Patent Publication Number: US-2023160643-A1

Title: Heat exchanging apparatus and manufacturing method therefor

Description:
This disclosure is a national phase application of PCT international patent application PCT/CN2021/090451, filed on Apr. 28, 2021 which claims the benefit of priorities to the following three Chinese patent applications, all of which are incorporated herein by reference,
         1) Chinese Patent Application No. 202010362743.9, titled “HEAT EXCHANGE APPARATUS”, filed with the China National Intellectual Property Administration on Apr. 30, 2020;   2) Chinese Patent Application No. 202010362753.2, titled “HEAT EXCHANGE APPARATUS AND MANUFACTURING METHOD THEREFOR”, filed with the China National Intellectual Property Administration on Apr. 30, 2020; and   3) Chinese Patent Application No. 202010363934.7, titled “HEAT EXCHANGE APPARATUS”, filed with the China National Intellectual Property Administration on Apr. 30, 2020.       

    
    
     FIELD 
     The present disclosure relates to the technical field of thermal management, and in particular to a heat exchange apparatus. 
     BACKGROUND 
     A heat exchanger and an expansion valve are required in a thermal management system, and the two members are generally connected by pipeline connection in the thermal management system. 
     The heat exchanger can also be integrated with the expansion valve, and a valve body of the expansion valve is fixed to the heat exchanger, so that an overall structure is compact. However, a part of connecting pipes is still connected to the valve body of the expansion valve. 
     SUMMARY 
     An object according to the present disclosure is to provide a heat exchange apparatus with a compact structure and a manufacturing method therefor. 
     A heat exchange apparatus is provided according to an embodiment of the present disclosure, which includes a valve core member, a core body member, and the valve core member is arranged fixed to the core body member; 
     the core body member includes a sheet portion, the sheet portion includes at least a first conduit, a second conduit and an inter-sheets passage, the first conduit, the inter-sheets passage and the second conduit are in communication; 
     the valve core member includes a valve seat portion, the valve seat portion includes a bottom section and a middle section, the bottom section includes a bottom opening, the middle section includes a peripheral opening, the valve seat portion includes a throttle hole, the peripheral opening is in communication with the bottom opening through the throttle hole, the middle section and the bottom section are located in the first conduit, and the peripheral opening is in communication with the first conduit; 
     the heat exchange apparatus includes a connecting member, the connecting member includes a communication cavity, the connecting member includes a first end portion, the first end portion of the connecting member is located in the first conduit, the bottom opening of the bottom section is in communication with the communication cavity; 
     the core body member includes a first side portion and a second side portion, at least part of the valve core member is located on a side where the first side portion is located, the heat exchange apparatus includes a communication passage, the communication passage is located on a side where the second side portion is located, and the communication passage is in communication with the communication cavity. 
     A manufacturing method for a heat exchange apparatus is further provided according to the present disclosure, which includes: 
     provide a sheet portion, and put the stacked sheet portion into a furnace for welding, in which the welded sheet portion includes a first conduit, a second conduit and an inter-sheets passage; 
     provide a valve core member and a connecting member, protrude part of a valve seat portion of the valve core member into the first conduit of the welded sheet portion, in which the valve seat portion includes a bottom section and a middle section and the middle section includes a peripheral opening, protrude part of the bottom section into the connecting member, sealingly connect the bottom section with the connecting member by providing a first sealing member, and assemble and fix the valve core member and the connecting member; and 
     assemble and fix the valve core member and the core body member. 
     The heat exchange apparatus and the manufacturing method therefor are provided according to the embodiments of the present disclosure, the bottom section and the middle section of the heat exchange apparatus are located in the first conduit, the bottom section of the valve seat portion includes the bottom opening, the middle section includes the peripheral opening, the peripheral opening is in communication with the first conduit, and the bottom opening is in communication with the communication cavity, and the communication passage of the heat exchange apparatus is in communication with the communication cavity, so that the heat exchange apparatus has a compact structure. In addition, if an external connecting pipe needs to be connected, the mounting of the external connecting pipe is relatively simple. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic structural view of a first embodiment of a heat exchange apparatus; 
         FIG.  2    is a schematic cross-sectional view of  FIG.  1   ; 
         FIG.  3    is a schematic perspective exploded view of  FIG.  1   ; 
         FIG.  4    is a schematic cross-sectional view of a second embodiment of the heat exchange apparatus; 
         FIG.  5    is a schematic perspective exploded view of the heat exchange apparatus shown in  FIG.  4   ; 
         FIG.  6    is a schematic cross-sectional view of a third embodiment of the heat exchange apparatus; 
         FIG.  7    is a schematic perspective exploded view of the heat exchange apparatus shown in  FIG.  6   ; 
         FIG.  8    is a schematic partial cross-sectional view of a fourth embodiment of the heat exchange apparatus, in which a structure of a sheet portion is omitted; 
         FIG.  9    is a schematic partial cross-sectional view of a fifth embodiment of the heat exchange apparatus, in which the structure of the sheet portion is omitted; 
         FIG.  10    is a schematic cross-sectional view of a sixth embodiment of the heat exchange apparatus; 
         FIG.  11    is a schematic cross-sectional view of a seventh embodiment of the heat exchange apparatus; 
         FIG.  12    is a schematic cross-sectional view of an eighth embodiment of the heat exchange apparatus; 
         FIG.  13    is a schematic partial cross-sectional view of a ninth embodiment of the heat exchange apparatus, in which a matching mode of a connecting member and the sheet portion is illustrated; 
         FIG.  14    is a schematic partial cross-sectional view of a tenth embodiment of the heat exchange apparatus, in which a matching mode of the connecting member and a bottom pressing block is illustrated; 
         FIG.  15    is a schematic cross-sectional view of an eleventh embodiment of the heat exchange apparatus; and 
         FIG.  16    is a schematic cross-sectional view of a twelfth embodiment of the heat exchange apparatus. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Referring to  FIGS.  1  to  3   ,  FIG.  1    is a schematic structural view of a heat exchange apparatus  1 . 
     The heat exchange apparatus  1  includes at least a first flow passage  101  and a second flow passage, a fluid in the first flow passage  101  can exchange heat with a fluid in the second flow passage; the fluid in the first flow passage  101  may be a refrigerant, and the fluid in the second flow passage may be a coolant. The heat exchange apparatus  1  may further include a third flow passage, a fourth flow passage, and the like. 
     The heat exchange apparatus  1  includes a valve core member  11 , a core body member  12  and a connecting member  13 , where the valve core member  11  is assembled with and fixed to the core body member  12 , and the connecting member  13  is arranged fixed to the core body member  12 , such as by welding. The valve core member  11  may have, for example, a valve core structure of an expansion valve. 
     The core body member  12  includes a top pressing block  122 , a sheet portion  121  and a bottom pressing block  123 , where the top pressing block  122 , the sheet portion  121  and the bottom pressing block  123  are fixed by welding. The sheet portion  121  includes at least a first conduit  1211 , a second conduit  1213  and an inter-sheets passage  1212 , the first conduit  1211 , the inter-sheets passage  1212  and the second conduit  1213  are in communication, and the first flow passage  101  includes part of the first conduit  1211 , the second conduit  1213  and the inter-sheets passage  1212 . 
     Herein, the first conduit  1211  and the second conduit  1213  are conduits when the core body member  12  is not assembled with the valve core member  11 . Even if a member or part is located inside other members after the first conduit  1211  and the second conduit  1213  are assembled with the valve core member or the connecting member, it still means that the member or the part herein is located in the first conduit or the second conduit as long as a position of the member is in the first conduit or the second conduit of the core body member. 
     The sheet portion  121  includes multiple stacked sheets, adjacent sheets are fixed by welding, each sheet includes at least a first hole and a second hole, the first holes of the sheets are aligned and the second holes of the sheets are aligned along a stacking direction of the sheets. The first hole and the second hole are located adjacent to an edge of the sheet, so that the fluid flowing through the sheet can have a relatively long flow path, which is beneficial to improving the heat exchange efficiency. The first holes of the sheets are aligned to form a part of the first conduit  1211 , and the second holes of the sheets are aligned to form a part of the second conduit  1213 . 
     The top pressing block  122  includes a third hole  1221 , which is aligned with the first holes, and the “aligned” herein includes that an axis of the first holes is coaxial with or parallel to an axis of the third hole; the bottom pressing bock  123  includes a communication hole  1231 , which is aligned with the first holes, and the “aligned” herein includes that the axis of the first holes is coaxial with or parallel to the axis of the communication hole. 
     The heat exchange apparatus  1  includes a communication passage  103  and another communication passage  104 , the communication passage  103  is in communication with a communication cavity  138  of the connecting member  13 , and the another communication passage  104  is in communication with the second conduit  1213 , so that the fluid can flow in from the communication passage  103  and flow through the communication cavity  138  of the connecting member  13 , and flow in the first flow passage after being throttled by the valve core member  11 , and then flow in the inter-sheets passage  1212  of the core body member  12 , and the fluid exchanges heat with the fluid in the second flow passage in the inter-sheets passage  1212 , which has a simple flow path and high heat exchange efficiency. Of course, in other cases, the other communication passage  104  may be not in direct communication with the second conduit  1213 . For example, a pipe may be provided in the second conduit  1213 , and the second conduit  1213  is in communication with the other communication passage  104  through the pipe. In other cases, the another communication passage  104  may be not in communication with the inter-sheets passage  1212  through the second conduit  1213 , the another communication passage  104  and the communication passage  103  may be arranged on a same side of the core body member  12 , and the another communication passage  104  may be adjacent to the communication passage  103  and be not in direct communication with the communication passage  103 . 
     The core body member  12  includes a first side portion  124  and a second side portion  126 , at least part of the valve core member  11  is located on a side where the first side portion  124  is located, or in other words, the first side portion  124  of the core body member  12  refers to a side of the core body member  12  provided with the valve core member  11 . The communication passage  103  is located on a side where the second side portion  126  is located, and the communication passage  103  is in communication with the communication cavity  138 . For example, the valve core member  11  includes a coil portion  1120 , and the coil portion  1120  is located on the side where the first side portion  124  is located. 
     At least part of the valve core member  11  protrudes into the first conduit  1211 , and at least part of the connecting member  13  protrudes into the first conduit  1211 . The valve core member  11  includes a valve seat portion  111 , at least part of the valve seat portion  111  is located at the first conduit  1211 , the valve seat portion  111  includes a peripheral opening  1113 , a throttle hole  1114  and a bottom opening  1115 , where the peripheral opening  1113  is in communication with the first conduit  1211  and in communication with the inter-sheets passage  1212 , the connecting member  13  includes the communication cavity  138 , one end of the connecting member  13  is located in the first conduit  1211 , the bottom opening  1115  is in communication with the communication cavity  138 , and the communication cavity  138  is not in direct communication with the first conduit  1211 . The valve core member  11  may be a valve core portion of an electronic expansion valve. As such, the fluid from the communication cavity  138  of the connecting member  13  can flow in the inter-sheets passage  1212  through the bottom opening  1115 , the throttle hole  1114 , the peripheral opening  1113  and the first conduit  1211 , so that the fluid can exchange heat with the fluid between adjacent sheets inside the sheet portion  121 . The peripheral opening  1113  may be in direct communication with the first conduit  1211 , or may be in direct communication with the inter-sheets passage  1212 . 
     Herein, the communication cavity  138  is not in direct communication with the first conduit  1211 , which does not exclude a transfer communication between the communication cavity  138  and the first conduit  1211  by a flow passage provided by other members. 
     The connecting member  13  includes an annular wall portion  131 , the valve seat portion  111  is arranged sealed to the annular wall portion  131 , and the sealing form may be a radial sealing or an axial sealing. 
     The valve seat portion  111  includes a bottom section  1111  and a middle section  1112 , the bottom section  1111  includes the bottom opening  1115 , the bottom section  1111  is located inside the connecting member  13 , and a peripheral side of the bottom section  1111  is arranged sealed to the annular wall portion  131  of the connecting member  13 . The middle section  1112  includes the peripheral opening  1113 , the middle section  1112  is relatively closer to the first side portion  124  of the core body member  12  than the bottom section  1111  in a stacking direction of the core body member  12 , the middle section  1112  is located in the sheet portion  121 , and the peripheral opening  1113  is in communication with the first conduit. As such, the depth which the valve core member  11  is assembled to the core body member  12  is relatively great, which is beneficial to reducing a height of the valve core member  11  protruding from the core body member  12 , and the overall structure is more compact. When the valve core member  11  is in an open state, the communication passage  103 , the communication cavity  138 , the bottom opening  1115 , the throttle hole  1114 , the peripheral opening  1113 , the first conduit  1211 , the inter-sheets passage  1212  and the second conduit  1213  are in communication. 
     It should be noted that the bottom section and the middle section herein are merely defined literally, and are not limited to their structures. 
     The connecting member  13  includes a valve seat matching portion  132  and a drainage pipe  133 , the valve seat matching portion  132  is arranged fixed to the valve seat portion  133 , such as by welding or other fixing methods such as by riveting. The valve seat matching portion  132  is provided with the annular wall portion  131 , and a height of the annular wall portion  131  is greater than a height of the bottom section  1111  along the stacking direction of the sheets of the core body member  12 . A first groove  1116  is provided in the bottom section  1111 , the heat exchange apparatus  1  includes a first sealing member  14 , which is located in the first groove  1116 , and closely abuts against the annular wall portion  131  to realize sealing between the first sealing member  14  and the annular wall portion  131 , which effectively avoids the leakage between the bottom section  1111  and the annular wall portion  131 . 
     The valve seat matching portion  132  includes a side hole  1321 , and the side hole  1321  is relatively closer to the first side portion  124  of the core body member  12  than the annular wall portion along the stacking direction of the sheets of the core body member  12 . The side hole  1321  corresponds to the peripheral opening  1113  of the valve core member  11 . As such, the fluid flows in from the bottom opening  1115  of the valve core member  11  through the drainage pipe  133 , and flows in the first conduit  1211  through the throttle hole  1114 , the peripheral opening  1113  and the side hole  1321 , and then flows in the inter-sheets passage  1212  in communication with the first conduit  1211  to exchange heat with the fluid in the second flow passage. The throttling and depressurization of the refrigerant are conducted inside the core body member  12 , and the link with the subsequent heat exchange process is smooth, which reduces the influences of factors such as gas-liquid stratification of the refrigerant after throttling and depressurization in a long pipeline to the heat exchange efficiency of the subsequent heat exchange by the pipeline arrangement. 
     The connecting member  13  is fixed to the core body member  12  by welding, the core body member  12  includes a welding matching portion  125 , which is fixed to an outer wall of the connecting member  13  by welding, and a thickness of the welding matching portion  125  is greater than a thickness of at least two stacked sheets along an extending direction of the first conduit  1211 . As such, during the welding shrinkage process of the core body member  12 , since the welding matching portion  125  has the thickness greater than two stacked sheets, the connecting member  13  can be well welded to the welding matching portion  125  during welding, which is beneficial to the stability of sealing. 
     The valve seat matching portion  132  includes a flange portion  1322 , and the flange portion  1322  is fixed to the core body member  12  by welding. The sheets of the core body member  12  include a first sheet  1214   a  and a second sheet  1215   a , the first sheet  1214   a  is fixed to the second sheet  1215   a  by welding, a top or a bottom of the flange portion  1322  is fixed to the first sheet  1214   a  by welding; or the top or the bottom of the flange portion  1322  is fixed to the second sheet  1215   a  by welding. 
     The core body member  12  includes a top pressing block  122 , the flange portion  1322  is fixed to the top pressing block  122  by welding, and the valve seat portion  111  of the valve core member  11  protrudes in from the third hole  1221  of the top pressing block  122 . The valve seat matching portion  132  and the sheet portion  121  are fixed and limited by the flange portion  1322 . The flange portion  1322  is fixed to the top pressing block  122  of the core body member  12  when the sheet portion  121  shrinks during welding, and thus it can ensure the certainty of a position of the valve seat matching portion  132  in the core body member  12 , and reduce the risk of affecting the position of the valve seat matching portion  132  after the sheets shrink and reduce the risk of fluid leakage between the valve seat matching portion  132  and the valve seat. 
     The core body member  12  includes the bottom pressing block  123 , part of the connecting member  13  protrudes into the bottom pressing block  123 , the bottom pressing block  123  includes the welding matching portion  125 , the welding matching portion  125  includes a welding section  1352 , which is fixed to the bottom pressing block  123  by welding, the connecting member  13  includes a firs end portion  134 , and the first end portion  134  is welded to the core body member  12  by welding. As such, the connecting member  13  can be fixed to the core body member by welding during the welding of the core body member, and the welding can be completed at one time, and the processing is convenient. 
     The valve seat matching portion  132  includes a bottom end portion  1328 , the drainage pipe  133  is fixed to the bottom end portion  1328  by welding, and at least part of the drainage pipe  133  protrudes into the valve seat matching portion  132 ; the drainage pipe  133  includes a first portion  1331  and a second portion  1332 , at least part of the first portion  1331  protrudes into the valve seat matching portion  132 , and the at least part of the first portion  1331  is fixed to the valve seat matching portion  132  by welding. The second end portion of the connecting member  13  is arranged in the second portion  1332  of the drainage pipe  133 , and part of the second portion  1332  of the drainage pipe  133  is located in the welding matching portion  125  and is fixed to the welding matching portion  125  by welding. 
     The bottom pressing block  123  includes a protrusion  1232 , the protrusion  1232  protrudes into the first conduit  1211 , the protrusion  1232  includes the communication hole  1231  which is in communication with the communication cavity  138 , the welding matching portion  125  is arranged in an inner wall of the protrusion  1232 , the second portion  1332  protrudes into the communication hole  1231  of the protrusion  1232 , and an outer wall of the protrusion  1232  is fixed to the sheet portion  121  by welding. 
     The drainage pipe  133  includes an external expansion portion  1333 , the external expansion portion  1333  does not protrude into the valve seat matching portion  132  and the valve seat matching portion  132  is relatively closer to the bottom section  1111  than the external expansion portion  1333  along a stacking direction of the core body member, and the external expansion portion  1333  is matched with the bottom end portion  1328  of the valve seat matching portion  132  for limiting. As such, since the sheet portion  121  shrinks during the welding of the core body member  12 , by providing the external expansion portion  1333 , the drainage pipe  133  will be blocked by the external expansion portion  1333  and the bottom end portion of the valve seat matching portion  132  in case that the drainage pipe  133  moves upward toward the valve seat matching portion  132 , so that a position of the drainage pipe  133  protruding into the valve seat matching portion  132  is determined, which reduces the risk of sealing fit between the bottom section  1111  and the connecting member  13  caused by the excessive depth of the drainage pipe  133  protruding into the valve seat matching portion  132 , and reduces the influence on the flow passage between the bottom section  1111  and the drainage pipe  133 . 
     Furthermore, the flange portion  1322  includes a limiting groove  1323 , the first sheet  1214   a  includes a limiting protrusion (not shown), and the limiting groove  1323  is matched with the limiting protrusion to prevent the connecting member  13  from moving in a circumferential direction, which is beneficial to the stability of the structure and the stability of the sealing. 
     Referring to  FIG.  4    and  FIG.  5   , which are schematic structural views of a heat exchange apparatus  2 , although some reference numerals in  FIG.  4    are not indicated below, the reference numerals of the same parts in the above embodiment are also marked in  FIG.  4    to facilitate understanding and avoid repetition and redundancy. Similar processing is formed in subsequent embodiments. The similarities with the embodiment shown in  FIGS.  1  to  3    will not be described again, and the differences will be described below. 
     At least part of the valve core member  11  protrudes into the first conduit  1211 , and at least part of the connecting member  13  protrudes into the first conduit  1211 . 
     The core body member  12  includes a third sheet  1214   b  and a fourth sheet  1215   b , the third sheet  1214   b  is fixed to the fourth sheet  1215   b  by welding, the third sheet  1214   b  includes a first annular protruding portion  1219   a , the fourth sheet  1215   b  includes a second annular protruding portion  1219   b , a first hole is provided in the first annular protruding portion  1219   a , the first hole is provided in the second annular protruding portion  1219   b , the first conduit  1211  extends through the first annular protruding portion  1219   a  and the second annular protruding portion  1219   b , the first annular protruding portion  1219   a  protrudes into the first hole of a sheet adjacent to the third sheet  1214   b , the second annular protruding portion  1219   b  protrudes into the first hole of a sheet adjacent to the fourth sheet  1215   b , a gap is provided between the first annular protruding portion  1219   a  and a wall portion of the first hole provided in the sheet adjacent to the third sheet  1214   b , and a gap is provided between the second annular protruding portion  1219   b  and a wall portion of the first hole provided in the sheet adjacent to the fourth sheet  1215   b . As such, the fluid can flow through an outer periphery of the first annular protruding portion  1219   a  and flow in the inter-sheets passage  1212  for heat exchange. 
     At least part of the valve seat portion  111  protrudes into the first annular protruding portion  1219   a , and the bottom section  1111  is arranged sealed to the annular protruding portion  1219   a ; the first groove  1116  is provided in the bottom section  1111 , the heat exchange apparatus  1  includes a first sealing member  14 , which is located in the first groove  1116  and is closely matched with the annular protruding portion  1219   a  to realize sealing between the first sealing member  14  and the annular protruding portion  1219   a , which effectively avoids the leakage between the bottom section  1111  and the annular protruding portion  1219   a.    
     Providing that the side of the core body member  12 , which is arranged with the valve core member  11 , is taken as an upper side, the middle section  1112  is located above the connecting member  13 . The fluid flows in from the bottom opening  1115 , and flows out from the peripheral opening  1113  after flowing through the throttle hole  1114 , so that the fluid that has just flowed in the core body member  12  flows out from the peripheral opening  1113  after being throttled and depressurized by the expansion valve, and flows in the inter-sheets passage  1212  to exchange heat with the fluid in the second flow passage. The throttling and depressurization of the refrigerant are conducted inside the core body member  12 , and the link with the subsequent heat exchange process is smooth, which reduces the influences of factors such as gas-liquid stratification of the refrigerant after throttling and depressurization in a long pipeline to the heat exchange efficiency of the subsequent heat exchange by the pipeline arrangement. 
     The connecting member  13  includes a first end portion  134  and a second end portion  135 , and at least part of the first end portion  134  is fixed to the second annular protruding portion  1219   b  by welding. Specifically, at least part of the first end portion  134  protrudes into the second annular protruding portion  1219   b , and at least part of an outer wall of the first end portion  134  is fixed to an inner wall of the second annular protruding portion  1219   b  by welding. For example, a welding ring may be provided during welding. 
     At least part of the second end portion  135  is fixed to the bottom pressing block  123  by welding, and the at least part of the second end portion  135  protrudes into a position of the bottom pressing block  123  provided with the first hole. 
     The first end portion  134  includes a first section  1341  and a second section  1342 , the first section  1341  protrudes into the second annular protruding portion  1219   b , the second section  1342  does not protrude into the second annular protruding portion  1219   b , an outer diameter of the second section  1342  is greater than an outer diameter of the first section  1341 , and the outer diameter of the second section  1342  is greater than an inner diameter of the second annular protruding portion  1219   b , for example, the outer diameter of the second section  1342  may be tapered toward the first section  1341 . As such, the sheet may shrink when the stacked sheets are fed into a furnace for welding, which results in a reduction in height of the stacked core body member  12 . At this time, the first end portion  134  of the connecting member is difficult to protrude into the bottom opening  1115  of the bottom section  1111  during the shrinkage of the sheets by providing the second section  1342 , which reduces the influence on the bottom section  1111  by the change in height caused by shrinkage of the connecting member  13  during the welding of the core body member  12 , and is beneficial to improving the matching between the valve core member  11  and the core body member  12  and improving the sealing between the valve core member  11  and the core body member  12 . 
     The second end portion  135  of the connecting member  13  includes a welding section  1352  and an adjacent section  1351 , the welding section  1352  is welded to the welding matching portion  125 , the adjacent section  1351  is adjacent to the welding section  1352 , the adjacent section  1351  is relatively closer to the first end portion  134  than the welding section  1352 , an outer diameter of the welding section  1352  is smaller than or equal to an inner diameter of the welding matching portion  125 , and an outer diameter of the adjacent section  1351  is smaller than or equal to the inner diameter of the welding matching portion  125 . In a case that the core body member shrinks during the welding, since the connecting member has the welding section and the adjacent section, a distance between an end, away from the valve core member  11 , of the welding matching portion  125  and an end, away from the valve core member  11 , of the welding section  1352  is larger than or equal to zero, the welding matching portion  125  is movable relative to the connecting member  13  during the welding shrinkage of the core body member  12 , and the welding between the connecting member  13  and the core body member  12  has good sealing performance. In addition, the outer diameter of the adjacent section  1351  may be further greater than or equal to the outer diameter of the welding section  1352 , and the diameter of the welding section  1352  can be tapered relative to the adjacent section  1351 , which is more beneficial to the movement of the sheet portion relative to the connecting member  13  during the welding. 
     The welding section  1352  may include a first zone section and a second zone section, the first zone section is welded to the welding matching portion  125 , 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 portion  125  when the connecting member  13  is assembled into the core body member  12 , and the first zone section is moved to the welding matching portion  125  and is fixed to the welding matching portion  125  by welding when the core body member shrinks. 
     Referring to  FIG.  6    and  FIG.  7   , which are schematic cross-sectional views of another heat exchange apparatus, the similarities with the embodiment shown in  FIGS.  1  to  3    will not be described again, and the differences will be described below. 
     Providing that a side of the core body member  11 , which is arranged with the valve core member  12 , is taken as an upper side, the middle section  1112  is located above the connecting member  13 . 
     The connecting member  13  includes the first end portion  134  and the second end portion  135 , the first end portion  134  is arranged matched with the bottom section  1111 , the first end of the connecting member is located in the first conduit, the bottom section  1111  includes the first groove  1116 , the heat exchange apparatus includes the first sealing member  14 , which is located between the first end portion of the connecting member and the valve core member and located in the first groove  1116 . The first sealing member  14  is closely matched with the annular wall portion  131  of the connecting member  13  to realize sealing between the first sealing member  14  and the annular wall portion  131 , which effectively avoids the leakage between the bottom section  1111  and the connecting member  13 . 
     The bottom section  1111  includes a second groove  1117 , which is closer to the peripheral opening  1113  than the first groove  1116 . The first end portion  134  is arranged matched with the bottom section  1111 , the first end portion  134  includes a limiting groove  136 , and a position of the limiting groove  136  is arranged opposite to the second groove  1117 . The heat exchange apparatus includes a limiting member  16 , such as a retaining ring, a part of the retaining ring is located in the second groove  1117 , another part of the retaining ring is located in the limiting groove  136 , and the valve core member  11  and the connecting member  13  are fixed and limited by the retaining ring. 
     The second end portion  135  is arranged fixed to the bottom pressing block  123 , the second end portion  135  includes a groove portion  1353 , the heat exchange apparatus includes a second sealing member  15 , the groove portion  1353  is configured to accommodate the second sealing member  15 , and the second end portion  135  is arranged sealed to the bottom pressing block  123 . 
     A manufacturing method for the heat exchange apparatus shown in  FIG.  6    and  FIG.  7    are provided according to the embodiment of the present disclosure, which includes: 
     provide the sheet portion  121 , and put the stacked sheet portion  121  into a furnace for welding, in which the welded sheet portion  121  includes the first conduit  1211 , the second conduit  1213  and the inter-sheets passage  1212 ; 
     provide the valve core member  11  and the connecting member  13 , protrude the valve seat portion  111  of the valve core member  11  into the first conduit  1211  of the welded sheet portion  121 , in which the valve seat portion  111  includes the bottom section  1111  and the middle section  1112 , the middle section  1112  is provided with a peripheral opening  1113 ; protrude part of the bottom section  1111  into the connecting member  13 , seal the bottom section  1111  with the connecting member  13  by providing the first sealing member  14 ; and assemble and fix the valve core member  11  and the core body member  12 . 
     Furthermore, the manufacturing method further includes: provide the bottom pressing block  123 , put the stacked sheet portion  121  and the bottom pressing block  123  into the furnace for welding; align the communication hole  1231  of the bottom pressing block  123  with the first conduit  1211 ; 
     assemble and fix the valve seat portion  111  and the connecting member  13 ; in which the assembling and fixing the valve seat portion  111  and the connecting member  13  can specifically include: put the first sealing member  14  into the first groove  1116  of the bottom section  1111 , insert the valve core member  11  with the first sealing member  14  into the connecting member  13 , align the second groove  1117  of the bottom section  1111  with the limiting groove  136  of the connecting member  13 , and put the limiting member  16 , such as a retaining ring, into the second groove  1117  and the limiting groove  136  to limit and fix the valve seat portion  111  and the connecting member  13 ; 
     and protrude the assembled connecting member  13  and the assembled valve core member  11  from a side of the sheet portion  121  not welded to the bottom pressing block  123  into the first conduit  1211 , protrude part of the connecting member  13  into the first conduit  1211 , protrude another part of the connecting member  1211  into the bottom pressing blocking  123 , and seal the connecting member  13  with the bottom pressing block  123  by providing the second sealing member  15 ; finally, assemble and fix the valve core member  11  and the core body member  12  to complete the manufacture of the heat exchange apparatus. 
     Through the manufacturing method, the connecting member  13  can be fixed to the core body member  12  by assembly, and the assembly process of the connecting member  13  and the valve core member  11  is configured to be after the welding of the core body member  12 , which reduces the influence of various uncertain factors during the welding of the core body member  12  on the sealing between the connecting member  13  and the core body member  12 , the process is simple and the manufacturing method is simple. 
     Referring to  FIG.  8   , it shows a matching mode of the valve core member  11 , the connecting member  13  and the bottom pressing block  123 , in which a structure of the sheet portion of the core body member  12  is omitted. In order to show the structure more clearly, some reference numerals of the following structures may not be shown in  FIG.  8   , which can make reference to  FIG.  2   . 
     In this embodiment, the middle section  1112  is located in the first conduit  1211 , so that a depth of the valve core member  11  assembled into the core body member  12  is relatively great, which is beneficial to reducing a height of the valve core member  11  protruding from the core body member  12 , and the overall structure is more compact. 
     The connecting member  13  includes the first end portion  134  and the second end portion  135 , at least part of the bottom section  1111  protrudes into the first end portion  134 , the bottom section  1111  includes an external threaded portion  1119 , the connecting member  13  includes an internal threaded portion  1326 , the bottom section  1111  is threaded with the connecting member  13 ; the bottom section  1111  includes a protruding portion  1118 , and the protruding portion  1118  protrudes relative to the internal threaded portion  1326  along a radial direction of the valve core member  11 . The heat exchange apparatus includes the first sealing member  14 , which is located between the protruding portion  1118  and the first end portion  134 . Herein, a part of the first end portion  134  for receiving a portion that the bottom section  1111  protrudes is configured as an annular wall portion, and the bottom section  1111  performs axial sealing by the protruding portion  1118  and the annular wall portion. 
     Furthermore, the connecting member  13  includes a valve seat matching portion  132  and a drainage pipe  133 , the valve seat matching portion  132  includes a first section  1324  and a second section  1325 , the first section  1324  is arranged matched with the valve core member  11 , the first section  1324  of the valve seat matching portion  132  is provided with the internal threaded portion  1326 , the bottom section  1111  is provided with the external threaded portion  1119 , and the valve core member  11  is threaded with the valve seat matching portion  132 . The bottom section  1111  includes the protruding portion  1118 , and the protruding portion  1118  protrudes relative to the internal threaded portion  1326  along the radial direction of the valve core member  11 . The first sealing member  14  is located between the protruding portion  1118  and the valve seat matching portion  132 . 
     The second section  1325  of the valve seat matching portion  132  is arranged matched with the drainage pipe  133 . The drainage pipe  133  protrudes into the second section  1325 , an outer wall of the drainage pipe  133  is fixed to an inner wall of the second section  1325  of the valve seat matching portion  132 , and the drainage pipe  133  can be welded to the valve seat matching portion  132  by a soldering flake. 
     The valve seat matching portion  132  includes a limiting protrusion  1327 , and an end of the drainage pipe  133  is arranged opposite to the limiting protrusion  1327 . The limiting protrusion  1327  is configured to limit a depth of the drainage pipe  133  protruding into the valve seat matching portion  132 , and ensure that the protruding depth of the drainage pipe  133  does not exceed the limiting protrusion  1327  when the core body member  12  shrinks during welding, which is beneficial to the sealing fit and the connection of flow passages between the bottom section  1111  and the valve seat matching portion  132 . 
     As other methods, positions of the drainage pipe  133  and the second section  1325  of the valve seat matching portion  132  can be fixed by screw connection. 
     The manufacturing method shown in  FIG.  8    is provided according to the embodiment of the present disclosure, which includes: 
     provide the sheet portion  121 , and put the stacked sheet portion  121  into a furnace for welding, in which the welded sheet portion  121  includes the first conduit  1211 , the second conduit  1213  and the inter-sheets passage  1212 ; 
     provide the valve core member  11  and the connecting member  13 , protrude the valve seat portion  111  of the valve core member  11  into the first conduit  1211  of the welded sheet portion  121 , in which the valve seat portion  111  includes the bottom section  1111  and the middle section  1112  and the middle section  1112  includes the peripheral opening; protrude part of the bottom section  1111  into the connecting member  13 , seal the bottom section  1111  with the connecting member  13  by providing the first sealing member  14 ; and assemble and fix the valve core member  11  and the core body member  12 . 
     Furthermore, the manufacturing method further includes: provide the bottom pressing block  123 , put the stacked sheet portion  121  and the bottom pressing block  123  into the furnace for welding; align the communication hole  1231  of the bottom pressing block  123  with the first conduit  1211 ; 
     assemble and fixed the valve seat portion  111  and the connecting member  13 ; in which the assembling and fixing the valve seat portion  111  and the connecting member  13  can specifically include: put the first sealing member  14  between the valve seat portion  111  and the connecting member  13 , insert the part of the valve core member  11  into the connecting member  13 , in which the bottom section  1111  is provided with the external threaded portion  1119 , and an inner wall of the connecting member  13  is provided with the internal threaded portion  1326 ; threadedly connect the bottom section  1111  with the connecting member  13 , and obtain the sealing between the bottom section  1111  and the connecting member  13  by the first sealing member  14  at the end of the connecting member  13 ; and 
     protrude the assembled connecting member  13  and the assembled valve core member  11  from a side of the sheet portion  121  that is not welded to the bottom pressing block  123  into the first conduit  1211 , protrude a part of the connecting member  13  into the first conduit  1211 , protrude another part of the connecting member  1211  into the bottom pressing blocking  123 , and sealingly connect the connecting member  13  with the bottom pressing block  123  by providing the second sealing member  15 . Finally, assemble and fix the valve core member  11  and the core body member  12 , to complete the manufacture of the heat exchange apparatus. 
     Through the manufacturing method, the connecting member  13  can be fixed to the core body member  12  by assembly, and the assembly process of the connecting member  13  and the valve core member  11  is configured to be after the welding of the core body member  12 , which reduces the influence of various uncertain factors during the welding of the core body member  12  on the sealing between the connecting member  13  and the core body member  12 , the process is simple and the manufacturing method is simple. 
     Referring to  FIG.  9   , it shows a matching mode of the valve core member  11 , the connecting member  13  and the bottom pressing block  123 , in which the structure of the sheet portion of the core body member  12  is omitted. In order to show the structure more clearly, some reference numerals of the following structures may not be shown in  FIG.  9   , which can make reference to  FIG.  2   . 
     The connecting member  13  includes an annular wall portion  131 , the bottom section  1111  protrudes into the connecting member  13 , and the bottom section  1111  is arranged sealed to the annular wall portion  131 . The heat exchange apparatus includes the bottom pressing block  123 , which is fixed to the sheet portion  121  by welding. The bottom pressing block  123  includes a communication hole  1231  and a protrusion  1232 , at least part of the protrusion  1232  protrudes into the first conduit  1211 , the second end portion  135  of the connecting member  13  is located in the communication hole  1231  of the bottom pressing block  123 , at least part of the second end portion  135  is fixed to the bottom pressing block  123  by welding. The second end portion  135  includes a flared portion  1354 , which is arranged to limit the bottom pressing block  123 , for example, by riveting. 
     Referring to  FIG.  10   , it is a schematic cross-sectional view of the heat exchange apparatus. In order to show the structure more clearly, some reference numerals of the following structures may not be shown in  FIG.  10   , which can make reference to  FIG.  2    and  FIG.  3   . 
     The connecting member  13  includes the annular wall portion  131 , and the valve seat portion  111  is arranged sealed to the annular wall portion  131 . The height of the annular wall portion  131  is greater than the height of the bottom section  1111  along the stacking direction of the sheets of the core body member  12 . The first groove  1116  is provided in the bottom section  1111 , the heat exchange apparatus includes the first sealing member  14 , the first sealing member  14  is located in the first groove  1116 , and the first sealing member  14  is closely matched with the annular wall portion  131  to realize sealing between the first sealing member  14  and the annular wall portion  131 , which effectively avoids the leakage between the bottom section  1111  and the annular wall portion  131 . 
     The connecting member  13  includes the side hole  1321 , and the side hole  1321  is closer to the first side portion  124  of the core body member  12  than the annular wall portion  131  along the stacking direction of sheets of the core body member  12 . The side hole  1321  corresponds to the peripheral opening  1113  of the valve core member  11 . As such, the fluid flows in from the bottom opening  1115  of the valve core member  11  through the drainage pipe  133 , flows in the first conduit  1211  through the throttle hole  1114 , the peripheral opening  1113  and the side hole  1321 , and then flows in the inter-sheets passage  1212  in communication with the first conduit  1211  to exchange heat with the fluid in the second flow passage. 
     The connecting member  13  includes the flange portion  1322 , and the flange portion  1322  is fixed to the core body member  12  by welding. The sheets of the core body member  12  include the first sheet  1214   a  and the second sheet  1215   a , the first sheet  1214   a  is fixed to the second sheet  1215   a  by welding, the top or the bottom of the flange portion  1322  is fixed to the first sheet  1214   a  by welding; or the top or the bottom of the flange portion  1322  is fixed to the second sheet  1215   a  by welding. 
     The core body member  12  includes the top pressing block  122 , and the flange portion  1322  is fixed to the top pressing block  122  by welding. The valve seat matching portion  132  and the sheet portion  121  are fixed and limited by the flange portion  1322 . The flange portion  1322  is fixed to the top pressing block  122  of the core body member  12  by welding during the welding shrinkage of the sheet portion  121 , which can ensure the certainty of the position of the connecting member  13  in the core body member  12 , and reduce the risk of affecting the position of the connecting member  13  after the sheets shrink and reduce the risk of fluid leakage between the connecting member  13  and the valve seat portion  111 . 
     The core body member  12  includes the bottom pressing block  123 , part of the connecting member  13  protrudes into the bottom pressing block  123 , the bottom pressing block  123  includes the welding matching portion  125 , the second end portion  135  protrudes into the welding matching portion  125 , and the second end portion  135  is fixed to the bottom pressing block  123  by welding. 
     The bottom pressing block  123  includes the communication hole  1231  which is in communication with the first conduit  1211 , the welding matching portion  125  is arranged on an inner wall of the bottom pressing block  123  provided with the bottom pressing block  123 , the second end portion  135  protrudes into the communication hole  1231 , and a thickness of the bottom pressing block  123  is greater than a thickness of five sheets. As such, the bottom pressing block  123  can be welded to an outer wall of the connecting member  13  to ensure sealing during the welding of the core body member  12 . 
     The second end portion  135  of the connecting member  13  includes the welding section  1352  and the adjacent section  1351 , the welding section  1352  of the connecting member  13  is welded to the welding matching portion  125 , the adjacent section  1351  is adjacent to the welding section  1352 , the adjacent section  1351  is closer to the first end portion  134  than the welding section  1352 , the outer diameter of the welding section  1352  is less than or equal to the inner diameter of the welding matching portion  125 , and the outer diameter of the adjacent section  1351  is less than or equal to the inner diameter of the welding matching portion  125 . In a case that the core body member shrinks during the welding, since the connecting member has the welding section and the adjacent section, 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, the welding matching portion is movable relative to the connecting member during the welding shrinkage of the core body member, and thus the welding between the connecting member and the core body member has good sealing performance. In addition, the outer diameter of the adjacent section  1351  may be further greater than or equal to the outer diameter of the welding section  1352 , and the diameter of the welding section  1352  can be tapered relative to the adjacent section  1351 , which is more beneficial to the movement of the sheet portion relative to the connecting member  13  during the welding. 
     Referring to  FIG.  11   , it is a schematic cross-sectional view of another embodiment of the heat exchange apparatus. A general structure of the heat exchange apparatus can make reference to the heat exchange apparatus shown in  FIG.  10   . 
     The heat exchange apparatus includes a first blocking portion  1217 , the first conduit  1211  is separated by the blocking portion  1217 , the first conduit  1211  includes a first sub conduit  1211   a  located on one side of the first blocking portion  1217  and a second sub conduit  1211   b  located on another side of the first blocking portion  1217 , the peripheral opening  1113  is in communication with the first sub conduit  1211   a , and the first sub conduit  1211   a  is not in direct communication with the second sub conduit  1211   b.    
     The valve body member  12  includes a fifth sheet  1214   c , the fifth sheet  1214   c  includes the first blocking portion  1217 , and the first blocking portion  1217  is fixed to the outer wall of the connecting member  13  by welding. Providing that the side of the core body member  12  assembled with the valve core member  11  is taken as an upper side, the first blocking portion  1217  is located below the middle section  1112 . 
     The bottom section  1111  is located in the connecting member  13 , and the bottom section  1111  is arranged sealed to the connecting member  13 . Providing that the side of the core body member arranged with the valve core member is taken as the upper side along the extending direction of the first conduit, the first blocking portion  1217  is located below the peripheral opening  1113 . As such, the arrangement of the first blocking portion  1217  has less interference with the fluid flowing out from the peripheral opening  1113 . 
     The first conduit  1211  includes the first sub conduit  1211   a  and the second sub conduit  1211   b , and the first blocking portion  1217  is fixed to the outer wall of the connecting member  13  by welding so as to separate the first sub conduit  1211   a  from the second sub conduit  1211   b.    
     The valve body member  12  includes a sixth sheet  1215   c , the sixth sheet  1215   c  includes a second blocking portion  1218 , the second blocking portion  1218  is located at the second conduit  1213 , the second conduit  1213  includes a third sub conduit  1213   a  and a fourth sub conduit  1213   b , and the second blocking portion  1218  separates the third sub conduit  1213   a  from the fourth sub conduit  1213   b.    
     The inter-sheets passage  1212  includes a first route  1212   a , a second route  1212   b  and a third route  1212   c , a flow direction of the first route  1212   a  is opposite to a flow direction of the second route  1212   b , and the flow direction of the second route  1212   b  is opposite to a flow direction of the third route  1212   c . As such, the fluid flows in from the bottom opening  1115  after flowing into the connecting member  13  through the first communication passage  103 , and then flows in the first sub conduit  1211   a , the first route  1212   a , the third conduit  1213   a , the second route  1212   b , the second conduit  1211   b , the third route  1212   c  and the second communication passage  104  through the throttle hole  1114  and the peripheral opening  1113 . The throttling and depressurization to the fluid can be conducted after flowing into the heat exchange apparatus, and the fluid flowing in the inter-sheets passage  1212  from the peripheral opening  1113  can directly exchange heat with the fluid in the adjacent inter-sheets passage  1212 , and the throttling and heat exchange can be completed inside the core body member  12 , which is not only beneficial to the stability of phase state of the fluid, but also beneficial to improving the heat exchange efficiency. 
     Referring to  FIG.  15    for another heat exchange apparatus. Merely the differences from the  FIG.  11    are described here. The bottom pressing block  123  includes a second communication passage  104 , the second communication passage  104  is not in direct communication with the first communication passage  103 , and the second communication passage  104  is in communication with the second sub conduit  1211   b.    
     The inter-sheets passage includes a first route and a second route, and a flow direction of the first route is opposite to a flow direction of the second route. 
     When the valve core member is in an open state, the communication passage  103 , the communication cavity  138 , the bottom opening  1115 , the throttle hole  1114 , the peripheral opening  1113 , the first sub conduit  1211   a , the first route  1212   a , the second conduit  1213 , the second route  1212   b , the second conduit  1211   b  and the second communication passage  104  are in communication. In  FIG.  15   , the first communication passage  103  and the second communication passage  104  are both formed at positions of the bottom pressing block  123  corresponding to the first conduit  1211 , the first communication passage  103  shown in  FIG.  11    is formed in the bottom pressing block  123  corresponding to the first conduit  1211 , and the second communication passage  104  is formed in the bottom pressing block  123  corresponding to the second conduit  1213 . 
     Referring to  FIG.  16   , which is a schematic cross-sectional view of a heat exchange apparatus  1 . 
     A general structure of the heat exchange apparatus is similar to the structure shown in  FIG.  2   . The same reference numerals below represent the same or similar structures. 
     The heat exchange apparatus includes the first blocking portion  1217 , the first conduit  1211  is separated by the blocking portion  1217 , the first blocking portion  1217  shown in  FIG.  16    is a hemming structure arranged at a rear end of the first end portion of the connecting member  13 , and the first blocking portion  1217  is located below the peripheral opening  1113 . The first conduit  1211  includes the first sub conduit  1211   a  located on one side of the first blocking portion  1217  and the second sub conduit  1211   b  located on another side of the first blocking portion  1217 , the peripheral opening  1113  is in communication with the first sub conduit  1211   a , and the first sub conduit  1211   a  is not in direct communication with the second sub conduit  1211   b.    
     The valve body member  12  includes the fifth sheet  1214   c , a first blocking portion  1217  is formed by an extension of the connecting member  13 , and the first blocking portion  1217  extends along the radial direction of the connecting member  13 . The first blocking portion  1217  is fixed to the fifth sheet  1214   c  by welding. 
     The bottom section  1111  is located in the connecting member  13 , and the bottom section  1111  is arranged sealed to the connecting member  13 . Providing that the side of the core body member arranged with the valve core member is taken as the upper side along the extending direction of the first conduit, the first blocking portion  1217  is located below the peripheral opening  1113 . The connecting member  13  is arranged in the first conduit, and the connecting member  13  is located on the lower side of the peripheral opening  1113 , so that the interference of the fluid flowing out from the peripheral opening  1113  is small. 
     In addition, similar to  FIG.  15   , a first communication passage  103  and a second communication passage  104  are both formed at positions of the bottom pressing block  123  in  FIG.  16    corresponding to the first conduit  1211 . 
     It should be noted that, although the connecting member shown in the figures has an integrated structure, the present disclosure also includes a solution in which the connecting member has a separate structure. For example, the connecting member may include two portions fixed by a screw or by other position-limiting fit, or may include two portions or three portions arranged by welding. 
     It should be understood that, the first blocking portion may be integrally formed with the sheets or the connecting member, or may be welded to the sheets or the connecting member. 
     In this embodiment, the second end portion  135  of the connecting member  13  includes the welding section  1352  and the adjacent section  1351 , which can specifically refer to the embodiment shown in  FIG.  4   , and will not be detailed described herein. 
     Along the extending direction of the first conduit, a thickness of the welding matching portion is greater than a thickness of two stacked plates, or the thickness of the welding matching portion may be greater than the thickness of five stacked plates. 
     Referring to  FIG.  12   , it is a schematic cross-sectional view of the heat exchange apparatus. 
     The connecting member  13  includes an annular wall portion  131 , and the valve seat portion  111  is arranged sealed to the annular wall portion  131 . The height of the annular wall portion  131  is greater than the height of the bottom section  1111  along the stacking direction of the sheets of the core body member  12 . The first groove  1116  is provided in the bottom section  1111 , the heat exchange apparatus includes a first sealing member  14 , the first sealing member  14  is located in the first groove  1116 , and the first sealing member  14  is closely matched with the annular wall portion  131  to realize sealing between the first sealing member  14  and the annular wall portion  131 , which effectively avoids the leakage between the bottom section  1111  and the annular wall portion  131 . 
     In this embodiment, the connecting member  13  includes a flange portion  137 , and the flange portion  137  is arranged sealed to the core body member  12 ; the sheet portion  121  includes a protruding portion  1220 , the protruding portion  1220  protrudes away from the valve core member  11 , and the protruding portion  1220  is arranged opposite to the bottom pressing block  123 . The flange portion  137  is located between the sheet portion  121  and the bottom pressing block  123 . The flange portion  137  is located between the sheet portion  121  and the bottom pressing block  123 , which is not limited to that the flange portion  137  must be in contact with the sheet portion  121  and bottom pressing block  123 . Herein, it merely means that the flange portion  137  is just located between a partial structure of the sheet portion  121  and a partial structure of the bottom pressing block  123 . The protruding portion  1220  can position the bottom pressing block, which facilitates assembly. 
     The flange portion  137  is limited between the sheet portion  121  and the bottom pressing block  123 , which can be configured to determine the position of the connecting member  13  in the core body member  12  and to stabilize the sealing fit between the connecting member  13  and the bottom section  1111 , so as to facilitate the assembly of the connecting member  13  and the valve core member  11 . 
     The heat exchange apparatus includes the second sealing member  15 , such as in the form of a sealing gasket. The second sealing member  15  is located between the flange portion  137  and the sheet portion  121  and is configured to seal the first conduit  1211 . The bottom pressing block  123  includes a threaded hole  1233 , the bottom pressing block  123  and the sheet portion  121  can be fixed by a screw inserted into the threaded hole, and the sealing between the flange portion  137  and the sheet portion  121  can be fixed and pressed by the screw. In addition, the heat exchange apparatus may be provided with a third sealing member between the flange portion  137  and the bottom pressing block  123 , so that the sealing between the connecting member  13  and the core body member  12  is realized by axial sealing, which is beneficial to stabilizing the sealing of the heat exchange apparatus and has a simple processing. 
     Since the connecting member  13  is provided with sealing points at two portions, the sealing between the connecting member  13  and the valve seat portion  111  is realized by arranging the sealing member in the groove of the bottom section  1111 , so that the radial sealing between the bottom section  1111  and the inner wall of the connecting member  13  is realized. In that case, the inner wall of the connecting member  13  has certain roughness requirement, and additional processing is required on the inner wall of the connecting member  13  to ensure the matching required for sealing. 
     At the other sealing point of the connecting member  13 , the axial sealing between the flange portion  137  and the sheet portion  121  is realized by pressing the bottom pressing block  123  against the flange portion  137 . Since a sealing member is provided between the flange portion  137  and the sheet portion  121 , the flange portion  137  and the sheet portion  121  are sealed axially. In that case, the roughness requirement of a matching portion between the flange portion  137  and the sheet portion  121  is lower than the roughness requirement required for the radial sealing. Therefore, for the processing of the connecting member  13 , the key point is mainly on the matching between the inner wall of the connecting member  13  and the bottom section  1111 , and thus the processing considerations are less, and the processing is simple and easy to realize. 
     Referring to  FIG.  13   , which simply shows a matching mode of the connecting member  13  and the core body member  12 . In order to show the structure more clearly, some reference numerals of the following structures may not be shown in  FIG.  13   , which can make reference to  FIG.  12   . The matching mode between the connecting member  13  and the bottom section  1111  can refer to  FIG.  12   . The connecting member  13  includes the flange portion  137 , and the flange portion  137  is arranged sealed to the core body member  12 ; the flange portion  137  includes an upper portion  137   a  and a lower portion  137   b . Providing that a direction of a side of the core body member  12  assembled with the valve core member  11  is taken as above, a direction of another side of the core body member  12  is taken as a lower side. The upper portion  137   a  of the flange portion  1322  is fixed to one sheet of the sheet portion  121  by welding, and the lower portion  137   b  of the flange portion  1322  is fixed to another sheet of the sheet portion  121 . 
     In other embodiments, the core body member  12  includes the bottom pressing block  123 , the lower portion  137   b  of the flange portion  137  may be fixed to the bottom pressing block  123  by welding, which is shown in  FIG.  12    and  FIG.  13   . As such, the fluid flows into the first conduit  1211  through the communication cavity  138  of the connecting member  13 , the bottom opening  1115 , the throttle opening  1114  and the peripheral opening  1113  after it flows in from the communication passage  103  so as to exchange heat with the fluid in the adjacent inter-sheets passage  1212 . 
     A manufacturing method for the heat exchange apparatus shown in  FIG.  12    is provided according to the embodiment of the present disclosure, which includes:
         provide a sheet portion  121 , and put the stacked sheet portion  121  into a furnace for welding, in which the welded sheet portion  121  includes a first conduit  1211 , a second conduit  1213  and an inter-sheets passage  1212 ;   provide a valve core member  11  and a connecting member  13 , protrude a valve seat portion  111  of the valve core member  11  into the first conduit  1211  of the welded sheet portion  121 , in which the valve seat portion  111  includes the bottom section  1111  and the middle section  1112  and the middle section  1112  includes the peripheral opening; protrude part of the bottom section  1111  into the connecting member  13 , sealingly connect the bottom section  1111  with the connecting member  13  by providing the first sealing member  14 ; and   assemble and fix the valve core member  11  and the core body member  12 .       

     Furthermore, the manufacturing method further includes: provide a bottom pressing block  123 , protrude part of the connecting member  13  into the first conduit  1211 , arrange the flange portion  137  of the connecting member  13  between the bottom pressing block  123  and the sheet portion  121 , and sealingly connect the connecting member  13  with the sheet portion  121  by the sealing member;
         assemble and fix the bottom pressing block  123 , the connecting member  13  and the sheet portion  121 ; and   protrude the valve seat portion  111  of the valve core member  11  from a side opposite to the side of the core body member  11  assembled with and fixed to the connecting member  13  into the first conduit  1211  of the welded sheet portion  121 , in which the valve seat portion  111  includes the bottom section  1111  and the middle section  1112 , and the middle section  1112  includes the peripheral opening; protrude the bottom section  1111  into the connecting member  13 , and sealingly connect the bottom section  1111  with the connecting member  13  by providing the first sealing member  14 .       

     Through the manufacturing method, it does not need to weld the connecting member  13  to the core body member  12 , and the assembly process of the connecting member  13  and the valve core member  12  is arranged after the welding of the core body member  12 , which reduces the influence of various uncertain factors during the welding of the core body member  12  on the sealing between the connecting member  13  and the core body member  12 , the process is simple and the manufacturing method is simple. 
     Referring to  FIG.  14   , it is a schematic partial cross-sectional view of another heat exchange apparatus. In order to show the structure more clearly, some reference numerals of the following structures may not be shown in  FIG.  14   , which can make reference to  FIG.  12   . The matching mode between the connecting member  13  and the bottom section  1111  can refer to  FIG.  12   . 
     The core body member  12  includes the bottom pressing block  123 , and the bottom pressing block  123  is fixed to the sheet portion  121  by welding. The connecting member  13  includes the first end portion  134  and the second end portion  135 , the first end portion  134  of the connecting member  13  is arranged sealed to the bottom section  1111  (referring to  FIG.  12   ), the second end portion  135  of the connecting member  13  protrudes into the bottom pressing block  123 , the second end portion  135  of the connecting member  13  includes the second groove  1117 , the heat exchange apparatus includes the second sealing member  15 , and the second sealing member  15  is arranged in the second groove  1117  so as to seal the outer wall of the connecting member  13  to the inner wall of the bottom pressing block  123 . 
     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.