Thermal management device for vehicle

Abstract

Provided in the present disclosure is a thermal management device for a vehicle. The thermal management device comprises a fluid element and a flow channel plate. The flow channel plate comprises a body portion, a first connection portion provided with a first connection channel, a second connection portion provided with a second connection channel, and a mounting portion provided with a first internal channel and a second internal channel, wherein the first connection portion is connected to the body portion and the mounting portion, such that the first connection channel is in fluid communication with the body portion and the first internal channel; and the second connection portion is connected to the body portion and the mounting portion, such that the second connection channel is in fluid communication with the body portion and the second internal channel. The fluid element is mounted on the mounting portion, and is in fluid communication with the first internal channel and the second internal channel.

Description

Vehicle thermal management device Technical Field

[0001] This disclosure relates to a thermal management device for a vehicle. Background Technology

[0002] Currently, the application of new energy vehicles is becoming increasingly widespread in order to protect the environment. In electric vehicles, which are considered new energy vehicles, the electric drive mechanism generates a large amount of heat when supplying power, leading to increased resistance. This reduces discharge and charging efficiency, thus shortening battery life. Prolonged exposure to high temperatures can cause batteries to explode. Furthermore, prolonged exposure to low temperatures results in unnecessary energy loss. Therefore, electric vehicles require additional consideration of battery and motor cooling, making their thermal management systems more complex and involving more piping than those of traditional gasoline vehicles. However, the limited space in a vehicle's overall layout presents challenges and difficulties in designing the thermal management system for new energy vehicles.

[0003] Typically, thermal management integrated modules are used to solve the above problems. However, known thermal management integrated modules still suffer from low integration and high cost.

[0004] Utility Model Content

[0005] Therefore, the object of this disclosure is to provide a thermal management device for a vehicle that has a high degree of integration and low cost.

[0006] The above objectives are achieved through the vehicle's thermal management system described below.

[0007] This disclosure provides a thermal management device for a vehicle, comprising: a fluid element and a flow channel plate; wherein the flow channel plate has a main body; a first connecting portion having a first connecting channel; a second connecting portion having a second connecting channel; and a mounting portion having a first internal channel and a second internal channel; wherein the first connecting portion is connected to the main body and the mounting portion respectively, such that the first connecting channel fluidly communicates with the main body and the first internal channel; the second connecting portion is connected to the main body and the mounting portion respectively, such that the second connecting channel fluidly communicates with the main body and the second internal channel; the fluid element is mounted on the mounting portion and fluidly communicates with the first internal channel and the second internal channel respectively.

[0008] The thermal management device according to this disclosure may also have one or more of the following features, individually or in combination.

[0009] In one embodiment, the main body has a first portion extending along a first direction and a second portion extending along a second direction transverse to the first direction; the first connecting portion is connected to the first portion and the mounting portion respectively, so that the first connecting channel fluidly communicates the first portion and the first internal channel; the second connecting portion is connected to the second portion and the mounting portion respectively, so that the second connecting channel fluidly communicates the second portion and the second internal channel.

[0010] In one embodiment, the fluid element includes a drying bottle.

[0011] In one embodiment, the mounting portion has a mounting surface for mounting the fluid element; wherein the first internal channel and the second internal channel extend to the mounting surface.

[0012] In one embodiment, the mounting surface is parallel to the extension plane of the main body.

[0013] In one embodiment, both the first connecting portion and the second connecting portion are located on the extension plane of the main body portion.

[0014] In one embodiment, the first connecting portion and the second connecting portion are spatially separated from each other by a hollow portion on the flow channel plate; wherein the hollow portion is formed by the first connecting portion, the second connecting portion, the main body portion and the mounting portion.

[0015] In one embodiment, the hollowed-out portion is formed by the first connecting portion, the second connecting portion, the first part, the second part, and the mounting portion.

[0016] In one embodiment, the first connecting portion, the second connecting portion, the mounting portion, and the main body portion form an integral component.

[0017] In one embodiment, the first connection channel and / or the second connection channel respectively include a groove disposed on the corresponding connection portion and a cover plate for covering the groove.

[0018] In one embodiment, the groove is open in a direction away from the mounting surface.

[0019] In one embodiment, the thermal management device further includes a multi-way valve, the valve chamber of which is at least partially formed on the main body and is in fluid communication with the second connection channel.

[0020] In one embodiment, the main body has a first portion extending along a first direction and a second portion extending along a second direction transverse to the first direction; the first connecting portion is connected to the first portion and the mounting portion respectively, so that the first connecting channel fluidly communicates the first portion and the first internal channel; the second connecting portion is connected to the first portion and the mounting portion respectively, so that the second connecting channel fluidly communicates the first portion and the second internal channel; the valve chamber of the multi-way valve is located in the second portion.

[0021] In one embodiment, the first portion has a first edge and a second edge transverse to the first edge; the first edge and the second edge define a corner of the first portion; wherein the first connecting portion extends from the first edge in a direction away from the first portion, and the second connecting portion extends from the second edge in a direction away from the first portion.

[0022] The advantages of this disclosed technical solution are: by setting a "U"-shaped mounting structure on the flow channel plate to install fluid components, such as drying bottles, the flow channel plate has higher strength, a more compact structure, and a higher degree of integration. Furthermore, the device is easy to manufacture, convenient to assemble, and inexpensive. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments of this disclosure will be briefly described below. The drawings are merely illustrative of some embodiments of this disclosure and are not intended to limit the scope of all embodiments of this disclosure. In the drawings:

[0024] Figure 1 shows a schematic diagram of a vehicle thermal management device according to an embodiment of the present disclosure;

[0025] Figure 2 shows a plan view of the flow channel plate of a vehicle thermal management device according to an embodiment of the present disclosure;

[0026] Figure 3 shows a perspective view of the flow channel plate of a vehicle thermal management device according to an embodiment of the present disclosure;

[0027] Figure 4 shows a schematic diagram of the back side of the flow channel plate of a vehicle thermal management device according to an embodiment of the present disclosure;

[0028] Figure 5 shows a schematic diagram of the groove of the flow channel plate of a vehicle thermal management device according to an embodiment of the present disclosure;

[0029] Figure 6 shows a schematic diagram of a vehicle thermal management device according to another embodiment of the present disclosure;

[0030] Figure 7 shows a plan view of the flow channel plate of a vehicle's thermal management device according to an embodiment of the present disclosure; and

[0031] Figure 8 shows a schematic diagram of the back side and groove of the flow channel plate of a vehicle thermal management device according to an embodiment of the present disclosure. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0033] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not necessarily indicate a quantity limitation. The terms “comprising,” “including,” or “having,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “connected” or “connected,” and similar terms are not limited to the physical or mechanical connection or connection shown in the drawings, but may include equivalent connections or connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0034] The following describes in detail, with reference to Figures 1 to 8, various embodiments of a thermal management device for a vehicle and a flow channel plate for the thermal management device according to embodiments of the present disclosure. The thermal management device according to the present disclosure is used to distribute a heat transfer fluid, which may be, for example, a refrigerant as described below. The thermal management device may be mounted on the vehicle body. For example, the vehicle body includes a frame, and the thermal management device may be mounted on the frame. The thermal management device according to the present disclosure can be used in new energy vehicles, such as electric vehicles, hybrid vehicles, etc. The thermal management device includes a refrigerant circuit for refrigerant flow and a coolant circuit for coolant flow. The refrigerant may be, for example, Freon or propane, and the coolant may be, for example, a mixture of water and ethylene glycol.

[0035] As shown in Figures 1 and 6, the thermal management device may include a flow channel plate, a multi-way valve 100, and a one-way valve 200. The flow channel plate, also known as a manifold plate, has multiple flow channels through which refrigerant can flow. Different thermal management modes can be achieved by connecting the multiple flow channels to the multi-way valve 100 and the one-way valve 200. The multi-way valve 100 can be a five-way or four-way valve, mounted on the flow channel plate to improve integration and reduce material and assembly costs. The one-way valve 200 can be configured to be in fluid communication with one port of the multi-way valve 100. For example, as shown in Figures 2 and 7, the valve cavity 10 of the multi-way valve 100 can be at least partially formed within the flow channel plate, the valve cover of the multi-way valve 100 is mounted on the flow channel plate to close the valve cavity 10, and the valve core of the multi-way valve 100 is connected to the valve cover and disposed within the valve cavity to achieve fluid communication between at least two valve ports. This configuration eliminates at least part of the valve body structure and reduces assembly steps. For example, a one-way valve 200 can be inserted into a flow channel on a flow channel plate. For example, the one-way valve 200 is disposed in a flow channel that is in fluid communication with one of the ports of the multi-way valve 100, and does not allow heat transfer fluid to flow from that port into the valve chamber 10.

[0036] For example, the flow channel plate can be a refrigerant plate. In other examples, the flow channel plate can be a coolant plate, and the heat transfer fluid flowing in its channels can be a coolant.

[0037] As shown in Figures 1 and 2, and Figures 6 and 7, the thermal management device further includes a fluid element 120, which is mounted on and in fluid communication with the flow channel plate. In one specific embodiment, the flow channel plate includes a main body 1, a first connecting portion 21, a second connecting portion 22, and a mounting portion 30. For example, the mounting portion 30 may be a block.

[0038] As shown in Figures 1 and 2, and Figures 6 and 7, the main body 1 has a first portion 2 extending along a first direction D1 and a second portion 3 extending along a second direction D2 transverse to the first direction D1. The first direction D1 can also be referred to as the length direction of the main body 1. The second direction D2 can be perpendicular to the first direction D1, and therefore can also be referred to as the width direction of the main body 1. The main body 1 has an extending plane formed by the extension of the first direction D1 and the second direction D2.

[0039] For example, the second part 3 is disposed at one end of the first part 2. Therefore, the main body 1 generally has an "L" shape. The first valve 100 and the second valve 200 described above can be disposed on the second part 3. For example, the valve chamber 10 of the first valve 100 can be located in the second part, for example, formed on the second part 3. In addition, the flow channel on the main body 1 can extend along the first direction D1 and the second direction D2, so the flow channel structure is simple and the flow resistance is small, making the flow channel plate compact and easy to process.

[0040] Referring to Figures 5 and 8, the first connecting portion 21 has a first connecting channel 26, and the second connecting portion 22 has a second connecting channel 27. As shown in Figures 3 and 7, the mounting portion 30 has a first internal channel 33 and a second internal channel 34. The first connecting portion 21 is connected to the main body portion 1 and the mounting portion 30 respectively, so that the first connecting channel 26 fluidly communicates the main body portion 1 and the first internal channel 33. The second connecting portion 22 is connected to the main body portion 1 and the mounting portion 30 respectively, so that the second connecting channel 27 fluidly communicates the main body portion 1 and the second internal channel 34. Specifically, the first or second connecting portion fluidly communicates the flow channel on the main body portion 1 with the corresponding internal channel.

[0041] As shown in Figure 3, the first connecting part 21 is connected to the first part 2 and the mounting part 30 respectively, so that the first connecting channel 26 fluidly connects the first part 2 and the first internal channel 33. The second connecting part 22 is connected to the second part 3 and the mounting part 30 respectively, so that the second connecting channel 27 fluidly connects the second part 3 and the second internal channel 34. Fluid communication with the first part 2 or the second part 3 here refers to fluid communication with the flow channels provided on the first part 2 or the second part 3. As shown in Figure 5, the first connecting channel 26 can fluidly communicate with other flow channels on the first part 2 of the main body 1. The second connecting channel 27 can fluidly communicate with one port of the multi-way valve 100.

[0042] In the examples of Figures 1 to 5, the first connecting portion 21 extends generally along the direction opposite to the first direction D1 from the first part 2, and then generally along the second direction D2. The second connecting portion 22 extends generally along the first direction D1 from the second part 3, for example from the middle edge of the second part 3, and then generally along the second direction D2.

[0043] As shown in Figure 7, the first connecting part 21 is connected to the first part 2 and the mounting part 30 respectively, so that the first connecting channel 26 fluidly connects the first part 2 and the first internal channel 33. The second connecting part 22 is connected to the first part 2 and the mounting part 30 respectively, so that the second connecting channel 27 fluidly connects the first part 2 and the second internal channel 34. Here, fluid communication with the first part 2 refers to fluid communication with the flow channels provided on the first part 2. As shown in Figure 8, the first connecting channel 26 can fluidly communicate with other flow channels on the first part 2 of the main body 1, and the second connecting channel 27 can fluidly communicate with one valve port of the multi-way valve 100.

[0044] In the examples of Figures 6 to 8, the first connecting portion 21 extends generally along a first direction D1 from the first portion 2, for example, from one end of the first portion 2, and then generally along a second direction D2. The second connecting portion 22 extends generally along the first direction D1 from the first portion 2, for example, from one edge of the first portion 2, and then generally along the second direction D2. For example, the second connecting portion 22 extends obliquely upward toward the right in Figure 7. Specifically, the first portion 2 has a first edge 41 and a second edge 42 transverse to the first edge 41, the first edge 41 and the second edge 42 defining an angle 43 of the first portion 2; the first connecting portion 21 extends from the first edge 41 in a direction away from the first portion 2, and the second connecting portion 22 extends from the second edge 42 in a direction away from the first portion 2.

[0045] The fluid element 120 can be installed in the mounting part 30 and is in fluid communication with the first internal channel 33 and the second internal channel 34 respectively. By providing the mounting part 30, the installation position of the fluid element 120 can be reasonably set, improving the integration and flexibility of the device.

[0046] In the examples of Figures 1 to 5, the mounting portion 30 may be located near the second portion 3. In the examples of Figures 6 to 8, the mounting portion 30 may be located at the end of the first portion 2 away from the second portion.

[0047] For example, fluid element 120 may include a drying bottle. The drying bottle is mounted on one side of the flow channel plate via a mounting portion 30. One end of the drying bottle engages with and communicates with the mounting portion 30. Furthermore, other fluid elements, such as heat exchangers 121, expansion valves 122 and 123, are also provided on one side of the flow channel plate. The heat exchanger 121 may be a chiller, comprising a heat exchange section connected to a refrigerant circuit and a heat exchange section connected to a coolant circuit. Expansion valves 122 and 123 are, for example, electronic expansion valves, used to throttle and expand the fluid flowing through them. In embodiments not shown, a compressor, serving as a fluid element, may also be provided on the main body 1. In the examples of Figures 1 to 5, the fluid element 120 is positioned adjacent to the second part 3, making the device more compact. In the examples of Figures 6 to 8, the fluid element 120 is positioned away from the second part and away from the heavier heat exchanger 121, resulting in a more uniform mass distribution of the thermal management device and improving the overall strength of the flow channel plate to some extent. The specific locations of various fluid elements on the flow channel plate vary depending on the situation and are not limited to those shown in Figures 1 and 6.

[0048] For example, the mounting portion 30 has a mounting surface 35 for mounting the fluid element 120. A first internal channel 33 and a second internal channel 34 extend to the mounting surface 35, respectively. The inlet and outlet of the fluid element 120 engage with the mounting surface 35, thereby communicating fluidly with the first internal channel 33 and the second internal channel 34.

[0049] For example, the mounting surface 35 is parallel to the extension plane of the main body portion 1. This enables the fluid element 120 to be mounted on one side of the main body portion 1, particularly mounted parallel to the main body portion, thereby making the structure more compact and having a higher integration degree.

[0050] For example, both the first connecting portion 21 and the second connecting portion 22 are located in the extension plane of the main body portion 1. This enables the flow channel plate not to have additional protruding portions, evenly distributes the weight as much as possible, further improves the integration degree, and makes the flow channel plate have higher strength.

[0051] For example, the first connecting portion 21 and the second connecting portion 22 are spatially separated from each other by the hollow portion 37 on the flow channel plate, as shown in FIGS. 2 and 3 and FIGS. 7 and 8. For example, the first connecting portion 21, the second connecting portion 22, the main body portion 1, and the mounting portion 30 jointly enclose the hollow portion 37, as shown in FIG. 7. For example, the first connecting portion 21, the second connecting portion 22, the first part 2, the second part 3, and the mounting portion 30 jointly enclose the hollow portion 37, as shown in FIG. 3. In this way, the first connecting portion 21, the second connecting portion 22, and the mounting portion 30 form a "ji" - shaped structure, which enhances the strength of the "L" - shaped main body portion, and further increases the structure of the flow channel plate. In addition, the hollow portion reduces the weight of the flow channel plate.

[0052] In the embodiment shown in FIG. 3, the "ji" - shaped structure is located at the corner of the "L" - shaped main body portion, thereby further enhancing the strength of the "L" - shaped main body portion.

[0053] For example, the first connecting portion 21, the second connecting portion 22, the mounting portion 30, and the main body portion 1 form an integral component. In other words, the first connecting portion 21, the second connecting portion 22, the mounting portion 30, and the main body portion 1 are integrally formed. This makes the processing simpler and the structure more compact.

[0054] As shown in FIGS. 4 and 5 and FIG. 8, the main body portion 1 includes a plate body 23 and a plurality of cover plates 24. An installation cavity 10 of the multi - way valve 100 described above is provided on one side of the plate body 23, and a plurality of grooves 25 are provided on the other side. For example, the grooves 25 are open in the direction away from the mounting surface 35 of the mounting portion 30. A part of the flow channel is the internal channel of the plate body 23, and another part of the flow channel is defined by the grooves 25 and the corresponding cover plates 24. The cover plates 24 cover the grooves 25 and are sealingly connected to the grooves 25. For example, the internal channel and the grooves 25 are integrally formed with the plate body 23. The first connecting channel 26 includes the groove 25 provided on the first connecting portion 21 and the cover plate 24 for covering the groove, and the second connecting channel 27 includes the groove 25 provided on the second connecting portion 22 and the cover plate 24 for covering the groove. In other examples, one of the first connecting channel 26 and the second connecting channel 27 can be the internal channel of the plate body 23.

[0055] For example, as shown in Figures 2 and 5 and Figures 7 and 8, the valve chamber 10 of the multi-port valve 100 included in the thermal management device is at least partially formed on the main body 1 and is in fluid communication with the second connecting channel 27. As shown in Figures 2 and 7, the multi-port valve 100 includes multiple valve ports, such as a first valve port 11, a second valve port 12, a third valve port 13, a fourth valve port 14, and a fifth valve port 15. The fifth valve port 15 is a valve chamber inlet in fluid communication with the outlet of the compressor. The fourth valve port 14 is in fluid communication with the second connecting channel 27. The first valve port 11, the second valve port 12, the third valve port 13, and the fourth valve port 14 are in fluid communication with corresponding flow channels. The valve core channel of the multi-port valve 100 is used to be in fluid communication with two of the first valve port 11, the second valve port 12, the third valve port 13, the fourth valve port 14, and the fifth valve port 15 respectively, to facilitate the implementation of different thermal management modes. For example, the multi-way valve 100 can have two operating conditions. In the first operating condition, the first valve port 11 is in fluid communication with the fifth valve port 15, the third valve port 13 is in fluid communication with the fourth valve port 14, and the second valve port 12 is blocked by the valve core. In the second operating condition, the fourth valve port 14 is in fluid communication with the fifth valve port 15, the first valve port 11 is in fluid communication with the second valve port 12, and the third valve port 13 is blocked by the valve core. Of course, other types of operating conditions are also possible.

[0056] As described above, the thermal management device of this disclosure uses a U-shaped mounting structure to install fluid components, such as dryer bottles, resulting in higher strength of the flow channel plate, a more compact structure, and a higher degree of integration. Furthermore, the thermal management device of this disclosure is easy to manufacture, convenient to assemble, and inexpensive.

[0057] The technical features disclosed above are not limited to the combinations of the disclosed features with other features. Those skilled in the art may also make other combinations of the technical features according to the purpose of the disclosure in order to achieve the purpose of this disclosure.

Claims

1. A thermal management device for a vehicle, characterized in that, The thermal management device includes: Fluid element (120) and flow channel plate; Wherein, the flow channel plate has Main body (1); The first connecting part (21) has a first connecting channel (26); The second connecting portion (22) has a second connecting channel (27); and The mounting section (30) has a first internal channel (33) and a second internal channel (34); The first connecting part (21) is connected to the main body part (1) and the mounting part (30) respectively, so that the first connecting channel (26) fluidly connects the main body part (1) and the first internal channel (33); the second connecting part (22) is connected to the main body part (1) and the mounting part (30) respectively, so that the second connecting channel (27) fluidly connects the main body part (1) and the second internal channel (34); The fluid element (120) is mounted on the mounting part (30) and is in fluid communication with the first internal channel (33) and the second internal channel (34), respectively.

2. The thermal management device according to claim 1, characterized in that, The main body (1) has a first portion (2) extending along a first direction (D1) and a second portion (3) extending along a second direction (D2) transverse to the first direction (D1); The first connecting part (21) is connected to the first part (2) and the mounting part (30) respectively, so that the first connecting channel (26) fluidly communicates the first part (2) and the first internal channel (33); the second connecting part (22) is connected to the second part (3) and the mounting part (30) respectively, so that the second connecting channel (27) fluidly communicates the second part (3) and the second internal channel (34).

3. The thermal management device according to claim 1 or 2, characterized in that, The fluid element (120) includes a drying bottle.

4. The thermal management device according to claim 1 or 2, characterized in that, The mounting portion (30) has a mounting surface (35); the mounting surface (35) is used to mount the fluid element (120); wherein the first internal channel (33) and the second internal channel (34) extend to the mounting surface (35).

5. The thermal management device according to claim 4, characterized in that, The mounting surface (35) is parallel to the extension plane of the main body (1).

6. The thermal management device according to claim 1 or 2, characterized in that, The first connecting portion (21) and the second connecting portion (22) are both located on the extension plane of the main body portion (1).

7. The thermal management device according to claim 1, characterized in that, The first connecting part (21) and the second connecting part (22) are spatially separated from each other by the hollow part (37) on the flow channel plate; wherein the hollow part (37) is formed by the first connecting part (21), the second connecting part (22), the main body part (1) and the mounting part (30).

8. The thermal management device according to claim 2, characterized in that, The first connecting part (21) and the second connecting part (22) are spatially separated from each other by the hollow part (37) on the flow channel plate; wherein the hollow part (37) is formed by the first connecting part (21), the second connecting part (22), the first part (2), the second part (3) and the mounting part (30).

9. The thermal management device according to claim 1 or 2, characterized in that, The first connecting part (21), the second connecting part (22), the mounting part (30) and the main body part (1) form an integral component.

10. The thermal management device according to claim 4, characterized in that, The first connecting channel (26) and / or the second connecting channel (27) respectively include a groove disposed on the corresponding connecting part and a cover plate for covering the groove.

11. The thermal management device according to claim 10, characterized in that, The groove is open in a direction away from the mounting surface (35).

12. The thermal management device according to claim 1, characterized in that, The thermal management device further includes a multi-way valve (100), the valve chamber (10) of which is at least partially formed on the main body (1) and in fluid communication with the second connection channel (27).

13. The thermal management device according to claim 12, characterized in that, The main body (1) has a first portion (2) extending along a first direction (D1) and a second portion (3) extending along a second direction (D2) transverse to the first direction (D1); The first connecting part (21) is connected to the first part (2) and the mounting part (30) respectively, so that the first connecting channel (26) fluidly communicates the first part (2) and the first internal channel (33); the second connecting part (22) is connected to the first part (2) and the mounting part (30) respectively, so that the second connecting channel (27) fluidly communicates the first part (2) and the second internal channel (34); The valve chamber (10) of the multi-way valve (100) is located in the second part (3).

14. The thermal management device according to claim 13, characterized in that, The first portion (2) has a first edge (41) and a second edge (42) transverse to the first edge (41); the first edge (41) and the second edge (42) define a corner (43) of the first portion (2); The first connecting portion (21) extends from the first edge (41) in a direction away from the first part (2), and the second connecting portion (22) extends from the second edge (42) in a direction away from the first part (2).

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