A throttling heat exchange component

Abstract

The present invention discloses a throttling heat exchange component, which includes a first heat exchange part, a bridge, a second heat exchange part, a throttling element, and a sensing element. The bridge is at least partially located between the first heat exchange part and the second heat exchange part. The bridge includes two holes and or grooves facing the first heat exchange part for communication. The bridge includes at least two holes or grooves that can be communicated with the second heat exchange part. The bridge is also provided with a mounting part. The sensing element is cooperatively mounted on the mounting part. The sensing head of the sensing element is located in the internal space of the bridge. The space where the sensing head is located is a flow channel or part of the flow channel from a channel of the first heat exchange part to the channel of the second heat exchange part. In this way, the sensing element can conveniently sense or detect the parameters of the fluid flowing through, such as a refrigerant, and the fluid communication between the two heat exchange parts can be relatively conveniently achieved through the bridge. Different system requirements can be achieved by changing the structure of the bridge, making the system pipeline simple, reducing the setting of pipelines between interfaces, and simple and convenient system connection.

Description

Technical Field

[0001] The invention relates to the field of fluid control, and in particular to a throttling heat exchange component. Background Art

[0002] Some thermal management systems include no less than two heat exchangers, such as a plate evaporator, and also include throttling elements. These components are connected and fixed to other components of the system through pipes. Due to the large number of components in the system, the piping connection of the system is also relatively complex. Summary of the Invention

[0003] In order to provide a throttling heat exchange component that is relatively simple to connect when connecting a system, the present invention provides the following technical solutions:

[0004] A throttling heat exchange assembly, comprising a first heat exchange portion, a bridge, a second heat exchange portion, and a throttling element, wherein the bridge is at least partially located between the first heat exchange portion and the second heat exchange portion, and the first heat exchange portion, the bridge, and the second heat exchange portion are fixed by welding; the first heat exchange portion has a heat exchange core, and the first heat exchange portion includes at least two fluid flow channels, which are not connected to each other; the throttling element is fixedly arranged or positionally limited with respect to the first heat exchange portion, or the throttling element is fixedly arranged or positionally limited with respect to the bridge;

[0005] The throttling heat exchange component includes a first interface, a second interface, and a third interface; the first heat exchange part includes a first interface part and a second interface part; the first interface part has the first interface, and the second interface part has the second interface; the bridge includes two holes or grooves for communication facing or close to the first heat exchange part; the bridge includes at least two holes and / or grooves that can be communicated with the second heat exchange part, and the mouths of the holes and / or grooves of the bridge that can be communicated with the second heat exchange part face or close to the second heat exchange part; the bridge is also provided with a mounting part, the throttling heat exchange component includes a sensor element, the sensor element is mounted on the mounting part, the sensor head of the sensor element passes through the mounting part, the sensor head is located in a hole and / or groove of the bridge, the hole and / or groove where the sensor head is located is a flow channel or part of a flow channel from a channel of the first heat exchange part to a channel of the second heat exchange part, and the fluid of the first channel (303) of the first heat exchange part is a refrigerant.

[0006] The term "communication through a flow channel" in this article includes communication through a flow channel possessed by a single component, as well as communication through a flow channel formed by the combination of two or more components. Holes and / or slots used for communication include various situations: holes used for communication, slots used for communication, a combination of holes and slots, a combination of holes and holes, a combination of slots and slots, and more combinations. Holes and / or slots connected to the second heat exchange part may also be holes connected to the second heat exchange part, slots connected to the second heat exchange part, or a combination of holes and slots connected to the second heat exchange part. The same applies to holes and / or slots connected to the third interface. Communication also includes direct and indirect communication. The bridge includes two holes or slots for communication facing or near the first heat exchange part. The bridge includes at least two holes and / or slots that can communicate with the second heat exchange part. Holes or slots used for communication facing or near the first heat exchange part do not exclude the possibility of being used for communication with the second heat exchange part. If they are through holes, they can face both the first heat exchange part and the second heat exchange part and communicate with the second heat exchange part. In this article, the two are connected by a pipeline or something, which does not mean a closed description. It means that the two are connected, and it also includes the possibility that there are other components between the two, such as throttling elements, separators, control valves, one-way valves, heat exchangers, etc.

[0007] The setting of the bridge can relatively easily realize the fluid communication between the two heat exchange parts. Different system requirements can be achieved by changing the structure of the bridge, making the system pipelines simple, reducing the setting of pipelines between interfaces, and the system connection is simple and convenient. By setting a first mounting part on the bridge to install the sensor element, and locating the sensor head in the flow channel from the first heat exchange part to the second heat exchange part, the sensor element can conveniently sense or detect the relevant parameters of the fluid flowing through, such as the refrigerant. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 and Figure 2 Schematic diagrams of the first embodiment of the throttling heat exchange assembly provided by the present invention in two directions;

[0009] Figure 3 for Figure 1 A schematic diagram of the main viewing direction of the throttling heat exchange component shown;

[0010] Figure 4 for Figure 3 A schematic diagram of a cross-section of the component shown in the AA direction;

[0011] Figure 5 This is an exploded diagram of the component;

[0012] Figure 6 is a three-dimensional schematic diagram of the bridge of the component;

[0013] Figure 7 for Figure 6 The bridge is shown in its main view and in cross-section along the BB and CC directions;

[0014] Figure 8 、 Figure 9 It is a three-dimensional schematic diagram of the connecting parts of the component in two directions;

[0015] Figure 10 、 Figure 11 A perspective schematic diagram of another embodiment of the bridge of the above assembly;

[0016] Figure 12 and Figure 13 It is a three-dimensional schematic diagram of the second embodiment of the throttling heat exchange component from two directions;

[0017] Figure 14 for Figure 12 An exploded schematic diagram of the throttling heat exchange component shown;

[0018] Figure 15 for Figure 12 Schematic diagrams of the bridge of the throttling heat exchange component in two directions;

[0019] Figure 16 for Figure 15 a schematic diagram of the main view of the bridge shown;

[0020] Figure 17 for Figure 12 An exploded schematic diagram of the connector of the throttling heat exchange assembly shown;

[0021] Figure 18 and Figure 19 Schematic diagrams of the third embodiment of the throttling heat exchange assembly in two directions;

[0022] Figure 20 for Figure 18 、 Figure 19 A schematic diagram of the bridge of the throttling heat exchange component shown;

[0023] Figure 21 for Figure 18 、 Figure 19 An exploded schematic diagram of the throttling heat exchange component shown;

[0024] Figure 22 for Figure 18 、 Figure 19 A three-dimensional schematic diagram of the connecting parts of the throttling heat exchange component shown;

[0025] Figure 23 、 Figure 24 for Figure 22 Schematic diagram of the connecting block of the connecting piece in the forward and reverse directions;

[0026] Figure 25 is a perspective schematic diagram of a fourth embodiment of a throttling heat exchange component;

[0027] Figure 26 for Figure 25 An exploded schematic diagram of the throttling heat exchange component shown;

[0028] Figure 27 for Figure 25 A three-dimensional schematic diagram of the bridge of the throttling heat exchange component shown;

[0029] Figure 28 for Figure 27 The bridge is shown in its main view and schematic cross-sections in the EE and DD directions;

[0030] Figure 29 is a perspective schematic diagram of a fifth embodiment of a throttling heat exchange component;

[0031] Figure 30 for Figure 29 An exploded schematic diagram of the throttling heat exchange component shown;

[0032] Figure 31 for Figure 29 A schematic diagram of the bridge of the throttling heat exchange component shown;

[0033] Figure 32 for Figure 31 A schematic diagram of the bridge in another direction and a schematic diagram of the cross-section in the GG direction and the FF direction;

[0034] Figure 33 is a perspective schematic diagram of a sixth embodiment of a throttling heat exchange component;

[0035] Figure 34 for Figure 33 An exploded schematic diagram of the throttling heat exchange component shown;

[0036] Figure 35 for Figure 33 Schematic diagrams of the bridge of the throttling heat exchange component in two directions;

[0037] Figure 36 for Figure 35 Schematic diagrams of the bridge shown in front and rear views;

[0038] Figure 37 for Figure 33 A three-dimensional schematic diagram of the connecting parts of the throttling heat exchange component in two directions;

[0039] In the figure: 10 first heat exchange part, 100 matching part, 101 first interface part, 102 second interface part, 103 first channel, 104, 104' second channel, 105, 105' communication port, 110 throttling element,

[0040] 20 bridge, first matching portion of 200 bridge, second matching portion of 200' bridge, 202, 202' guide hole, 203, 203' first groove, 2031 notch, 2032 hole, 204, 204' conducting portion, 2041 hole, 2042 groove, 2045 first wall, 2046 second wall, 205 second groove, 206, 206' through hole, 207 first mounting portion, 2080 groove, 2081, 2081' hole, 2082 oblique hole, 2084 hole, 209 first Second mounting portion, 211 third interface portion, 212, 213 shoulders, 215 first wall portion, 216 second wall portion, 217 convex portion, 2171 first side surface, 2172 second side surface, 218 second convex portion, 221 fixing hole, 222 groove, 223, 224 through holes, 250 sensing element, 2501 sensing head, 262 first hole, 263 third groove, 264 guide groove, 2640 transition portion, 2641 first portion, 2642 second portion, 265 fourth groove, 266 second hole,

[0041] 30 second heat exchange part, 300, 300' matching part, 301 third channel, 302 fourth channel, 303 first channel, 304 second channel,

[0042] 40 Connecting member, 4010 main body, 4011 extension, 405 groove, 409 fixing hole, 411 connecting block, 4111, 4112, 4113 through holes, 412 connecting plate, 4121, 4122, 4123, 4124, 4125 through holes, 4131 first connecting pipe matching portion, 4132 second connecting pipe matching portion, 4133 third connecting pipe matching portion, 421 connecting block, 4211, 4212 grooves, 4213, 4214, 4215, 4216 interface portions, 4217, 4218 holes, 423 interface matching member, 441 connecting portion one, 442 connecting portion two, 450 fixing member; 45, connecting member, 4510 main body, 4511 extension, 455 groove;

[0043] 51 first interface, 52 second interface, 53 third interface, 54 fourth interface, 55 fifth interface, 56 sixth interface, 57 seventh interface, 58 eighth interface. DETAILED DESCRIPTION

[0044] The technical solution is described below in conjunction with specific implementation methods. Figures 1-9 As shown, Figure 1 and Figure 2 Schematic diagram of the three-dimensional view of the first embodiment of the throttling heat exchange component provided by the present invention from two directions. Figure 3 This is a schematic diagram of the main viewing direction of the throttling heat exchange component. Figure 4 for Figure 3 A schematic diagram of the AA section of the component shown, Figure 5This is the exploded diagram of the component. Figure 6 is a three-dimensional schematic diagram of the bridge of this component, Figure 7 for Figure 6 The main view of the bridge and the schematic diagram of the BB and CC directions are shown. Figure 8 、 Figure 9 The figure shows a three-dimensional schematic diagram of the connector of the assembly from two directions. As shown in the figure, the throttling heat exchange assembly includes a first heat exchange section 10, a throttling element 110, a bridge 20, a second heat exchange section 30, and a connector 40. The bridge 20 is located between the first heat exchange section 10 and the second heat exchange section 30, and the connector 40 is located on the other side of the second heat exchange section 30. That is, the bridge 20 and the connector 40 are respectively arranged on either side of the second heat exchange section. The first heat exchange section 10, the bridge 20, and the second heat exchange section 30 are fixed together by welding, or the first heat exchange section 10, the bridge 20, the second heat exchange section 30, and the connector are fixed together by welding.

[0045] The first heat exchange part 10 has a heat exchange core. The first heat exchange part 10 has two flow channels for fluid to flow through for heat exchange. The two fluid flow channels are separated. The first heat exchange part 10 includes interlayer flow channels separated by stacked plates. The first heat exchange part 10 can flow through at least two fluids. The two fluids can exchange heat in the first heat exchange part. For example, one fluid is a refrigerant and the other can be a coolant, such as used to cool heating elements such as batteries; it can also be used for three fluids, such as one fluid is a refrigerant and the other two can be coolants. The two coolants can be controlled to exchange heat with the refrigerant, and then the coolant can be used to cool the components that need to be cooled after heat exchange and cooling. The following is an example of two fluids.

[0046] The throttling heat exchange assembly has a first interface 51, a second interface 52, a third interface 53, a fourth interface 54, a fifth interface 55, a sixth interface 56, and a seventh interface 57. In this embodiment, the first heat exchange portion is provided with the first interface 51 and the second interface 52, the bridge 20 is provided with the third interface 53, and the connector 40 is provided with the fourth interface 54, the fifth interface 55, the sixth interface 56, and the seventh interface 57. The throttling element 110 is fixedly arranged or positionally fixed with the first heat exchange portion 10, wherein the first heat exchange portion 10 has four channels, such as the first channel 103 and the second channel 104 (not all of which are shown in the figure). The first heat exchange portion is also provided with a pipe having a connecting port 105 in the channel 104, and the connecting port 105 is connected to the throttling element 110. The first heat exchange part 10 includes a first interface part 101 and a second interface part 102. The first interface part 101 has a first interface 51 for communicating with the coolant, and the second interface part 102 has a second interface 52 for communicating with the coolant. The first interface 51 and the second interface 52 are connected through the flow channel of the heat exchange core. The first interface part 101 and the second interface part 102 can be part of the side plate of the first heat exchange part, or they can be separately processed and fixed to the side plate and / or heat exchange core of the first heat exchange part by welding. The first interface part and the second interface part can also be fixed to the first heat exchange part in the form of pipe connectors.

[0047] The bridge 20 has a first matching portion 200 and a second matching portion 200'. Correspondingly, the first heat exchange portion 10 has a matching portion 100, which matches the first matching portion 200 of the bridge. The second heat exchange portion 30 has a matching portion 300, which matches the second matching portion 200' of the bridge. The matching portion 100 of the first heat exchange portion 10, the matching portion 300 of the second heat exchange portion 30 and the two matching portions of the bridge all include a flat portion, and the holes, grooves or openings of the conducting portion provided on the side of the first matching portion 200 for communication of the bridge are all flat. The first heat exchange part is located inside the first matching part and each of the ports for communication is surrounded by the first matching part on all sides, and the first heat exchange part has a corresponding communication port at a position corresponding to the position of each port for communication of the bridge, and each communication port of the first heat exchange part is located inside its matching part and each of the ports for communication is surrounded by the matching part; in this way, after the matching part 100 of the first heat exchange part 10 and the first matching part 200 of the bridge are welded and sealed, the port for communication of the bridge can be communicated with the corresponding port for communication of the first heat exchange part, or The surrounding of each opening for communication includes a part of the matching portion, and the two form a roughly closed structure at the matching portions arranged opposite to each other; the matching portion 300 of the second heat exchange portion 30 corresponds to the position of the second matching portion 200' of the bridge. After the two are welded and sealed, the opening for communication on this side of the bridge is connected to the opening for communication of the second heat exchange portion. Specifically, the second heat exchange portion 30 has three openings of the channel on the side opposite to the bridge 20: the opening of the third channel 301, the fourth channel 302, and the opening of the first channel 303. The bridge 20 is connected to the second The opposite side of the heat exchange part 30, i.e., the second matching part, has the mouth of the guide hole 202, the mouth of the first groove 203 and the mouth of the hole 2041 of the conductive part 204. The mouth of the third channel 301 of the second heat exchange part corresponds to the position of the mouth of the guide hole 202, the mouth of the fourth channel 302 corresponds to the position of the mouth of the first groove 203, the mouth of the first channel 303 corresponds to the position of the mouth of the hole 2041 of the conductive part 204, the mouth of the hole 2041 is roughly extended up and down, and the mouth of the first groove 203 is roughly extended up and down.

[0048] The terms "up" and "down" in this document are for clarity and should not be construed as limiting. They correspond to the height direction. Holes herein include, but are not limited to, through holes and blind holes. Holes can be circular or non-circular. Slots generally refer to non-through holes, but also include most non-through holes that partially penetrate.

[0049] The bridge 20 also includes a third interface portion 211, which has a third interface 53. The third interface portion 211 includes a structure protruding outward. The third interface portion 211 can be a structure that is integral with the main body of the bridge, or a structure that is separately processed and fixed to the main body of the bridge by welding. In addition, the bridge 20 is provided with a through hole 206. The first groove 203 is a structure similar to a blind hole and extends up and down. The through hole 206 is provided on the side of the first groove 203 that is relatively close to the third interface portion. The bridge is provided with a second groove 205 on the side where the first matching portion is located. The second groove 205 is a structure similar to a blind hole and extends up and down. The through hole 206 is located on the side of the second groove 205 that is relatively far away from the third interface portion. The first groove 203 and the second groove 205 are connected through the through hole 206, or in other words, one end of the first groove 203 extending is the through hole 206 or a part of the through hole 206, and one end of the second groove 205 extending is the through hole 206 or a part of the through hole 206. Figure 7 The guide hole 202 is similar to a blind hole, the mouth of the guide hole 202 is on the side of the second matching portion, the guide hole 202 is connected to the third interface 53, the depth of the guide hole is greater than or equal to half the thickness of the bridge, or the depth of the guide hole is close to half the thickness of the bridge, such as greater than or equal to one-third of the thickness of the bridge and less than two-thirds of the thickness of the bridge; the conductive 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 set on the side where the first matching portion is located. In this article, the side of the bridge facing the first heat exchange part is defined as the front side, and the side of the bridge facing the second heat exchange part is defined as the back side. In this example, the side of the bridge where the first groove 203 is set is defined as the back side, and the side where the second groove 205 is set is defined as the front side. The projection of the first groove 203 to the front side is at least partially located in the groove 2042 of the conductive part, and the projection of the guide hole 202 to the front side is at least partially located in the second groove 205, that is, the guide hole 202 and the second groove 205 are at least partially opposite to each other and not directly connected, and the first groove 203 and the groove 2042 are at least partially opposite to each other and not directly connected.

[0050] The connector 40 includes a main body 4010 and an extension 4011. The connector 40 is provided with a fourth interface 54, a fifth interface 55, a sixth interface 56, and a seventh interface 57. Furthermore, a fixing hole 409 is provided for cooperating with fixation or limiting. The connector 40 has a groove 405 on the side facing the second heat exchange portion 30. The groove 405 is similar to a blind hole structure. The seventh interface 57 is provided in the groove 405 relatively close to the fourth interface 54. The fifth interface 55 is provided approximately in the middle of the groove 405. The fifth interface 55 is connected to the groove 405, and the seventh interface 57 is connected to the groove 405. The connector may also include a fixing member 450 for fixing or limiting. The fixing member 450 can be fixed or limited in position in the fixing hole 409.

[0051] The throttling heat exchange component can make the thermal management system easy to install and connect, reduce the number of connected pipes, and reduce the size of the system. Taking the throttling heat exchange component used in a vehicle thermal management system as an example, it should be noted that these components are fixed in actual use. For the sake of clarity, the flow of the refrigerant is shown in the exploded view. This is just for the sake of clarity. In a specific vehicle thermal management system, the vehicle thermal management system includes a refrigerant system and a battery thermal management system. Figure 5In other views, the battery thermal management system includes a first interface portion 101 and a second interface portion 102 of a throttling heat exchange component, and a flow channel portion in the first heat exchange portion that is connected to the first interface and the second interface. The heat of the battery can be transferred to the coolant, which flows through the flow channel of the first heat exchange portion through the first interface 51 or the second interface 52, and exchanges heat with the refrigerant in the other flow channel in the first heat exchange portion. After cooling, the coolant returns to cool the battery. The third interface 53, the fourth interface 54, the fifth interface 55, the sixth interface 56, and the seventh interface 57 are respectively used to connect with the refrigerant system. For example, the refrigerant cooled by the condenser enters the throttling heat exchange component through the third interface 53, or the refrigerant through the liquid storage device enters the throttling heat exchange component through the third interface 53. In this way, the high-temperature and high-pressure refrigerant passes through the guide hole 202 to the third channel 301 of the second heat exchange portion, and exchanges heat with the refrigerant in the other flow channel in the second heat exchange portion 30 to the fourth channel 302. The refrigerant to the fourth channel 302 is divided into two parts: one Part of the refrigerant flows out through the flow channel formed by the space where the groove 405 is located, formed by the cooperation between the connecting piece 40 and the second heat exchange part, through the fifth interface 55 and the seventh interface 57, such as leading to the front evaporator through the fifth interface 55 and leading to the rear evaporator through the seventh interface 57, or leading to the rear evaporator through the fifth interface 55 and leading to the front evaporator through the seventh interface 57. A throttling element can also be set in front of the front evaporator or the rear evaporator; the other part of the refrigerant flows through the flow channel formed by the space where the first groove 203 is located, through the through hole 206, through the matching part of the bridge and the second heat exchange part, and flows out through the fifth interface 55 and the seventh interface 57. The bridge and the first heat exchange part cooperate with the flow channel formed by the space where the second groove 205 is located, and the connecting port connected to the throttling element enters the throttling element 110, and enters the channel of the first heat exchange part 10 after throttling by the throttling element 110, and exchanges heat with the coolant in the coolant channel of the first heat exchange part, reaches the first channel 103, and passes through the flow channel formed by the conducting part 204 that cooperates with the bridge, the first heat exchange part, and the second heat exchange part, to the first channel 303 of the second heat exchange part, and passes through the fourth channel connected to the first channel 303. The interface flows out, such as returning to the compressor; in addition, the sixth interface 56 can be used to connect the refrigerant flowing back from the front evaporator and / or the rear evaporator. This part of the low-temperature refrigerant flows to the first channel 303 through the second channel 304 of the second heat exchange part, and performs heat exchange with the high-temperature refrigerant flowing from the third channel 301 to the fourth channel 302. In the first channel 303, the two parts of the refrigerant converge and can flow back to the compressor through the fourth interface. In this way, part of the low-temperature refrigerant is used to cool the high-temperature refrigerant, which can reduce the condensation temperature of the refrigerant without making the temperature of the refrigerant returning to the compressor higher. The flow direction in this article is for illustration only and cannot be used as a limitation, nor is it a requirement for closure. Other components can be added thereto, such as adding other control valves in front of the compressor.The bridge 20 is also provided with a first mounting portion 207 for mounting a sensor element 250, such as a temperature sensor, so that the temperature sensing head 2501 passes through the mounting portion and is located in the flow channel where the conducting portion 204 is located, so that the temperature of the refrigerant after passing through the first heat exchange portion or the outlet temperature of the evaporator can be obtained.

[0052] The throttling heat exchange component can realize the heat exchange between high temperature refrigerant and part of low temperature refrigerant, reduce the temperature of high temperature refrigerant, and will not make the temperature of refrigerant returning to the compressor too high, thereby improving efficiency. In addition, the setting of pipelines between interfaces can be reduced, and the system connection is simple and convenient. In addition, in order to further reduce the weight, the bridge can also be Figure 10 、 Figure 11 As shown, the bridge is an improvement of the above embodiment. A piece is removed from the middle of the bridge to form a hole 2032. The shape of the hole 2032 can be non-standard and can be removed according to the needs of welding. The hole 2032 is a through hole. The distance between the hole 2032 and the second groove 205 of the bridge for communication toward the first heat exchange part is greater than or equal to 1.5 mm, and the distance between the hole 2032 and the conductive part 204 of the bridge for communication toward the first heat exchange part is greater than or equal to 1.5 mm; the distance between the hole 2032 and the hole 202' of the bridge for communication toward the second heat exchange part is greater than or equal to 1.5 mm. The hole 202' is a guide hole. The distance between the hole 2032 and the first groove 203 of the bridge for communication toward the second heat exchange part is greater than or equal to 1.5 mm, and the distance between the hole 2032 and the hole 2041 of the bridge for communication toward the second heat exchange part is greater than or equal to 1.5 mm, or in other words, this distance is the distance between the matching parts of the bridge for welding with the first heat exchange part and the second heat exchange part respectively. However, the holes do not necessarily need to be through-holes. For example, if both sides of the bridge are concave inward and formed with blind holes or grooves, both sides can reduce weight and facilitate welding. However, through-holes are more suitable for processing. In addition, a recessed portion, i.e., notch 2031, is removed on one side. This reduces the area of the first mating portion of the bridge for mating with the first heat exchange portion, and similarly reduces the area of the second mating portion for mating with the second heat exchange portion. This reduces the area for mating welding, which helps improve welding quality and also reduces weight. At the intersection of hole 2041 and groove 2042, the bridge has a first wall portion 215 and a second wall portion 216. The surface of the first wall portion 215 facing the conducting portion forms a smooth transition first wall surface 2045, and the surface of the second wall portion 216 facing the conducting portion forms a smooth transition second wall surface 2046. In this way, the flow channel formed by the conducting portion 204' through the bridge, the first heat exchange portion, and the second heat exchange portion reduces the flow resistance of the refrigerant when turning due to the provision of the smooth transition portion. The non-circular guide hole 202' is slightly extended laterally, which makes the flow more convenient.

[0053] The second embodiment of the throttling heat exchange component is described below. Figure 12-17 , Figure 12 and Figure 13 It is a three-dimensional schematic diagram of the throttling heat exchange component in two directions. Figure 14 Explosion diagram of the throttling heat exchange component, Figure 15 A three-dimensional schematic diagram of the bridge of the throttling heat exchange component in two directions, Figure 16 for Figure 15 The main view of the bridge is shown. Figure 17 for Figure 12 An exploded schematic diagram of the connectors of a throttling heat exchange assembly is shown. The throttling heat exchange assembly includes a first heat exchange portion 10, a bridge 20, a second heat exchange portion 30, and connectors. The throttling heat exchange assembly has a first interface 51, a second interface 52, a third interface 53, a fourth interface 54, a fifth interface 55, a sixth interface 56, a seventh interface 57, and an eighth interface 58. The bridge 20 is provided with a third interface portion 211. The throttling element 110 is fixedly arranged or limitedly arranged with the first heat exchange part 10, wherein the first heat exchange part 10 has four channels such as the first channel 103 and the second channel 104 (not all of which are shown in the figure), and the first heat exchange part 10 includes a first interface part 101 and a second interface part 102. The first interface part 101 has a first interface 51 for communicating with the coolant, and the second interface part 102 has a second interface 52 for communicating with the coolant. The first interface 51 and the second interface 52 are connected through the flow channel of the heat exchange core. The first interface part 101 and the second interface part 102 can be part of the side plate of the first heat exchange part, or they can be separately processed and fixed to the side plate and / or heat exchange core of the first heat exchange part by welding.

[0054] The bridge 20 has a first matching portion 200, and the first heat exchange portion 10 has a matching portion 100 that matches with the first matching portion 200 of the bridge. The first matching portion 200 is opposite to and matches with the matching portion of the first heat exchange portion. The matching portion 100 of the first heat exchange portion 10 and the first matching portion 200 of the bridge both include a planar portion. The hole or groove or the mouth of the conducting portion for communication provided on the side of the first matching portion 200 of the bridge is located inside the first matching portion, and each of the openings for communication is surrounded by the first matching portion. The first heat exchange portion has a corresponding communicating opening at a position corresponding to the position of each communicating opening of the bridge, and each communicating opening is located inside its matching portion, and each of the communicating openings is surrounded by the matching portion. In other words, both include a substantially closed structure at the matching portions arranged opposite to each other. Structure; in this way, after the matching part 100 of the first heat exchange part 10 and the first matching part 200 of the bridge are welded and sealed, the mouth of the bridge for communication is communicated with the corresponding mouth of the first heat exchange part for communication. Specifically, the first heat exchange part 10 has the mouth of the first channel 103 and the communication port 105 of the pipe connected to the throttling element on the side opposite to the bridge 20, the first heat exchange part 10 has the mouth of the first channel 103 and the communication port 105 connected to the throttling element on the side opposite to the bridge 20, and the bridge 20 has corresponding holes 223 and holes 224 on the side opposite to the first heat exchange part 10, the mouth of the hole 223 corresponds to the position of the mouth of the channel 103 of the first heat exchange part, and the mouth of the hole 224 corresponds to the communication port 105 connected to the throttling element; the holes 223 and the holes 224 are through holes.

[0055] The bridge 20 has a second matching portion 200', which faces the second heat exchange portion. The second heat exchange portion 30 has a matching portion 300. The matching portion 300 of the second heat exchange portion 30 and the second matching portion 200' of the bridge both include a planar portion. The hole, groove, or opening of the conducting portion for communication provided on the side of the second matching portion of the bridge is located inside the second matching portion, and each opening for communication is surrounded by the second matching portion. The second heat exchange portion has a corresponding communicating opening at a position corresponding to the position of each opening for communication of the bridge, and each communicating opening is located inside its matching portion, and each opening for communication is surrounded by the matching portion; or in other words, each opening for communication is surrounded by a portion of the matching portion, and the two form a substantially flat surface at the matching portions arranged opposite to each other. Closed structure; the matching part 300 of the second heat exchange part 30 corresponds to the position of the second matching part 200' of the bridge. After the two are welded and sealed, the mouth of the bridge on this side for communication can be connected with the mouth of the second heat exchange part for communication. Specifically, the second heat exchange part 30 has three channel mouths on the side opposite to the bridge 20: the third channel 301, the fourth channel 302, and the mouth of the first channel 303. The bridge 20 has the mouth of the guide hole 202, the mouth of the hole 223 and the mouth of the hole 224 on the side opposite to the second heat exchange part 30, that is, the second matching part. The mouth of the third channel 301 of the second heat exchange part corresponds to the position of the mouth of the guide hole 202, the mouth of the fourth channel 302 corresponds to the position of the mouth of the hole 224, and the mouth of the first channel 303 corresponds to the position of the mouth of the hole 223. The bridge 20 also includes a third interface portion 211, which has a third interface 53. This portion 211 comprises an outwardly protruding structure. The third interface portion 211 can be integral with the bridge body or separately machined and secured to the bridge body via welding. The bridge 20 is provided with four holes 2032, which can be non-circular through-holes or circular. The diversion holes 202 are similar to blind holes, with their openings located on the side of the second mating portion. The diversion holes 202 communicate with the third interface 53. The bridge also includes a protrusion 217 and a second protrusion 218. The protrusion 217 protrudes generally laterally along the main body, while the second protrusion 218 protrudes outward from a corner of the main body. The first side 2171 of the protrusion 217 is lower than the second mating portion 200' of the bridge, while the second side 2172 of the protrusion 217 is lower than the first mating portion 200 of the bridge. Similarly, both side surfaces of the second protrusion are lower than the mating portions on either side of the bridge. In other words, the thickness of the protrusion 217 is less than that of the main body of the bridge, while the thickness of the second protrusion 218 is less than that of the main body of the bridge. The provision of the protrusion and the second protrusion can reduce the main body of the bridge, allowing at least a portion of the fixing hole 221 to be located in the protrusion 217 and / or the second protrusion 218, and allowing at least a portion of the third interface portion 211 to be located in the second protrusion, thereby reducing the main body of the bridge.

[0056] The connector includes a connecting block 411, a connecting plate 412, a first connecting pipe fitting portion 4131, a second connecting pipe fitting portion 4132, and a third connecting pipe fitting portion 4133. The connecting block 411, the connecting plate 412, the first connecting pipe fitting portion 4131, the second connecting pipe fitting portion 4132, and the third connecting pipe fitting portion 4133 can be fixed by welding. The thickness of the connecting block 411 is greater than that of the connecting plate 412. The first connecting pipe fitting portion 4131 is provided with a fourth interface 54, the second connecting pipe fitting portion 4132 is provided with a seventh interface 57 and an eighth interface 58, and the third connecting pipe fitting portion 4133 is provided with a fifth interface 55 and a sixth interface 56. The three connecting pipe fitting portions of the connector are also provided with fixing holes 409 for fixing or limiting with the fixing member 450. The connecting plate 412 is located between the connecting block 411 and the three connecting pipe fitting portions. The connecting block is relatively close to the second heat exchange portion, or in other words, the connecting block is close to the second heat exchange portion and fixed by welding. The connecting block 411 has three through holes: through hole 4111, through hole 4112, and through hole 4113. Through hole 4111 and through hole 4112 are non-circular and can be arranged at an angle or in an arc shape. There is no requirement for the shape as long as the positions of their two ends can conduct the corresponding flow channels. Through hole 4113 is circular; one side of through hole 4111 and through hole 4112 and through hole 4113 are located on the side of the connecting block relatively close to the length direction. The connecting plate has five through holes: 4121, 4122, 4123, 4124, and 4125. The positions of through holes 4121 and 4125 correspond to through hole 4111, that is, through holes 4121 and 4125 can be connected to through hole 4111; the positions of through holes 4122 and 4124 correspond to through hole 4112, that is, through holes 4122 and 4124 can be connected to through hole 4112, and the position of through hole 4123 corresponds to through hole 4113; the position of the fourth interface 54 corresponds to through hole 4121, and the fourth interface can be connected to through hole 4121, that is, to the through hole of the connecting block. The eighth interface 58 is positioned corresponding to through-hole 4125 and can be connected to through-hole 4125, that is, to through-hole 4111 of the connection block; the seventh interface 57 is positioned corresponding to through-hole 4124 and can be connected to through-hole 4124, that is, to through-hole 4112 of the connection block; the fifth interface 55 is positioned corresponding to through-hole 4122 and can be connected to through-hole 4122, that is, to through-hole 4112 of the connection block; the sixth interface 56 is positioned corresponding to through-hole 4123 and can be connected to through-hole 4123, that is, to through-hole 4113 of the connection block. In this embodiment, the connector can be formed by processing and assembling profiles or stamping parts, which can reduce the number of machining steps.

[0057] The throttling heat exchange component can facilitate the installation and connection of the thermal management system, reduce the number of connecting pipes and connection interfaces, and reduce the volume of the system. Taking the throttling heat exchange component used in a vehicle thermal management system as an example, it should be noted that these components are fixed in actual use. For the sake of clarity, the flow of the refrigerant is shown in the exploded view. This is only for the purpose of clarity. Figure 14Taking a vehicle thermal management system as an example, the vehicle thermal management system includes a refrigerant system and a battery thermal management system. The battery thermal management system includes a first interface portion 101 and a second interface portion 102 of a throttling heat exchange component, and a flow channel portion connecting the first heat exchange portion with the first interface and the second interface. Heat from the battery is transferred to the coolant, which flows through the first interface 51 or the second interface 52 through the flow channel of the first heat exchange portion. Heat is exchanged with the refrigerant in the other flow channel in the first heat exchange portion. After cooling, the coolant returns to cool the battery. The third interface 53, the fourth interface 54, the fifth interface 55, the sixth interface 56, the seventh interface 57, and the eighth interface 58 are respectively used to communicate with the refrigerant system. For example, the refrigerant cooled by the condenser enters the throttling heat exchange component through the third interface 53, or the refrigerant through the liquid reservoir enters the throttling heat exchange component through the third interface 53. In this way, the high-temperature and high-pressure refrigerant passes through the guide hole 202 to the third channel 301 of the second heat exchange part, and then exchanges heat with the refrigerant of another channel in the second heat exchange part 30 to the fourth channel 302. The refrigerant to the fourth channel 302 is divided into two parts: one part is formed by the connector and the second heat exchange part. The flow channel is such as the through hole 4112 of the connecting block 411 and the through hole 4124 of the connecting plate to the seventh interface 57, and the through hole 4112 of the connecting block 411 of the connecting piece and the through hole 4122 of the connecting plate to the fifth interface 55, and flows out through the fifth interface 55 and the seventh interface 57, such as leading to the front evaporator through the fifth interface 55 and leading to the rear evaporator through the seventh interface 57, or leading to the rear evaporator through the fifth interface 55 and leading to the front evaporator through the seventh interface 57. A throttling element can also be set in front of the front evaporator or the rear evaporator; another part of the refrigerant passes through the through hole 224 of the bridge and through the pipe connected to the throttling element 110. The connecting port 105 enters the throttling element 110, and there is no communication between the bridge and the second channel 104. After throttling by the throttling element 110, the liquid enters the second channel 104 of the first heat exchange part 10, and performs heat exchange between the refrigerant flow channel of the first heat exchange part and the coolant in the coolant flow channel, reaches the first channel 103, and passes through the through hole 223 of the bridge to the first channel 303 of the second heat exchange part, and flows out through the through hole 4111 of the connecting block 411 connected to the first channel 303, the through hole 4121 of the connecting plate, and the fourth interface 54, such as returning to the compressor; in addition, the sixth interface 56 can be used to connect the refrigerant from the front evaporator and / or the rear evaporator. The refrigerant flowing back from the evaporator, this part of the low-temperature refrigerant passes through the through hole 4123 of the connecting plate and the through hole 4113 of the connecting block to the second channel 304 of the second heat exchange part, and then flows to the first channel 303, and exchanges heat with the high-temperature refrigerant flowing from the third channel 301 to the fourth channel 302. In the first channel 303, the two parts of the refrigerant converge and can flow back to the compressor through the fourth interface; the eighth interface 58 can be used to connect the refrigerant flowing back from the rear evaporator and / or the front evaporator. This part of the low-temperature refrigerant passes through the through hole 4125 of the connecting plate and the through hole 4111 of the connecting block, merges with the rest of the refrigerant, and can return to the compressor through the fourth interface.The flow directions described herein are for illustrative purposes only and are not intended to be limiting or a requirement for closure. Other components, such as control valves before the compressor, may be added. Bridge 20 is provided with a first mounting portion 207 for mounting a sensing element 250, such as a temperature sensor. The hole in first mounting portion 207 communicates with through-hole 223, allowing a temperature sensing head 2501 to pass through the mounting portion and locate within the flow path where through-hole 223 is located. This allows the refrigerant temperature after passing through the first heat exchange section, or the evaporator outlet temperature, to be determined.

[0058] The third embodiment of the throttling heat exchange component is described below. Figures 18-24 , Figure 18 and Figure 19 It is a three-dimensional schematic diagram of the throttling heat exchange component in two directions. Figure 20 A schematic diagram of the bridge in this scheme is shown below. Figure 21 This is an exploded diagram of the throttling heat exchange component. Figure 22 This is a three-dimensional schematic diagram of the connecting parts of the throttling heat exchange component. Figure 23 、 Figure 24 for Figure 22 Schematic diagram of the connecting block of the connecting piece in the forward and reverse directions.

[0059] The throttling heat exchange assembly includes a first heat exchange part 10, a bridge 20, a second heat exchange part 30, and a connector. The throttling heat exchange assembly has a first interface 51, a second interface 52, a third interface 53, a fourth interface 54, a fifth interface 55, a sixth interface 56, a seventh interface 57, and an eighth interface 58. The throttling element 110 is fixedly arranged or limitedly arranged with the first heat exchange part 10, wherein the first heat exchange part 10 has four channels such as the first channel 103 and the second channel 104 (the other two are not shown in the figure), and the first heat exchange part 10 includes a first interface part 101 and a second interface part 102. The first interface part 101 has a first interface 51 for communicating with the coolant, and the second interface part 102 has a second interface 52 for communicating with the coolant. The first interface 51 and the second interface 52 are connected through the flow channel of the heat exchange core. The first interface part 101 and the second interface part 102 can be part of the side plate of the first heat exchange part, or they can be separately processed and fixed to the side plate and / or heat exchange core of the first heat exchange part by welding.

[0060] The bridge 20 has a first mating portion 200 and a second mating portion 200'. Accordingly, the first mating portion 200 is opposite to and mated with the mating portion 100 of the first heat exchange portion 10, and the second mating portion 200' is opposite to and mated with the mating portion 300 of the second heat exchange portion 30. The mating portion 100 of the first heat exchange portion 10, the mating portion 300 of the second heat exchange portion 30 and the two mating portions of the bridge all include planar portions. The bridge 20 includes a through hole 223 and a through hole 222, and the through hole 222 extends roughly horizontally; the bridge 20 also includes a first mounting portion 207, and the hole of the first mounting portion 207 is connected to the through hole 222, or in other words, the mounting portion is arranged on the side close to the through hole 222. The openings of the through holes 223 and 222 near the first heat exchange portion are located inside the first matching portion and are surrounded by the first matching portion, or in other words, the openings of the through holes 223 and 222 have plane portions for matching welding and sealing; on the other side, the openings of the through holes 223 and 222 are located inside the second matching portion and are surrounded by the second matching portion, or in other words, the openings of the through holes 223 and 222 have plane portions for matching welding and sealing; in this way, the matching portion 100 of the first heat exchange portion 10 and the first matching portion 20 of the bridge are connected. After the two are welded and sealed, the openings of the two through holes of the bridge are connected to the corresponding communication openings of the first heat exchange part. Specifically, the through hole 223 of the bridge corresponds to and is connected to the communication opening 105, the communication opening 105 is connected to the throttling element, and the through hole 222 corresponds to and is connected to the first channel 103 of the first heat exchange part 10; the openings of the two through holes of the bridge are connected to the corresponding communication openings of the second heat exchange part. The through hole 223 of the bridge corresponds to and is connected to the fourth channel 302 of the second heat exchange part, and the through hole 222 corresponds to and is connected to the first channel 303 of the second heat exchange part 30.

[0061] The bridge 20 also includes two holes 2032. The provision of holes 2032 reduces the weight of the bridge and reduces the planar surface area of the two mating portions of the bridge, thereby reducing the area of contact between the bridge and the first and second heat exchange portions. This reduces the contact welding range and improves the welding quality. In this solution, the bridge is relatively simple to manufacture. For example, it can be made of a profile with four corresponding through-holes. The bridge is manufactured by cutting, machining the mounting portion, and processing the two mating portions on either side, thus reducing the number of manufacturing steps.

[0062] The connector includes a connecting block 421 and an interface fitting 423. The connecting block 421 and the interface fitting 423 can be fixed by welding or sealed by a fixing member or a seal. The connecting member is provided with a third interface 53, a fourth interface 54, a fifth interface 55, a sixth interface 56, a seventh interface 57, and an eighth interface 58. The connecting block includes a third interface portion 4213, a fourth interface portion 4214, a fifth interface portion 4215, and a sixth interface portion 4216. The third interface portion 4213, the fourth interface portion 4214, the fifth interface portion 4215, and the sixth interface portion 4216 can be an integral structure of the plate portion of the connecting block, or can be a structure that is separately processed and fixed to the plate portion of the connecting block by welding. The connecting block is further provided with through-holes 4217 and 4218, as well as a fixing hole 429 for securing or limiting the connection. The connecting member has slots 4211 and 4212 on the side facing the second heat exchange section 30. The slots are similar to blind holes. The connecting block is provided with fourth interfaces 54 on opposite sides of slot 4211, respectively, connecting to through-hole 4218. The fourth interface 54 and through-hole 4218 are in communication with slot 4211. The connecting block is provided with fifth interfaces 55 on slot 4212, respectively, connecting to through-hole 4217. The fifth interface 55 and through-hole 4217 are in communication with slot 4212. The sixth interface 56 is in communication with the second channel 304 of the second heat exchange section 30. The fifth interface 55 is in communication with the fourth channel 302 of the second heat exchange section 30. The third interface 53 is in communication with the third channel 301 of the second heat exchange section 30. The fourth interface 54 is in communication with the first channel 303 of the second heat exchange section 30. The interface fitting 423 is provided with a seventh interface 57 and an eighth interface 58 . The seventh interface 57 corresponds to and is in communication with the through hole 4217 of the connection block, and the eighth interface 58 corresponds to and is in communication with the through hole 4218 of the connection block.

[0063] In order to indicate the flow mode of the refrigerant during use, Figure 21 The exploded diagram is shown for illustration only. This is only for illustrative purposes. In actual use, several components are fixed. In a specific vehicle thermal management system, the vehicle thermal management system includes a refrigerant system and a battery thermal management system. Figure 21As shown in other views, the battery thermal management system includes a first interface portion 101 and a second interface portion 102 of the throttling heat exchange component, and a flow channel portion in the first heat exchange portion that is connected to the first interface and the second interface. The heat of the battery can be transferred to the coolant, which flows through the first interface 51 or the second interface 52 through the flow channel of the first heat exchange portion, and exchanges heat with the refrigerant in the other flow channel in the first heat exchange portion. After cooling, the coolant returns to cool the battery. The third interface 53, the fourth interface 54, the fifth interface 55, the sixth interface 56, the seventh interface 57, and the eighth interface 58 are respectively used to communicate with the refrigerant system. For example, the refrigerant cooled by the condenser enters the throttling heat exchange component through the third interface 53, or the refrigerant passing through the liquid storage device enters the throttling heat exchange component through the third interface 53. In this way, the high-temperature and high-pressure refrigerant is connected to the third channel 301 of the second heat exchange part 30, and after exchanging heat with the refrigerant in another flow channel in the second heat exchange part 30, it enters the fourth channel 302. The refrigerant to the fourth channel 302 is divided into two parts: one part passes through the flow channel formed by the space where the groove 4212 is located, formed by the cooperation between the connector and the second heat exchange part, and flows out through the fifth interface 55 and the seventh interface 57, such as leading to the front evaporator through the fifth interface 55 and leading to the rear evaporator through the seventh interface 57, or leading to the rear evaporator through the fifth interface 55 and leading to the front evaporator through the seventh interface 57. A throttling element can also be set in front of the front evaporator or the rear evaporator; another A portion of the refrigerant enters the throttling element 110 through the hole 223 of the bridge connected to the fourth channel 302 of the second heat exchange part and the connecting port 105 connected to the throttling element. After throttling by the throttling element 110, it enters the second channel 104 of the first heat exchange part 10, and exchanges heat with the coolant in the coolant channel of the first heat exchange part, reaches the first channel 103, and passes through the channel formed by the through hole 222 of the bridge, the first heat exchange part, and the second heat exchange part, and reaches the second heat exchange part. The first channel 303 of the heat exchange section and flows out through the fourth interface connected to the first channel 303, such as returning to the compressor; in addition, the sixth interface 56 can be used to connect the refrigerant flowing back from the front evaporator or the rear evaporator. This part of the low-temperature refrigerant flows to the first channel 303 through the second channel 304 of the second heat exchange section, exchanges heat with the high-temperature refrigerant flowing from the third channel 301 to the fourth channel 302, and then merges with the remaining refrigerant in the first channel 303 and flows back to the compressor through the fourth interface. In addition, the eighth interface 58 can be used to connect the refrigerant flowing back from the rear evaporator or the front evaporator. This part of the low-temperature refrigerant flows to the fourth interface through the flow channel formed by the connector and the second heat exchange section and the groove 4211. After the three parts of refrigerant merge, they can flow back to the compressor through the fourth interface. The flow direction in this article is for illustration only and cannot be used as a limitation, nor is it a requirement for closure. Other components can be added therein, such as adding other control valves before the compressor.The bridge 20 is also provided with a first mounting portion 207 for mounting a sensor element 250, such as a temperature sensor, so that the temperature sensing head 2501 passes through the mounting portion and is located in the flow channel where the through hole 222 is located, so that the temperature of the refrigerant after passing through the first heat exchange portion or the outlet temperature of the evaporator can be obtained.

[0064] In this solution, several refrigerant connection ports are provided on the connector, which makes the connection more convenient during application and the pipelines are concentrated on the same side.

[0065] The throttling heat exchange component can also be Figure 25-28 As shown, Figure 25 is a three-dimensional schematic diagram of a fourth embodiment of a throttling heat exchange component, Figure 26 This is an exploded diagram of the throttling heat exchange component. Figure 27 A three-dimensional schematic diagram of the bridge of the throttling heat exchange component, Figure 28 for Figure 27 The main view of the bridge and the schematic diagram of the EE and DD directions are shown.

[0066] The throttling heat exchange assembly includes a first heat exchange section 10, a throttling element 110, a bridge 20, a second heat exchange section 30, and a connector. The bridge 20 is primarily located between the first and second heat exchange sections 10 and 30, with the connector 40 located on the other side of the second heat exchange section 30. In other words, the bridge 20 and connector 40 are located on either side of the second heat exchange section. The first heat exchange section 10, bridge 20, and second heat exchange section 30 are secured together by welding, or the first heat exchange section 10, bridge 20, second heat exchange section 30, and connector are secured together by welding. The first heat exchange section 10 is larger than the second heat exchange section 30.

[0067] The first heat exchange part 10 has a heat exchange core. The first heat exchange part 10 has two flow channels for fluid to flow through for heat exchange. The two fluid flow channels are separated. The first heat exchange part 10 includes interlayer flow channels separated by stacked plates. The first heat exchange part 10 can flow through at least two fluids. The two fluids can exchange heat in the first heat exchange part. For example, one fluid is a refrigerant and the other can be a coolant, such as used to cool heating elements such as batteries; it can also be used for three fluids, such as one fluid is a refrigerant and the other two can be coolants. The two coolants can be controlled to exchange heat with the refrigerant, and then the coolant can be used to cool the components that need to be cooled after heat exchange and cooling. The following is an example of two fluids.

[0068] The throttling heat exchange assembly has a first interface 51, a second interface 52, a third interface 53, a fourth interface 54, a fifth interface 55, and a sixth interface 56. The first heat exchange section is provided with a first interface portion 101 and a second interface portion 102, the bridge 20 is provided with a third interface portion 211, and the connector 40 is provided with a fourth interface portion 54, a fifth interface portion 55, and a sixth interface portion 56. The throttling element 110 is fixedly mounted or positionally fixed to the bridge 20. The first heat exchange section 10 has four channels, such as the first channel 103 and the second channel 104 (the other two are not shown). The first heat exchange part 10 includes a first interface part 101 and a second interface part 102. The first interface part 101 has a first interface 51 for communicating with the coolant, and the second interface part 102 has a second interface 52 for communicating with the coolant. The first interface 51 and the second interface 52 are connected through the flow channel of the heat exchange core. The first interface part 101 and the second interface part 102 can be part of the side plate of the first heat exchange part, or they can be separately processed and fixed to the side plate and / or the heat exchange core of the first heat exchange part by welding.

[0069] The bridge 20 has a first matching portion 200 and a second matching portion 200'. Correspondingly, the first heat exchange portion 10 has a matching portion 100, which matches the first matching portion 200 of the bridge. The second heat exchange portion 30 has a matching portion 300, which matches the second matching portion 200' of the bridge. The matching portion 100 of the first heat exchange portion 10, the matching portion 300 of the second heat exchange portion 30 and the two matching portions of the bridge all include a flat portion. The hole, groove or opening of the conducting portion for communication on the side of the first matching portion 200 of the bridge is located inside the first matching portion and each opening for communication is surrounded by The first matching part is surrounded by the first heat exchange part, and the first heat exchange part has a corresponding communicating mouth at a position corresponding to the position of each communicating mouth of the bridge, and each communicating mouth of the first heat exchange part is located inside its matching part and each communicating mouth is surrounded by the matching part; in this way, after the matching part 100 of the first heat exchange part 10 and the first matching part 200 of the bridge are welded and sealed, the communicating mouth of the bridge can be communicated with the corresponding communicating mouth of the first heat exchange part, or in other words, each communicating mouth is surrounded by a part of the matching part, and the two form a roughly closed structure at the relatively arranged matching parts. The first heat exchange section 10 has the mouth of the first channel 103 and the mouth of the second channel 104 on the side opposite the bridge 20. The bridge 20 also has corresponding holes 2084 and 2091 on the side opposite the first heat exchange section 10. The mouth of hole 2084 corresponds to the mouth of the first channel 103 of the first heat exchange section, and the mouth of hole 2091 corresponds to the mouth of the second channel 104 of the first heat exchange section. Furthermore, the bridge 20 has a groove 2080 on the side opposite the first heat exchange section 10. One side of the groove 2080 communicates with the hole 2081. On the other side of the groove, there is an inclined hole 2082. The other end of the inclined hole 2082 connects to the hole of the second mounting section 209. Thus, the hole of the second mounting section 209 communicates with the hole 2081 via the inclined hole 2082 and the groove 2080.

[0070] The matching part 300 of the second heat exchange part 30 corresponds to the position of the second matching part 200' of the bridge. After the two are welded and sealed, the mouth of the bridge on this side for communication is respectively connected with the mouth of the second heat exchange part for communication. Specifically, the second heat exchange part 30 has three channel mouths on the side opposite to the bridge 20: the third channel 301, the fourth channel 302, and the mouth of the first channel 303. The bridge 20 has the mouth of the guide hole 202, the mouth of the hole 2081 and the mouth of the hole 2084 on the side opposite to the second heat exchange part 30, that is, the second matching part. The mouth of the third channel 301 of the second heat exchange part corresponds to the position of the mouth of the guide 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.

[0071] The bridge 20 includes a third interface portion 211, a first mounting portion 207, and a second mounting portion 209. The third interface portion 211 has a third interface 53. The third interface portion 211 includes an outwardly protruding structure. The third interface portion 211 can be an integral structure of the bridge body, or a separately machined structure fixed to the bridge body by welding. The first mounting portion 207 is used to cooperate with the installation of the sensor element, and the second mounting portion 209 is used to cooperate with the installation of the throttling element. The hole in the first mounting portion 207 is connected to the hole 2084. The sensor head 2501 used by the temperature sensing element passes through the first mounting portion 207 and is located in the flow channel where the hole 2084 is located. In this way, the temperature of the refrigerant after passing through the first heat exchange portion or the outlet temperature of the evaporator can be obtained. In addition, the installation direction of the throttling element can also be other directions, such as extending the mounting portion from the side of the bridge to the inside of the bridge, and the axis of the throttling element is roughly parallel to the length direction of the bridge.

[0072] In addition, the bridge 20 is provided with three holes 2032 to reduce the weight of the bridge and to reduce the area of the flat portion for welding, thereby improving the welding quality. The bridge 20 is also provided with fixing holes 221 for fixing.

[0073] The connector includes a first connector 431 and a second connector 432. The first connector 431 includes a fourth interface 4, and the second connector 432 has a fifth interface 55 and a sixth interface 56. The first connector 431 has a space corresponding to and cooperating with the first channel 303 of the second heat exchange section 30 to achieve a flow path from the first channel 303 to the fourth interface. Specifically, it can be fixed in a manner as shown in the figure, or it can be fixed in a corresponding position around the first channel 303 in the manner of a joint. The fifth interface 55 of the second connector 432 corresponds to and cooperates with the fourth channel 302 of the second heat exchange section 30, and the sixth interface 56 of the second connector 432 corresponds to and cooperates with the second channel 304 of the second heat exchange section 30. The connector can also include a fixing member 450 for fixing or limiting. The first connector 431 and the second connector 432 can have fixing holes, and the fixing member 450 can be fixed or limited in the fixing hole 409.

[0074] The throttling heat exchange component can make the thermal management system easy to install and connect, reduce the number of connected pipes, and reduce the size of the system. Taking the throttling heat exchange component used in a vehicle thermal management system as an example, it should be noted that these components are fixed in actual use. For the sake of clarity, the flow of the refrigerant is shown in the exploded view. This is just for the sake of clarity. In a specific vehicle thermal management system, the vehicle thermal management system includes a refrigerant system and a battery thermal management system. Figure 26As shown in other views, the battery thermal management system includes a first interface portion 101 and a second interface portion 102 of the throttling heat exchange component, and a flow channel portion in the first heat exchange portion that is connected to the first interface and the second interface. The heat of the battery can be transferred to the coolant, which flows through the first interface 51 or the second interface 52 through the flow channel of the first heat exchange portion, and exchanges heat with the refrigerant in the other flow channel in the first heat exchange portion. After cooling, the coolant returns to cool the battery. The third interface 53, the fourth interface 54, the fifth interface 55, and the sixth interface 56 are respectively used to connect with the refrigerant system. For example, the refrigerant cooled by the condenser enters the throttling heat exchange component through the third interface 53, or the refrigerant through the liquid storage device enters the throttling heat exchange component through the third interface 53. In this way, the high-temperature and high-pressure refrigerant passes through the guide hole 202 to the third channel 301 of the second heat exchange part, and exchanges heat with the refrigerant in another flow channel in the second heat exchange part 30 to the fourth channel 302. The refrigerant in the fourth channel 302 is divided into two parts: one part flows out from the fifth interface 55 through the connecting part 432, such as passing through the fifth interface 55 to the front evaporator or other evaporators, and a throttling element can also be set in front of the front evaporator; the other part of the refrigerant enters the throttling element 110 through the hole 2081, the groove 2080 and the inclined hole 2082 of the bridge, and is throttled by the throttling element 110. Hole 2091 goes to the second channel 104 of the first heat exchange part 10, and exchanges heat with the coolant in the coolant channel of the first heat exchange part, reaches the first channel 103, and passes through the hole 2084 of the bridge, the first channel 303 of the second heat exchange part, and flows out through the fourth interface connected to the first channel 303, such as returning to the compressor; in addition, the sixth interface 56 can be used to connect the refrigerant flowing back from the previous evaporator or other evaporator. This part of the low-temperature refrigerant 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. In the first channel 303, the two parts of the refrigerant converge and can flow back to the compressor through the fourth interface. In this way, part of the low-temperature refrigerant is used to cool the high-temperature refrigerant, which can reduce the condensation temperature of the refrigerant without making the temperature of the refrigerant returning to the compressor higher. The flow directions in this article are for illustration only and are not intended to be limiting or a requirement for closure. Other components may be added, such as other control valves in front of the compressor.

[0075] The throttling heat exchange component can also be Figures 29-32 As shown, Figure 29 This is a perspective schematic diagram of a fifth embodiment of a throttling heat exchange component. Figure 30 This is an exploded diagram of the throttling heat exchange component. Figure 31 This is a schematic diagram of the bridge of the throttling heat exchange component. Figure 32 for Figure 31The diagram shows the bridge in another direction and a cross-sectional view in the GG and FF directions. The throttling heat exchange assembly includes a first heat exchange section 10, a throttling element 110, a bridge 20, a second heat exchange section 30, and a connector. The bridge 20 is mostly located between the first heat exchange section 10 and the second heat exchange section 30, and the connector is located on the other side of the second heat exchange section 30. That is, the bridge 20 and the connector are located on either side of the second heat exchange section. The first heat exchange section 10, bridge 20, and second heat exchange section 30 are fixed together by welding, or the first heat exchange section 10, bridge 20, second heat exchange section 30, and connector are fixed together by welding. The first heat exchange section 10 is larger than the second heat exchange section 30.

[0076] The first heat exchange part 10 has a heat exchange core. The first heat exchange part 10 includes at least two flow channels for fluid to flow through for heat exchange. The two fluid flow channels are separated. The first heat exchange part 10 includes interlayer flow channels separated by stacked plates. The first heat exchange part 10 can flow through at least two fluids. The two fluids can exchange heat in the first heat exchange part. For example, one fluid is a refrigerant and the other can be a coolant, such as used to cool heating elements such as batteries or to cool the vehicle compartment. In addition, it can also be used for three fluids, such as one fluid is a refrigerant and the other two can be coolants. The two coolants can be controlled to exchange heat with the refrigerant, and then the coolant can be used to cool the components that need to be cooled after heat exchange and cooling. The following is an example of two fluids.

[0077] The throttling heat exchange assembly has a first interface 51, a second interface 52, a third interface 53, a fourth interface 54, a fifth interface 55, and a sixth interface 56. The first heat exchange section is provided with a first interface portion 101 and a second interface portion 102, the bridge 20 is provided with a third interface portion 211, and the connecting member is provided with a fourth interface portion 54, a fifth interface portion 55, and a sixth interface portion 56. The throttling element 110 is fixedly mounted or positionally fixed to the bridge 20. The first heat exchange section 10 has four channels, such as the first channel 103 and the second channel 104 (two channels connected to the coolant are not shown). The first heat exchange part 10 includes a first interface part 101 and a second interface part 102. The first interface part 101 has a first interface 51 for communicating with the coolant, and the second interface part 102 has a second interface 52 for communicating with the coolant. The first interface 51 and the second interface 52 are connected through the flow channel of the heat exchange core. The first interface part 101 and the second interface part 102 can be part of the side plate of the first heat exchange part, or they can be separately processed and fixed to the side plate and / or heat exchange core of the first heat exchange part by welding. The first interface part and the second interface part can also be fixed to the first heat exchange part in the form of pipe connectors.

[0078] The bridge 20 has a first matching portion 200 and a second matching portion 200'. Correspondingly, the first heat exchange portion 10 has a matching portion 100, which matches the first matching portion 200 of the bridge. The second heat exchange portion 30 has a matching portion 300, which matches the second matching portion 200' of the bridge. The matching portion 100 of the first heat exchange portion 10, the matching portion 300 of the second heat exchange portion 30 and the two matching portions of the bridge all include a flat portion. The hole, groove or opening of the conducting portion for communication on the side of the first matching portion 200 of the bridge is located inside the first matching portion and each opening for communication is surrounded by The first matching part is surrounded by the first heat exchange part, and the first heat exchange part has a corresponding communicating mouth at a position corresponding to the position of each communicating mouth of the bridge, and each communicating mouth of the first heat exchange part is located inside its matching part and each communicating mouth is surrounded by the matching part; in this way, after the matching part 100 of the first heat exchange part 10 and the first matching part 200 of the bridge are welded and sealed, the communicating mouth of the bridge can be communicated with the corresponding communicating mouth of the first heat exchange part, or in other words, each communicating mouth is surrounded by a part of the matching part, and the two form a roughly closed structure at the relatively arranged matching parts. The first heat exchange section 10 has the openings of the first channel 103 and the second channel 104 on the side opposite the bridge 20. The bridge 20 also has corresponding holes 2084 and 2091 on the side opposite the first heat exchange section 10. The opening of hole 2084 corresponds to the opening of the first channel 103 of the first heat exchange section, and the opening of hole 2091 corresponds to the opening of the second channel 104 of the first heat exchange section. Furthermore, the bridge 20 has a groove 2080 on the side opposite the first heat exchange section 10. Groove 2080 communicates with hole 2081'. On the other side of the groove, there is an inclined hole 2082. The other end of inclined hole 2082 connects to the hole of the second mounting section 209. Thus, the hole of the second mounting section 209 communicates with hole 2081' via inclined hole 2082 and groove 2080.

[0079] The mating portion 300 of the second heat exchange portion 30 corresponds to the position of the second mating portion 200' of the bridge. After the two are welded and sealed, the mouth of the bridge on this side for communication corresponds to the mouth of the second heat exchange portion for communication. Specifically, the second heat exchange portion 30 has three openings of the channel on the side opposite to the bridge 20: the third channel 301, the fourth channel 302, and the opening of the first channel 303. The bridge 20 has the opening of the guide hole 202, the opening of the hole 2081' and the opening of the hole 2084 on the side opposite to the second heat exchange portion 30. The opening of the third channel 301 of the second heat exchange portion corresponds to the position of the opening of the guide 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.

[0080] The bridge 20 includes a third interface portion 211, a first mounting portion 207, and a second mounting portion 209. The third interface portion 211 has a third interface 53 and includes an outwardly protruding structure. The third interface portion 211 can be an integral structure with the bridge body, or a separately machined structure secured to the bridge body by welding. The first mounting portion 207 is used to accommodate the mounting of the sensing element 250, and the second mounting portion 209 is used to accommodate the mounting of the throttling element 110. The hole in the first mounting portion 207 is connected to the hole 2084. A sensing element, such as a temperature sensor, with a temperature sensing head 2501, passes through the first mounting portion 207 and is located in the flow path where the hole 2084 is located. This allows the temperature of the refrigerant after passing through the first heat exchange portion, or the outlet temperature of the evaporator, to be determined.

[0081] In addition, the bridge 20 is provided with four holes 2032 to reduce the weight of the bridge and to reduce the area of the flat portion for welding, thereby improving the welding quality. The bridge 20 is also provided with fixing holes 221 for fixing.

[0082] The connector includes a first connector 441 and a second connector 442. The first connector 441 includes a fourth interface 54, and the second connector 442 has a fifth interface 55 and a sixth interface 56. The first connector 441 has a space corresponding to and matching the first channel 303 of the second heat exchange unit 30 to achieve a flow path from the first channel 303 to the fourth interface. Alternatively, the first connector 441 can be fixed to a corresponding position around the first channel 303 in the manner of a joint. The fifth interface 55 of the second connector 442 corresponds to and matches the fourth channel 302 of the second heat exchange unit 30, and the sixth interface 56 of the second connector 442 corresponds to and matches the second channel 304 of the second heat exchange unit 30. The connector can also include a fixing member 450 for fixing or limiting. The first connector 441 and the second connector 442 can have fixing holes 409, and the fixing member 450 can be fixed or limited in position in the fixing holes 409.

[0083] The throttling heat exchange component can make the thermal management system easy to install and connect, reduce the number of connected pipes, and reduce the size of the system. Taking the throttling heat exchange component used in a vehicle thermal management system as an example, it should be noted that these components are fixed in actual use. For the sake of clarity, the flow of the refrigerant is shown in the exploded view. This is just for the sake of clarity. In a specific vehicle thermal management system, the vehicle thermal management system includes a refrigerant system and a battery thermal management system. Figure 30As shown in other views, the battery thermal management system includes a first interface portion 101 and a second interface portion 102 of the throttling heat exchange component, and a flow channel portion in the first heat exchange portion that is connected to the first interface and the second interface. The heat of the battery can be transferred to the coolant, which flows through the first interface 51 or the second interface 52 through the flow channel of the first heat exchange portion, and exchanges heat with the refrigerant in the other flow channel in the first heat exchange portion. After cooling, the coolant returns to cool the battery. The third interface 53, the fourth interface 54, the fifth interface 55, and the sixth interface 56 are used for connecting the refrigerant system. For example, the refrigerant cooled by the condenser enters the throttling heat exchange component through the third interface 53 through the bridge, or the refrigerant through the liquid storage device enters the throttling heat exchange component through the third interface 53. In this way, the high-temperature and high-pressure refrigerant passes through the guide hole 202 to the third channel 301 of the second heat exchange part, and exchanges heat with the refrigerant in another flow channel in the second heat exchange part 30 to the fourth channel 302. The refrigerant in the fourth channel 302 is divided into two parts: one part flows out from the fifth interface 55 through the connecting part 442, such as passing through the fifth interface 55 to the front evaporator or other evaporators, and a throttling element can also be set in front of the front evaporator; the other part of the refrigerant enters the throttling element 110 through the hole 2081', the groove 2080 and the inclined hole 2082 of the bridge, and is throttled by the throttling element 110 after Hole 2091 goes to the second channel 104 of the first heat exchange part 10, and exchanges heat with the coolant in the coolant channel of the first heat exchange part, reaches the first channel 103, and passes through the hole 2084 of the bridge, the first channel 303 of the second heat exchange part, and flows out through the fourth interface connected to the first channel 303, such as returning to the compressor; in addition, the sixth interface 56 can be used to connect the refrigerant flowing back from the previous evaporator or other evaporator. This part of the low-temperature refrigerant 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. In the first channel 303, the two parts of the refrigerant converge and can flow back to the compressor through the fourth interface. In this way, part of the low-temperature refrigerant is used to cool the high-temperature refrigerant, which can reduce the condensation temperature of the refrigerant without making the temperature of the refrigerant returning to the compressor higher. The flow directions in this article are for illustration only and are not intended to be limiting or a requirement for closure. Other components may be added, such as other control valves in front of the compressor.

[0084] The throttling heat exchange component can also be Figure 33-Figure 37 As shown, Figure 33 This is a perspective schematic diagram of a sixth embodiment of a throttling heat exchange component. Figure 34 Explosion diagram of the throttling heat exchange component, Figure 35 Schematic diagram of the bridge of the throttling heat exchange component in two directions. Figure 36 for Figure 35 Schematic diagram of the bridge from the front and rear, Figure 37 for Figure 33The throttling heat exchange assembly is shown as a three-dimensional schematic diagram from two directions. The throttling heat exchange assembly includes a first heat exchange portion 10, a throttling element 110, a bridge 20, a second heat exchange portion 30, and a connector 45. The bridge 20 is mostly located between the first heat exchange portion 10 and the second heat exchange portion 30, and the connector 45 is located on the other side of the second heat exchange portion 30. That is, the bridge 20 and the connector 45 are located on either side of the second heat exchange portion. The first heat exchange portion 10, the bridge 20, and the second heat exchange portion 30 are fixed together by welding, or the first heat exchange portion 10, the bridge 20, the second heat exchange portion 30, and the connector are fixed together by welding.

[0085] The first heat exchange part 10 has a heat exchange core. The first heat exchange part 10 has two flow channels for fluid to flow through for heat exchange. The two fluid flow channels are separated. The first heat exchange part 10 includes interlayer flow channels separated by stacked plates. The first heat exchange part 10 can flow through at least two fluids. The two fluids can exchange heat in the first heat exchange part. For example, one fluid is a refrigerant and the other can be a coolant, such as used to cool heating elements such as batteries; it can also be used for three fluids, such as one fluid is a refrigerant and the other two can be coolants. The two coolants can be controlled and selected to exchange heat with the refrigerant, and then the coolant can be used to cool the components that need to be cooled after heat exchange and cooling. The specific explanation is given using two fluids as an example.

[0086] The throttling heat exchange assembly has a first interface 51, a second interface 52, a third interface 53, a fourth interface 54, a fifth interface 55, and a sixth interface 56. The first heat exchange portion is provided with a first interface portion 101 and a second interface portion 102, the bridge 20 is provided with a third interface portion 211, and the connecting piece 45 is provided with a fourth interface 54, a fifth interface 55, and a sixth interface 56. The throttling element 110 is fixedly arranged or position-limited with the first heat exchange portion 10, wherein the first heat exchange portion 10 has four channels, such as the first channel 103 and the second channel 104 (not all of which are shown in the figure). The first heat exchange portion is further provided with a pipe having a connecting port 105 in the second channel 104. The second channel 104 is not connected near the bridge side, and the connecting port 105 is connected to the inlet of the throttling element 110. The first interface portion 101 of the first heat exchange portion 10 has a first interface 51 for communicating with the coolant, and the second interface portion 102 has a second interface 52 for communicating with the coolant. The first interface 51 and the second interface 52 are connected through the flow channel of the heat exchange core. The first interface portion 101 and the second interface portion 102 can be part of the side plate of the first heat exchange portion, or can be separately processed and fixed to the side plate and / or heat exchange core of the first heat exchange portion by welding.

[0087] The bridge 20 has a first matching portion 200 and a second matching portion 200'. Correspondingly, the first heat exchange portion 10 has a matching portion 100, which matches the first matching portion 200 of the bridge. The second heat exchange portion 30 has a matching portion 300, which matches the second matching portion 200' of the bridge. The matching portion 100 of the first heat exchange portion 10, the matching portion 300 of the second heat exchange portion 30 and the two matching portions of the bridge all include a flat surface. The bridge is provided with a hole, groove or guide for communication on the side of the first matching portion 200. The openings of the through parts are all located inside the first matching part and each opening for communication is surrounded by the first matching part, and the first heat exchange part has a corresponding communicating opening at a position corresponding to the position of each opening for communication of the bridge, and each communicating opening of the first heat exchange part is located inside its matching part and each communicating opening is surrounded by the matching part; in this way, after the matching part 100 of the first heat exchange part 10 and the first matching part 200 of the bridge are welded and sealed, the connecting opening of the bridge can be aligned with the first heat exchange part. The corresponding openings for communication are connected, or in other words, each opening for communication includes a portion of the matching portion around it, and both form a substantially closed structure at the matching portions arranged opposite to each other; the matching portion 300 of the second heat exchange portion 30 corresponds to the second matching portion 200' of the bridge, and after the two are welded and sealed, the openings for communication on this side of the bridge are all connected to the openings for communication of the second heat exchange portion. Specifically, the second heat exchange portion 30 has three openings on the side opposite to the bridge 20: the third channel 301, the fourth channel 302, and the fourth channel 303. 2. The mouth of the first channel 303. The bridge 20, on the side opposite the second heat exchange section 30, i.e., the second mating portion, comprises the mouth of the guide groove 264, the mouth of the first hole 262, and the mouth of the second hole 266. The second hole 266 is equal to or greater than the diameter of the first hole 262. The mouth of the third channel 301 of the second heat exchange section corresponds to a portion of the mouth of the guide groove 264. The mouth of the fourth channel 302 corresponds to the position of the mouth of the first hole 262. The mouth of the first channel 303 corresponds to the position of the mouth of the second hole 266. The guide groove 264 includes a first portion 2641, a second portion 2642, and a transition portion 2640. The first portion 2641 is relatively close to the third interface portion, while the second portion 2642 is relatively far from the third interface portion. The transition portion 2640 is located between the first portion 2641 and the second portion 2642. The depth of the first part 2641 is greater than the depth of the second part 2642. The depth of the first part 2641 near the third interface is greater than or equal to half of the thickness of the bridge or close to half of the thickness of the bridge. If the depth is greater than or equal to one-third of the thickness of the bridge and less than two-thirds of the thickness of the bridge, the first part 2641 is connected to the third interface.On the side of the bridge opposite the first heat exchange section, the first heat exchange section 10 has the mouth of the first channel 103 and the connecting port 105 connected to the throttling element on the side opposite the bridge 20. The bridge 20 has corresponding third and fourth grooves 263 and 265 on the side opposite the first heat exchange section 10. The third groove 263 connects to the first hole 262, and the fourth groove 265 connects to the second hole 266. The mouth of the fourth groove 265 partially corresponds to the mouth of the first channel 103 of the first heat exchange section. The mouth of the third groove 263 also connects to the connecting port 105 connected to the throttling element. The front projection of either the guide groove 264 or the third interface 53 is at least partially located in the third groove 263. The front projection of the guide groove 264 is at least partially located in the fourth groove 265. The guide groove 264 and the fourth groove 265 are at least partially opposite each other and are not directly connected. The first, second, third, and fourth numbers herein are for clarification only and do not specify the number of grooves or holes.

[0088] The bridge 20 includes a third interface portion 211 having a third interface 53 therein. The third interface portion 211 includes an outwardly protruding structure. The third interface portion 211 may be integral with the bridge body or may be separately machined and secured to the bridge body via welding. Furthermore, the bridge 20 is provided with two holes 2032. The first portion 2641 of the guide groove 264 is adjacent to the third interface portion, while the second portion 2642 of the guide groove 264 is relatively distant from the third interface portion. The guide groove 264 extends substantially along its length. The third interface 53 is connected to the first portion 2641 of the guide groove 264. The depth of the second portion 2642 of the guide groove 264 is less than half the thickness of the bridge, and even no more than 0.4 times the thickness of the bridge. The depth of the fourth groove 265 is less than half the thickness of the bridge, and the depth of the third groove 263 is less than half the thickness of the bridge, and even no more than 0.4 times the thickness of the bridge. The depth of the third groove 263 is no more than 0.4 times the thickness of the bridge. In this way, grooves can be provided on both sides of the bridge to form relatively independent flow channels with the two heat exchange components, thereby reducing the overall assembly. The thickness of the bridge herein refers to the thickness of the two mating portions of the bridge. The bridge 20 is further provided with two shoulders 212 and 213 , and the shoulders 212 and 213 at least partially protrude from the main body. The bridge 20 is provided with fixing holes 221 , and at least one shoulder or a position close to the shoulder is provided with a fixing hole.

[0089] The hole 2032 in this article is intended to reduce weight and make the bridge suitable for welding with the first heat exchange part and the second heat exchange part. The hole 2032 passes through 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 is not connected to the channel of the first heat exchange part, the hole 2032 is not connected to the channel of the second heat exchange part, and the hole 2032 is not connected to the hole or groove used for communication of the bridge; the distance between the hole 2032 and the hole for communication in the direction of the bridge or close to the first heat exchange part is greater than or equal to 1.5 mm, and the distance between the hole 2032 and the groove used for communication in the direction of the bridge or close to the first heat exchange part is greater than or equal to 1.5 mm; the distance between the hole 2032 and the hole for communication in the direction of the bridge or close to the second heat exchange part is greater than or equal to 1.5 mm, and the distance between the hole 2032 and the groove used for communication in the direction of the bridge or close to the second heat exchange part is greater than or equal to 1.5 mm.

[0090] The connector 45 includes a main body 4510 and an extension 4511. The connector 45 is provided with a fourth interface 54, a fifth interface 55, and a sixth interface 56. Furthermore, a fixing hole 459 is provided for cooperating fixation or limiting. The connector 45 has a groove 455 on the side facing the second heat exchange portion 30. The groove 455 is a structure similar to a blind hole. The groove 455 extends from the extension portion to the location of the sixth interface 56 and is connected to the sixth interface 56. The connector may also include a fixing member 450 for fixing or limiting. The fixing member 450 can be fixed or limited in the fixing hole 459. The second heat exchange portion has a fourth channel 302, a first channel 303, and a second channel 304 facing the connector. The fourth interface 54 of the connector corresponds to the first channel 303, the fifth interface 55 corresponds to the fourth channel 302, and the sixth interface 56 is connected to the second channel 304 via the groove 455.

[0091] The throttling heat exchange component can make the thermal management system easy to install and connect, reduce the number of connected pipes, and reduce the volume of the system. Taking the throttling heat exchange component used in a vehicle thermal management system as an example, it should be noted that these components are relatively fixed in actual use. For the sake of clarity, the flow of the refrigerant is shown in the exploded view. This is just for the sake of clarity. In a specific vehicle thermal management system, the vehicle thermal management system includes a refrigerant system and a battery thermal management system. Figure 34In other views, the battery thermal management system includes a first interface portion 101 and a second interface portion 102 of a throttling heat exchange component, and a flow channel portion in the first heat exchange portion that is connected to the first interface and the second interface. The heat of the battery can be transferred to the coolant, which flows through the first interface 51 or the second interface 52 through the flow channel of the first heat exchange portion, and exchanges heat with the refrigerant in the other flow channel in the first heat exchange portion. After cooling, the coolant returns to cool the battery. The third interface 53, the fourth interface 54, the fifth interface 55, and the sixth interface 56 are respectively used to connect with the refrigerant system. For example, the refrigerant cooled by the condenser enters the throttling heat exchange component through the third interface 53, or the refrigerant passing through the liquid reservoir enters the throttling heat exchange component through the third interface 53. In this way, the high-temperature and high-pressure refrigerant flows through the flow channel formed by the bridge and the second heat exchange portion and the space where the guide groove 264 is located to the third channel 301 of the second heat exchange portion, and then to the fourth channel 302 after heat exchange with the refrigerant in the other flow channel in the second heat exchange portion 30, and then to the sixth channel 56. The refrigerant in the four-hole channel 302 is divided into two parts: one part flows out through the connecting piece 45 and the fifth interface 55, such as flowing to the front evaporator or other evaporators through the fifth interface 55, and the evaporator may be provided with a throttling element, or the evaporator may be divided and flowed to two evaporators after throttling, or the evaporator may be divided and flowed to the evaporator after throttling, etc.; the other part of the refrigerant flows through the first hole 262 of the bridge, and the flow channel formed by the space where the third groove 263 is located by the matching part of the bridge and the first heat exchange part, and enters the throttling element 110 through the connecting port 105 connected to the throttling element, and flows through the throttling element. After being throttled by the element 110, the liquid enters the second channel 104 of the first heat exchange part 10, and exchanges heat with the coolant in the coolant channel of the first heat exchange part, reaches the first channel 103, and passes through the flow channel formed by the space where the fourth groove 265 is located in the matching part of the bridge and the first heat exchange part, through the second hole 266, to the first channel 303 of the second heat exchange part, and flows out through the fourth interface corresponding to the first channel 303, such as returning to the compressor; in addition, the sixth interface 56 can be used to connect the previous evaporator and other evaporators. The refrigerant that flows back, this part of the low-temperature refrigerant flows to the second channel 304 of the second heat exchange part through the flow channel formed by the space where the groove 455 is located in cooperation with the connecting piece 45 and the second heat exchange part, and flows to the first channel 303, and exchanges heat with the high-temperature refrigerant flowing from the third channel 301 to the fourth channel 302. In the first channel 303, the two parts of the refrigerant converge and can flow back to the compressor through the fourth interface 54. In this way, part of the low-temperature refrigerant is used to cool the high-temperature refrigerant, which can reduce the condensation temperature of the refrigerant without making the temperature of the refrigerant returning to the compressor higher. The bridge 20 is also provided with a first mounting portion 207 for mounting a sensor element 250, such as a temperature sensor element, so that the temperature sensing head 2501 passes through the mounting portion and is located in the flow channel where the second hole 266 and or the fourth groove 265 are located. In this way, the temperature of the refrigerant after passing through the first heat exchange part or the outlet temperature of the evaporator can be obtained.The second heat exchange part can realize heat exchange between high-temperature refrigerant and part of low-temperature refrigerant, reduce the temperature of high-temperature refrigerant, and will not make the temperature of refrigerant returning to the compressor too high, thereby improving efficiency.

[0092] The throttling heat exchange component includes a first heat exchange part, a bridge, and a second heat exchange part. The bridge is at least partially located between the first heat exchange part and the second heat exchange part. The bridge can relatively easily realize the fluid communication between the two heat exchange parts. Different system requirements can be achieved by changing the structure of the bridge, making the system pipeline simple, reducing the setting of pipelines between interfaces, and making the system connection simple and convenient. The refrigerant flow channel of the first heat exchange part of the above-mentioned component can be a single flow, that is, flowing from the second channel 104 to the first channel 103, and can also be a three-flow flow, that is, the first heat exchange part is roughly divided into three parts horizontally. The first flow flows from the bottom part of the second channel 104 to the bottom part of the first channel 103, then flows from the middle part of the first channel 103 to the middle part of the second channel 104, and then flows from the upper part of the second channel 104 to the upper part of the first channel 103. Therefore, the embodiment only describes the outflow from the first channel 103. Unless otherwise specified, the thickness of the bridge refers to the thickness between the planar parts of the two mating parts of the bridge. The flow directions described herein are for illustrative purposes only and are not intended to be limiting or a requirement for closure. Other components, such as control valves before the compressor, may be added. For example, a throttling element or even a control valve may be provided before the evaporator. The second channel 104 of the first heat exchange section is connected to the outlet of the throttling element 110 herein, but generally does not require an outlet when oriented toward the bridge. The diagram is merely a representation of the channel's location. These technical solutions can be modified based on the actual system, and the connectivity will be determined by the specific technical solution. For example, if the first interface is connected to the second interface, this does not preclude simultaneous connectivity with other interfaces.

[0093] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. For example, with respect to the directional definitions of “front”, “back”, “left”, “right”, “up” and “down”, although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified, combined or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included within the scope of the claims of this solution.

Claims

1. A throttling heat exchange component, comprising a first heat exchange portion (10), a bridge (20), a second heat exchange portion (30), and a throttling element (110), wherein the bridge (20) is at least partially located between the first heat exchange portion (10) and the second heat exchange portion (30), and the first heat exchange portion, the bridge, and the second heat exchange portion are fixed by welding; the first heat exchange portion has a heat exchange core, the first heat exchange portion includes at least two fluid flow channels, and the two fluid flow channels are not connected; the throttling element (110) is fixedly arranged or position-limited with the first heat exchange portion (10), or the throttling element (110) is fixedly arranged or position-limited with the bridge; The throttling heat exchange component comprises a first interface (51), a second interface (52), and a third interface (53); the first heat exchange portion comprises a first interface portion (101) and a second interface portion (102); the first interface portion (101) has the first interface (51), and the second interface portion (102) has the second interface (52); the bridge comprises two holes or grooves for communication toward the first heat exchange portion; the bridge comprises at least two holes and or grooves capable of communicating with the second heat exchange portion, and the holes and or grooves of the bridge capable of communicating with the second heat exchange portion are The bridge is further provided with a first mounting portion (207), the throttling heat exchange assembly includes a sensor element (250), the sensor element (250) is mounted on the first mounting portion (207), the sensor head (2501) of the sensor element (250) is located in a hole and / or a groove of the bridge, the first channel (103) of the first heat exchange portion is connected to the first channel (303) of the second heat exchange portion through the hole and / or the groove where the sensor head (2501) is located, and the fluid in the first channel (303) of the first heat exchange portion is a refrigerant.

2. The throttling heat exchange component according to claim 1, characterized in that: The throttling element (110) is fixedly arranged or limitedly arranged with the first heat exchange part (10); the throttling heat exchange component also includes a connecting piece, and the throttling heat exchange component also includes a fourth interface (54), a fifth interface (55), and a sixth interface (56), and the connecting piece has the fourth interface (54), the fifth interface (55), and the sixth interface (56); one of the two holes and / or grooves for communication of the bridge facing or close to the first heat exchange part is communicated with the throttling element, and the other is communicated with the first channel (103) of the first heat exchange part; the two holes and / or grooves of the bridge that are communicated with the second heat exchange part can be respectively communicated with a channel of the second heat exchange part.

3. The throttling heat exchange component according to claim 1, characterized in that: The bridge includes a second mounting portion (209), the throttling element (110) is fixedly arranged or limitedly arranged on the bridge, and the throttling element is fixed or limited to the second mounting portion (209); the two holes and / or grooves for communication of the bridge facing or close to the first heat exchange portion include a hole (2091), the hole (2091) is located on the second mounting portion, the hole (2091) is communicated with the outlet of the throttling element, and the outlet of the throttling element is communicated with the second channel (104) of the first heat exchange portion through the hole (2091), The other of the two holes and / or grooves for communication of the bridge facing or close to the first heat exchange part is communicated with the first channel (103) of the first heat exchange part; one of the two holes and / or grooves of the bridge capable of communicating with the second heat exchange part is communicated with the first channel (303) of the second heat exchange part, and the other is communicated with the inlet of the throttling element and is communicated with a channel (302) of the second heat exchange part; the first channel (103) of the first heat exchange part is communicated with the first channel (303) of the second heat exchange part via the bridge or via a flow channel.

4. The throttling heat exchange component according to claim 3, characterized in that: The second heat exchange portion is no larger than the first heat exchange portion, and the second mounting portion (209) at least partially protrudes from the second heat exchange portion; the bridge (20) has a corresponding hole (2084) for circulation on the side opposite to the first heat exchange portion, and the hole (2084) corresponds to or is connected to the position of the first channel (103) of the first heat exchange portion; the bridge also has a groove (2080) on the side opposite to the first heat exchange portion, and the bridge includes through holes (2081, 2081'); one side of the groove (2080) has the holes (2081, 2081'), or one side of the groove is connected to the hole (208 1, 2081'), and an inclined hole (2082) is provided on the other side of the groove (2080), wherein the inclined hole (2082) connects the hole of the second mounting portion (209) and the groove (2080), and the hole of the second mounting portion (209) is connected to the holes (2081, 2081') through the inclined hole (2082) and the groove (2080); the sensing head (2501) is located in a through hole of the bridge, and one end of the through hole is connected or opposite to and connected with the first channel (103) of the first heat exchange portion, and the other end of the through hole is connected or opposite to and connected with the first channel (303) of the second heat exchange portion.

5. The throttling heat exchange component according to claim 1 or 2, characterized in that: The bridge includes a third interface portion, and a guide hole (202, 202') is provided on the bridge side facing the second heat exchange portion. The guide hole (202, 202') is in communication with the third interface portion, and the guide hole is provided close to the third interface portion. The depth of the guide hole (202, 202') is greater than or equal to one-third of the thickness of the bridge and less than two-thirds of the thickness of the bridge. The guide hole (202, 202') is in communication with or opposite to and in communication with the third channel (301) of the second heat exchange portion; the bridge also includes a through hole (206), a first groove (203), a second groove (205), and a conducting portion (204). The conducting portion (204) includes a hole (2041) and a groove (2042). The first groove (203) is provided on the second heat exchange portion. The invention relates to a heat exchanger having a first heat exchange portion and a second heat exchange portion, wherein the second groove (205) and the groove (2042) of the conducting portion (204) are arranged on the side opposite to the first heat exchange portion; the first groove (203) and the second groove (205) are communicated with each other through the through hole (206); the first groove (203) is communicated with the fourth channel (302) of the second heat exchange portion; the first channel of the first heat exchange portion is communicated with the first channel (303) of the second heat exchange portion through the conducting portion (204) of the bridge; the side of the bridge facing the first heat exchange portion is defined as the front side, and the side of the bridge facing the second heat exchange portion is defined as the back side; the projection of the first groove (203) toward the front side is at least partially located in the groove (2042) of the conducting portion, and the projection of the guide hole toward the front side is at least partially located in the second groove.

6. The throttling heat exchange component according to claim 1 or 2, characterized in that: The bridge includes a third interface portion, and the bridge is provided with a guide groove (264) and two holes on the side facing the second heat exchange portion: a first hole (262) and a second hole (266). The diameter of the wall forming the second hole (266) is greater than or equal to the diameter of the wall forming the first hole (262). The guide groove (264) is communicated with the third interface portion, and the guide groove (264) includes a first portion (2641) and a second portion (2642). The first portion is relatively close to the third interface portion, and the second portion is relatively far from the third interface portion. The depth of the first portion is at least partially greater than the depth of the second portion. At least a partial depth of the first portion near the third interface portion is greater than or equal to one third of the thickness of the bridge. The first portion is communicated with the third interface portion. The second heat exchange portion has three openings on the side opposite to the bridge, and the guide groove (264), the first hole (262), and the second hole (266) of the bridge are respectively used to communicate with one of the three openings of the second heat exchange portion; the bridge has two grooves on the side opposite to the first heat exchange portion: a third groove (263) and a fourth groove (265); the third groove (263) is communicated with the first hole (262), and the fourth groove (265) is communicated with the second hole (266); The first channel (103) of the first heat exchange portion is in communication with a channel of the second heat exchange portion through the fourth groove (265) and the second hole (266), and / or the first channel (103) of the first heat exchange portion is in communication with a channel of the second heat exchange portion through the third groove (263) and the first hole (262); The side of the bridge facing the first heat exchange portion is defined as the front side, and the side of the bridge facing the second heat exchange portion is defined as the back side. One of the guide groove (264) and the projection of the third interface toward the front side is at least partially located in the third groove (263), and the projection of the guide groove (264) toward the front side is at least partially located in the fourth groove.

7. The throttling heat exchange component according to any one of claims 1 to 4, characterized in that: The throttling heat exchange component also includes a connecting piece, which is located on the side of the second heat exchange part away from the bridge; the connecting piece has a fourth interface (54), a fifth interface (55), and a sixth interface (56); the fourth interface (54) is connected to the first channel (303) of the second heat exchange part, the fifth interface (55) is connected to the fourth channel (302) of the second heat exchange part, and the sixth interface (56) is connected to the second channel (304) of the second heat exchange part; the bridge includes three holes or grooves that can be connected to the second heat exchange part, the bridge includes a third interface part, the third interface part is provided with the third interface, and the third interface (53) of the throttling heat exchange component is connected to the third channel (301) of the second heat exchange part through the hole and / or groove of the bridge.

8. The throttling heat exchange component according to claim 5, characterized in that: The throttling heat exchange component also includes a connecting piece, which is located on the side of the second heat exchange part away from the bridge; the connecting piece has a fourth interface (54), a fifth interface (55), and a sixth interface (56); the fourth interface (54) is connected to the first channel (303) of the second heat exchange part, the fifth interface (55) is connected to the fourth channel (302) of the second heat exchange part, and the sixth interface (56) is connected to the second channel (304) of the second heat exchange part; the bridge includes three holes or grooves that can be connected to the second heat exchange part, the bridge includes a third interface part, the third interface part is provided with the third interface, and the third interface (53) of the throttling heat exchange component is connected to the third channel (301) of the second heat exchange part through the hole and / or groove of the bridge.

9. The throttling heat exchange component according to claim 6, characterized in that: The throttling heat exchange component also includes a connecting piece, which is located on the side of the second heat exchange part away from the bridge; the connecting piece has a fourth interface (54), a fifth interface (55), and a sixth interface (56); the fourth interface (54) is connected to the first channel (303) of the second heat exchange part, the fifth interface (55) is connected to the fourth channel (302) of the second heat exchange part, and the sixth interface (56) is connected to the second channel (304) of the second heat exchange part; the bridge includes three holes or grooves that can be connected to the second heat exchange part, the bridge includes a third interface part, the third interface part is provided with the third interface, and the third interface (53) of the throttling heat exchange component is connected to the third channel (301) of the second heat exchange part through the hole and / or groove of the bridge.

10. The throttling heat exchange component according to any one of claims 1 to 3, characterized in that: The throttling heat exchange assembly also includes a connecting piece, which is located on the side of the second heat exchange part away from the bridge; the connecting piece has a fourth interface (54), a fifth interface (55), a sixth interface (56), and a seventh interface (57); the bridge includes a third interface part, and the third interface part has a third interface (53); the bridge includes three holes that can communicate with the second heat exchange part: one of the holes communicates with the third interface (53) and the third channel (301) of the second heat exchange part, the second hole communicates with the fourth channel (302) of the second heat exchange part, and the third hole is a through hole, and the through hole (223) communicates with the first channel (103) of the first heat exchange part and the first channel (303) of the second heat exchange part; the seventh interface (57) communicates with the fourth channel (302) of the second heat exchange part; the connecting piece is fixed to the second heat exchange part by welding.

11. The throttling heat exchange component according to any one of claims 1 to 4, characterized in that: The bridge has a first matching portion (200) and a second matching portion (200'); the first heat exchange portion has a matching portion (100), and the matching portion of the first heat exchange portion corresponds to the first matching portion of the bridge; the second heat exchange portion has a matching portion (300), and the matching portion of the second heat exchange portion corresponds to the second matching portion (200') of the bridge; the matching portion of the first heat exchange portion, the matching portion of the second heat exchange portion and the two matching portions of the bridge include planar portions; the mouth of the hole or groove of the bridge for communicating with, facing or approaching the first heat exchange portion is located inside the first matching portion; the mouth of the hole or groove of the bridge that can communicate with the second heat exchange portion and is close to the second heat exchange portion is located inside the second matching portion.

12. The throttling heat exchange component according to claim 7, characterized in that: The bridge has a first matching portion (200) and a second matching portion (200'); the first heat exchange portion has a matching portion (100), and the matching portion of the first heat exchange portion corresponds to the first matching portion of the bridge; the second heat exchange portion has a matching portion (300), and the matching portion of the second heat exchange portion corresponds to the second matching portion (200') of the bridge; the matching portion of the first heat exchange portion, the matching portion of the second heat exchange portion and the two matching portions of the bridge include planar portions; the mouth of the hole or groove of the bridge for communicating with, facing or approaching the first heat exchange portion is located inside the first matching portion; the mouth of the hole or groove of the bridge that can communicate with the second heat exchange portion and is close to the second heat exchange portion is located inside the second matching portion.

13. The throttling heat exchange component according to claim 8 or 9, characterized in that: The bridge has a first matching portion (200) and a second matching portion (200'); the first heat exchange portion has a matching portion (100), and the matching portion of the first heat exchange portion corresponds to the first matching portion of the bridge; the second heat exchange portion has a matching portion (300), and the matching portion of the second heat exchange portion corresponds to the second matching portion (200') of the bridge; the matching portion of the first heat exchange portion, the matching portion of the second heat exchange portion and the two matching portions of the bridge include planar portions; the mouth of the hole or groove of the bridge for communicating with, facing or approaching the first heat exchange portion is located inside the first matching portion; the mouth of the hole or groove of the bridge that can communicate with the second heat exchange portion and is close to the second heat exchange portion is located inside the second matching portion.

14. The throttling heat exchange component according to claim 10, characterized in that: The bridge has a first matching portion (200) and a second matching portion (200'); the first heat exchange portion has a matching portion (100), and the matching portion of the first heat exchange portion corresponds to the first matching portion of the bridge; the second heat exchange portion has a matching portion (300), and the matching portion of the second heat exchange portion corresponds to the second matching portion (200') of the bridge; the matching portion of the first heat exchange portion, the matching portion of the second heat exchange portion and the two matching portions of the bridge include planar portions; the mouth of the hole or groove of the bridge for communicating with, facing or approaching the first heat exchange portion is located inside the first matching portion; the mouth of the hole or groove of the bridge that can communicate with the second heat exchange portion and is close to the second heat exchange portion is located inside the second matching portion.

15. The throttling heat exchange component according to claim 11, characterized in that: The bridge further includes at least one hole (2032), the hole (2032) passing through 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) is not connected to the channel of the first heat exchange part, the hole (2032) is not connected to the channel of the second heat exchange part, and the hole (2032) is not connected to the hole or groove of the bridge for communication; the distance between the hole and the hole or groove for communication toward or close to the first heat exchange part of the bridge is greater than or equal to 1.5 mm, and the distance between the hole and the hole or groove for communication toward or close to the second heat exchange part of the bridge is greater than or equal to 1.5 mm.

16. The throttling heat exchange component according to claim 12 or 14, characterized in that: The bridge further includes at least one hole (2032), the hole (2032) passing through 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) is not connected to the channel of the first heat exchange part, the hole (2032) is not connected to the channel of the second heat exchange part, and the hole (2032) is not connected to the hole or groove of the bridge for communication; the distance between the hole and the hole or groove for communication toward or close to the first heat exchange part of the bridge is greater than or equal to 1.5 mm, and the distance between the hole and the hole or groove for communication toward or close to the second heat exchange part of the bridge is greater than or equal to 1.5 mm.

17. The throttling heat exchange assembly according to claim 13, characterized in that: The bridge further includes at least one hole (2032), the hole (2032) passing through 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) is not connected to the channel of the first heat exchange part, the hole (2032) is not connected to the channel of the second heat exchange part, and the hole (2032) is not connected to the hole or groove of the bridge for communication; the distance between the hole and the hole or groove for communication toward or close to the first heat exchange part of the bridge is greater than or equal to 1.5 mm, and the distance between the hole and the hole or groove for communication toward or close to the second heat exchange part of the bridge is greater than or equal to 1.5 mm.

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