 28 Accumulator 29 Manifold 30 First double connection element 31 Second double connection Element 32 First high-pressure outlet 33 Second high-pressure outlet 34 First branch portion of the refrigerant line 23 35 Second branch portion of the refrigerant line 23 36 First expansion member 37 Second expansion member 38 First evaporation Vessel 39 second evaporator 40 first low pressure inlet 41 second low pressure inlet 42 low pressure outlet 43 manifold 44 screwing point 45 cover 46 cylindrical shaft 47 cover surface 48 longitudinal edge of manifold 29 49 mirror symmetry axis 50 manifold 29 inner edge 51 outer edge of manifold 29 52 cover edge 53 cover Surface 47 axis 54 longitudinal side surface 55 screw hole 56 low pressure inlet hole, circular hole 56.1 first low pressure inlet hole 56.2 second low pressure inlet hole 57 high pressure outlet hole, circular hole 57.1 first High pressure outlet hole 57.2 Second high pressure outlet hole 58 Horizontal axis 59 Inner low pressure inlet manifold 60 Inner high pressure outlet manifold 61.1 Hollow channel 61.2 Hollow channel 62 Integration channel 63 Connection channel 64 Edge side 65 Longitudinal edge 66 Longitudinal direction 67 Inner edge 68 Shaft of cover 45 69 Outer edge of manifold 29 70 Longitudinal surface 71 Screw hole 72 Low pressure inlet hole 73 High pressure outlet hole 74 Upper horizontal shaft 75 Lower horizontal shaft 76 Inner low pressure inlet manifold 77 Inner high pressure outlet manifold 78 Inlet channel 79 Integrated channel 80 Connection channel

Claims (8)

In particular, an automotive HVAC refrigerant circuit system that uses CO ₂ as a refrigerant,
The refrigerant flows along the refrigerant line (23) through the compressor (22) and the gas cooler (24), and the internal heat exchanger (26) and the accumulator (28) are combined into one component. The refrigerant that has entered the high-pressure inlet (25) of the element and thus has passed through the internal heat exchanger (26) on the high-pressure side is intermediately stored in the accumulator (28) on the low-pressure side and is taken out from the accumulator. The refrigerant lines (23) located at the high-pressure outlets (32, 33) of the combination component (27) after being in thermal contact with the refrigerant and thus passing through the internal heat exchanger (26) are mutually connected. The refrigerant line (23), which is switched in parallel, is divided into two separate branches (34, 35), each branch being an expansion member (36, 37) and the expansion member (36, 35). 7) and the branch portions (34, 35) of the refrigerant line (23) that are switched in parallel with each other, both of the evaporators (38, 39). ) Through the low pressure inlets (40, 41) of the combination component (27) to the accumulator (28), so that the intermediate stored refrigerant passes along the refrigerant line (23). Can reach the compressor (22) again through the low pressure outlet (42) of the combination component (27);
The refrigerant circuit system (1) characterized by the above-mentioned. The combination component (27) including the internal heat exchanger (26) and the accumulator (28) and the two branch portions (34, 35) switched in parallel to the combination component (27) A manifold (29) is arranged for connection,
The refrigerant circuit system (1) according to claim 1. A connecting portion for connecting the manifold (29) to the first expansion member (36) and the first evaporator (38) at the first branch portion (34) of the refrigerant line (23). A first double connection element (30) having
The refrigerant circuit system (1) according to claim 2. A connecting portion for connecting the manifold (29) to the second expansion member (37) and the second evaporator (39) at the second branch portion (35) of the refrigerant line (23). A second double connection element (31) having
The refrigerant circuit system (1) according to claim 3. The first double connection element (30) is arranged in parallel and opposite to the second double connection element (31);
The refrigerant circuit system (1) according to claim 4. The first double connection element (30) and the second double connection element (31) are arranged parallel to each other;
The refrigerant circuit system (1) according to claim 4. Each of the double connection elements (30, 31) requires one screw for fastening,
The refrigerant circuit system (1) according to any one of claims 3 to 6. Each of the double connection elements (30, 31) requires two screws for fastening,
The refrigerant circuit system (1) according to any one of claims 3 to 7.

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