HEAT EXCHANGE DEVICE

A heat exchange device including a valve element component, a core body component and a connecting member having a first end and a second end, and the second end is provided with a welding section and an adjacent section; the core body component is provided with a welding matching portion; the welding section is welded to the welding matching portion, and the adjacent section is adjacent to the welding section; the outer diameter of the welding section is smaller than or equal to the inner diameter of the welding matching portion, and the outer diameter of the adjacent section is smaller than or equal to the inner diameter of the welding matching portion; and the distance between the end of the welding matching portion away from the valve element component and the end of the welding section away from the valve element component is larger than or equal to zero.

This application is a National Phase entry of PCT Application No. PCT/CN2021/090450, filed on Apr. 28, 2021, which claims the benefit of priority to Chinese Patent Application No. 202010362743.9, titled “HEAT EXCHANGE DEVICE”, filed with the State Intellectual Property Office of People's Republic of China on Apr. 30, 2020, which are incorporated herein by reference in their entirety.

FIELD

The present application relates to the technical field of thermal management, and in particular to a heat exchange device.

BACKGROUND

A thermal management system includes a circuit for circulating a refrigerant. A heat exchanger and an expansion valve are required in the thermal management system, and the above two members are generally connected by pipelines in the thermal management system.

Various members of the heat exchanger are fixed by welding, and the heat exchanger may highly shrink after welding because of the melting of the solder during welding. Therefore, a valve body of the expansion valve may be fixed to a mounting plate of the heat exchanger in an integration of the heat exchanger and the expansion valve.

SUMMARY

An object of the present application is to provide a heat exchange device with good sealing performance.

A heat exchange device is provided according to an embodiment of the present application, which includes a valve core member, a core body member, and the valve core member is fixed to the core body member;the core body member includes a plate portion, the plate portion includes multiple plates, the plate portion at least includes a first hole passage, a second hole passage and an inter-plate passage, and the first hole passage, the second hole passage and the inter-plate passage are in communication;the heat exchange device includes a connecting member, the connecting member includes a first end portion and a second end portion, the first end portion is located in the first hole passage, the second end portion includes a welding section and an adjacent section, the core body member includes a welding matching portion, the welding section is welded to the welding matching portion, the adjacent section is adjacent to the welding section, an outer diameter of the welding section is smaller than or equal to an inner diameter of the welding matching portion, an outer diameter of the adjacent section is smaller than or equal to the inner diameter of the welding matching portion; and a distance between an end, away from the valve core member, of the welding matching portion and an end, away from the valve core member, of the welding section is greater than or equal to zero; andthe valve core member includes a valve seat portion, the valve seat portion includes a bottom opening, a throttle hole and a peripheral opening, and the peripheral opening is in communication with the bottom opening through the throttle hole, and the peripheral opening is in communication with a part, outside the connecting member, of the first hole passage; the connecting member includes a communication chamber, and the bottom opening is in communication with the communication chamber of the connecting member.

The technical solution according to the present application includes the connecting member, the welding section of the connecting member is welded to the welding matching portion, the adjacent section is adjacent to the welding section, the outer diameter of the welding section is smaller than or equal to the inner diameter of the welding matching portion, and the outer diameter of the adjacent section is smaller than or equal to the inner diameter of the welding matching portion; in this way, since the connecting member includes the welding section and the adjacent section in a case that the core body member shrinks during welding, the distance between the end, away from the valve core member, of the welding matching portion and the end, away from the valve core member, of the welding section is larger than or equal to zero, so that the welding matching portion is movable relative to the connecting member during the welding shrinkage of the core body member, and the welding between the connecting member and the core body member has good sealing performance.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Referring toFIGS.1to3,FIG.1is a schematic structural view of a heat exchange device1.

The heat exchange device1at least includes a first flow passage101and a second flow passage, the fluid in the first flow passage101can exchange heat with the fluid in the second flow passage; the fluid in the first flow passage101may be a refrigerant, and the fluid in the second flow passage may be a coolant. The heat exchange device1may include a third flow passage, a fourth flow passage, and the like.

The heat exchange device1includes a valve core member11, a core body member12and a connecting member13, the valve core member11is assembled with and fixed to the core body member12, and the connecting member13is fixed to the core body member12, such as by welding. The valve core member11may be of, for example, a valve core structure of an expansion valve.

The core body member12includes a top pressing block122, a plate portion121and a bottom pressing block123, and the top pressing block122, the plate portion121and the bottom pressing block123are fixed by welding. The plate portion121at least includes a first hole passage1211, a second hole passage1213and an inter-plate passage1212, the first hole passage1211, the inter-plate passage1212and the second hole passage1213are in communication, and the first flow passage101includes part of the first hole passage1211, the second hole passage1213and the inter-plate passage1212.

Herein, the first hole passage1211and the second hole passage1213are hole passages when the core body member12is not assembled with the valve core member11. After the first hole passage1211and the second hole passage1213are assembled with the valve core member or the connecting member, even if a member or part is located in other members, it still means that the member or the part herein is located in the first hole passage or the second hole passage as long as a position of the member is in the first hole passage or the second hole passage of the core body member.

The plate portion121includes multiple stacked plates, adjacent plates are fixed by welding, each plate at least includes a first hole and a second hole, the first holes of the plates are aligned and the second holes of the plates are aligned along a stacking direction of the plates. The first hole and the second hole are located adjacent to an edge of the plate, so that the fluid flowing through the plate can have a relatively long flow path, which is beneficial to improving the heat exchange efficiency. The first holes of the plates are aligned to form a part of the first hole passage1211, and the second holes of the plates are aligned to form a part of the second hole passage1213.

The top pressing block122includes a third hole1221, the third hole1221is aligned with the first holes, and the “aligned” herein includes that the first holes is coaxial with the third hole, or, an axis of the first holes is parallel to an axis of the third hole; the bottom pressing bock123includes a communication hole1231, the communication hole1231is aligned with the first holes, and the “aligned” herein includes that the first holes is coaxial with the third hole, or, the axis of the first holes is parallel to the axis of the third hole.

The heat exchange device1includes a communication passage103and another communication passage104, the communication passage103is in communication with a communication chamber138of the connecting member13, and the another communication passage104is in communication with the second hole passage1213, so that the fluid can flow in from the communication passage103and flow through an inner chamber of the connecting member13, and flow in the first flow passage and then flow in the inter-plate passage1212of the core body member12after being throttled by the valve core member11, and the fluid exchanges heat with the fluid in the second flow passage in the inter-plate passage1212, which has a simple flow path and high heat exchange efficiency. Alternatively, in other cases, the another communication passage104may be in indirect communication with the second hole passage1213. For example, a pipe may be provided in the second hole passage1213, and the second hole passage1213is in communication with the another communication passage104through the pipe. In other cases, the another communication passage104may not be in communication with the inter-plate passage1212through the second hole passage1213, the another communication passage104and the communication passage103may be arranged on a same side of the core body member12, and the another communication passage104may be adjacent to the communication passage103and in indirect communication with the communication passage103.

The core body member12includes a first side portion124and a second side portion126, at least part of the valve core member11is located on a side where the first side portion124is located, or in other words, the first side portion124of the core body member12refers to a side, provided with the valve core member11, of the core body member12. The communication passage103is located on a side where the second side portion126is located, and the communication passage103is in communication with the communication chamber138. For example, the valve core member11includes a coil portion1120, and the coil portion1120is located on the side where the first side portion124is located.

At least part of the valve core member11inserts into the first hole passage1211, and at least part of the connecting member13inserts into the first hole passage1211.

The valve core member11includes a valve seat portion111, at least part of the valve seat portion111is located in the first hole passage1211, the valve seat portion111includes a peripheral opening1113, a throttle hole1114and a bottom opening1115, the peripheral opening1113is in communication with the first hole passage1211and in communication with the inter-plate passage1212, the connecting member13includes the communication chamber138, one end of the connecting member13is located in the first hole passage1211, the bottom opening1115is in communication with the communication chamber138of the connecting member13, and the communication chamber138is not in direct communication with the first hole passage1211. The valve core member11may be a valve core portion of an electronic expansion valve. In this way, the fluid from the communication chamber138of the connecting member13can flow in the inter-plate passage1212through the bottom opening1115, the throttle hole1114, the peripheral opening1113and the first hole passage1211, so that the fluid can exchange heat with the fluid between adjacent plates inside the plate portion121. The peripheral opening1113may be in direct communication with the first hole passage1211, or may be in direct communication with the inter-plate passage1212.

Herein, the communication chamber138is not in direct communication with the first hole passage1211, which does not exclude a transfer communication between the communication chamber138and the first hole passage1211by providing other members.

The connecting member13includes an annular wall portion131, the valve seat portion111and the annular wall portion131are sealedly arranged, and the sealing form may be a radial sealing or an axial sealing.

The valve seat portion111includes a bottom section1111and a middle section1112, the bottom section1111includes the bottom opening1115, the bottom section1111is located inside the connecting member13, and a peripheral side of the bottom section1111and the annular wall portion131of the connecting member13are sealedly arranged. The middle section1112includes the peripheral opening1113, the middle section1112is closer to the first side portion124of the core body member12than the bottom section1111in a stacking direction of the core body member12, the middle section1112is located in the plate portion121, and the peripheral opening1113is in communication with the inter-plate passage1212. In this way, a depth of the valve core member11assembled to the core body member12is relatively deep, which is beneficial to reducing a height of the valve core member11protruding from the core body member12, and the overall structure is more compact. When the valve core member is in an open state, the communication passage103, the communication chamber138, the bottom opening1115, the throttle hole1114, the peripheral opening1113, the first hole passage1211, the inter-plate passage1212and the second hole passage1213are in communication.

It should be noted that the bottom section and the middle section herein are merely defined by name, and are not limited in structure.

The connecting member13includes a valve seat matching portion132and a drainage pipe133, the valve seat matching portion132is fixed to the valve seat portion133, such as by welding or other fixing methods such as by riveting. The valve seat matching portion132is provided with the annular wall portion131, and a height of the annular wall portion131is larger than a height of the bottom section1111along the stacking direction of the plates of the core body member12. A first groove1116is defined in the bottom section1111, the heat exchange device1includes a first sealing member14, the first sealing member14is located in the first groove1116, and the first sealing member14abuts against and closely cooperates with the annular wall portion131to realize sealing between the first sealing member14and the annular wall portion131, which effectively avoids the leakage between the bottom section1111and the annular wall portion131.

The valve seat matching portion132includes a side hole1321, and the side hole1321is closer to the first side portion124of the core body member12than the annular wall portion along the stacking direction of the plates of the core body member12. The side hole1321corresponds to the peripheral opening1113of the valve core member11. In this way, the fluid from the bottom opening1115of the valve core member11, flows in the first hole passage1211through the throttle hole1114, the peripheral opening1113and the side hole1321, and flows in the inter-plate passage1212in communication with the first hole passage1211to exchange heat with the fluid in the second flow passage. The throttling and depressurization of the refrigerant are competed inside the core body member12, and the connection with the subsequent heat exchange links is smooth, which reduces the factors such as gas-liquid stratification of the refrigerant after throttling and depressurization in a long pipeline from affecting the heat exchange efficiency of the subsequent heat exchange by the pipeline arrangement.

The connecting member13is fixed to the core body member12by welding, the core body member12includes a welding matching portion125, the welding matching portion125is fixed to the connecting member13by welding, and a thickness of the welding matching portion125is greater than a thickness of at least two stacked plates along an extending direction of the first hole passage1211. In this way, since the welding matching portion125has the thickness greater than two stacked plates during the welding shrinkage process of the core body member12, the connecting member13can be well welded to the welding matching portion125during welding, which is beneficial to stability of sealing.

The connecting member13includes a first end portion134and a second end portion135, the first end portion134is located in the first hole passage1211, the second end portion135of the connecting member13includes a welding section1352and an adjacent section1351, the welding section1352of the connecting member13is welded to the welding matching portion125, the adjacent section1351is adjacent to the welding section1352, the adjacent section1351is closer to the first end portion134than the welding section1352, an outer diameter of the welding section1352is smaller than or equal to an inner diameter of the welding matching portion125, an outer diameter of the adjacent section1351is smaller than or equal to the inner diameter of the welding matching portion125; since the connecting member has the welding section and the adjacent section in a case that the core body member shrinks during the welding, a distance between an end, away from the valve core member, of the welding matching portion and an end, away from the valve core member, of the welding section is larger than or equal to zero, so that the welding matching portion is movable relative to the connecting member during the welding shrinkage of the core body member, and the welding between the connecting member and the core body member has good sealing performance. In addition, the outer diameter of the adjacent section1351may be larger than or equal to the outer diameter of the welding section1352, and the welding section1352can be reduced in diameter relative to the adjacent section1351, which is more beneficial to the relative movement of the plate portion relative to the connecting member during the welding.

The valve seat matching portion132includes a flange portion1322, and the flange portion1322is fixed to the core body member12by welding. The plates of the core body member12include a first plate1214aand a second plate1215a, the first plate1214ais fixed to the second plate1215aby welding, a top or a bottom of the flange portion1322is fixed to the first plate1214aby welding; or the top or the bottom of the flange portion1322is fixed to the second plate1215aby welding.

The core body member12includes the top pressing block122, the flange portion1322is fixed to the top pressing block122by welding, and the valve seat portion111of the valve core member11inserts in from the third hole1221of the top pressing block122. The valve seat matching portion132and the plate portion121are fixed and limited by the flange portion1322. The flange portion1322is fixed to the top pressing block122of the core body member12when the plate portion121shrinks during welding, which can ensure the certainty of a position of the valve seat matching portion132in the core body member12, and reduce the risk of affecting the position of the valve seat matching portion132after the plates shrink and reduce the risk of fluid leakage between the valve seat matching portion132and the valve seat.

The core body member12includes the bottom pressing block123, part of the connecting member13inserts into the bottom pressing block123, the bottom pressing block123includes the welding matching portion125, the welding section1352is located in the bottom pressing block123, the welding section1352is located in the welding matching portion125, the welding section1352is fixed to the bottom pressing block123by welding, and the first end portion134is welded to the core body member12by welding. In this way, the connecting member13can be fixed to the core body member during the welding of the core body member, which can be completed by one-time welding, and the processing is convenient.

The valve seat matching portion132includes a bottom end portion1328, the drainage pipe133is fixed to the bottom end portion1328by welding, and at least part of the drainage pipe133inserts into the valve seat matching portion132; the drainage pipe133includes a first portion1331and a second portion1332, at least part of the first portion1331inserts into the valve seat matching portion132, and the at least part of the first portion1331is fixed to the valve seat matching portion132by welding. The second end portion of the connecting member13is arranged in the second portion of the drainage pipe133, and part of the second portion1332of the drainage pipe133is located in the welding matching portion125and is fixed to the welding matching portion125by welding.

The bottom pressing block123includes a protrusion1232, the protrusion1232inserts into the first hole passage1211, the protrusion1232includes the communication hole1231in communication with the first hole passage1211, the welding matching portion125is arranged on an inner wall of the protrusion1232, the welding section inserts into the communication hole1231of the protrusion1232, and an outer wall of the protrusion1232is fixed to the plate portion121by welding.

The drainage pipe133includes an external expansion portion1333, the external expansion portion1333does not insert into the valve seat matching portion132, and the external expansion portion1333cooperates with the bottom end portion1328of the valve seat matching portion132for limiting. In this way, since the plate portion121may shrink during the welding of the core body member12, the drainage pipe133may be blocked by the external expansion portion1333and the bottom end portion of the valve seat matching portion132by providing the external expansion portion1333if the drainage pipe133moves upward toward the valve seat matching portion132, so that a position of the drainage pipe133inserting into the valve seat matching portion132is determined, which reduces the risk of sealing fit between the bottom section1111and the connecting member13caused by the excessive depth of the drainage pipe133protruding into the valve seat matching portion132, and reduces the influence on the flow passage between the bottom section1111and the drainage pipe133.

Furthermore, the flange portion1322includes a limiting groove1323, the first plate1214aincludes a limiting protrusion (not shown), and the limiting groove1323cooperates with the limiting protrusion to prevent the connecting member13form moving in a circumferential direction, which is beneficial to the stability of the structure and the stability of sealing.

Referring toFIG.4andFIG.5,FIG.4andFIG.5are schematic structural views of a heat exchange device2. Although some reference numerals inFIG.4are not indicated below, the reference numerals of the same parts in the above embodiment are also marked inFIG.4to facilitate understanding and avoid repetition and redundancy.

The core body member12includes a third plate1214band a fourth plate1215b, the third plate1214bis fixed to the fourth plate1215bby welding, the third plate1214bincludes a first annular protruding portion1219a, the fourth plate1215bincludes a second annular protruding portion1219b, a first hole is defined in the first annular protruding portion1219a, a first hole is defined in the second annular protruding portion1219b, the first hole passage1211extends through the first annular protruding portion1219aand the second annular protruding portion1219b, the first annular protruding portion1219ainserts into the first hole of a plate adjacent to the third plate1214b, the second annular protruding portion1219binserts into the first hole of a plate adjacent to the fourth plate1215b, a gap is left between the first annular protruding portion1219aand a wall portion of the first hole defined in the plate adjacent to the third plate1214b, and a gap is left between the second annular protruding portion1219band a wall portion of the first hole defined in the plate adjacent to the fourth plate1215b, so that the fluid can flow through an outer periphery of the first annular protruding portion1219aand flow in the inter-plate passage1212for heat exchange.

The valve core member11includes the valve seat portion111, at least part of the valve seat portion111is located in the first hole passage1211, the valve seat portion111includes the peripheral opening1113, the throttle hole1114and the bottom opening1115, the peripheral opening1113is in communication with the first hole passage1211, and the bottom opening1115is in communication with the communication chamber138of the connecting member13. The valve core member11may be a valve core portion of an electronic expansion valve.

The valve seat portion111includes the bottom section1111and the middle section1112, the bottom section1111includes the bottom opening1115, the middle section1112includes the peripheral opening1113, and the middle section1112is closer to the first side portion124of the core body member12than the bottom section1111in the stacking direction of the core body member12. The middle section1112is located in the first hole passage1211, so that a depth of the valve core member11assembled to the core body member12is relatively deep, which is beneficial to reducing a height of the valve core member11protruding from the core body member12, and the overall structure is more compact. The first side portion124of the valve core member12refers to a side of the core body member12provided with the valve core member11.

At least part of the valve seat portion111inserts into the first annular protruding portion1219a, and the bottom section1111and the annular protruding portion1219aare sealedly arranged; the first groove1116is defined in the bottom section1111, the heat exchange device1includes the first sealing member14, the first sealing member14is located in the first groove1116, and the first sealing member14closely cooperates with the annular protruding portion1219ato realize sealing between the first sealing member14and the annular protruding portion1219a, which effectively avoids the leakage between the bottom section1111and the annular protruding portion1219a.

A side where the core body member12is provided with the valve core member11is defined as an upper side, and the middle section1112is located on the upper side of the connecting member13; the fluid flows in from the bottom opening1115, and flows out of the peripheral opening1113after flowing through the throttle hole1114, so that the fluid that has just flowed in the core body member12flows out of the peripheral opening1113after being throttled and depressurized by the expansion valve, and flows in the inter-plate passage1212to exchange heat with the fluid in the second flow passage. The throttling and depressurization of the refrigerant are competed inside the core body member12, and the connection with the subsequent heat exchange links is smooth, which reduces the factors such as gas-liquid stratification of the refrigerant after throttling and depressurization in a long pipeline from affecting the heat exchange efficiency of the subsequent heat exchange by the pipeline arrangement.

The connecting member13includes the first end portion134and the second end portion135, and at least part of the first end portion134is fixed to the second annular protruding portion1219bby welding. Specifically, at least part of the first end portion134inserts into the second annular protruding portion1219b, and at least part of an outer wall of the first end portion134is fixed to an inner wall of the second annular protruding portion1219bby welding. For example, a welding ring may be provided during welding.

At least part of the second end portion135is fixed to the bottom pressing block123by welding, and the at least part of the second end portion135inserts into a position where the first hole is defined in the bottom pressing block123.

The first end portion134includes a first section1341and a second section1342, the first section1341of the first end portion134inserts into the second annular protruding portion1219b, the second section1342does not insert into the second annular protruding portion1219b, an outer diameter of the second section1342is greater than an outer diameter of the first section1341, and the outer diameter of the second section1342is greater than an inner diameter of the second annular protruding portion1219b. For example, the outer diameter of the second section1342may be reduced toward the first section1341. In this way, the plate may shrink when the stacked plates are fed into a furnace for welding, which results in a reduction in height of the stacked core body member12. At this time, the first end portion134of the connecting member is difficult to insert into the bottom opening1115of the bottom section1111during the shrinkage of the plates by providing the second section1342, which reduces the influence on the bottom section1111caused by the change in height caused by shrinkage of the connecting member13during the welding of the core body member12, is beneficial to improving the cooperation between the valve core member11and the core body member12, and is beneficial to improving the sealing between the valve core member11and the core body member12of the fluid.

In addition, the second end portion135of the connecting member13includes a welding section1352and an adjacent section1351, the welding section1352of the connecting member13is welded to the welding matching portion125, the adjacent section1351is adjacent to the welding section1352, the adjacent section1351is closer to the first end portion134than the welding section1352, the outer diameter of the welding section1352is smaller than or equal to the inner diameter of the welding matching portion125, and the outer diameter of the adjacent section1351is smaller than or equal to the inner diameter of the welding matching portion125; since the connecting member has the welding section and the adjacent section in a case that the core body member shrinks during the welding, the distance between the end, away from the valve core member11, of the welding matching portion125and the end, away from the valve core member11, of the welding section is larger than or equal to zero, so that the welding matching portion125is movable relative to the connecting member13during the welding shrinkage of the core body member12, and the welding between the connecting member13and the core body member12has good sealing performance. In addition, the outer diameter of the adjacent section1351may be greater than or equal to the outer diameter of the welding section1352, and the welding section1352can be reduced in diameter relative to the adjacent section1351, which is more beneficial to the relative movement of the plate portion relative to the connecting member13during the welding.

The welding section1352may include a first zone section and a second zone section, the first zone section is welded to the welding matching portion125, the second zone section is adjacent to the first zone section, the second zone section is farther away from the first end portion than the first zone section, and an outer diameter of the second zone section is smaller than or equal to an inner diameter of the first zone section; the first zone section may not be arranged corresponding to the welding matching portion125when the connecting member13is assembled into the core body member12, and the first zone section moves to the welding matching portion125and is fixed to the welding matching portion125by welding when the core body member shrinks.

Referring toFIG.6,FIG.6is a schematic cross-sectional view of a heat exchange device. In order to show the structures more clearly, the following structures may not be shown inFIG.6, but reference can be made toFIG.2andFIG.3. Although some reference numerals inFIG.6are not indicated below, the same reference numerals of the same parts in the above embodiments are also marked inFIG.6to facilitate understanding and avoid repetition and redundancy.

The heat exchange device at least includes the first flow passage101and the second flow passage, the fluid in the first flow passage101can exchange heat with the fluid in the second flow passage; the fluid in the first flow passage101may be a refrigerant, and the fluid in the second flow passage may be a coolant. The heat exchange device may include a third flow passage, a fourth flow passage, and the like.

The heat exchange device1includes the valve core member11, the core body member12and the connecting member13, the valve core member11is assembled with and fixed to the core body member12, and the connecting member13is fixed to the core body member12, such as by welding. The valve core member11may be of, for example, a valve core structure of an expansion valve.

The core body member12includes the top pressing block122, the plate portion121and the bottom pressing block123, and the top pressing block122, the plate portion121and the bottom pressing block123are fixed by welding. The plate portion121at least includes the first hole passage1211, the second hole passage1213and the inter-plate passage1212, the first hole passage1211, the inter-plate passage1212and the second hole passage1213are in communication, and the first flow passage101includes part of the first hole passage1211, the second hole passage1213and the inter-plate passage1212. The first hole passage1121and the second hole passage1213are hole passages when the core body member12is not assembled with the valve core member11.

The plate portion121includes multiple stacked plates, adjacent plates are fixed by welding, each plate at least includes a first hole and a second hole, the first holes of the plates are aligned and the second holes of the plates are aligned along the stacking direction of the plates. The first hole and the second hole are located adjacent to the edge of the plate, so that the fluid flowing through the plate can have a relatively long flow path, which is beneficial to improving the heat exchange efficiency. The first holes of the plates are aligned to form a part of the first hole passage1211, and the second holes of the plates are aligned to form a part of the second hole passage1213.

The top pressing block122includes the third hole1221, the third hole1221is aligned with the first holes, the bottom pressing bock123includes the communication hole1231, and the communication hole1231is aligned with the first holes.

The heat exchange device includes the communication passage103and the another communication passage104, the communication passage103is in communication with the communication chamber138of the connecting member13, and the another communication passage104is in communication with the second hole passage1213, so that the fluid can flow in from the communication passage103and flow through the inner chamber of the connecting member13, and then flow in the inter-plate passage1212of the core body member12after being throttled by the valve core member11to exchange heat with the fluid in the second flow passage, which has a simple flow path and high heat exchange efficiency. Alternatively, in other cases, the another communication passage104may be in indirect communication with the second hole passage1213. For example, a pipe may be provided in the second hole passage1213, and the second hole passage1213is in communication with the another communication passage104through the pipe. In other cases, the another communication passage104may not be in communication with the inter-plate passage1212through the second hole passage1213, the another communication passage104may be arranged on a side, provided with the communication passage103, of the core body member12, and the another communication passage104may be adjacent to the communication passage103and not in direct communication with the communication passage103.

At least part of the valve core member11inserts into the first hole passage1211, and at least part of the connecting member13inserts into the first hole passage1211.

The valve core member11includes the valve seat portion111, at least part of the valve seat portion111is located in the first hole passage1211, the valve seat portion111includes the peripheral opening1113, the throttle hole1114and the bottom opening1115, the peripheral opening1113is in communication with the first hole passage1211, and the bottom opening1115is in communication with the communication chamber138of the connecting member13. The valve core member11may be a valve core portion of an electronic expansion valve.

The valve seat portion111includes the bottom section1111and the middle section1112, the bottom section1111includes the bottom opening1115, the bottom section1111is located inside the connecting member13, and the peripheral side of the bottom section1111and the annular wall portion131of the connecting member13are sealedly arranged. The middle section1112includes the peripheral opening1113, the middle section1112is closer to the first side portion124of the core body member12than the bottom section1111along the stacking direction of the core body member12, the middle section1112is located in the plate portion121, and the peripheral opening1113is in communication with the inter-plate passage1212. In this way, a depth of the valve core member11assembled to the core body member12is relatively deep, which is beneficial to reducing a height of the valve core member11protruding from the core body member12, and the overall structure is more compact.

The connecting member13includes the annular wall portion131, and the valve seat portion111and the annular wall portion131are sealedly arranged. A height of the annular wall portion131is larger than a height of the bottom section1111along the stacking direction of the plates of the core body member12. The first groove1116is defined in the bottom section1111, the heat exchange device includes the first sealing member14, the first sealing member14is located in the first groove1116, and the first sealing member14closely cooperates with the annular wall portion131to realize sealing between the first sealing member14and the annular wall portion131, which effectively avoids the leakage between the bottom section1111and the annular wall portion131.

The connecting member13includes a side hole1321, and the side hole1321is closer to the first side portion124of the core body member12than the annular wall portion131along the stacking direction of the plates of the core body member12. The side hole1321corresponds to the peripheral opening1113of the valve core member11. In this way, the fluid flows in from the bottom opening1115of the valve core member11through the drainage pipe133, and flows in the first hole passage1211through the throttle hole1114, the peripheral opening1113and the side hole1321, and then flows in the inter-plate passage1212in communication with the first hole passage1211to exchange heat with the fluid in the second flow passage.

The connecting member13includes the flange portion1322, and the flange portion1322is fixed to the core body member12by welding. The plates of the core body member12include the first plate1214aand the second plate1215a, the first plate1214ais fixed to the second plate1215aby welding, the top or the bottom of the flange portion1322is fixed to the first plate1214aby welding; or the top or the bottom of the flange portion1322is fixed to the second plate1215aby welding.

The core body member12includes the top pressing block122, and the flange portion1322is fixed to the top pressing block122by welding. The valve seat matching portion132and the plate portion121are fixed and limited by the flange portion1322. The flange portion1322is fixed to the top pressing block122of the core body member12during the welding shrinkage of the plate portion121, which can ensure the certainty of the position of the connecting member13in the core body member12, and reduce the risk of affecting the position of the connecting member13after the plates shrink and reduce the risk of fluid leakage between the connecting member13and the valve seat portion111.

The core body member12includes the bottom pressing block123, part of the connecting member13inserts into the bottom pressing block123, the bottom pressing block123includes the welding matching portion125, the second end portion135inserts into the welding matching portion125, and the second end portion135is fixed to the bottom pressing block123by welding.

The bottom pressing block123includes the communication hole1231in communication with the first hole passage1211, the welding matching portion125is arranged on an inner wall of the communication hole1231of the bottom pressing block123, at least part of the second end portion135inserts into the communication hole1231, and a thickness of the bottom pressing block123is greater than a thickness of five plates. In this way, the bottom pressing block123can be welded to an outer wall of the connecting member13to ensure sealing during the welding of the core body member12.

The second end portion135of the connecting member13includes the welding section1352and the adjacent section1351, the welding section1352of the connecting member13is welded to the welding matching portion125, the adjacent section1351is adjacent to the welding section1352, the adjacent section1351is closer to the first end portion134than the welding section1352, the outer diameter of the welding section1352is smaller than or equal to the inner diameter of the welding matching portion125, and the outer diameter of the adjacent section1351is smaller than or equal to the inner diameter of the welding matching portion125; since the connecting member has the welding section and the adjacent section in a case that the core body member shrinks during the welding, the distance between the end, away from the valve core member, of the welding matching portion and the end, away from the valve core member, of the welding section is larger than or equal to zero, so that the welding matching portion is movable relative to the connecting member during the welding shrinkage of the core body member, and the welding between the connecting member and the core body member has good sealing performance. In addition, the outer diameter of the adjacent section1351may be greater than or equal to the outer diameter of the welding section1352, and the welding section1352can be reduced in diameter relative to the adjacent section1351, which is more beneficial to the relative movement of the plate portion relative to the connecting member during the welding.

Referring toFIG.7,FIG.7is a schematic cross-sectional view of yet another embodiment of the heat exchange device. A general structure of the heat exchange device refers to the heat exchange device shown inFIG.6. Although some reference numerals inFIG.7are not indicated below, the same reference numerals of the same parts in the above embodiment are also marked inFIG.7to facilitate understanding and avoid repetition and redundancy. The valve body member12includes a fifth plate1214c, the fifth plate1214cincludes an extension portion1217, and the extension portion1217is fixed to the outer wall of the connecting member13by welding. The side where the core body member12is assembled with the valve core member11is an upper side, and the extension portion1217is located on a lower side of the middle section1112.

The first hole passage1211includes a first sub hole passage1211aand a second sub hole passage1211b, and the extension portion1217is fixed to the outer wall of the connecting member13by welding to separate the first sub hole passage1211afrom the second sub hole passage1211b.

The valve body member12includes a sixth plate1215c, the sixth plate1215cincludes a blocking portion1218, the blocking portion1218is located in the second hole passage1213, the second hole passage1213includes a third sub hole passage1213aand a fourth sub hole passage1213b, and the blocking portion1218separates the third sub hole passage1213afrom the fourth sub hole passage1213b.

The inter-plate passage1212includes a first route1212a, a second route1212band a third route1212c, a flow direction of the first route1212ais opposite to a flow direction of the second route1212b, and the flow direction of the second route1212bis opposite to a flow direction of the third route1212c; in this way, the fluid flows in from the bottom opening1115after it flows in the connecting member13through the communication passage103, and then flows in the first sub hole passage1211a, the first route1212a, the third hole passage1213a, the second route1212b, the second hole passage1211b, the third route1212cand the another communication passage104through the throttle hole1114and the peripheral opening1113. The fluid can realize throttling and depressurization after flowing in the heat exchange device, and the fluid flowing in the inter-plate passage1212from the peripheral opening1113can directly exchange heat with the fluid in the adjacent inter-plate passage1212, and the throttling and heat exchange can be completed inside the core body member12, which not only is beneficial to the stability of phase state of the fluid, but also is beneficial to improving the heat exchange efficiency.

The second end portion135of the connecting member13includes the welding section1352and the adjacent section1351, the welding section1352of the connecting member13is welded to the welding matching portion125, the adjacent section1351is adjacent to the welding section1352, the adjacent section1351is closer to the first end portion134than the welding section1352, the outer diameter of the welding section1352is smaller than or equal to the inner diameter of the welding matching portion125, and the outer diameter of the adjacent section1351is smaller than or equal to the inner diameter of the welding matching portion125; since the connecting member has the welding section and the adjacent section in a case that the core body member shrinks during the welding, the distance between the end, away from the valve core member, of the welding matching portion and the end, away from the valve core member, of the welding section is larger than or equal to zero, so that the welding matching portion is movable relative to the connecting member during the welding shrinkage of the core body member, and the welding between the connecting member and the core body member has good sealing performance. In addition, the outer diameter of the adjacent section1351may be larger than or equal to the outer diameter of the welding section1352, and the welding section1352can be reduced in diameter relative to the adjacent section1351, which is more beneficial to the relative movement of the plate portion relative to the connecting member during the welding.

Along an extending direction of the first hole passage, a thickness of the welding matching portion is greater than or equal to a thickness of two stacked plates, or the thickness of the welding matching portion may be larger than or equal to the thickness of five stacked plates.

The welding section1352may include the first zone section and the second zone section, the first zone section is welded to the welding matching portion125, the second zone section is adjacent to the first zone section, the second zone section is farther away from the first end portion than the first zone section, and the outer diameter of the second zone section is smaller than or equal to the inner diameter of the first zone section; the first zone section may not be arranged corresponding to the welding matching portion125when the connecting member13is assembled into the core body member12, and the first zone section moves to the welding matching portion125and is fixed to the welding matching portion125by welding when the core body member shrinks.

It should be noted that the above is only an example, the extension portion1217may be formed by stamping integrally with the fifth plate, or may be formed by welding with the fifth plate. Alternatively, as other embodiments, the extension portion may protrude from the connecting member, or the extension portion may be welded to the connecting member.

It should be noted that the above embodiments are only used to illustrate the present application rather than limit the technical solutions described in the present application, for example, the definition of directionality such as “front”, “rear”, “left”, “right”, “up” and “down”. Although the present application has been described in detail herein with reference to the above embodiments, those of ordinary skill in the art should understand that the present application may still be combined, modified or equivalently replaced by those skilled in the art, and all technical solutions and its improvements that do not depart from the spirit and scope of the present application should be covered by the scope of the claims of the present application.