Heat exchange unit and vehicle thermal management system

Abstract

The present invention discloses a heat exchange unit and a vehicle thermal management system. The vehicle thermal management system includes a heat exchange unit, the heat exchange unit including a first heat exchange section (10), a bridge (20), a second heat exchange section (30), and a connecting member (40), the first heat exchange section (10), the bridge (20), and the second heat exchange section (30) are fixed by welding, the heat exchange unit includes six connection ports, the connecting member (40) has at least three connection ports, namely a fourth connection port (54), a fifth connection port (55), and a sixth connection port (56), the bridge (20) includes two holes and / or grooves for communication facing the first heat exchange section (10), the bridge (20) includes at least two holes and / or grooves that communicate with the second heat exchange section (30), and the openings of the holes and / or grooves in the bridge (20) that can communicate with the second heat exchange section (30) face the second heat exchange section (30). The bridge (20) allows fluid communication between the two heat exchange sections (10, 30) to be relatively easily realized, and the arrangement of multiple connection ports on the connecting member (40) makes system connection simple and easy. Different system needs can be met by changing the structure of the bridge (20) and the structure of the connecting member (40), making it suitable for a variety of systems, simplifying the system's piping and reducing the number of piping arrangements between the connection ports.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application filed with the China National Intellectual Property Administration on July 25, 2020, with the application number 202010726730.5 and the invention title "Heat Exchange Unit and Vehicle Thermal Management System", and all its contents are incorporated herein by reference.

[0002] The present invention relates to the field of fluid control, and more specifically, to a heat exchange unit and a vehicle thermal management system.

Background Art

[0003] The thermal management system includes two or more heat exchangers, such as a plate evaporator. These heat exchangers and components are generally connected by pipelines and fixedly arranged in the thermal management system. Also, due to the large number of components in the thermal management system, the pipeline connection of the thermal management system is relatively complex.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention is to provide a heat exchange unit with relatively simple connection when connecting the thermal management system.

Means for Solving the Problems

[0005] The present invention is a heat exchange unit including a first heat exchange part, a bridge, a second heat exchange part, and a connecting member. At least a part of the bridge is located between the first heat exchange part and the second heat exchange part (30). The first heat exchange part, the bridge, and the second heat exchange part are fixed by welding. At least a part of the second heat exchange part is located between the bridge and the connecting member. The first heat exchange part includes a heat exchange core and at least two fluid flow paths that do not communicate with each other. The heat exchange unit includes at least six connection ports, namely a first connection port, a second connection port, a third connection port, a fourth connection port, a fifth connection port, and a sixth connection port. The connection member is provided with the fourth connection port, the fifth connection port, and the sixth connection port. The second heat exchange part includes four pore channels, namely a first pore channel, a second pore channel, a third pore channel, and a fourth pore channel. The fourth connection port communicates with the first pore channel of the second heat exchange part. The fifth connection port communicates with the fourth pore channel of the second heat exchange part. The sixth connection port communicates with the fourth connection port via the second heat exchange part or via a flow path. The first heat exchange part includes two pore channels, namely a first pore channel and a second pore channel. Furthermore, the first pore channel of the first heat exchange part communicates with the first pore channel of the second heat exchange part via the bridge. The bridge includes two communication holes and / or grooves facing the first heat exchange part. The bridge includes at least two holes and / or grooves communicating with the second heat exchange part. The mouths of the holes and / or grooves in the bridge that can communicate with the second heat exchange part face the second heat exchange part.

[0006] The present invention also provides a vehicle thermal management system, which includes a refrigerant flow path and a coolant flow path. The vehicle thermal management system of the present invention includes a compressor, a condenser, and at least one evaporator. The coolant flow path flows through the flow path parts communicating with the first connection port and the second connection port at the first connection port part, the second connection port part, and the first heat exchange part. The condenser is connected to the third connection port part by a pipeline, or is connected to the third connection port part by a pipeline and a liquid reservoir. The inlet of the compressor communicates with the fourth connection port. The inlet of the evaporator communicates with the fifth connection port, or the vehicle thermal management system further includes a throttle element between the inlet of the evaporator and the fifth connection port. The outlet of the evaporator communicates with the sixth connection port.

[0007] The flow paths described in this specification include the flow paths provided in a single member and the flow paths formed by connecting two or more components. For example, the fact that the sixth connection port communicates with the fourth connection port via a flow path includes the flow path of the connection member itself, the flow path formed by the space where the groove facing the second heat exchange part in the connection member is located after fixing the connection member and the second heat exchange part, the flow path formed by the space recessed inside the second heat exchange part after fixing the connection member and the second heat exchange part, the flow path formed by connecting the connection member, the second heat exchange part and other components, and the like. The communication holes and / or grooves facing the first heat exchange part include various situations such as communication holes, communication grooves, the combination of holes and grooves, the combination of holes and holes, the combination of grooves and grooves, and more combinations. And the holes and / or grooves communicating with the second heat exchange part are the same, and may be the communication between the hole and the second heat exchange part, the communication between the groove and the second heat exchange part, or the communication between the hole and the groove and the second heat exchange part. Communication includes direct communication and indirect communication. The bridge includes two communication holes or grooves facing or close to the first heat exchange part, and at least two holes and / or grooves capable of communicating with the second heat exchange part. And the communication hole or groove facing or close to the first heat exchange part does not exclude communicating with the second heat exchange part. If it is in the form of a through hole, at the same time, it faces the first heat exchange part and the second heat exchange part and can communicate with the second heat exchange part. Regarding how the two communicate with each other through a pipeline or any member, this specification does not describe it as sealed, but refers to the fact that the two communicate with each other. There are various possibilities that there are further other components such as a throttle element, a separator, a control valve, a check valve, and a heat exchanger between the two.

Advantages of the Invention

[0008] The bridge can conveniently realize the fluid communication between two heat exchange parts. By arranging a plurality of connection ports on the connection member, the connection of the vehicle heat management system is simple and easy. For different system needs, it can be realized by changing the configuration of the bridge and the configuration of the connection member. It is suitable for various systems, simplifies the pipeline of the system, and reduces the arrangement of the pipeline between the connection ports.

Brief Description of the Drawings

[0009]

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Mode for Carrying Out the Invention

[0010] Hereinafter, an explanation will be given based on specific embodiments. Referring to FIGS. 1 to 9, FIGS. 1 and 2 are perspective views of a heat exchange unit which is a first embodiment of the present invention, FIG. 3 is a front view of the heat exchange unit, FIG. 4 is a sectional view of the heat exchange unit of FIG. 3 taken along the line A - A, FIG. 5 is an exploded view of the heat exchange unit, FIG. 6 is a perspective view of a bridge in the heat exchange unit, FIG. 7 is a front view of the bridge of FIG. 6 and sectional views taken along the B - B direction and the C - C direction, and FIGS. 8 and 9 are perspective views of a connecting member in the heat exchange unit. As shown in the drawings, the heat exchange unit includes a first heat exchange section 10, a throttle element 110, a bridge 20, a second heat exchange section 30, and a connecting member 40. The bridge 20 is located between the first heat exchange section 10 and the second heat exchange section 30, and the connecting member 40 is located on the other side of the second heat exchange section 30. That is, the bridge 20 and the connecting member 40 are respectively arranged on both sides of the second heat exchange section. The first heat exchange section 10, the bridge 20, and the second heat exchange section 30 are fixed by welding, or the first heat exchange section 10, the bridge 20, the second heat exchange section 30, and the connecting member are fixed by welding.

[0011] The first heat exchange section 10 includes a heat exchange core. The first heat exchange section 10 includes two flow paths for a fluid to flow through and perform heat exchange. There is a gap between the two fluid flow paths. The first heat exchange section 10 includes an interlayer flow path separated by laminating sheets. And in this first heat exchange section 10, at least two fluids flow. These two fluids can perform heat exchange in the first heat exchange section. If one fluid is a refrigerant, the other can be a coolant for cooling a heat generating element such as a battery, or there can be three fluids. If one fluid is a refrigerant, the other two can be coolants. The two coolants are selected to perform heat exchange with the refrigerant by control. After being cooled by heat exchange, the coolant cools the components that require cooling. Hereinafter, the case of two fluids will be described as an example.

[0012] The heat exchange unit includes a first connection port 51, a second connection port 52, a third connection port 53, a fourth connection port 54, a fifth connection port 55, a sixth connection port 56, and a seventh connection port 57. In this embodiment, the first heat exchange section is provided with the first connection port 51 and the second connection port 52, the bridge 20 is provided with the third connection port 53, and the connection member 40 is provided with the fourth connection port 54, the fifth connection port 55, the sixth connection port 56, and the seventh connection port 57. The throttle element 110 and the first heat exchange section 10 are arranged to be fixed or position-limited. The first heat exchange section 10 includes, for example, four channels such as a first channel 103 and a second channel 104 (not entirely shown). The first heat exchange section arranges a pipe having a communication port 105 in the channel 104, and the communication port 105 communicates with the throttle element 110. The first heat exchange section 10 includes a first connection port portion 101 and a second connection port portion 102. And the first connection port portion 101 is provided with the first connection port 51 for communicating with the coolant, the second connection port portion 102 is provided with the second connection port 52 for communicating with the coolant. The first connection port 51 and the second connection port 52 communicate with each other through the flow path of the heat exchange core. The first connection port portion 101 and the second connection port portion 102 may be part of the side plate of the first heat exchange section, or may be individually processed and welded to be fixed to the side plate and / or the heat exchange core of the first heat exchange section. The first connection port portion and the second connection port portion may further be fixed to the first heat exchange section in the form of a pipe connection member.

[0013] The bridge 20 is provided with a first engaging portion 200 and a second engaging portion 200'. The first heat exchange portion 10 is provided with an engaging portion 100 that engages corresponding to the first engaging portion 200 of the bridge. The second heat exchange portion 30 is provided with an engaging portion 300 that engages corresponding to the second engaging portion 200' of the bridge. The engaging portion 100 of the first heat exchange portion 10, the engaging portion 300 of the second heat exchange portion 30, and the two engaging portions of the bridge all include flat portions. The communication holes or grooves, or the mouths of the conduction portions provided on the side of the first engaging portion 200 of the bridge are all located inside the first engaging portion. The periphery of each communication mouth is surrounded by the first engaging portion. The first heat exchange portion is provided with corresponding communication mouths at positions corresponding to the positions of the communication mouths of the bridge. Each communication mouth of the first heat exchange portion is located inside its engaging portion, and each communication mouth is surrounded by the engaging portion. In this way, after the engaging portion 100 of the first heat exchange portion 10 and the first engaging portion 200 of the bridge are welded and sealed, the communication mouths of the bridge can communicate with the corresponding communication mouths of the first heat exchange portion. In other words, the periphery of each communication mouth includes a part of the engaging portion. And both of them form a substantially sealed configuration in the engaging portions arranged opposite to each other. The engaging portion 300 of the second heat exchange portion 30 corresponds to the position of the second engaging portion 200' of the bridge. After the two are welded and sealed, the communication mouths on this side of the bridge all communicate with the communication mouths of the second heat exchange portion. Specifically, the side of the second heat exchange portion 30 facing the bridge 20 is provided with the mouths of three pore passages, namely, the third pore passage 301, the fourth pore passage 302, and the first pore passage 303. The side of the bridge 20 facing the second heat exchange portion 30, that is, the second engaging portion, is provided with the mouth of the flow guiding hole 202, the mouth of the first groove 203, and the mouth of the hole 2041 of the flow guiding portion 204. The mouth of the third pore passage 301 of the second heat exchange portion corresponds to the position of the mouth of the flow guiding hole 202. The mouth of the fourth pore passage 302 corresponds to the position of the mouth of the first groove 203. The mouth of the first pore passage 303 corresponds to the position of the mouth of the hole 2041 of the flow guiding portion 204. The mouth of the hole 2041 is arranged to extend substantially vertically. The mouth of the first groove 203 is arranged to extend substantially vertically.

[0014] The orientation terms such as up and down in this specification are not restrictive and correspond to the height direction here. In this specification, the holes include, but are not limited to, through holes and blind holes. The shape of the holes may be circular or non-circular. The grooves generally target situations where they do not penetrate completely, including situations where they mostly do not penetrate but locally penetrate.

[0015] The bridge 20 further includes a third connection port 211. The third connection port 211 includes a third connection port 53 and protrudes externally. It may be integrally formed with the main body of the bridge or may be individually processed, welded, and fixed to the main body of the bridge. Also, a through hole 206 is provided in the bridge 20. The first groove 203 is similar to a blind hole and extends vertically. A through hole 206 is provided on the side of the first groove 203 that is relatively close to the third connection port. A second groove 205 is provided on the side of the bridge where the first engaging portion is located. The second groove 205 is similar to a blind hole and extends vertically. The through hole 206 is located on the side relatively far from the third connection port of the second groove 205. The first groove 203 and the second groove 205 communicate with each other through the through hole 206. In other words, as shown in FIG. 7, the extending end of the first groove 203 is the through hole 206 or a part of the through hole 206, and one extending end of the second groove 205 is the through hole 206 or a part of the through hole 206. The flow guiding hole 202 is similar to a blind hole. The mouth of the flow guiding hole 202 is located on the side of the second engaging portion. The flow guiding hole 202 communicates with the third connection port 53. The depth of the flow guiding hole is equal to or more than 1 / 2 of the thickness of the bridge, or close to 1 / 2 of the thickness of the bridge. For example, it is equal to or more than 1 / 3 of the thickness of the bridge and less than 2 / 3 of the thickness of the bridge. The flow guiding portion 204 includes a hole 2041 and a groove 2042. The hole 2041 is similar to a through hole, the groove 2042 is similar to a blind hole, and the mouth of the groove 2042 is provided on the side where the first engaging portion is located. In this specification, the side of the bridge facing the first heat exchange part is defined as the front, and the side of the bridge facing the second heat exchange part is defined as the back. In this embodiment, the side where the first groove 203 of the bridge is provided is the back, the side where the second groove 205 is provided is the front. At least a part of the projection of the first groove 203 onto the front is located in the groove 2042 of the conduction part, and at least a part of the projection of the flow guiding hole 202 onto the front is located in the second groove 205. That is, the flow guiding hole 202 and the second groove 205 are at least partially back-to-back and not directly communicating, and the first groove 203 and the groove 2042 are at least partially back-to-back and not directly communicating.

[0016] The connection member 40 includes a main body part 4010 and an extending part 4011. And, the connection member 40 is provided with a fourth connection port 54, a fifth connection port 55, a sixth connection port 56, a seventh connection port 57, and a fixing hole 409 for engagement fixing or position limiting. The side of the connection member 40 facing the second heat exchange part 30 is provided with a groove 405. The groove 405 has a configuration similar to a blind hole. At a location of the groove 405 relatively close to the fourth connection port 54, the seventh connection port 57 is provided. At a position approximately in the middle of the groove 405, the fifth connection port 55 is provided. The fifth connection port 55 communicates with the groove 405, and the seventh connection port 57 communicates with the groove 405. The connection member further includes a fixing member 450 for fixing or position control. The fixing member 450 is arranged to be fixed or position-limited in the fixing hole 409.

[0017] The heat exchange unit facilitates the mounting connection of the heat management system, reduces the connected pipelines, and reduces the volume of the system. Taking the application of this heat exchange unit to a vehicle heat management system as an example, when actually used, these parts are fixed. For the purpose of clear explanation, this exploded view shows the flow mode of the refrigerant for the purpose of explanation. In a specific vehicle heat management system, the vehicle heat management system includes a refrigerant system and a battery heat management system. Then, referring to FIG. 5 and other drawings, the battery thermal management system includes a first connection port 101 and a second connection port 102 of the heat exchange unit, and a flow path portion that communicates with the first connection port and the second connection port in the first heat exchange portion. The heat of the battery can be transferred to the coolant, flows through the flow path of the said portion of the first heat exchange portion via the first connection port 51 or the second connection port 52, exchanges heat with the refrigerant in another flow path in the first heat exchange portion, and after the coolant is cooled, returns to cool the battery. The third connection port 53, the fourth connection port 54, the fifth connection port 55, the sixth connection port 56, and the seventh connection port 57 are each in communication with the refrigerant system. For example, the refrigerant cooled by the condenser enters the heat exchange unit through the third connection port 53, or the refrigerant passing through the liquid storage tank enters the heat exchange unit through the third connection port 53. Thus, the high-temperature and high-pressure refrigerant reaches the third channel 301 of the second heat exchange part through the flow guide hole 202, and after heat exchange with the refrigerant in another flow path in the second heat exchange part 30, it reaches the fourth channel 302. The refrigerant reaching the fourth channel 302 is divided into the following two parts. One part flows out through the flow path formed by the space where the groove 405 is located, which is formed by the engagement of the connection member 40 and the second heat exchange part, the fifth connection port 55, and the seventh connection port 57. For example, it passes through the front evaporator through the fifth connection port 55 and through the rear evaporator through the seventh connection port 57, or passes through the rear evaporator through the fifth connection port 55 and through the front evaporator through the seventh connection port 57. A throttle element may be arranged in front of the front evaporator or the rear evaporator. The refrigerant of the other part enters the throttle element 110 through the flow path formed by the space where the first groove 203 is located due to the engagement of the bridge and the engaging part of the second heat exchange part, the through hole 206, the flow path formed by the space where the second groove 205 is located due to the engagement of the bridge and the engaging part of the first heat exchange part, and the communication port communicating with the throttle element. After being throttled by the throttle element 110, it enters the channel of the first heat exchange part 10, exchanges heat with the coolant in the coolant flow path in the refrigerant flow path of the first heat exchange part, reaches the first channel 103, and reaches the first channel 303 of the second heat exchange part through the flow path formed by the flow guide part 204 where the bridge, the first heat exchange part, and the second heat exchange part are engaged, and flows out through the fourth connection port communicating with the first channel 303. For example, it returns to the compressor. Also, the sixth connection port 56 communicates the refrigerant returned from the front evaporator and / or the rear evaporator. The low-temperature refrigerant of this part flows from the second channel 304 of the second heat exchange part to the first channel 303, exchanges heat with the high-temperature refrigerant flowing from the third channel 301 to the fourth channel 302, and after the two parts of the refrigerant merge at the first channel 303, it returns to the compressor through the fourth connection port. Thus, a part of the low-temperature refrigerant cools the high-temperature refrigerant, reduces the condensation temperature of the refrigerant, and does not increase the temperature of the refrigerant returning to the compressor. The flow direction in this specification is for illustration only, without any limitation or requirement for airtightness. Other components can be added, for example, other control valve members can be added in front of the compressor. The bridge 20 is further provided with a sensing element 250, for example, a second mounting portion 207 for mounting a temperature sensing element. The temperature sensing sensor head 2501 is located in the flow path where the flow guiding portion 204 is located through the mounting portion, so that the temperature of the refrigerant after passing through the first heat exchange portion, in other words, the outlet temperature of the evaporator, can be obtained.

[0018] This heat exchange unit realizes the heat exchange between the high-temperature refrigerant and a part of the low-temperature refrigerant, reduces the temperature of the high-temperature refrigerant, and does not excessively increase the temperature of the refrigerant returning to the compressor, thereby improving the efficiency, reducing the pipeline arrangement between the connection ports, and making the system connection simple and easy. Also, in order to further reduce the weight, as shown in FIGS. 10 and 11 for the bridge, the bridge is an improvement over the above embodiments. A part is removed from the middle part of the bridge to form a relief hole 2032. The relief hole penetrates from the side close to the first heat exchange portion of the bridge to the side close to the second heat exchange portion. The shape of the hole 2032 may be non-standard and can be removed according to the needs of the engagement welding. The relief hole may generally be a through hole. The distance from the hole 2032 to the second groove 205 for communication opposite to the first heat exchange portion of the bridge is 1.5 mm or more. The distance from the relief hole 2032 to the conduction portion 204 for communication opposite to the first heat exchange portion of the bridge is 1.5 mm or more. The distance from the hole 2032 to the hole 202' for communication opposite to the second heat exchange portion of the bridge is 1.5 mm or more. The hole 202' is a flow guiding hole. The distance from the hole 2032 to the first groove 203 for communication opposite to the second heat exchange portion of the bridge is 1.5 mm or more. The distance from the hole 2032 to the hole 2041 for communication opposite to the second heat exchange portion of the bridge is 1.5 mm or more. In other words, this distance is the distance of the engagement portion for the bridge to engage and weld with the first heat exchange portion and the second heat exchange portion respectively. Also, a part is removed from one side to form a concave portion, that is, a notch 2031. In this way, the area of the first engaging portion of the bridge that engages with the first heat exchange portion becomes smaller. Similarly, the area of the second engaging portion that engages with the second heat exchange portion also becomes smaller. As a result, the area of the engagement welding can be reduced, the welding quality can be improved, and at the same time, the weight can be reduced. At the joint of the hole 2041 and the groove 2042, the bridge has a first wall portion 215 and a second wall portion 216. On the surface of the first wall portion 215 facing the flow guiding portion, a first wall surface 2045 that smoothly transitions is formed. On the surface of the second wall portion 216 facing the flow guiding portion, a second wall surface 2046 that smoothly transitions is formed. In this way, when the bridge, the first heat exchange portion, and the second heat exchange portion are engaged and the refrigerant corners through the flow path formed by the flow guiding portion 204', due to the arrangement of the smooth transition portion, the flow resistance of the refrigerant can be reduced. The non-circular flow guiding hole 202' extends in a substantially horizontal direction, and in this way, it becomes more convenient when assisting the flow.

[0019] Hereinafter, a heat exchange unit which is the second embodiment will be introduced. Referring to FIGS. 12 to 17, FIGS. 12 and 13 are perspective views of the heat exchange unit, FIG. 14 is an exploded view of the heat exchange unit, FIG. 15 is a perspective view of the bridge in the heat exchange unit viewed from two directions, FIG. 16 is a front view of the bridge in FIG. 15, and FIG. 17 is an exploded view of the connecting member in the heat exchange unit in FIG. 12. This heat exchange unit includes a first heat exchange portion 10, a bridge 20, a second heat exchange portion 30, and a connecting member. The heat exchange unit is provided with a first connection port 51, a second connection port 52, a third connection port 53, a fourth connection port 54, a fifth connection port 55, a sixth connection port 56, a seventh connection port 57, and an eighth connection port 58. A third connection port portion 211 is provided on the bridge 20. The throttle element 110 and the first heat exchange portion 10 are arranged to be fixed or position-limited. The first heat exchange portion 10 includes, for example, four hole paths such as a first hole path 103 and a second hole path 104 (not all shown). The first heat exchange portion 10 includes a first connection port portion 101 and a second connection port portion 102. The first connection port portion 101 is provided with a first connection port 51 for communicating with the coolant, the second connection port portion 102 is provided with a second connection port 52 for communicating with the coolant, the first connection port 51 and the second connection port 52 are communicated with each other by the flow path of the heat exchange core, and the first connection port portion 101 and the second connection port portion 102 may be a part of the side plate of the first heat exchange portion, or may be individually processed and welded to be fixed to the side plate of the first heat exchange portion and / or the heat exchange core.

[0020] The bridge 20 is provided with a first engaging portion 200, the first heat exchange portion 10 is provided with an engaging portion 100 that engages with the first engaging portion 200 of the bridge, the first engaging portion 200 engages with the engaging portion of the first heat exchange portion facing each other, and the engaging portion 100 of the first heat exchange portion 10 and the first engaging portion 200 of the bridge both include flat surfaces. And the hole or groove for communication provided on the side of the first engaging portion 200 of the bridge, or the mouth portion of the conduction portion is located inside the first engaging portion, and the periphery of each mouth portion for communication is surrounded by the first engaging portion. The first heat exchange portion is provided with corresponding communication ports at positions corresponding to the positions of the communication ports of the bridge. Each communication port is located inside its engaging portion, and each communication port is surrounded by the engaging portion. In other words, both of them include a substantially sealed configuration with engaging portions arranged opposite to each other. And thus, after the engaging portion 100 of the first heat exchange portion 10 and the first engaging portion 200 of the bridge are welded and sealed, the communication ports of the bridge communicate with the corresponding communication ports of the first heat exchange portion. Specifically, the first heat exchange portion 10 is provided with a mouth portion of a first hole path 103 and a communication port 105 communicating with a throttle element on the side facing the bridge 20. The first heat exchange portion 10 is provided with a mouth portion of a first hole path 103 and a communication port 105 communicating with a throttle element on the side facing the bridge 20. The bridge 20 is provided with corresponding holes 223 and 224 on the side facing the first heat exchange portion 10. The mouth portion of the hole 223 corresponds to the position of the mouth portion of the first hole path 103 of the first heat exchange portion, and the mouth portion of the hole 224 corresponds to the communication port 105 communicating with the throttle element. The holes 223 and 224 are through holes.

[0021] The bridge 20 is provided with a second engaging portion 200' facing the second heat exchange portion. The second heat exchange portion 30 is provided with an engaging portion 300. The engaging portion 300 of the second heat exchange portion 30 and the second engaging portion 200' of the bridge both include flat portions. And the holes or grooves for communication provided on the side of the bridge where the second engaging portion is located, or the mouths of the conduction portions are located inside the second engaging portion. The periphery of each mouth for communication is surrounded by the second engaging portion. The second heat exchange portion is provided with corresponding mouths for communication at positions corresponding to the positions of the mouths for communication of the bridge. Each mouth for communication is located inside its engaging portion, and the periphery of each mouth for communication is surrounded by the engaging portion. In other words, the periphery of each mouth for communication includes a part of the engaging portion, and both form a substantially sealed configuration in the engaging portions arranged opposite to each other. The engaging portion 300 of the second heat exchange portion 30 corresponds to the position of the second engaging portion 200' of the bridge. After the two are welded and sealed, the mouths for communication located on this side of the bridge can communicate with the mouths for communication of the second heat exchange portion. Specifically, the second heat exchange portion 30 is provided with the mouths of three orifices, namely, a third orifice 301, a fourth orifice 302, and a first orifice 303, on the side facing the bridge 20. The bridge 20 is provided with the mouth of a flow guiding hole 202, the mouth of a hole 223, and the mouth of a hole 224 on the side facing the second heat exchange portion 30, that is, on the second engaging portion. The mouth of the third orifice 301 of the second heat exchange portion corresponds to the position of the mouth of the flow guiding hole 202. The mouth of the fourth orifice 302 corresponds to the position of the mouth of the hole 224. The mouth of the first orifice 303 corresponds to the position of the mouth of the hole 223. The bridge 20 further includes a third connection port 211. And the third connection port 211 is provided with a third connection port 53 and includes a configuration protruding to the outside. It may be a configuration integrally formed with the main body of the bridge, or a configuration processed individually and welded and fixed to the main body of the bridge. Four relief holes 2032 are provided in the bridge 20. The holes 2032 may be non-circular through holes or circular holes. The flow guiding hole 202 is similar to a blind hole. The mouth of the flow guiding hole 202 is provided on the side where the second engaging portion is located. The flow guiding hole 202 communicates with the third connection port 53. The bridge includes a convex portion 217 arranged to protrude substantially horizontally along the main body portion, and a second convex portion 218 arranged to protrude outward from a corner of the main body portion. The first side surface 2171 of the convex portion 217 is lower than the second engaging portion 200' of the bridge, and the second side surface 2172 of the convex portion 217 is lower than the first engaging portion 200 of the bridge. Similarly, both side surfaces of the second convex portion are correspondingly lower than the engaging portions on the corresponding one side of both sides of the bridge. In other words, the thickness of the convex portion 217 is smaller than the thickness of the main body portion of the bridge, and the thickness of the second convex portion 218 is smaller than the thickness of the main body portion of the bridge. By arranging the convex portion and the second convex portion, the main body portion of the bridge can be made smaller, at least a part of the fixing hole 221 can be arranged in the convex portion 217 and / or the second convex portion 218, and at least a part of the third connection port portion 211 can be positioned in the second convex portion, thereby making the main body portion smaller.

[0022] The connection member includes a connection block 411, a connection plate 412, a first pipe connection portion 4131, a second pipe connection portion 4132, and a third pipe connection portion 4133. The connection block 411, the connection plate 412, the first pipe connection portion 4131, the second pipe connection portion 4132, and the third pipe connection portion 4133 are fixed by welding, and the thickness of the connection block 411 is larger than the thickness of the connection plate 412. A fourth connection port 54 is provided in the first pipe connection portion 4131, a seventh connection port 57 and an eighth connection port 58 are provided in the second pipe connection portion 4132, and a fifth connection port 55 and a sixth connection port 56 are provided in the third pipe connection portion 4133. Fixing holes 409 for engagement fixing or position limiting with the fixing member 450 are further provided in the three pipe connection portions of the connection member. The connection plate 412 is located between the connection block 411 and the three pipe connection portions. The connection block is relatively close to the second heat exchange portion. In other words, the connection block is fixed by welding close to the second heat exchange portion. The connection block 411 is provided with three through holes, namely, a through hole 4111, a through hole 4112, and a through hole 4113. The through hole 4111 and the through hole 4112 are non-circular, and may be arranged obliquely or in an arc shape, without limiting the shape. The positions of both ends thereof are preferably such that corresponding flow paths are conducted. The through hole 4113 is circular. One side of the through hole 4111, the through hole 4112, and the through hole 4113 are located on one side of the connection block that is relatively close in the length direction. The connection plate is provided with five through holes, namely, 4121, 4122, 4123, 4124, and 4125. The positions of the through hole 4121 and the through hole 4125 correspond to the through hole 4111, that is, both the through hole 4121 and the through hole 4125 can communicate with the through hole 4111. The positions of the through hole 4122 and the through hole 4124 respectively correspond to the through hole 4112, that is, both the through hole 4122 and the through hole 4124 can communicate with the through hole 4112. The position of the through hole 4123 corresponds to the through hole 4113. The position of the fourth connection port 54 corresponds to the through hole 4121, and the fourth connection port can communicate with the through hole 4121, that is, communicate with the through hole 4111 of the connection block. The position of the eighth connection port 58 corresponds to the through hole 4125, and the eighth connection port can communicate with the through hole 4125, that is, communicate with the through hole 4111 of the connection block. The position of the seventh connection port 57 corresponds to the through hole 4124, and the seventh connection port can communicate with the through hole 4124, that is, communicate with the through hole 4112 of the connection block. The position of the fifth connection port 55 corresponds to the through hole 4122, and the fifth connection port can communicate with the through hole 4122, that is, communicate with the through hole 4112 of the connection block. The position of the sixth connection port 56 corresponds to the through hole 4123, and the sixth connection port can communicate with the through hole 4123, that is, communicate with the through hole 4113 of the connection block. In this embodiment, the connection member is formed by processing from a profiled material or a pressed part and assembled, and the mechanical processing steps can be reduced.

[0023] The flow paths in this specification include the flow paths provided in a single member and the flow paths formed by combining two or more parts. For example, the eighth connection port communicating with the fourth connection port 54 through a flow path includes communicating through the flow path of the connection member itself. After fixing the connection member and the second heat exchange unit, a flow path formed toward the space where the groove facing the second heat exchange unit in the connection member is located, or a flow path formed from the space recessed inside the second heat exchange unit after fixing the connection member and the second heat exchange unit. Furthermore, it includes communication through a flow path formed by combining the connection member, the second heat exchange unit, and other components.

[0024] The heat exchange unit facilitates the mounting connection of the heat management system, reduces the connected pipelines and connection ports, and reduces the volume of the system. Taking the application of this heat exchange unit to a vehicle heat management system as an example, here, when actually used, these components are fixed. For the purpose of clear explanation, this exploded view shows the refrigerant flow mode for easy explanation. Refer to FIG. 14 and other drawings. Taking the vehicle heat management system as an example, the vehicle heat management system includes a refrigerant system and a battery heat management system. The battery heat management system includes the first connection port part 101 and the second connection port part 102 of the heat exchange unit, and the flow path parts of the first heat exchange unit communicating with the first connection port and the second connection port. The heat of the battery can be transferred to the coolant, flow through the flow path of this part of the first heat exchange unit via the first connection port 51 or the second connection port 52, perform heat exchange with the refrigerant in another flow path in the first heat exchange unit, and after the coolant is cooled, return to cool the battery. The third connection port 53, the fourth connection port 54, the fifth connection port 55, the sixth connection port 56, the seventh connection port 57, and the eighth connection port 58 are each in communication with the refrigerant system. For example, the refrigerant cooled by the condenser enters the heat exchange unit through the third connection port 53, or the refrigerant passing through the liquid storage enters the heat exchange unit through the third connection port 53. Thus, the high-temperature and high-pressure refrigerant reaches the third pore passage 301 of the second heat exchange part through the flow guiding hole 202, exchanges heat with the refrigerant in another flow path in the second heat exchange part 30, then reaches the fourth pore passage 302. The refrigerant reaching the fourth pore passage 302 is divided into the following two parts. One part reaches the seventh connection port 57 through the flow path formed by the connection member and the second heat exchange part, for example, the through hole 4112 of the connection block 411 and the through hole 4124 of the connection plate, reaches the fifth connection port 55 through the through hole 4112 of the connection block 411 of the connection member and the through hole 4122 of the connection plate, and flows out through the fifth connection port 55 and the seventh connection port 57. For example, it leads to the front evaporator through the fifth connection port 55 and to the rear evaporator through the seventh connection port 57, or leads to the rear evaporator through the fifth connection port 55 and to the front evaporator through the seventh connection port 57. A throttle element may be arranged in front of the front evaporator or the rear evaporator. The refrigerant of the other part enters the throttle element 110 through the through hole 224 of the bridge and the pipeline communication port 105 communicating with the throttle element 110. There is no communication between the bridge and the second pore passage 104. After being throttled by the throttle element 110, it enters the second pore passage 104 of the first heat exchange part 10, exchanges heat with the cooling liquid in the cooling liquid flow path in the refrigerant flow path of the first heat exchange part, reaches the first pore passage 103, reaches the first pore passage 303 of the second heat exchange part through the through hole 223 of the bridge, and flows out through the through hole 411 of the connection block communicating with the first pore passage 303, the through hole 4121 of the connection plate, and the fourth connection port 54. For example, it returns to the compressor. Also, the sixth connection port 56 communicates the refrigerant returned from the front evaporator and / or the rear evaporator. The low-temperature refrigerant of this part reaches the second pore passage 304 of the second heat exchange part through the through hole 4123 of the connection plate and the through hole 4113 of the connection block, flows to the first pore passage 303, and exchanges heat with the high-temperature refrigerant flowing from the third pore passage 301 to the fourth pore passage 302. After the two parts of the refrigerant merge in the first pore passage 303, it returns to the compressor through the fourth connection port. The eighth connection port 58 communicates the refrigerant returned from the rear evaporator and / or the front evaporator. The low-temperature refrigerant of this part isIt merges with other refrigerants through the through-hole 4111 of the connection block and returns to the compressor through the fourth connection port. The flow direction described in this specification is for illustrative purposes only, not a limitation or a requirement for sealing. Other components may be added, for example, other control valve members may be added in front of the compressor. The bridge 20 is provided with a sensing element 250, for example, a second mounting portion 207 for mounting a temperature sensing element. The hole of the second mounting portion 207 can communicate with the through-hole 223. The temperature sensing sensor head 2501 is located in the flow path where the through-hole 223 is located through the mounting portion. Thus, the temperature of the refrigerant after passing through the first heat exchange portion, in other words, the outlet temperature of the evaporator, can be obtained.

[0025] Hereinafter, a heat exchange unit which is the third embodiment will be introduced. Referring to FIGS. 18 to 24, FIGS. 18 and 19 are perspective views of the heat exchange unit, FIG. 20 is a view of the bridge of the embodiment, FIG. 21 is an exploded view of the heat exchange unit, FIG. 22 is a perspective view of the connection member in the heat exchange unit, and FIGS. 23 and 24 are front and reverse views of the connection block in the connection member of FIG. 22.

[0026] The heat exchange unit includes a first heat exchange portion 10, a bridge 20, a second heat exchange portion 30, and a connection member. The heat exchange unit is provided with a first connection port 51, a second connection port 52, a third connection port 53, a fourth connection port 54, a fifth connection port 55, a sixth connection port 56, a seventh connection port 57, and an eighth connection port 58. The throttle element 110 and the first heat exchange portion 10 are arranged to be fixed or position-limited. The first heat exchange portion 10 includes four hole paths such as a first hole path 103 and a second hole path 104 (the other two are not shown). The first heat exchange portion 10 includes a first connection port portion 101 and a second connection port portion 102. The first connection port 101 is provided with a first connection port 51 for communicating with the coolant, the second connection port 102 is provided with a second connection port 52 for communicating with the coolant, the first connection port 51 and the second connection port 52 communicate with each other through the flow path of the heat exchange core, and the first connection port 101 and the second connection port 102 may be part of the side plate of the first heat exchange part, or may be individually processed and welded to be fixed to the side plate of the first heat exchange part and / or the heat exchange core.

[0027] The bridge 20 is provided with a first engaging portion 200 and a second engaging portion 200'. The first engaging portion 200 engages with the engaging portion 100 of the first heat exchange portion 10 in opposition, the second engaging portion 200' engages with the engaging portion 300 of the second heat exchange portion 30 in opposition. The engaging portion 100 of the first heat exchange portion 10, the engaging portion 300 of the second heat exchange portion 30, and the two engaging portions of the bridge all include flat portions. The bridge 20 includes a through hole 223 and a through hole 222. The through hole 222 extends substantially in the lateral direction. The bridge 20 further includes a second mounting portion 207. The hole of the second mounting portion 207 communicates with the through hole 222. In other words, the mounting portion is provided on the side close to the through hole 222. The openings of the through hole 223 and the through hole 222 close to the first heat exchange portion side are located inside the first engaging portion and are surrounded by the first engaging portion. In other words, the periphery of the openings of the through hole 223 and the through hole 222 is provided with a flat portion for assisting in welding and sealing. On the other side, the openings of the through hole 223 and the through hole 222 are located inside the second engaging portion and are surrounded by the second engaging portion. In other words, the periphery of the openings of the through hole 223 and the through hole 222 is provided with a flat portion for assisting in welding and sealing. In this way, after the engaging portion 100 of the first heat exchange portion 10 and the first engaging portion 200 of the bridge are welded and sealed, the openings of the two through holes of the bridge communicate with the corresponding communication openings of the first heat exchange portion. Specifically, the through-hole 223 of the bridge communicates corresponding to the communication port 105, the communication port 105 communicates with the throttle element, the through-hole 222 communicates corresponding to the first hole path 103 of the first heat exchange part 10, the mouths of the two through-holes of the bridge communicate with the corresponding communication mouths of the second heat exchange part, the through-hole 223 of the bridge communicates corresponding to the fourth hole path 302 of the second heat exchange part, and the through-hole 222 communicates corresponding to the first hole path 303 of the second heat exchange part 30.

[0028] The bridge 20 further includes two hollow holes 2032. Here, the arrangement of the holes 2032 reduces the weight of the bridge, reduces the area of the flat parts of the two engaging parts of the bridge, reduces the engaging parts between the bridge and the first heat exchange part and the second heat exchange part, can relatively control the range of contact welding, and improves the corresponding welding quality. In this embodiment, the manufacturing of the bridge is simple. A profile with corresponding four through-holes is used and manufactured by material dropping, processing and mounting parts, and two engaging parts on both sides, etc. The processing steps are relatively reduced.

[0029] The connection member includes a connection block 421 and a connection port engaging member 423. And the connection block 421 and the connection port engaging member 423 may be fixed by welding, or may be sealed and connected by fixing members and sealing members. The connection member is provided with a third connection port 53, a fourth connection port 54, a fifth connection port 55, a sixth connection port 56, a seventh connection port 57, and an eighth connection port 58. The connection block includes a third connection port part 4213, a fourth connection port part 4214, a fifth connection port part 4215, and a sixth connection port part 4216. And these third connection port part 4213, fourth connection port part 4214, fifth connection port part 4215, sixth connection port part 4216 may be configured to be integrally formed with the plate body part of the connection block, or may be individually processed and fixed to the plate body part of the connection block by welding. The connection block is provided with a through hole 4217, a through hole 4218, and a fixing hole 429 for engagement fixing or position limitation. The side of the connection member facing the second heat exchange part 30 is provided with a groove 4211 and a groove 4212. The groove has a configuration similar to a blind hole. The connection block arranges a fourth connection port 54 and a through hole 4218 on both opposite sides of the groove 4211 respectively. The fourth connection port 54 and the through hole 4218 communicate with the groove 4211. The connection block arranges a fifth connection port 55 and a through hole 4217 in the groove 4212 respectively. The fifth connection port 55 and the through hole 4217 communicate with the groove 4212. The sixth connection port 56 communicates with the second hole path 304 of the second heat exchange part 30. The fifth connection port 55 communicates with the fourth hole path 302 of the second heat exchange part 30. The third connection port 53 communicates with the third hole path 301 of the second heat exchange part 30. The fourth connection port 54 communicates with the first hole path 303 of the second heat exchange part 30. The connection port engaging member 423 is provided with a seventh connection port 57 communicating corresponding to the through hole 4217 of the connection block and an eighth connection port 58 communicating corresponding to the through hole 4218 of the connection block.

[0030] During use, for showing the flow pattern of the refrigerant, it is illustrated in the exploded view of FIG. 21, which is only for explanation. When actually used, some parts are fixedly arranged. In a specific vehicle thermal management system, the vehicle thermal management system includes a refrigerant system and a battery thermal management system. Referring to FIG. 21 and other drawings, the battery thermal management system includes a first connection port part 101, a second connection port part 102 of the heat exchange unit, and a flow path part communicating with the first connection port and the second connection port in the first heat exchange part. And the heat of the battery can be transmitted to the coolant, flow through the flow path of the corresponding part of the first heat exchange part through the first connection port 51 or the second connection port 52, perform heat exchange with the refrigerant in another flow path in the first heat exchange part. After the coolant is cooled, it returns to cool the battery. The third connection port 53, the fourth connection port 54, the fifth connection port 55, the sixth connection port 56, the seventh connection port 57, and the eighth connection port 58 are each in communication with the refrigerant system. For example, the refrigerant cooled by the condenser enters the heat exchange unit through the third connection port 53, or the refrigerant that has passed through the liquid storage enters the heat exchange unit through the third connection port 53. In this way, the high-temperature and high-pressure refrigerant connection member reaches the third channel 301 of the second heat exchange part 30, exchanges heat with the refrigerant in another flow path in the second heat exchange part 30, and then reaches the fourth channel 302. The refrigerant that reaches the fourth channel 302 is divided into the following two parts. One part flows out through the flow path formed from the space where the groove 4212 is located, which is formed by the engagement of the connection member and the second heat exchange part, the fifth connection port 55, and the seventh connection port 57. For example, it passes through the front evaporator through the fifth connection port 55 and through the rear evaporator through the seventh connection port 57, or passes through the rear evaporator through the fifth connection port 55 and through the front evaporator through the seventh connection port 57. A throttle element may be arranged in front of the front evaporator or the rear evaporator. The refrigerant of the other part enters the throttle element 110 through the hole 223 in the bridge that communicates with the fourth channel 302 of the second heat exchange part and the communication port 105 that communicates with the throttle element. After being throttled by the throttle element 110, it enters the second channel 104 of the first heat exchange part 10, exchanges heat with the coolant in the coolant flow path in the refrigerant flow path of the first heat exchange part, reaches the first channel 103, and reaches the first channel 303 of the second heat exchange part through the flow path formed by the through hole 222 formed by the engagement of the bridge, the first heat exchange part, and the second heat exchange part, and flows out through the fourth connection port that communicates with the first channel 303. For example, it returns to the compressor. Also, the sixth connection port 56 communicates the refrigerant returned from the front evaporator or the rear evaporator. The low-temperature refrigerant of this part flows to the first channel 303 through the second channel 304 of the second heat exchange part, exchanges heat with the high-temperature refrigerant flowing from the third channel 301 to the fourth channel 302, merges with other refrigerants in the first channel 303, and then returns to the compressor through the fourth connection port. In addition, the eighth connection port 58 allows the refrigerant returning from the rear evaporator or the front evaporator to communicate. The low-temperature refrigerant in this part flows to the fourth connection port through the flow path formed by engaging the connection member and the second heat exchange part to connect the groove 4211. After the refrigerants in the three parts merge, they return to the compressor through the fourth connection port. The flow direction described in this specification is neither limited nor a requirement for sealing, but just for explanation. Other components can be added. For example, other control valve members can be added in front of the compressor. The bridge 20 is further provided with a sensing element 250, for example, a second mounting part 207 for mounting a temperature sensing element. The temperature sensing sensor head 2501 penetrates the mounting part and is located in the flow path where the through hole 222 is located. In this way, the temperature of the refrigerant after passing through the first heat exchange part, that is, the outlet temperature of the evaporator, can be obtained.

[0031] Some refrigerant connection ports are provided on the connection member. In this way, during application, the connection becomes more convenient and the pipelines are also concentrated on the same side.

[0032] Regarding the heat exchange unit which is the fourth embodiment, it is shown in FIGS. 25 to 28. FIG. 25 is a perspective view of the heat exchange unit which is the fourth embodiment. FIG. 26 is an exploded view of the heat exchange unit. FIG. 27 is a perspective view of the bridge in the heat exchange unit. FIG. 28 is a front view of the bridge in FIG. 27 and cross-sectional views in the E - E direction and D - D direction.

[0033] The heat exchange unit includes a first heat exchange part 10, a throttling element 110, a bridge 20, a second heat exchange part 30, and a connection member. Most of the bridge 20 is located between the first heat exchange part 10 and the second heat exchange part 30. The connection member 40 is located on the other side of the second heat exchange part 30. That is, the bridge 20 and the connection member 40 are respectively arranged on both sides of the second heat exchange part. The first heat exchange part 10, the bridge 20, and the second heat exchange part 30 are fixed by welding, or the first heat exchange part 10, the bridge 20, the second heat exchange part 30, and the connection member are fixed by welding. The first heat exchange part 10 is larger than the second heat exchange part 30.

[0034] The first heat exchange unit 10 includes a heat exchange core. The first heat exchange unit 10 includes two flow paths for a fluid to flow through to perform heat exchange. There is a gap between the two fluid flow paths. The first heat exchange unit 10 includes an interlayer flow path separated by laminating sheets. At least two fluids flow through the first heat exchange unit 10. These two fluids can perform heat exchange in the first heat exchange unit. If one fluid is a refrigerant, the other can be a coolant for cooling a heat generating element such as a battery, or there can be three fluids. If one fluid is a refrigerant, the other two can be coolants. The two coolants are selected to perform heat exchange with the refrigerant by control. After being cooled by heat exchange, the coolant cools the components that require cooling. Hereinafter, two fluids will be described as an example.

[0035] The heat exchange unit according to the fourth embodiment includes a first connection port 51, a second connection port 52, a third connection port 53, a fourth connection port 54, a fifth connection port 55, and a sixth connection port 56. The first heat exchange unit is provided with a first connection port portion 101 and a second connection port portion 102. The bridge 20 is provided with a third connection port portion 211. The connection member 40 is provided with a fourth connection port 54, a fifth connection port 55, and a sixth connection port 56. The throttle element 110 and the bridge 20 are arranged to be fixed or position - restricted. The first heat exchange unit 10 includes four pore channels such as a first pore channel 103 and a second pore channel 104 (the other two are not shown). The first heat exchange unit 10 includes the first connection port portion 101 and the second connection port portion 102. The first connection port portion 101 includes a first connection port 51 for communicating with the coolant. The second connection port portion 102 includes a second connection port 52 for communicating with the coolant. The first connection port 51 and the second connection port 52 are communicated by the flow path of the heat exchange core. The first connection port portion 101 and the second connection port portion 102 may be a part of the side plate of the first heat exchange unit, or may be individually processed and welded to be fixed to the side plate and / or the heat exchange core of the first heat exchange unit.

[0036] The bridge 20 includes a first engaging portion 200 and a second engaging portion 200'. The first heat exchange portion 10 includes an engaging portion 100 that engages corresponding to the first engaging portion 200 of the bridge. The second heat exchange portion 30 includes an engaging portion 300 that engages corresponding to the second engaging portion 200' of the bridge. The engaging portion 100 of the first heat exchange portion 10, the engaging portion 300 of the second heat exchange portion 30, and the two engaging portions of the bridge all include flat surfaces. And, the holes or grooves for communication on the side of the first engaging portion 200 of the bridge, or the openings of the conduction portions, are located inside the first engaging portion. The periphery of each opening for communication is surrounded by the first engaging portion. The first heat exchange portion includes corresponding openings for communication at positions corresponding to the positions of the openings for communication of the bridge. Each opening for communication of the first heat exchange portion is located inside its engaging portion, and each opening for communication is surrounded by the engaging portion. Thus, after the engaging portion 100 of the first heat exchange portion 10 and the first engaging portion 200 of the bridge are welded and sealed, the opening for communication of the bridge can communicate with the corresponding opening for communication of the first heat exchange portion. In other words, the periphery of each opening for communication includes a part of the engaging portion, and both form a substantially sealed configuration with the engaging portions arranged opposite to each other. The first heat exchange portion 10 includes the opening of the first hole passage 103 and the opening of the second hole passage 104 on the side facing the bridge 20. The bridge 20 includes corresponding holes 2084 and 2091 on the side facing the first heat exchange portion 10. The opening of the hole 2084 corresponds to the position of the opening of the first hole passage 103 of the first heat exchange portion, and the opening of the hole 2091 corresponds to the position of the opening of the second hole passage 104 of the first heat exchange portion. Also, the bridge 20 further includes a groove 2080 on the side facing the first heat exchange portion 10. One side of the groove 2080 communicates with a hole 2081, and the other side of the groove further includes an inclined hole 2082. The other end of the inclined hole 2082 communicates with the hole of the mounting portion 209. In this way, the hole of the mounting portion 209 communicates with the hole 2081 through the inclined hole 2082 and the groove 2080.

[0037] The engaging portion 300 of the second heat exchange portion 30 corresponds to the position of the second engaging portion 200' of the bridge. After the two are welded and sealed, the openings for communication on the side of the bridge communicate with the openings for communication of the second heat exchange portion respectively. Specifically, the second heat exchange part 30 is provided with the openings of three channels, namely, the third channel 301, the fourth channel 302, and the first channel 303, on the side facing the bridge 20. The bridge 20 is provided with the opening of the diversion hole 202, the opening of the hole 2081, and the opening of the hole 2084 on the side facing the second heat exchange part 30, that is, the second engaging part. The opening of the third channel 301 of the second heat exchange part corresponds to the position of the opening of the diversion hole 202, the opening of the fourth channel 302 corresponds to the position of the opening of the hole 2081, and the opening of the first channel 303 corresponds to the position of the opening of the hole 2084.

[0038] The bridge 20 includes a third connection port 211, a second mounting part 207, and a mounting part 209. And the third connection port 211 is provided with a third connection port 53, includes a structure protruding to the outside, and may be integrally formed with the main body of the bridge, or may be a structure that is individually processed, welded, and fixed to the main body of the bridge. The second mounting part 207 engages and mounts the sensing element, and the mounting part 209 engages and mounts the throttle element. The hole of the second mounting part 207 communicates with the hole 2084, and the temperature sensing sensor head 2501 of the temperature sensing element is located in the flow path where the hole 2084 is located through the second mounting part 207. In this way, the temperature of the refrigerant after passing through the first heat exchange part, that is, the outlet temperature of the evaporator, can be obtained. Also, the mounting direction of the throttle element may be other directions. For example, the mounting part is arranged to extend from the side part of the bridge into the bridge, and the axis of the throttle element is substantially parallel to the length direction of the bridge.

[0039] In addition, three relief holes 2032 are provided in the bridge 20 to reduce the weight of the bridge, reduce the area of the plane part that supports welding, and improve the welding quality. The bridge 20 is further provided with fixing holes 221 for fixing.

[0040] The connecting member includes a connecting part one 431 and a connecting part two 432. The connection part 431 includes the fourth connection port 4, the connection part 432 is provided with the fifth connection port 55 and the sixth connection port 56, and the connection part 431 is provided with a space corresponding to and engaging with the first hole path 303 of the second heat exchange part 30, so as to realize the flow path from the first hole path 303 to the fourth connection port. Specifically, the form of the drawing may be used, or it may be fixed at the corresponding position around the first hole path 303 in the form of a joint. The fifth connection port 55 of the connection part 432 engages with the fourth hole path 302 of the second heat exchange part 30 in correspondence, and the sixth connection port 56 of the connection part 432 engages with the second hole path 304 of the second heat exchange part 30 in correspondence. The connection member further includes a fixing member 450 for fixing or position control. The connection part 431 and the connection part 432 are provided with fixing holes, and the fixing member 450 is fixed in the fixing hole 409 or arranged to be position-limited.

[0041] The heat exchange unit facilitates the mounting connection of the heat management system, reduces the connected pipelines, and reduces the volume of the system. Taking the application of the heat exchange unit to the vehicle heat management system as an example, here, when actually used, these parts are fixed. For the sake of clear explanation, the exploded view shows the flow mode of the refrigerant for easy explanation. In a specific vehicle heat management system, the vehicle heat management system includes a refrigerant system and a battery heat management system. Referring to FIG. 26 and other drawings, the battery heat management system includes the first connection port part 101, the second connection port part 102 of the heat exchange unit, and the flow path part communicating with the first connection port and the second connection port in the first heat exchange part. Then, the heat of the battery can be transferred to the coolant, flows through the flow path of the corresponding part of the first heat exchange part via the first connection port 51 or the second connection port 52, exchanges heat with the refrigerant in another flow path in the first heat exchange part, and after the coolant is cooled, it returns to cool the battery. The third connection port 53, the fourth connection port 54, the fifth connection port 55, and the sixth connection port 56 are each in communication with the refrigerant system. For example, the refrigerant cooled by the condenser enters the heat exchange unit through the third connection port 53, or the refrigerant passing through the liquid storage vessel enters the heat exchange unit through the third connection port 53. In this way, the high-temperature and high-pressure refrigerant reaches the third channel 301 of the second heat exchange part through the diversion hole 202, and after heat exchange with the refrigerant in another flow path in the second heat exchange part 30, it reaches the fourth channel 302. The refrigerant reaching the fourth channel 302 is divided into the following two parts. One part flows out from the fifth connection port 55 through the connection bipartite 432. For example, it communicates with the front evaporator or other evaporators through the fifth connection port 55, and a throttling element may be provided in front of the front evaporator. The refrigerant of the other part enters the throttling element 110 through the bridge hole 2081, the groove 2080, and the inclined hole 2082. After being throttled by the throttling element 110, it reaches the second channel 104 of the first heat exchange part 10 through the hole 2091, exchanges heat with the coolant in the coolant flow path in the refrigerant flow path of the first heat exchange part, reaches the first channel 103, and flows out through the bridge hole 2084, the first channel 303 of the second heat exchange part, and the fourth connection port communicating with the first channel 303. For example, it returns to the compressor. Also, the sixth connection port 56 communicates with the refrigerant returning from the front evaporator or other evaporators. The low-temperature refrigerant in this part flows to the first channel 303 through the second channel 304 of the second heat exchange part, exchanges heat with the high-temperature refrigerant flowing from the third channel 301 to the fourth channel 302, and after the two parts of the refrigerant merge at the first channel 303, it returns to the compressor through the fourth connection port. In this way, a part of the low-temperature refrigerant cools the high-temperature refrigerant, reduces the condensation temperature of the refrigerant, and does not increase the temperature of the refrigerant returning to the compressor. The flow direction in this specification is for illustration only, not a limitation nor a requirement for airtightness. Other components may be added. For example, other control valve members etc. may be added in front of the compressor.

[0042] Furthermore, regarding the heat exchange unit which is the fifth embodiment, it is shown in FIGS. 29 to 32. FIG. 29 is a perspective view of the heat exchange unit which is the fifth embodiment, FIG. 30 is an exploded view of the heat exchange unit, FIG. 31 is a view of the bridge in the heat exchange unit, and FIG. 32 is a view of the bridge in FIG. 31 from another direction and cross-sectional views in the G - G direction and F - F direction. The heat exchange unit includes a first heat exchange part 10, a throttle element 110, a bridge 20, a second heat exchange part 30, and a connecting member. Most of the bridge 20 is located between the first heat exchange part 10 and the second heat exchange part 30. The connecting member is located on the other side of the second heat exchange part 30. That is, the bridge 20 and the connecting member are respectively provided on both sides of the second heat exchange part. The first heat exchange part 10, the bridge 20, and the second heat exchange part 30 are fixed by welding, or the first heat exchange part 10, the bridge 20, the second heat exchange part 30, and the connecting member are fixed by welding. The first heat exchange part 10 is larger than the second heat exchange part 30.

[0043] The first heat exchange part 10 is provided with a heat exchange core. The first heat exchange part 10 includes at least two flow paths for at least a fluid to flow through and perform heat exchange. There is a gap between the two fluid flow paths. The first heat exchange part 10 includes an interlayer flow path separated by laminating sheets. At least two fluids flow through the first heat exchange part 10, and the two fluids can perform heat exchange in the first heat exchange part. If one fluid is a refrigerant, the other may be a coolant for cooling a heat generating element such as a battery or for cooling the interior of the vehicle, or there may be three fluids. If one fluid is a refrigerant, the other two may be coolants. The two coolants are selected to perform heat exchange with the refrigerant by control. After being cooled by heat exchange, the coolant cools the components that require cooling. Hereinafter, two fluids will be described as an example.

[0044] The heat exchange unit includes a first connection port 51, a second connection port 52, a third connection port 53, a fourth connection port 54, a fifth connection port 55, and a sixth connection port 56. The first heat exchange section is provided with a first connection port 101 and a second connection port 102. The bridge 20 is provided with a third connection port 211. The connection member is provided with a fourth connection port 54, a fifth connection port 55, and a sixth connection port 56. The throttle element 110 and the bridge 20 are arranged so as to be fixed or position - restricted. The first heat exchange section 10 includes, for example, four passageways such as a first passageway 103 and a second passageway 104 (two passageways communicating with the coolant are not shown). The first heat exchange section 10 includes a first connection port 101 and a second connection port 102. The first connection port 101 is provided with a first connection port 51 for communicating with the coolant. The second connection port 102 is provided with a second connection port 52 for communicating with the coolant. The first connection port 51 and the second connection port 52 are communicated with each other by the flow path of the heat exchange core. The first connection port 101 and the second connection port 102 may be a part of the side plate of the first heat exchange section, or may be individually processed and welded to be fixed to the side plate and / or the heat exchange core of the first heat exchange section. The first connection port and the second connection port may further be fixed to the first heat exchange section in the form of a pipe connection member.

[0045] The bridge 20 is provided with a first engaging portion 200 and a second engaging portion 200'. The first heat exchange portion 10 is provided with an engaging portion 100 that engages corresponding to the first engaging portion 200 of the bridge. The second heat exchange portion 30 is provided with an engaging portion 300 that engages corresponding to the second engaging portion 200' of the bridge. The engaging portion 100 of the first heat exchange portion 10, the engaging portion 300 of the second heat exchange portion 30, and the two engaging portions of the bridge all include a flat surface portion. The holes or grooves for communication on the side of the first engaging portion 200 of the bridge, or the mouth portions of the conducting portions, are located inside the first engaging portion. The periphery of each mouth portion for communication is surrounded by the first engaging portion. The first heat exchange portion is provided with corresponding mouth portions for communication at positions corresponding to the positions of the mouth portions for communication of the bridge. Each mouth portion for communication of the first heat exchange portion is located inside its engaging portion, and each mouth portion for communication is surrounded by the engaging portion. In this way, after the engaging portion 100 of the first heat exchange portion 10 and the first engaging portion 200 of the bridge are welded and sealed, the mouth portion for communication of the bridge can communicate with the corresponding mouth portion for communication of the first heat exchange portion. In other words, the periphery of each mouth portion for communication includes a part of the engaging portion, and both form a substantially sealed configuration in the engaging portions arranged opposite to each other. The first heat exchange portion 10 is provided with the mouth portion of the first hole passage 103 and the mouth portion of the second hole passage 104 on the side facing the bridge 20. The bridge 20 is provided with corresponding holes 2084 and 2091 on the side facing the first heat exchange portion 10. The mouth portion of the hole 2084 corresponds to the position of the mouth portion of the first hole passage 103 of the first heat exchange portion, and the mouth portion of the hole 2091 corresponds to the position of the mouth portion of the second hole passage 104 of the first heat exchange portion. In addition, the bridge 20 is further provided with a groove 2080 on the side facing the first heat exchange portion 10. The groove 2080 communicates with the hole 2081'. The other side of the groove is further provided with an inclined hole 2082. The other end of the inclined hole 2082 communicates with the hole of the mounting portion 209. In this way, the hole of the mounting portion 209 communicates with the hole 2081' through the inclined hole 2082 and the groove 2080.

[0046] The engaging portion 300 of the second heat exchange portion 30 corresponds to the position of the second engaging portion 200' of the bridge. After the two are welded and sealed, the mouth portion for communication on this side of the bridge communicates corresponding to the mouth portion for communication of the second heat exchange portion. Specifically, on the side facing the bridge 20, the second heat exchange part 30 is provided with the mouths of three channels, namely, the third channel 301, the fourth channel 302, and the first channel 303. On the side facing the second heat exchange part 30, the bridge 20 is provided with the mouth of the flow guiding hole 202, the mouth of the hole 2081’, and the mouth of the hole 2084. The mouth of the third channel 301 of the second heat exchange part corresponds to the position of the mouth of the flow guiding hole 202, the mouth of the fourth channel 302 corresponds to the position of the mouth of the hole 2081’, and the mouth of the first channel 303 corresponds to the position of the mouth of the hole 2084.

[0047] And the bridge 20 includes a third connection port 211, a second mounting part 207, and a mounting part 209. Also, the third connection port 211 is provided with a third connection port 53 and includes a configuration that protrudes to the outside. The third connection port 211 may be integrally formed with the main body of the bridge, or may be a configuration that is individually processed, welded, and fixed to the main body of the bridge. The second mounting part 207 engages and mounts the sensing element 250, and the mounting part 209 engages and mounts the throttle element 110. The hole of the second mounting part 207 communicates with the hole 2084. The sensing element, for example, the temperature sensing element and the temperature sensing sensor head 2501, passes through the second mounting part 207 and is located in the flow path where the hole 2084 is located. In this way, the temperature of the refrigerant after passing through the first heat exchange part, in other words, the outlet temperature of the evaporator, can be obtained.

[0048] Also, four relief holes 2032 are provided in the bridge 20 to reduce the weight of the bridge, reduce the area of the flat part that assists welding, and improve the welding quality. The bridge 20 is further provided with a fixing hole 221 for fixing.

[0049] The connecting member includes a first connecting part 441 and a second connecting part 442, and the first connecting part 441 includes a fourth connection port 54. The connecting two-part 442 is provided with a fifth connection port 55 and a sixth connection port 56. The connecting one-part 441 is provided with a space that engages corresponding to the first hole path 303 of the second heat exchange part 30, thereby realizing the flow path from the first hole path 303 to the fourth connection port. Also, it may be fixed at the corresponding position around the first hole path 303 in the form of a joint. The fifth connection port 55 of the connecting two-part 442 engages corresponding to the fourth hole path 302 of the second heat exchange part 30, and the sixth connection port 56 of the connecting two-part 442 engages corresponding to the second hole path 304 of the second heat exchange part 30. The connecting member further includes a fixing member 450 for fixing or position control. The connecting one-part 441 and the connecting two-part 442 are provided with fixing holes 409, and the fixing member 450 is fixed in the fixing holes 409 or arranged to be position-limited.

[0050] The heat exchange unit facilitates the mounting connection of the heat management system, reduces the connected pipelines, and reduces the volume of the system. Taking the application of this heat exchange unit to a vehicle heat management system as an example, here, when actually used, these components are fixed. This exploded view shows the refrigerant flow mode for easy explanation. In a specific vehicle heat management system, the vehicle heat management system includes a refrigerant system and a battery heat management system. Referring to FIG. 30 and other drawings, the battery heat management system includes the first connection port part 101, the second connection port part 102 of the heat exchange unit, and the flow path parts in the first heat exchange part that communicate with the first connection port and the second connection port. Then, the heat of the battery can be transferred to the coolant, flow through the flow path of the corresponding part of the first heat exchange part via the first connection port 51 or the second connection port 52, perform heat exchange with the refrigerant in another flow path in the first heat exchange part, and after the coolant is cooled, return to cool the battery. The third connection port 53, the fourth connection port 54, the fifth connection port 55, and the sixth connection port 56 communicate the refrigerant system. For example, the refrigerant cooled by the condenser enters the heat exchange unit through the third connection port 53 via the bridge, or the refrigerant passing through the liquid reservoir enters the heat exchange unit through the third connection port 53. In this way, the high-temperature and high-pressure refrigerant reaches the third channel 301 of the second heat exchange part through the flow guide hole 202, and after exchanging heat with the refrigerant in another flow path in the second heat exchange part 30, it reaches the fourth channel 302. The refrigerant reaching the fourth channel 302 is divided into the following two parts. One part flows out from the fifth connection port 55 through the connection bipartite 432. For example, it leads to the front evaporator or other evaporators through the fifth connection port 55. A throttling element may be provided in front of the front evaporator. The refrigerant of the other part enters the throttling element 110 through the hole 2081' of the bridge, the groove 2080, and the inclined hole 2082, and after being throttled by the throttling element 110, it reaches the second channel 104 of the first heat exchange part 10 through the hole 2091. In the refrigerant flow path of the first heat exchange part, it exchanges heat with the coolant in the coolant flow path and reaches the first channel 103, and then flows out through the hole 2084 of the bridge, the first channel 303 of the second heat exchange part, and the fourth connection port communicating with the first channel 303. For example, it returns to the compressor. Also, the sixth connection port 56 communicates the refrigerant returning from the front evaporator or other evaporators. The low-temperature refrigerant in this part flows to the first channel 303 through the second channel 304 of the second heat exchange part, and exchanges heat with the high-temperature refrigerant flowing from the third channel 301 to the fourth channel 302. After the two parts of the refrigerant merge in the first channel 303, it returns to the compressor through the fourth connection port. In this way, a part of the low-temperature refrigerant cools the high-temperature refrigerant, reduces the condensation temperature of the refrigerant, and does not increase the temperature of the refrigerant returning to the compressor. The flow direction in this specification is for illustration only, not a limitation nor a requirement for sealing. Other components may be added. For example, other control valve members etc. may be added in front of the compressor.

[0051] Regarding the heat exchange unit according to the sixth embodiment, which is shown in FIGS. 33 to 37. FIG. 33 is a perspective view of the heat exchange unit according to the sixth embodiment, FIG. 34 is an exploded view of the heat exchange unit, FIG. 35 is a perspective view of the bridge in the heat exchange unit viewed from two directions, FIG. 36 is a front view and a rear view of the bridge in FIG. 35, and FIG. 37 is a perspective view of the connecting member in the heat exchange unit in FIG. 33 viewed from two directions. The heat exchange unit includes a first heat exchange section 10, a throttle element 110, a bridge 20, a second heat exchange section 30, and a connecting member 45. Most of the bridge 20 is located between the first heat exchange section 10 and the second heat exchange section 30. The connecting member 45 is located on the other side of the second heat exchange section 30. That is, the bridge 20 and the connecting member 45 are respectively provided on both sides of the second heat exchange section. The first heat exchange section 10, the bridge 20, and the second heat exchange section 30 are fixed by welding, or the first heat exchange section 10, the bridge 20, the second heat exchange section 30, and the connecting member are fixed by welding.

[0052] The first heat exchange section 10 includes a heat exchange core. The first heat exchange section 10 includes two flow paths for a fluid to flow through for heat exchange. There is a gap between the two fluid flow paths. The first heat exchange section 10 includes an interlayer flow path separated by laminating sheets. And at least two fluids flow through the first heat exchange section 10. The two fluids can perform heat exchange in the first heat exchange section. If one fluid is a refrigerant, the other fluid can be a coolant for cooling a heat generating element such as a battery, or three fluids can be used. If one fluid is a refrigerant, the other two fluids can be coolants. The two coolants are selected to perform heat exchange with the refrigerant by control. After being cooled by heat exchange, the coolant cools the components that require cooling. Specifically, two fluids are taken as an example for explanation.

[0053] The heat exchange unit includes a first connection port 51, a second connection port 52, a third connection port 53, a fourth connection port 54, a fifth connection port 55, and a sixth connection port 56. The first heat exchange part is provided with a first connection port 101 and a second connection port 102. The bridge 20 is provided with a third connection port 211. The connection member 45 is provided with a fourth connection port 54, a fifth connection port 55, and a sixth connection port 56. The throttle element 110 and the first heat exchange part 10 are arranged to be fixed or position-limited. The first heat exchange part 10 includes, for example, four pore channels such as a first pore channel 103 and a second pore channel 104 (not fully shown). The first heat exchange part further arranges a pipe having a communication port 105 in the second pore channel 104. The second pore channel 104 is not communicated on the side close to the bridge, and the communication port 105 communicates with the inlet of the throttle element 110. The first connection port 101 of the first heat exchange part 10 is provided with a first connection port 51 for communicating with the coolant. The second connection port 102 is provided with a second connection port 52 for communicating with the coolant. The first connection port 51 and the second connection port 52 are communicated by the flow path of the heat exchange core. The first connection port 101 and the second connection port 102 may be part of the side plate of the first heat exchange part, or may be individually processed and welded to be fixed to the side plate and / or the heat exchange core of the first heat exchange part.

[0054] The bridge 20 is provided with a first engaging portion 200 and a second engaging portion 200'. The first heat exchange portion 10 is provided with an engaging portion 100 that engages corresponding to the first engaging portion 200 of the bridge. The second heat exchange portion 30 is provided with an engaging portion 300 that engages corresponding to the second engaging portion 200' of the bridge. The engaging portion 100 of the first heat exchange portion 10, the engaging portion 300 of the second heat exchange portion 30, and the two engaging portions of the bridge all include flat surfaces. The holes or grooves for communication provided on the side of the first engaging portion 200 of the bridge, or the openings of the conducting portions, are all located inside the first engaging portion. The periphery of each communication opening is surrounded by the first engaging portion. The first heat exchange portion is provided with corresponding communication openings at positions corresponding to the positions of the communication openings of the bridge. Each communication opening of the first heat exchange portion is located inside its engaging portion, and each communication opening is surrounded by the engaging portion. In this way, after the engaging portion 100 of the first heat exchange portion 10 and the first engaging portion 200 of the bridge are welded and sealed, the communication openings of the bridge can communicate with the corresponding communication openings of the first heat exchange portion. In other words, the periphery of each communication opening includes a part of the engaging portion. And both of them form a substantially sealed configuration in the engaging portions arranged opposite to each other. The engaging portion 300 of the second heat exchange portion 30 corresponds to the position of the second engaging portion 200' of the bridge. After the two are welded and sealed, the communication openings on this side of the bridge all communicate with the communication openings of the second heat exchange portion. Specifically, the second heat exchange portion 30 is provided with the openings of three hole passages, namely, a third hole passage 301, a fourth hole passage 302, and a first hole passage 303, on the side facing the bridge 20. The bridge 20 is provided with the opening of a flow guiding groove 264, the opening of a hole 262, and the opening of a hole 266 on the side facing the second heat exchange portion 30, that is, on the second engaging portion. The diameter of the hole 266 is greater than or equal to the diameter of the hole 262. The opening of the third hole passage 301 of the second heat exchange portion corresponds to a part of the position of the opening of the flow guiding groove 264. The opening of the fourth hole passage 302 corresponds to the position of the opening of the hole 262. The opening of the first hole passage 303 corresponds to the position of the opening of the hole 266. The flow guiding groove 264 includes a first portion 2641, a second portion 2642, and a transition portion 2640. And the first part 2641 is relatively close to the third connection port, the second part 2642 is relatively far from the third connection port, and the transition part 2640 is located between the first part 2641 and the second part 2642. The depth of the first part 2641 is greater than the depth of the second part 2642. The depth of the part of the first part 2641 close to the third connection port is half or more of the thickness of the bridge, or close to half of the thickness of the bridge. For example, the depth is 1 / 3 or more of the thickness of the bridge and less than 2 / 3 of the thickness of the bridge. The first part 2641 communicates with the third connection port. On the side opposite to the bridge and the first heat exchange part, the first heat exchange part 10 is provided with an opening of the first pore channel 103 and a communication port 105 communicating with the throttle element on the side facing the bridge 20. The bridge 20 is provided with a third groove 263 and a fourth groove 265 corresponding to the side facing the first heat exchange part 10. The third groove 263 communicates with a small hole 262, and the fourth groove 265 communicates with a large hole 266. A part of the opening of the fourth groove 265 corresponds to the position of the opening of the first pore channel 103 of the first heat exchange part, and the opening of the third groove 263 communicates corresponding to the communication port 105 communicating with the throttle element. At least a part of the front projection of either the flow guiding groove 264 or the third connection port 53 is located in the third groove 263. At least a part of the front projection of the flow guiding groove 264 is located in the fourth groove 265. The flow guiding groove 264 and the fourth groove 265 are at least partially back-to-back and do not communicate directly. Here, numbers such as the first, second, third, and fourth do not specify the number of grooves or holes, but are only for distinguishing and explaining.

[0055] The bridge 20 includes a third connection port part 211. The third connection port part 211 includes a third connection port 53 and includes a configuration protruding to the outside. It may be integrally formed with the main body of the bridge, or may be a configuration processed individually and welded to be fixed to the main body of the bridge. In addition, two relief holes 2032 are provided in the bridge 20. The first part 2641 of the diversion groove 264 is close to the third connection port, the second part 2642 of the diversion groove 264 is relatively far from the third connection port, the diversion groove 264 is arranged to extend along the substantially longitudinal direction, the third connection port 53 communicates with the first part 2641 of the diversion groove 264, the depth of the second part 2642 of the diversion groove 264 is less than half of the thickness of the bridge, and further, it is 0.4 times or less of the thickness of the bridge. The depth of the fourth groove 265 is less than half of the thickness of the bridge, the depth of the third groove 263 is less than half of the thickness of the bridge, and further, the depth of the fourth groove 265 is 0.4 times or less of the thickness of the bridge, and the depth of the third groove 263 is 0.4 times or less of the thickness of the bridge. In this way, grooves are respectively arranged on both sides of the bridge so as to form relatively independent flow paths with the two heat exchange parts, and the whole unit is made smaller. In this specification, the thickness of the bridge refers to the thickness of the two engaging parts of the bridge. The bridge 20 is further provided with two shoulders 212 and 213, at least a part of the shoulders 212 and 213 protrudes from the main body part, the bridge 20 is provided with a fixing hole 221, and the fixing hole is provided at at least one shoulder or a location close to the shoulder.

[0056] In this specification, the relief hole 2032 is for reducing weight and welding the bridge to the first heat exchange part and the second heat exchange part. The hole 2032 penetrates from the side of the bridge close to the first heat exchange part to the side close to the second heat exchange part. The hole 2032 does not communicate with the hole path of the first heat exchange part, the hole path of the second heat exchange part, and the communication hole or groove of the bridge. The distance from the hole 2032 to the communication hole facing or close to the first heat exchange part of the bridge is 1.5 mm or more. The distance from the hole 2032 to the communication groove facing or close to the first heat exchange part of the bridge is 1.5 mm or more. The distance from the hole 2032 to the communication hole facing or close to the second heat exchange part of the bridge is 1.5 mm or more. The distance from the hole 2032 to the communication groove facing or close to the second heat exchange part of the bridge is 1.5 mm or more. The meat extraction holes are not necessarily through holes. For example, if both sides of the bridge are recessed inside respectively and blind holes or grooves are formed on both sides respectively, both can reduce the weight and contribute to welding, while the through hole only contributes to processing. The connection member 45 includes a main body portion 4510 and an extending portion 4511. The connection member 40 is provided with a fourth connection port 54, a fifth connection port 55, a sixth connection port 56, and a fixing hole 459 for engagement fixing or position limitation. The connection member 45 is provided with a groove 455 on the side facing the second heat exchange portion 30. The groove 455 has a configuration similar to a blind hole. The groove 455 extends from the extending portion to the position where the sixth connection port 56 is located and communicates with the sixth connection port 56. The connection member further includes a fixing member 450 for fixing or position control. The fixing member 450 is fixed to the fixing hole 409 or arranged to be position-limited. The second heat exchange portion is provided with a fourth hole path 302, a first hole path 303, and a second hole path 304 facing the connection member 40. The fourth connection port 54 of the connection member 40 corresponds to the first hole path 303, the fifth connection port 55 corresponds to the fourth hole path 302, and the sixth connection port 56 corresponds to and communicates with the second hole path 304 through the groove 455.

[0057] The heat exchange unit facilitates the mounting connection of the heat management system, reduces the connected pipelines, and reduces the volume of the heat management system. Taking the application of the heat exchange unit to a vehicle heat management system as an example, here, when actually used, these components are relatively fixed. The exploded view shows the flow mode of the refrigerant for easy explanation. In a specific vehicle heat management system, the vehicle heat management system includes a refrigerant system and a battery heat management system. Referring to FIG. 34 and other drawings, the battery heat management system includes a first connection port portion 101, a second connection port portion 102 of the heat exchange unit, and a flow path portion that communicates with the first connection port and the second connection port in the first heat exchange portion. Then, the heat of the battery can be transferred to the coolant, flow through the flow path of the corresponding part of the first heat exchange part via the first connection port 51 or the second connection port 52, exchange heat with the refrigerant in another flow path in the first heat exchange part, return after the coolant is cooled, and cool the battery. The third connection port 53, the fourth connection port 54, the fifth connection port 55, and the sixth connection port 56 are each in communication with the refrigerant system. For example, the refrigerant cooled by the condenser enters the heat exchange unit through the third connection port 53, or the refrigerant that has passed through the liquid storage enters the heat exchange unit through the third connection port 53. In this way, the high-temperature and high-pressure refrigerant reaches the third orifice 301 of the second heat exchange part through the engagement between the bridge and the second heat exchange part and the flow path formed by the space where the flow guide groove 264 is located. After heat exchange with the refrigerant in another flow path in the second heat exchange part 30, it reaches the fourth orifice 302. The refrigerant that reaches the fourth orifice 302 is divided into the following two parts. One part flows out through the connecting member 45 and the fifth connection port 55. For example, it leads to the front evaporator or other evaporators through the fifth connection port 55. Before the evaporator, a throttling element is provided or throttled, and then it is divided and leads to two evaporators, or after being divided and throttled, it may enter the evaporator. The refrigerant of the other part enters the throttling element 110 through the hole 262 of the bridge, the flow path formed by the space where the engagement part between the bridge and the first heat exchange part engages and the third groove 263 is located, and the communication port 105 communicating with the throttling element. After being throttled by the throttling element 110, it enters the second orifice 104 of the first heat exchange part 10, exchanges heat with the coolant in the coolant flow path in the refrigerant flow path of the first heat exchange part, reaches the first orifice 103, and reaches the first orifice 303 of the second heat exchange part through the flow path and the hole 266 formed by the space where the engagement part between the bridge and the first heat exchange part engages and the fourth groove 265 is located, and flows out through the fourth connection port corresponding to the first orifice 303. For example, it returns to the compressor. Also, the sixth connection port 56 communicates the refrigerant returned from the front evaporator and / or other evaporators. The low-temperature refrigerant in this part flows through the flow path formed by the space where the connecting member 45 and the second heat exchange part engage and the groove 455 is located to the second orifice 304 and the first orifice 303 of the second heat exchange part, exchanges heat with the high-temperature refrigerant flowing from the third orifice 301 to the fourth orifice 302, and after the two parts of the refrigerant merge at the first orifice 303, it returns to the compressor through the fourth connection port 54. In this way, some of the low-temperature refrigerant cools the high-temperature refrigerant, reduces the condensation temperature of the refrigerant, and does not increase the temperature of the refrigerant returning to the compressor. The bridge 20 is further provided with a sensing element 250, for example, a second mounting portion 207 for mounting a temperature sensing element. The temperature sensing sensor head 2501 penetrates the mounting portion and is located in the flow path where the hole 266 and / or the fourth groove 265 are located. Thereby, the temperature of the refrigerant after passing through the first heat exchange portion, in other words, the outlet temperature of the evaporator can be obtained. This second heat exchange portion realizes the heat exchange between the high-temperature refrigerant and a part of the low-temperature refrigerant, reduces the temperature of the high-temperature refrigerant, and does not excessively increase the temperature of the refrigerant returning to the compressor, thereby improving the efficiency.

[0058] This heat exchange unit includes a first heat exchange portion, a bridge, and a second heat exchange portion. At least a part of the bridge is located between the first heat exchange portion and the second heat exchange portion. The bridge can easily realize the fluid communication mode between the two heat exchange portions. For different system needs, it can be realized by changing the configuration of the bridge, simplifying the pipeline of the system, reducing the arrangement of the pipeline between the connection ports, and making the system connection simple and easy. The refrigerant flow path of the first heat exchange portion of the above unit may be a single flow, that is, it may flow from the second hole path 104 to the first hole path 103, or may be a triple flow. That is, the first heat exchange portion is divided into approximately three parts in the lateral direction. The first flow flows from the lowermost part of the second hole path 104 to the lowermost part of the first hole path 103, then from the middle part of the first hole path 103 to the middle part of the second hole path 104, and then from the upper part of the second hole path 104 to the upper part of the first hole path 103. Therefore, only the case of flowing out from the first hole path 103 in the embodiment will be described. Unless otherwise specified, the thickness of the bridge refers to the thickness between the flat portions of the two engaging portions of the bridge. The flow direction described in this specification is for illustration purposes only, not for limitation or airtightness requirements. Other components can be added, for example, other control valve members can be added in front of the compressor. For example, leading to the evaporator includes arranging a throttling element in front of the evaporator and further providing a control valve, etc. In this specification, the second pore channel 104 of the first heat exchange part communicates with the outlet of the throttling element 110. When facing the bridge, generally, no opening needs to be arranged, and the drawings only show the position of the pore channel. These can be changed according to the actual system, and the communication situation does not exclude, for example, the situation where the first connection port communicates with the second connection port and at the same time also communicates with other connection ports.

[0059] Here, the above embodiments are for explaining the present invention. For example, the definitions of directions such as "front", "rear", "left", "right", "upper", "lower", etc. In this specification, the present invention has already been described in detail with reference to the above embodiments. However, as can be understood by those skilled in the art, corrections, combinations, or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. All improvements that do not deviate from the spirit and scope of the present invention shall fall within the scope of the claims of this solution.

Claims

1. A heat exchange unit including a first heat exchange section (10), a bridge (20), a second heat exchange section (30), and a connecting member, at least a part of the bridge (20) is located between the first heat exchange section (10) and the second heat exchange section (30), the first heat exchange section (10), the bridge (20), and the second heat exchange section (30) are fixed by welding, at least a part of the second heat exchange section (30) is located between the bridge (20) and the connecting member, the first heat exchange section (10) includes a heat exchange core and at least two fluid flow paths that do not communicate with each other, the heat exchange unit includes at least six connection ports, namely a first connection port (51), a second connection port (52), a third connection port (53), a fourth connection port (54), a fifth connection port (55), and a sixth connection port (56), the heat exchange unit includes a first connection port section where the first connection port (51) is provided and a second connection port section where the second connection port (52) is provided, the first heat exchange section (10) includes the first connection port section and the second connection port section, or is fixedly arranged on the first connection port section and the second connection port section, the heat exchange unit further includes a third connection port section where the third connection port (53) is provided, the bridge (20) includes the third connection port section, or the connecting member includes the third connection port section, the first connection port (51) and the second connection port (52) communicate with each other through one of the at least two fluid flow paths, the connecting member is provided with the fourth connection port (54), the fifth connection port (55), and the sixth connection port (56), the second heat exchange section (30) includes four pore channels, namely a first pore channel (303), a second pore channel (304), a third pore channel (301), and a fourth pore channel (302), the third connection port (53) communicates with the third pore channel (301) of the second heat exchange section (30), the connecting member is fixedly connected to the second heat exchange section (30), the sixth connection port (56) communicates with the second pore channel (304) of the second heat exchange section (30), the first pore channel (303) of the second heat exchange section (30) communicates with the second pore channel (304) of the second heat exchange section (30), the third pore channel (301) of the second heat exchange section (30) communicates with the fourth pore channel (302) of the second heat exchange section (30), the fourth connection port (54) communicates with the first pore channel (303) of the second heat exchange section (30), The fifth connection port (55) communicates with the fourth channel (302) of the second heat exchange part (30). The sixth connection port (56) communicates with the fourth connection port (54) through the second heat exchange part (30), or communicates with the fourth connection port (54) through a flow path. The first heat exchange part (10) includes two channels, namely a first channel (103) and a second channel (104). The first channel (103) of the first heat exchange part (10) and the second channel (104) of the first heat exchange part (10) communicate with each other through another fluid flow path among the at least two fluid flow paths. The first channel (103) of the first heat exchange part (10) communicates with the first channel (303) of the second heat exchange part (30) through the bridge (20). The bridge (20) includes two communication holes and / or grooves facing the first heat exchange part (10). The bridge (20) includes at least two holes and / or grooves communicating with the second heat exchange part (30). The openings of the holes and / or grooves in the bridge (20) that can communicate with the second heat exchange part (30) face the second heat exchange part (30). A heat exchange unit in which the communication holes and / or grooves in the bridge (20) facing the first heat exchange part (10) and the holes and / or grooves in the bridge (20) that can communicate with the second heat exchange part (30) are communicating with each other or are the same holes and / or grooves.

2. The connection member includes a main body part (4010, 4510) and an extending part (4011, 4511). At least three connection ports of the heat exchange unit are provided on the main body part (4010, 4510). The connection member is provided with grooves (405, 455) on the side facing the second heat exchange part (30). The heat exchange unit according to claim 1, wherein the grooves (405, 455) communicate one channel of the second heat exchange part (30) with at least one of the connection ports, a part of which is located on the main body part (4010, 4510), and the other part is located on the extending part (4011, 4511).

3. The connection member includes a connection block (411), a connection plate (412), and two or three pipe connection engaging parts (4131, 4132, 4133). The connection block (411), the connection plate (412), and the pipe connection engaging parts (4131, 4132, 4133) are fixed by welding. The connecting member, the second heat exchange part (30), the bridge (20), and the first heat exchange part (10) are fixed by welding. The thickness of the connection block (411) is greater than the thickness of the connection plate (412). At least one connection port is provided in each of the connection pipe engaging parts (4131, 4132, 4133). At least four through holes (4121, 4122, 4123, 4124, 4125) are provided in the connection plate (412). At least three through holes (4111, 4112, 4113) are provided in the connection block (411). Each connection port of the connection pipe engaging parts (4131, 4132, 4133) communicates with one through hole of the connection plate (412). Each through hole of the connection plate (412) communicates with one through hole of the connection block (411). At least one through hole of the connection block (411) communicates with two through holes of the connection plate (412). Each through hole of the connection block (411) communicates with at least one through hole of the connection plate (412). The heat exchange unit according to claim 1, wherein the connection block (411) includes at least two through holes respectively communicating with the pore channels of the second heat exchange part (30).

4. The heat exchange unit according to any one of claims 1 to 3, further comprising a seventh connection port (57) provided on the connecting member and communicating with the fourth pore channel (302) of the second heat exchange part (30).

5. The heat exchange unit further includes a seventh connection port (57) and an eighth connection port (58) provided on the connecting member. The seventh connection port (57) communicates with the fourth pore channel (302) of the second heat exchange part (30). The heat exchange unit according to any one of claims 1 to 3, wherein the eighth connection port (58) communicates with the fourth connection port (54) through the second heat exchange part (30), or the eighth connection port (58) communicates with the fourth connection port (54) through a flow path.

6. The heat exchange unit further includes a throttle element (110). The bridge (20) includes a mounting part (209). The throttle element (110) is arranged to be fixed or position-limited to the bridge (20). The throttle element (110) is fixed or position-limited to the mounting part (209). The heat exchange unit according to claim 4 or claim 5, wherein one connection port of the throttle element (110) communicates with the second hole path (104) of the first heat exchange part.

7. The two holes and / or grooves in the bridge (20) that communicate with the first heat exchange part (10) include a hole (2091), The hole (2091) is located in the mounting part (209) and communicates with the outlet of the throttle element (110), The outlet of the throttle element (110) communicates with the second hole path (104) of the first heat exchange part through the hole (2091), The other hole and / or groove in the bridge (20) that communicates with the first heat exchange part (10) communicates with the first hole path (103) of the first heat exchange part, One of the two holes and / or grooves in the bridge (20) that can communicate with the second heat exchange part (30) communicates with the first hole path (303) of the second heat exchange part, The heat exchange unit according to claim 6, wherein the other hole and / or groove that communicates with the second heat exchange part (30) communicates the inlet of the throttle element (110) with the fourth hole path (302) of the second heat exchange part (30).

8. The size of the second heat exchange part (30) is smaller than that of the first heat exchange part (10), At least a part of the mounting part (209) protrudes from the second heat exchange part (30), The bridge (20) is provided with corresponding holes (2084) for circulation, The hole (2084) corresponds to or communicates with the position of the first hole path (103) of the first heat exchange part (10), and corresponds to or communicates with the position of the first hole path (303) of the second heat exchange part (30), The bridge (20) further includes a groove (2080) on the side facing the first heat exchange part (10), The bridge (20) includes through holes (2081, 2081'), On one side of the groove (2080), the holes (2081, 2081') are provided, or one side of the groove (2080) communicates with the holes (2081, 2081'), and on the other side of the groove (2080), there is further provided an inclined hole (2082) that communicates the hole of the mounting part (209) with the groove (2080), The heat exchange unit according to claim 6, wherein the inlet of the throttle element (110) communicates with the fourth hole path (302) of the second heat exchange part (30) through the inclined hole (2082), the groove (2080), and the holes (2081, 2081').

9. The bridge (20) includes a first engaging portion (200) and a second engaging portion (200'), The first heat exchange portion (10) includes an engaging portion (100), The engaging portion (100) of the first heat exchange portion (10) is engaged corresponding to the first engaging portion (200) of the bridge (20), The second heat exchange portion (30) includes an engaging portion (300), The engaging portion (300) of the second heat exchange portion (30) is engaged corresponding to the second engaging portion (200') of the bridge (20), The engaging portion (100) of the first heat exchange portion (10), the engaging portion (300) of the second heat exchange portion (30), and the two engaging portions of the bridge (20) include a flat portion, The mouth of the communication hole or groove facing or close to the first heat exchange portion (10) in the bridge (20) is located inside the first engaging portion (200), The heat exchange unit according to any one of claims 1 to 8, wherein the mouth close to the second heat exchange portion (30) of the hole or groove communicable with the second heat exchange portion (30) in the bridge (20) is located inside the second engaging portion (200').

10. The bridge includes at least a relief hole (2032), The relief hole (2032) is not communicated with the hole path of the first heat exchange portion (10), the hole path of the second heat exchange portion (30), and the communication hole or groove of the bridge (20), The distance from the relief hole (2032) to the communication hole or groove facing or close to the first heat exchange portion (10) in the bridge (20) is 1.5 mm or more, The heat exchange unit according to any one of claims 1 to 9, wherein the distance from the relief hole (2032) to the communication hole or groove facing or close to the second heat exchange portion (30) in the bridge (20) is 1.5 mm or more.

11. A vehicle thermal management system including a refrigerant flow path and a coolant flow path, The vehicle thermal management system includes the heat exchange unit according to any one of claims 4 to 8 above, The vehicle thermal management system includes a compressor, a condenser, and at least one evaporator, The coolant flow path flows through the first connection port, the second connection port, and the flow path portion communicating with the first connection port (51) and the second connection port (52) in the first heat exchange portion (10), The condenser is connected to the third connection port by a pipeline, or is connected to the third connection port by a pipeline and a liquid reservoir. The inlet of the compressor communicates with the fourth connection port (54). The inlet of the evaporator communicates with the fifth connection port (55), or the vehicle thermal management system further includes a second throttle element between the inlet of the evaporator and the fifth connection port (55). A vehicle thermal management system in which the outlet of the evaporator communicates with the sixth connection port (56).

12. The vehicle thermal management system includes a front evaporator and a rear evaporator. The heat exchange unit further includes a seventh connection port (57). The inlet of one of the front evaporator or the rear evaporator communicates with the fifth connection port (55), or the vehicle thermal management system has a second throttle element disposed between the inlet of one of the front evaporator or the rear evaporator and the fifth connection port (55). The inlet of the other evaporator communicates with the seventh connection port (57), or the vehicle thermal management system has a second throttle element disposed between the inlet of the other evaporator and the seventh connection port (57). The vehicle thermal management system according to claim 11, wherein the outlet of the front evaporator and / or the rear evaporator communicates with the sixth connection port (56).

13. The vehicle thermal management system includes a front evaporator and a rear evaporator. The heat exchange unit further includes a seventh connection port (57) and an eighth connection port (58). The inlet of one of the front evaporator or the rear evaporator communicates with the fifth connection port (55), or the vehicle thermal management system has a second throttle element disposed between the inlet of one of the front evaporator or the rear evaporator and the fifth connection port (55). The inlet of the other evaporator communicates with the seventh connection port (57), or the vehicle thermal management system has a second throttle element disposed between the inlet of the other evaporator and the seventh connection port (57). The outlet of one of the front evaporator or the rear evaporator communicates with the sixth connection port (56). The vehicle thermal management system according to claim 11, wherein the outlet of the other evaporator communicates with the eighth connection port (58).

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