Communication portion and thermal management assembly

Abstract

A communication part and a heat management assembly with the same, the communication part comprises a main body part, at least a material of the main body part is a metal material, the main body part has a first flow channel and a second flow channel, a temperature of working medium flowing through the first flow channel is higher than that of working medium flowing through the second flow channel, the communication part comprises a heat insulation part, the heat insulation part is located between the first flow channel and the second flow channel, and the heat insulation part comprises a groove or / and a hollow part; the communication part is of a metal material, heat transfer between the first flow channel and the second flow channel is reduced by arranging the heat insulation part between the first flow channel and the second flow channel, and the heat insulation part is arranged as the groove or the hollow part formed in the communication part, so that the structure is simple and the cost is low.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more specifically to a connecting part. Background Technology

[0002] Vehicles have thermal management systems, which contain many components, have complex connections, and occupy a large space. While ensuring the functionality of the components, the design of connecting parts can integrate some components into a single assembly, making the thermal management assembly compact and easy to install. However, due to the different temperatures of the working medium in the thermal management system, heat transfer may occur. How to design connecting parts to reduce heat transfer problems is a technical issue. Summary of the Invention

[0003] The purpose of this application is to provide a connecting part that can connect components in a thermal management system to form an integrated assembly, while reducing heat conduction problems.

[0004] To achieve the above objectives, this application adopts the following technical solution: a connecting portion, the connecting portion including a main body portion, the main body portion being made of a metal material, the connecting portion having a first flow channel and a second flow channel, at least the first flow channel and the second flow channel being located in the main body portion, the temperature of the working medium flowing through the first flow channel being higher than the temperature of the working medium flowing through the second flow channel, the main body portion including a heat insulation portion, the heat insulation portion being located between the first flow channel and the second flow channel, the heat insulation portion including a groove and / or a hollow portion.

[0005] This application also discloses a thermal management component, including a plate heat exchanger assembly and a connecting part. The connecting part has an interface and a flow channel. The interface can communicate with the internal channel of the plate heat exchanger assembly through the flow channel. The flow channel includes a first flow channel and a second flow channel. The working medium temperatures of the first flow channel and the second flow channel are different. The connecting part is the connecting part described above.

[0006] The main body of the connecting part in this application is made of metal. By setting a heat insulation part between the first flow channel and the second flow channel, the heat transfer between the first flow channel and the second flow channel is reduced. At the same time, the heat insulation part is set as a groove or hollow part formed in the main body, which has a simple structure and low cost. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural diagram of a first embodiment of a thermal management component;

[0008] Figure 2 yes Figure 1 A three-dimensional structural diagram of the central connecting part from one perspective;

[0009] Figure 3 yes Figure 2A schematic diagram of the decomposed structure of the central connected component from one perspective;

[0010] Figure 4 yes Figure 2 A schematic diagram of the exploded structure of the central connected component from another perspective;

[0011] Figure 5 yes Figure 2 A front view structural diagram of the central connecting part;

[0012] Figure 6 yes Figure 5 A schematic diagram of the BB cross-section structure of the connecting part;

[0013] Figure 7 yes Figure 5 A schematic diagram of the CC cross-section structure of the connecting part;

[0014] Figure 8 yes Figure 4 A three-dimensional structural diagram of the main body from one perspective;

[0015] Figure 9 yes Figure 4 A three-dimensional structural diagram of the main body from another perspective;

[0016] Figure 10 yes Figure 8 Schematic diagram of the AA section structure of the main body;

[0017] Figure 11 yes Figure 8 Schematic diagram of the CC cross-section structure of the main body;

[0018] Figure 12 for Figure 8 A perspective structural diagram of the main body;

[0019] Figure 13 This is a three-dimensional structural diagram of a second embodiment of the thermal management component;

[0020] Figure 14 yes Figure 13 A schematic diagram of the decomposed structure of the central connected component from one perspective;

[0021] Figure 15 yes Figure 13 A top view of the central connecting section;

[0022] Figure 16 yes Figure 15 Schematic diagram of the BB cross-section structure of the central connecting part;

[0023] Figure 17 yes Figure 15 Schematic diagram of the AA section structure of the central connecting part;

[0024] Figure 18 yes Figure 15 Schematic diagram of the CC cross-section structure of the central connecting part;

[0025] Figure 19 yes Figure 14 A perspective view of the three-dimensional structure of the first embodiment of the main body;

[0026] Figure 20 yes Figure 14 A three-dimensional structural view of the main body from another perspective in the first embodiment of the main body;

[0027] Figure 21 yes Figure 20 A perspective structural diagram of the main body;

[0028] Figure 22 yes Figure 14 A perspective view of the structure of the second embodiment of the main body;

[0029] Figure 23 yes Figure 22 A perspective structural diagram of the main body. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0031] The connecting portion of this application can be applied to a thermal management component, which can be applied to a vehicle thermal management system. This thermal management system may include a compressor, a condenser, an evaporator, and the thermal management component. (See reference...) Figure 1 and Figure 13 The thermal management component 1010 includes a liquid storage section 3, a plate heat exchange component 56, and a connecting section 8. It may also include a first valve section 11 and a second valve section 12. The connecting section 8 has an interface and a flow channel. The interface can communicate with the channel inside the plate heat exchange component 56 and / or the liquid storage section 3 through the flow channel. The first valve section 11 and the second valve section 12 can adjust the flow rate, connection, and cut-off of the working medium in the corresponding flow channel. The flow channel includes at least a first flow channel and a second flow channel. The temperature of the working medium flowing through the first flow channel is higher than the temperature of the working medium flowing through the second flow channel. In other words, when the thermal management component is working, there is a temperature difference between the first flow channel and the second flow channel.

[0032] See Figure 1The plate heat exchanger assembly 56 includes an intermediate heat exchanger 5, a cooler 6, and an internal connecting bridge 506. The internal channels of the cooler 6 include refrigerant channels and coolant channels. The internal channels of the intermediate heat exchanger and the refrigerant channels of the cooler are connected through the internal connecting bridge 506. The working medium in the intermediate heat exchanger is the same, for example, both are refrigerants, but at different temperatures, thus allowing heat exchange within the intermediate heat exchanger. Of course, the plate heat exchanger assembly 56 may also include only the intermediate heat exchanger 5 and the cooler 6, without the internal connecting bridge, in which case the internal channels of the intermediate heat exchanger are directly connected to the refrigerant channels of the cooler.

[0033] See Figure 2 , Figure 3 as well as Figure 4 The connecting part 8 can be a separate structure or a single structure. In this embodiment, the connecting part 8 is a separate structure, and the material of the connecting part can be metal or plastic.

[0034] When the connecting part 8 is a split structure, the connecting part 8 includes a main body 81, a first transition part 82, and a second transition part 83. The first transition part 82 is located at one end of the main body 81, and the second transition part 83 is located at the other end of the main body 81. That is, the first transition part 82 and the second transition part 83 are located at different ends of the main body 83, and both the first transition part 82 and the second transition part 83 are fixedly connected to the main body 81. (See also...) Figure 14 The connecting part 8 also includes a third transition part 87 and a fourth transition part 88, both of which are fixedly connected to the main body part 81. In the above split structure, the main body part can be made of metal. When the main body part is made of metal, a heat insulation part can be provided as needed to reduce heat conduction in the first and second flow channels.

[0035] See Figure 3 and Figure 4 The first adapter portion 82 includes a first body portion 821 and a first connecting portion 822. The first connecting portion 822 protrudes from one side of the first body portion 821 and can extend into the channel of the main body portion 81. The first body portion 821 can abut against the main body portion 81. The connecting portion 8 also includes a first sealing ring 84, which is sleeved on the outer periphery of the first connecting portion 822. The first sealing ring 84 is located between the first connecting portion 822 and the main body portion 81 that forms part of the first flow channel, and can seal the connection between the first adapter portion 82 and the main body portion 81. The first connecting portion 822 has a first through hole 8221, and the main body portion 81 has a first threaded hole 811. The connecting portion includes a first screw (not shown in the figure), which can pass through the first through hole 8221 and be threadedly connected to the main body portion 81 through the first threaded hole 811. The first flow channel 801 has a first interface 10 formed in the first adapter portion 82.

[0036] The second adapter portion 83 includes a second body portion 831 and a second connecting portion 832. The second connecting portion 832 protrudes from the second body portion 831 and can extend into the channel of the main body portion 81. The second body portion 831 can abut against the main body portion 81. The connecting portion 8 includes a second sealing ring 85, which is fitted around the outer periphery of the second connecting portion 832 and is located between the second connecting portion 832 and the main body portion 81 that forms part of the first flow channel. The second connecting portion 832 has a second through hole 8321, and the main body portion 81 has a second threaded hole 812. The connecting portion 8 includes a second screw (not shown in the figure), which passes through the second through hole 8321 and is threadedly connected to the main body portion 81 through the second threaded hole 812. The first flow channel 801 has a second interface 20 formed in the second adapter portion.

[0037] See Figure 14 The second flow channel 802 forms a third interface 40 at the third transition portion 87, and the third flow channel 803 forms a fourth interface 50 at the fourth transition portion 88. The third transition portion 87 includes a third body portion 871 and a third connecting portion 872. The third connecting portion 872 protrudes from the third body portion 871 and can extend into the channel of the main body portion 81. The third body portion 871 can abut against the main body portion 81. The connecting portion 8 includes a third sealing ring 870. The third sealing ring 870 is sleeved on the outer periphery of the third connecting portion 872. The third sealing ring 870 is located between the third connecting portion 872 and the main body portion 81 that forms part of the second flow channel, and can seal the connection between the third transition portion 87 and the main body portion 81. The fourth transition portion 88 includes a fourth body portion 881 and a fourth connecting portion 882. The fourth connecting portion 882 protrudes from the fourth body portion 881 and can extend into the channel of the body portion 81. The fourth body portion 881 can abut against the body portion 81. The connecting portion 8 includes a fourth sealing ring 880, which is fitted around the outer periphery of the fourth connecting portion 882. The fourth sealing ring 880 is located between the fourth connecting portion 882 and the body portion 81 that forms part of the second flow channel, and can seal the connection between the fourth transition portion 88 and the body portion 81. Figure 14 As shown, in this embodiment, the third body part 871 is integrally formed with the first body part 821, and the second body part 831 is integrally formed with the fourth body part 881. Alternatively, the first connecting part 82 and the third connecting part 87 are integral structures, and the second connecting part 83 and the fourth connecting part 88 are integral structures. The first connecting part 82 and the third connecting part 87 are arranged side by side, and the second connecting part 83 and the fourth connecting part 88 are arranged side by side. In this way, the first connecting part and the third connecting part are assembled with the main body as a whole, and the second connecting part and the fourth connecting part are assembled with the main body as a whole, which simplifies the process. In order to reduce the heat conduction of the connecting part to the first flow channel and the second flow channel, the connecting part can be made of plastic material, or the connecting part can be designed with heat insulation.

[0038] The first flow channel 801 and the second flow channel 802 in the connecting portion 8 are not connected internally. At least a portion of the axis of the first flow channel 801 and at least a portion of the axis of the second flow channel 802 are arranged parallel to each other. In other words, the first flow channel 801 forms a first interface 10 in the first transition portion 82, and a second interface 20 in the second transition portion 83. The orientation of the first interface 10 can be adjusted by adjusting the position of the first transition portion 82 relative to the main body portion 81, and the orientation of the second interface 20 can be adjusted by adjusting the position of the second transition portion 83 relative to the main body portion 81. This allows the first interface 10 and the second interface 20 to be positioned facing the corresponding connection end of the system, enabling more flexible connection to the thermal management system. (See also...) Figure 1 In this embodiment, both the first interface 10 and the second interface 20 face upwards, facilitating the connection of the thermal management system from the upper part of the thermal management component to the lower part of the thermal management component. Of course, the first interface 10 can also face downwards, forwards, or backwards, and the second interface 20 can also face downwards, forwards, or backwards, matching the interface positions of the thermal management system. In this embodiment, upwards, downwards, forwards, and backwards are... Figure 1 The directions shown are for reference only.

[0039] See Figure 6 The first flow channel 801 includes a first section 8011, a second section 8012, and a third section 8013. The first section 8011 is formed in the main body, the second section 8012 is formed in the first transition section 82, and the third section 8013 is formed in the second transition section 83. The main body 81 has a first mounting hole 841 and a second mounting hole 842. Both the first mounting hole and the second mounting hole are in communication with the first flow channel. A portion of the first valve is located in the first mounting hole, and a portion of the second valve is located in the second mounting hole. The first section 8011 is located between the first mounting hole 841 and the second mounting hole 842. The second section 8012 is located outside the first mounting hole 841, and the third section 8013 is located outside the second mounting hole 842. The connecting section 8 includes a first inlet 30, which is in communication with the first section 8011. The first inlet 30 is located between the first mounting hole 841 and the second mounting hole 842, and is located on the side wall of the connecting section.

[0040] The second segment 8012 includes a first sub-segment 803 and a second sub-segment 804, and the third segment 8013 includes a third sub-segment 805 and a fourth sub-segment 806. The extension direction of the first sub-segment 803 is the same as the extension direction of the first segment 8011, and the extension direction of the third sub-segment 805 is the same as the extension direction of the first segment 8011. The first sub-segment 803 and the second sub-segment 804 are arranged perpendicularly, and the third sub-segment 805 and the fourth sub-segment 806 are arranged perpendicularly. The second sub-segment 804 forms a first interface 10 in the first transition part 82, and the fourth sub-segment 806 forms a second interface 20 in the second transition part 83.

[0041] See Figure 12 The first section 8011 of the first flow channel 801 includes a first channel 71 and / or a second channel 72. The first channel 71 communicates with the first mounting hole 841, and the second channel 72 communicates with the second mounting hole 842. The first channel is located on one side of the centerline of the inlet 30, and the second channel is located on the other side of the centerline of the inlet 30, with the centerline of the inlet 30 as the dividing line. The interface of the connecting part includes a first interface 10, a second interface 20, a first inlet 30, a second inlet 8021, and a third outlet 8022. The first interface 10 and the second interface 20 communicate with the first flow channel 801, the second inlet 8021 and the third outlet 8022 communicate with the second flow channel 802, and the first inlet 30 communicates with the first flow channel 801. The connecting part 8 also includes a third mounting hole 843. Figure 1 In the embodiment of the thermal management component, the third mounting hole 843 communicates with the second flow channel, and a sensor 70 (such as...) Figure 13 It is installed through the third mounting hole 843 and connected to the connecting part, enabling the detection of parameters of the working medium in the second flow channel, such as temperature; Figure 13 In the implementation of the thermal management component, the third mounting hole communicates with the transition channel, and a sensor 70 (such as...) Figure 13 It is installed with the connecting part through the third mounting hole 843, and can detect the parameters of the working medium in the transition channel, such as temperature.

[0042] See Figure 12 In this embodiment, when the main body 81 of the connecting portion 8 is made of metal profile, due to the temperature difference between the first flow channel and the second flow channel, a heat insulation portion is provided in the connecting portion to reduce heat conduction between the first flow channel and the second flow channel. The heat insulation portion is located between adjacent first and second flow channels. In this embodiment, the heat insulation portion includes a first heat insulation portion 80, which is located between the first channel 71 and the second flow channel 802. The first heat insulation portion 80 includes a first groove 91 and / or a first hollow portion 92. This heat insulation portion not only reduces heat conduction between the first and second flow channels, but also reduces the weight of the connecting portion and the material cost. Furthermore, this heat insulation portion structure has minimal impact on other functions of the original structure. Of course, the materials of the first, second, third, and fourth transition parts can be the same as those of the main body, or they can be different from those of the main body. For example, the materials of the first, second, third, and fourth transition parts can be injection molded plastic materials.

[0043] See Figure 12 and Figure 21The central axis of the second flow channel is parallel to the central axis of the first segment of the first flow channel. The connecting portion 8 has a first spacing portion 90, which separates the second flow channel from the first flow channel by a set distance. The first spacing portion 90 forms part of the wall of the first flow channel and part of the wall of the second flow channel. The first heat insulation portion 80 is located in the first spacing portion 90. The first heat insulation portion 80 includes a first hollow portion 92 and a first groove 91. One opening of the first hollow portion 92 is located at the first end of the connecting portion, and the opening of the first groove 91 is located at the second end of the connecting portion. The first hollow portion 92 and the first groove 91 are connected. The first end and the second end do not intersect. In this embodiment, the non-intersection of the first end and the second end means that the main body of the first end and the main body of the second end are parallel. The parallelism of the main body of the first end and the main body of the second end means that in the actual product, although the first end and the second end may have local depressions or protrusions due to process requirements, the main body is flat and parallel. The first mounting hole and the second mounting hole are located at the first end, the second inlet and the third outlet are located at the second end, the third mounting hole is located on the side wall of the main body, the first interface is located at the first adapter, the second interface is located at the second adapter, and the first inlet is located on the side wall of the main body.

[0044] Combination Figures 8 to 12Along the circumferential extension direction of the first flow channel, the length L1 of the first hollow portion is less than the length L2 of the first groove, the width of the first hollow portion is equal to the width of the first groove, or in other words, the length L1 of the opening of the first hollow portion is less than the length L2 of the opening of the first groove, the width of the first hollow portion 92 is equal to the width of the first groove 91, and the width of the first heat insulation portion 80 depends on the distance between the first flow channel 801 and the second flow channel 802. The greater the distance between the first flow channel 801 and the second flow channel 802, the greater the width of the first heat insulation portion 80. On one side of the connecting portion, the end 851 of the connecting portion forming the second flow channel protrudes from the end 852 of the connecting portion forming the first flow channel. That is, the connecting portion has a stepped portion on one side, and the ends 851 and 852 of the connecting portion form stepped portions. The end 853 of the connecting portion forming the first groove is aligned with the end 851 of the connecting portion forming the first flow channel. The length of the first groove 91 is greater than the length of the first channel 71 of the first flow channel. The first hollow portion 92 is projected onto the first groove 91. The projection of the first hollow portion is located in the area of ​​the first groove. The first hollow portion is located between the first channel 71 and the second flow channel 802 of the first flow channel. In this way, a first heat insulation part is formed between the first end face and the second end face of the connecting part, which can dissipate heat with the air. At the same time, the heat transfer coefficient of air is lower than that of metal, reducing the heat transfer between the first flow channel and the second flow channel. Meanwhile, the opening formed by the first hollow part on the first end face is smaller than the opening formed by the first groove on the second end face, so that the first end face can be used to arrange the mounting part and other structures, improving the space utilization. Of course, the first hollow part can also be located on the second end face, and the first groove part can be located on the first end face, improving the utilization of the second end face.

[0045] See Figures 13 to 23 The flow channel also includes a third flow channel 803, which is arranged parallel to the second channel 72 of the first flow channel 801. The temperature of the working medium flowing through the second channel 72 of the first flow channel 801 is higher than the temperature of the working medium flowing through the third flow channel. The heat insulation part includes a second heat insulation part 100, which is located between the third flow channel 803 and the second channel 72 of the first flow channel 801. The second heat insulation part 100 includes a second groove 93 and / or a second hollow part 94. Specifically, the opening of the second hollow part 94 is in the same direction as the opening of the first hollow part 92, that is, the opening of the second hollow part 94 is located at the first end of the connecting part. The opening of the second groove 93 is the same as the opening of the first groove 91, that is, the second groove 93 is located at the second end of the connecting part. The second hollow part 94 and the second groove 93 are interconnected.

[0046] exist Figures 14-21In this embodiment, the inlet 30 is located on the side wall of the connecting part and is connected to the first flow channel. The first hollow part 92 and the second hollow part 94 are connected and are marked with 98 in the figure. The first groove 91 and the second groove 93 are connected and are marked with 89 in the figure. The total length of the first hollow part 92 and the second hollow part 94 is less than the total length of the first groove 91 and the second groove 93. The hollow part is projected onto the groove, and the projection of the hollow part is located in the area of ​​the groove. The end of the first flow channel and the end of the second flow channel are aligned on one side of the connecting part, and the other end of the first flow channel and the end of the third flow channel are aligned on the other side of the connecting part. The first mounting hole 841, the second mounting hole 842, and the third mounting hole 843 are located at the first end of the connecting portion; the connecting portion 8 has a first outlet 8051 and a second outlet 8052, the first outlet 8051 and the second outlet 8052 are located at the second end of the connecting portion, the first outlet 8051 is connected to the second flow channel 802, the second outlet 8052 is connected to the third flow channel 803, the working medium enters the second flow channel 802 through the third interface 40, the working medium in the second flow channel 802 leaves the second flow channel 802 through the first outlet 8051, the working medium enters the third flow channel 803 through the fourth interface 50, and the working medium in the third flow channel 803 leaves the third flow channel 803 through the second outlet 8052.

[0047] See Figure 18 The connecting part has a transition channel 805, and a third mounting hole 843 communicates with the transition channel 805. The connecting part has a second inlet 8021 and a third outlet 8022, both of which are connected to the transition channel 805. The working medium enters the transition channel 805 from the second inlet 8021 and leaves the transition channel 805 through the third outlet 8022. The sensing element 70 is assembled with the connecting part 8 through the third mounting hole 843 and can detect the temperature of the working medium in the transition channel 805.

[0048] exist Figures 22-23 In the embodiment, the first inlet 30 is located at the first end. In order to avoid the first inlet 30, the first hollow part 92 and the second hollow part 94 are spaced apart by a certain distance. The first groove 91 and the second groove 92 are connected. Other structures are not described in detail.

[0049] exist Figures 1 to 12In this embodiment, when the thermal management component is working, the high-temperature and high-pressure working medium enters the first flow channel 801 from the first inlet 30. The first valve section 11 and the second valve section 12 connect the first channel 71 or the second channel 72 according to the control command, and then the working medium leaves the first flow channel 801 from the first interface 10 or the second interface 20. The connecting part has a second inlet 8021 and a third outlet 8022. Both the second inlet 8021 and the third outlet 8022 are connected to the second flow channel 802. The working medium in the liquid storage section 3 can enter the second flow channel 802 of the connecting part 8 through the second inlet 8021. The third outlet 8022 serves as the outlet of the second flow channel. The third outlet 8022 can connect to the channel of the inner connecting bridge 506. The working medium entering the inner connecting bridge 506 can enter the cooler 6 or the intermediate heat exchanger 5.

[0050] exist Figures 13-23 In the implementation method, when the thermal management component is working, the high-temperature and high-pressure working medium enters the first flow channel 801 from the first inlet 30. The first valve section 11 and the second valve section 12 connect the first channel 71 or the second channel 72 according to the control command, and then the working medium leaves the first flow channel 801 from the first interface 10 or the second interface 20. The low-temperature and high-pressure working medium can enter the second flow channel 802 from the third interface 40, or enter the third flow channel 803 through the fourth interface 50. The working medium in the second flow channel 802 can enter the liquid storage section 3 from the first outlet 8051. The working medium in the third flow channel 803 can enter the liquid storage section 3 from the second outlet 8052. The working medium in the liquid storage section enters the transition channel 805 of the connecting section through the second inlet 8021. The transition channel 805 is connected to the third outlet 8022. The third outlet 8022 can be connected to the channel of the inner connecting bridge 506. The working medium entering the inner connecting bridge 506 can enter the cooler 6 or the intermediate heat exchanger 5.

[0051] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A communication section, characterized by: The communication part includes a main body part, the material of the main body part is metal material, the communication part has a first flow channel and a second flow channel, at least the first flow channel and the second flow channel are located in the main body part, the temperature of the working medium flowing through the first flow channel is higher than the temperature of the working medium flowing through the second flow channel, the main body part includes a heat insulation part, the heat insulation part is located between the first flow channel and the second flow channel, the heat insulation part includes a first heat insulation part, the first heat insulation part includes a first hollow part and a first groove, the opening of the first hollow part is located at the first end of the main body part, the opening of the first groove is located at the second end of the main body part, the first hollow part is through the first groove, the main body of the first end is arranged in parallel with the main body of the second end.

2. The communication portion according to claim 1, characterized by: The main body part has a spacing part, the spacing part sets a distance between the second flow channel and the first flow channel, the spacing part forms part of the wall of the first flow channel and part of the wall of the second flow channel, and the heat insulation part is located in the spacing part.

3. The communication portion according to claim 2, characterized by: Along the extension direction of the first flow channel, the extension length of the first hollow part is less than the extension length of the first groove, and the length of the opening of the first hollow part is less than the length of the opening of the first groove.

4. The communication portion according to claim 3, characterized by: On one side of the main body part, the end of the main body part forming the second flow channel and the end of the main body part forming the first flow channel form a stepped structure, the end of the main body part forming the first groove is aligned with the end of the main body part forming the first flow channel, the length of the first groove is greater than the length of the first flow channel, the first hollow part is projected to the first groove, the projection of the first hollow part is located in the area of the first groove, and the first hollow part is located between the first flow channel and the second flow channel.

5. The communication portion according to claim 4, wherein: The communication part includes a first interface, a second interface, a first inlet, a second inlet, a third outlet, a first mounting hole, a second mounting hole and a third mounting hole, the first inlet, the first interface, the second interface, the first mounting hole and the second mounting hole are in communication with the first flow channel, and the second inlet, the third outlet and the third mounting hole are in communication with the second flow channel; the first mounting hole and the second mounting hole are located at the first end, the second inlet and the third outlet are located at the second end, and the first inlet is located at the side wall of the main body part; the communication part further includes a first adapter and a second adapter, the first adapter and the second adapter are fixedly connected with the main body part, the first interface is located in the first adapter, and the second interface is located in the second adapter.

6. The communication portion according to claim 3, wherein: The communication part further has a third flow channel, the third flow channel is arranged in parallel with the first flow channel, the temperature of the working medium flowing through the first flow channel is higher than the temperature of the working medium flowing through the third flow channel, the heat insulation part further includes a second heat insulation part, the second heat insulation part is located between the first flow channel and the third flow channel, and the second heat insulation part includes a second groove and / or a second hollow part.

7. The communication portion according to claim 6, characterized by: The second heat insulation part comprises a second hollow part and a second groove, the opening of the second hollow part is located at the first end of the main part, the opening of the second groove is located at the second end of the main part, the second hollow part and the second groove are through, and the first end and the second end do not intersect; the opening of the first hollow part and the opening of the second hollow part are located at the same end of the main part, and the opening of the first groove and the opening of the second groove are located at the same end of the main part.

8. The communication portion according to claim 7, characterized by: The communication part comprises a first inlet, a second inlet, a first interface, a second interface, a third interface, a fourth interface, a first outlet, a second outlet, a third outlet, a first mounting hole, a second mounting hole and a third mounting hole, the first inlet, the first interface, the second interface, the first mounting hole and the second mounting hole are in communication with the first flow channel, the third interface and the first outlet are in communication with the second flow channel, and the fourth interface and the second outlet are in communication with the third flow channel; the communication part further comprises a transition channel, the transition channel is located between the second flow channel and the third flow channel, the third mounting hole is in communication with the transition channel, and the second inlet and the third outlet are in communication with the transition channel; the openings of the first inlet, the first mounting hole, the second mounting hole and the third mounting hole are located at the first end of the main part; the first outlet and the second outlet are located at the second end of the main part; the first hollow part and the second hollow part are spaced apart by a certain distance, and the first groove and the second groove are in communication.

9. The communication portion according to claim 7, wherein: The communication part comprises a first inlet, a second inlet, a first interface, a second interface, a third interface, a fourth interface, a first outlet, a second outlet, a third outlet, a first mounting hole, a second mounting hole and a third mounting hole, the first inlet, the first interface, the second interface, the first mounting hole and the second mounting hole are in communication with the first flow channel, the third interface and the first outlet are in communication with the second flow channel, and the fourth interface and the second outlet are in communication with the third flow channel; the communication part further comprises a transition channel, the transition channel is located between the second flow channel and the third flow channel, the third mounting hole is in communication with the transition channel, and the second inlet and the third outlet are in communication with the transition channel; the openings of the first inlet, the first mounting hole, the second mounting hole and the third mounting hole are located at the first end of the main part; the first outlet and the second outlet are located at the second end of the main part; the first inlet is located on the side wall of the main part, the first hollow part and the second hollow part are in communication, and the first groove and the second groove are in communication.

10. A heat management assembly comprising a plate heat exchanger assembly and a communication part, the communication part having an interface and flow channels, the interface being capable of communicating with channels inside the plate heat exchanger assembly through the flow channels, the flow channels comprising a first flow channel and a second flow channel, the working medium temperatures of the first flow channel and the second flow channel being different, and the communication part being any one of the communication parts according to claims 1 to 9.

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