Heat exchange device

Abstract

The application discloses a heat exchange device, which comprises a valve core component, a core body component and a connecting piece. The connecting piece has a first end portion and a second end portion. The first end portion of the connecting piece is located in a first hole channel. The second end portion of the connecting piece has a welding section and an adjacent section. The core body component has a welding matching portion. The welding section of the connecting piece is welded with the welding matching portion. The adjacent section is adjacent to the welding section. The outer diameter of the welding section is less than or equal to the inner diameter of the welding matching portion. The outer diameter of the adjacent section is less than or equal to the inner diameter of the welding matching portion. The distance between the end of the welding matching portion, which is far away from the valve core component, and the end of the welding section, which is far away from the valve core component, is greater than or equal to zero. The heat exchange device has good sealing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat management, in particular to a heat exchange device. BACKGROUND

[0002] A heat management system can include a circuit with a refrigerant, in which a heat exchanger and an expansion valve are required, and the two components are generally connected in a pipe connection manner in the heat management system.

[0003] The components of the heat exchanger are fixed by welding, and the height of the heat exchanger can be shrunk after welding due to the melting of the welding material, etc. Therefore, in the integration of the heat exchanger and the expansion valve, the valve body of the expansion valve is fixed with the mounting plate of the heat exchanger. SUMMARY

[0004] The purpose of the present application is to provide a heat exchange device with good sealing performance.

[0005] To achieve the above purpose, the following technical solutions are adopted:

[0006] A heat exchange device includes a valve core component and a core body component, the valve core component and the core body component are fixedly arranged;

[0007] The core body component has a plate piece part, the plate piece part has a plurality of plate pieces, the plate piece part has at least a first hole, an inter-plate passage and a second hole, and the first hole, the inter-plate passage and the second hole are communicated;

[0008] The heat exchange device includes a connecting piece, the connecting piece has a first end and a second end, the first end of the connecting piece is located in the first hole, the second end of the connecting piece has a welding section and an adjacent section, the core body component has a welding matching part, the welding section of the connecting piece is welded with the welding matching part, the adjacent section is adjacent to the welding section, the outer diameter of the welding section is less than or equal to the inner diameter of the welding matching part, and the outer diameter of the adjacent section is less than or equal to the inner diameter of the welding matching part; the distance between the end of the welding matching part away from the valve core component and the end of the welding section away from the valve core component is greater than or equal to zero;

[0009] The valve core component has a valve seat part, the valve seat part has a bottom opening, a throttling hole and a peripheral opening, the throttling hole can communicate the peripheral opening and the bottom opening, and the peripheral opening is communicated with the part of the first hole outside the connecting piece; the connecting piece has a connecting passage, the bottom opening is communicated with the connecting passage of the connecting piece.

[0010] The above technical solution of the present application comprises a connecting piece, a welding section of the connecting piece is welded with the welding cooperation part, the adjacent section is adjacent to the welding section, the outer diameter of the welding section is less than or equal to the inner diameter of the welding cooperation part, and the outer diameter of the adjacent section is less than or equal to the inner diameter of the welding cooperation part; in this way, when the core component shrinks during the welding process, because the connecting piece has the welding section and the adjacent section, the distance between the end of the welding cooperation part away from the valve core component and the end of the welding section away from the valve core component is greater than or equal to zero; so that the welding cooperation part can relatively move relative to the connecting piece during the welding shrinkage process, and the welding sealing performance of the connecting piece and the core component is better. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 Structure schematic diagram of an embodiment of the heat exchange device;

[0012] Figure 2 Structure schematic diagram of an embodiment of the heat exchange device; Figure 1 Structure schematic diagram of an embodiment of the heat exchange device;

[0013] Figure 3 Structure schematic diagram of an embodiment of the heat exchange device; Figure 1 Structure schematic diagram of an embodiment of the heat exchange device;

[0014] Figure 4 Structure schematic diagram of an embodiment of the heat exchange device;

[0015] Figure 5 Structure schematic diagram of an embodiment of the heat exchange device; Figure 4 Structure schematic diagram of an embodiment of the heat exchange device;

[0016] Figure 6 Structure schematic diagram of an embodiment of the heat exchange device;

[0017] Figure 7 Structure schematic diagram of an embodiment of the heat exchange device. DETAILED DESCRIPTION

[0018] With reference to Figures 1-3 , Figure 1 The structure schematic diagram of the first heat exchange device 1 of the present application is shown.

[0019] The heat exchange device 1 at least comprises a first flow channel 101 and a second flow channel, the fluid in the first flow channel 101 can exchange heat with the fluid in the second flow channel; the fluid in the first flow channel 101 can be refrigerant, and the fluid in the second flow channel can be cooling liquid. The heat exchange device 1 can also have a third flow channel, a fourth flow channel, etc.

[0020] The heat exchange device 1 comprises a valve core component 11, a core body component 12, and a connecting component 13. The valve core component 11 and the core body component 12 are assembled and fixed. The connecting component 13 is fixed to the core body component 12, for example, by welding. The valve core component 11 can be a valve core structure of an expansion valve.

[0021] The core body component 12 comprises a top pressing block 122, a plate portion 121, and a bottom pressing block 123. The top pressing block 122, the plate portion 121, and the bottom pressing block 123 are fixed by welding. The plate portion 121 comprises at least a first hole 1211, a second hole 1213, and a plate interconnecting passage 1212. The first hole 1211, the plate interconnecting passage 1212, and the second hole 1213 are connected. The first flow channel 101 comprises the first hole 1211, the plate interconnecting passage 1212, and the second hole 1213.

[0022] In this context, the first hole 1211 and the second hole 1213 refer to the holes of the core body component 12 when the core body component 12 is not assembled with the valve core component 11. When the first hole 1211 and the second hole 1213 are assembled with the valve core component or the connecting component, even if there are components or parts inside other components, as long as the position of the components or parts is the first hole or the second hole of the core body component, this context refers to the components or parts being in the first hole or the second hole.

[0023] The plate portion 121 comprises a plurality of stacked plates. Adjacent plates are fixed by welding. Each plate comprises at least a first hole and a second hole. Along the stacking direction of the plates, the first holes of the plates are aligned, and the second holes of the plates are aligned. The first holes and the second holes are located at the adjacent edges of the plates. In this way, the fluid flowing through the plates can have a longer flow path, which helps to improve the heat exchange efficiency. The first holes of the plates are aligned to form part of the first hole 1211. The second holes of the plates are aligned to form part of the second hole 1213.

[0024] The top pressing block 122 comprises a third hole 1221, which is aligned with the first hole. The bottom pressing block 123 comprises a communication hole 1231, which is aligned with the first hole.

[0025] The heat exchange device 1 comprises a communication passage 103, which communicates with the connection passage 138 of the connecting member 13, and another communication passage 104, which can communicate with the second hole passage 1213. In this way, fluid can enter the communication passage 103, pass through the inner cavity of the connecting member 13, be throttled and regulated by the valve core component 11, enter the first hole passage, and then enter the inter-plate passage 1212 and the second flow passage of the core component 12 for heat exchange. The flow path is simple, and the heat exchange efficiency is high. Of course, in other cases, the other communication passage 104 can not directly communicate with the second hole passage 1213, for example, a pipe is arranged in the second hole passage 1213, and the other communication passage 104 communicates with the pipe. In other cases, the other communication passage 104 can not communicate with the inter-plate passage 1212 through the second hole passage 1213. The other communication passage 104 can be arranged on the side of the core component 12 where the communication passage 103 is arranged, and the other communication passage 104 can be adjacent to the communication passage 103 and not directly communicate with the communication passage 103.

[0026] The core component 12 has a first side 124 and a second side 126. At least part of the valve core component 11 is located on the first side 124, and the communication passage 138 is located on the second side 126, which communicates with the connection passage. For example, the valve core component 11 comprises a coil portion 1120, and the coil portion 1120 is located on the first side 124.

[0027] At least part of the valve core component 11 extends into the first hole passage 1211, and at least part of the connecting member 13 extends into the first hole passage 1211.

[0028] The valve core component 11 has a valve seat portion 111, at least part of the valve seat portion 111 is located in the first hole passage 1211, the valve seat portion 111 has a peripheral opening 1113, a throttling hole 1114, and a bottom opening 1115. The peripheral opening 1113 communicates with the first hole passage 1211 and the inter-plate passage 1212. The connecting member 13 has a connection passage 138, one end of the connecting member 13 is located in the first hole passage 1211, the bottom opening 1115 communicates with the connection passage 138 of the connecting member 13, and the connection passage 138 does not directly communicate with the first hole passage 1211. The valve core component 11 can be a valve core part of an electronic expansion valve. In this way, fluid can enter the inter-plate passage 1212 from the connection passage 138 of the connecting member 13 through the bottom opening 1115, the throttling hole 1114, the peripheral opening 1113, the first hole passage 1211, and then exchange heat with fluid between adjacent plates in the plate portion 121. The peripheral opening 1113 can directly communicate with the first hole passage 1211 or directly communicate with the inter-plate passage 1212.

[0029] In this document, the connection passage not directly communicating with the first hole passage does not exclude that the flow passage is connected through other components.

[0030] The connecting piece 13 has a ring wall portion 131, and the valve seat portion 111 is sealingly arranged with the ring wall portion 131, and the sealing form can be radial sealing or axial sealing, etc.

[0031] The valve seat portion 111 has a base section 1111 and a middle section 1112, the base section 1111 has a bottom opening 1115, the base section 1111 is located inside the connecting piece 13, and the peripheral side of the base section 1111 is sealingly arranged with the ring wall portion 131 of the connecting piece 13. The middle section 1112 has a peripheral opening 1113, and in the stacking direction of the core component 12, the middle section 1112 is closer to the first side 124 of the core component 12 relative to the base section 1111, and the middle section 1112 is located on the plate piece 121, and the peripheral opening 1113 is in communication with the inter-plate channel 1212. In this way, the valve core component 11 is assembled to the core component 12 to a greater depth, which helps to reduce the height of the valve core component 11 protruding from the core component 12, and helps to make the overall structure more compact. When the valve core component is in an open state, the communication channel, the connecting channel, the bottom opening, the throttling hole, the peripheral opening, the first hole, the inter-plate channel, and the second hole are in communication.

[0032] It should be noted that the base section and the middle section are only defined by name and are not limited in structure.

[0033] The connecting piece 13 has a valve seat matching portion 132 and a drainage pipe 133, and the valve seat portion 111 and the drainage pipe 133 are fixedly arranged, for example, by welding, or by other fixing methods such as riveting. The valve seat matching portion 132 is arranged with the ring wall portion 131, and in the stacking direction of the plate pieces of the core component 12, the height of the ring wall portion 131 is greater than the height of the base section 1111. The base section 1111 is provided with a first groove 1116, and the heat exchange device 1 has a first sealing member 14 located in the first groove 1116, and the first sealing member 14 is tightly matched with the ring wall portion 131 to achieve sealing between the two, so that leakage between the base section 1111 and the ring wall portion 131 is effectively prevented.

[0034] The valve seat matching portion 132 has a side hole 1321, and in the stacking direction of the plate pieces of the core component 12, the side hole 1321 is closer to the first side 124 of the core component 12 relative to the ring wall portion 131. The side hole 1321 corresponds to the peripheral opening 1113 of the valve core component 11. In this way, the fluid enters from the bottom opening 1115 of the valve core component 11 through the drainage pipe 133, enters the first hole 1211 through the throttling hole 1114, the peripheral opening 1113, and the side hole 1321, and enters the inter-plate channel 1212 in communication with the first hole 1211 and the second flow channel to exchange heat with the fluid.

[0035] The connecting piece 13 is welded with the core component 12, the core component 12 has a welding matching part 125, the welding matching part 125 is welded with the connecting piece 13, along the extension direction of the first hole 1211, the thickness of the welding matching part 125 is greater than the thickness of the two stacked plates; thus, in the welding shrinkage process of the core component 12, since the welding matching part 125 has a thickness greater than the thickness of the two stacked plates, the connecting piece 13 can be well welded with the welding matching part 125 during welding, which is conducive to the stability of the sealing.

[0036] The connecting piece 13 has a first end 134 and a second end 135, the first end 134 is located in the first hole 1211, the second end 135 of the connecting piece 13 has a welding section 1352 and an adjacent section 1351, the welding section 1352 of the connecting piece 13 is welded with the welding matching part 125, the adjacent section 1351 is adjacent to the welding section 1352, and the adjacent section 1351 is closer to the first end 134 relative to 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 part 125, and the outer diameter of the adjacent section 1351 is less than or equal to the inner diameter of the welding matching part 125; when the core component is in the welding shrinkage process, since the connecting piece has the welding section and the adjacent section, the distance between the end of the welding matching part away from the valve core component and the end of the welding section away from the valve core component is greater than or equal to zero; so that the welding matching part can relatively move relative to the connecting piece during the welding shrinkage process of the core component, and the welding sealing of the connecting piece and the core component is better. In addition, the outer diameter of the adjacent section 1351 can also be greater than or equal to the outer diameter of the welding section 1352, and the welding section 1352 can be relatively reduced in diameter relative to the adjacent section 1351, which is more conducive to the relative movement of the plate part relative to the connecting piece during welding.

[0037] The valve seat matching part 132 has a flange part 1322, which is welded with the core component 12. The plates of the core component 12 include a first plate 1214a and a second plate 1215a, the first plate 1214a is welded with the second plate 1215a, and the top or bottom of the flange part 1322 is welded with the first plate 1214a; or the top or bottom of the flange part 1322 is welded with the second plate 1215a.

[0038] The core member 12 has a top pressing block 122, a flange portion 1322 is welded and fixed with the top pressing block 122, and the valve seat portion 111 of the valve core member 11 extends into the third hole 1221 of the top pressing block 122. The valve seat matching portion 132 and the plate portion 121 can be limited and fixed by the flange portion 1322. During the welding process of the plate portion 121, the flange portion 1322 is welded and fixed with the top pressing block 122 of the core member 12, which can ensure the certainty of the position of the valve seat matching portion 132 in the core member 12, reduce the influence of the position of the valve seat matching portion 132 after the plate shrinkage, and reduce the risk of fluid leakage between the valve seat matching portion 132 and the valve seat.

[0039] The core member 12 has a bottom pressing block 123, a part of the connecting member 13 extends into the bottom pressing block 123, the bottom pressing block 123 has a welding matching portion 125, the welding section 1352 is located in the bottom pressing block 123, the welding section 1352 is located in the welding matching portion 125, the welding section 1352 is welded and fixed with the bottom pressing block 123, and the first end portion 134 is welded and fixed with the core member 12. In this way, the connecting member 13 can be welded and fixed with the core member during the welding process of the core member, and can be welded at one time, which is convenient for processing.

[0040] The valve seat matching portion 132 has a bottom end portion 1328, the drainage pipe 133 is welded and fixed with the bottom end portion 1328, and a part of the drainage pipe 133 extends into the valve seat matching portion 132; the drainage pipe 133 has a first portion 1331 and a second portion 1332, at least a part of the first portion 1331 extends into the valve seat matching portion 132, and at least a part of the first portion 1331 is welded and fixed with the valve seat matching portion 132. The second end portion of the connecting member 13 is arranged at the second portion of the drainage pipe 133, and a part of the second portion 1332 of the drainage pipe 133 is located in the welding matching portion 125 and is welded and fixed with the welding matching portion 125.

[0041] The bottom pressing block 123 has a protrusion 1232 extending into the first hole 1211, the protrusion 1232 has a communication hole 1231 communicating with the first hole 1211, the welding matching portion 125 is arranged on the inner wall of the protrusion 1232, the welding section extends into the communication hole 1231 of the protrusion 1232, and the outer wall of the protrusion 1232 is welded and fixed with the plate portion 121.

[0042] The drain pipe 133 has an expanded portion 1333 which does not extend into the valve seat matching portion 132, and the expanded portion 1333 is matched with the bottom end portion 1328 of the valve seat matching portion 132 to limit the extension. In this way, when the core component 12 is welded, the plate portion 121 will shrink, and the expanded portion 1333 is arranged to prevent the drain pipe 133 from moving upwards to the valve seat matching portion 132, so that the position of the drain pipe 133 extending into the valve seat matching portion 132 is determined, and the risk of the drain pipe 133 extending too deep into the valve seat matching portion 132 to cause the sealing fit between the base section 1111 and the connecting piece 13 is reduced, and the influence on the flow passage between the base section 1111 and the drain pipe 133 is reduced.

[0043] Furthermore, the flange portion 1322 has a limiting groove 1323, and the first plate 1214a has a limiting protrusion (not shown), and the limiting groove 1323 is matched with the limiting protrusion to prevent the connecting piece 13 from moving in the circumferential direction, which helps to stabilize the structure and the sealing.

[0044] Referring to Figure 4 , Figure 5 , Figure 4 , Figure 5 a structure of the heat exchange device 2 is shown. Figure 4 Some reference numerals in the above embodiments are not indicated in the following description, but the same parts are also marked in the above embodiments for the convenience of understanding and to avoid repeated redundancy. Figure 4 The heat exchange device 2 at least includes a first flow passage 101 and a second flow passage, and the fluid in the first flow passage 101 can exchange heat with the fluid in the second flow passage; the fluid in the first flow passage 101 can be refrigerant, and the fluid in the second flow passage can be coolant. The heat exchange device can also have a third flow passage, a fourth flow passage, etc.

[0045] The heat exchange device 2 includes a valve core component 11, a core component 12, and a connecting piece 13, the valve core component 11 and the core component 12 are assembled and fixed, and the connecting piece 13 is fixedly arranged with the core component 12, for example, welded. The valve core component 11 can be a valve core structure of an expansion valve, for example.

[0046] The core component 12 has a top pressing block 122, a plate portion 121, and a bottom pressing block 123, which are welded and fixed. The plate portion 121 at least has a first hole passage 1211, a second hole passage 1213, and a plate interpassage 1212, which are communicated, and the first flow passage 101 includes part of the first hole passage 1211, the second hole passage 1213, and the plate interpassage 1212. The first hole passage 1211 and the second hole passage 1213 are hole passages when the core component 12 is not assembled with the valve core component 11.

[0047] At least part of the valve core component 11 extends into the first hole 1211, and at least part of the connecting component 13 extends into the first hole 1211.

[0048] The core component 12 has a plurality of stacked plates, adjacent plates are fixed by welding, each plate has at least a first hole and a second hole, along the stacking direction of the plates, the first holes of the plates are arranged in alignment, and the second holes of the plates are arranged in alignment. The first hole and the second hole are located at the adjacent edges of the plates, so that the fluid flowing through the plates can have a longer flow path, which helps to improve the heat exchange efficiency. The first holes of the plates are aligned to form part of the first hole 1211, and the second holes of the plates are aligned to form part of the second hole 1213.

[0049] The top pressing block 122 has a third hole 1221 aligned with the first hole, and the bottom pressing block 123 has a communication hole 1231 aligned with the first hole.

[0050] The heat exchange device 2 includes a communication passage 103 and another communication passage 104, the communication passage 103 communicates with the connecting passage 138 of the connecting component 13, and the other communication passage 104 can communicate with the second hole 1213. In this way, the fluid can enter the communication passage 103, pass through the connecting passage 138 of the connecting component 13, be throttled and adjusted by the valve core component 11, and then enter the inter-plate passage 1212 and the second flow passage of the core component 12 for heat exchange, so that the flow path is simple and the heat exchange efficiency is high. Of course, in other cases, the other communication passage 104 can not directly communicate with the second hole 1213, for example, a pipe is arranged in the second hole 1213, and the other communication passage 104 communicates with the pipe. In other cases, the other communication passage 104 can not communicate with the inter-plate passage 1212 through the second hole 1213, and the other communication passage 104 can be arranged on the side of the core component 12 where the communication passage 103 is arranged, and the other communication passage 104 can be adjacent to the communication passage 103 and not directly communicate with the communication passage 103.

[0051] The core member 12 has a third plate 1214b and a fourth plate 1215b, the third plate 1214b and the fourth plate 1215b are welded and fixed, the third plate 1214b has a first ring protrusion 1219a, the fourth plate 1215b has a second ring protrusion 1219b, the first ring protrusion 1219a is provided with a first hole, the second ring protrusion 1219b is provided with a first hole, the first hole channel 1211 penetrates the first ring protrusion 1219a and the second ring protrusion 1219b, the first ring protrusion 1219a extends into the first hole of the plate adjacent to the third plate 1214b, the second ring protrusion 1219b extends into the first hole of the plate adjacent to the fourth plate 1215b, a gap is left between the first ring protrusion 1219a and the wall part of the plate provided with the first hole adjacent to the third plate 1214b, a gap is left between the second ring protrusion 1219b and the wall part of the plate provided with the first hole adjacent to the fourth plate 1215b, in this way, the fluid can flow around the outer periphery of the first ring protrusion 1219a and enter the inter-plate passage 1212 for heat exchange.

[0052] The valve core member 11 has a valve seat part 111, at least part of the valve seat part 111 is located in the first hole channel 1211, the valve seat part 111 has a peripheral opening 1113, a throttling hole 1114 and a bottom opening 1115, the peripheral opening 1113 communicates with the first hole channel 1211, and the bottom opening 1115 communicates with the connecting channel 138 of the connecting member 13. The valve core member 11 can be a valve core part of an electronic expansion valve.

[0053] The valve seat part 111 has a base section 1111 and a middle section 1112, the base section 1111 has the bottom opening 1115, and the middle section 1112 has the peripheral opening 1113, in the stacking direction of the core member 12, the middle section 1112 is closer to the first side 124 of the core member 12 than the base section 1111. The middle section 1112 is located in the first hole channel 1211, in this way, the depth of the valve core member 11 assembled to the core member 12 is deep, which helps to reduce the height of the valve core member 11 protruding from the core member 12, and helps to make the overall structure more compact.

[0054] At least part of the valve seat part 111 extends into the first ring protrusion 1219a, and the base section 1111 is sealingly arranged with the first ring protrusion 1219a; the base section 1111 is provided with a first groove 1116, the heat exchange device has a first sealing member 14, the first sealing member 14 is located in the first groove 1116, and the first sealing member 14 tightly matches with the first ring protrusion 1219a to realize the sealing of the two, in this way, the leakage between the base section 1111 and the first ring protrusion 1219a is effectively prevented.

[0055] With the core component 12 arranged on one side of the valve core component 11, the middle section 1112 is located above the connecting piece 13; after the fluid enters from the bottom opening 1115, it flows out from the peripheral opening 1113 through the throttling hole 1114, so that the fluid just entering the core component 12 exits from the peripheral opening 1113 after the throttling pressure reduction of the expansion valve, and enters the inter-plate channel 1212 to exchange heat with the fluid of the second flow passage. The throttling pressure reduction of the refrigerant is completed inside the core component 12, which is very smooth in connection with the subsequent heat exchange link, and reduces the influence of the heat exchange efficiency of the subsequent heat exchange due to the factors such as gas-liquid stratification of the throttling pressure reduced refrigerant in the long pipeline caused by the pipeline setting.

[0056] The connecting piece 13 has a first end portion 134 and a second end portion 135, at least part of the first end portion 134 is welded and fixed with the second ring protruding portion 1219b. Specifically, at least part of the first end portion 134 extends into the second ring protruding portion 1219b, and at least part of the outer wall of the first end portion 134 is welded and fixed with the inner wall of the second ring protruding portion 1219b. When welding, for example, a welding ring can be provided.

[0057] At least part of the second end portion 135 is welded and fixed with the bottom pressing block 123, and at least part of the second end portion 135 extends into the position where the first hole of the bottom pressing block 123 is arranged.

[0058] The first end portion 134 has a first section 1341 and a second section 1342, the first section 1341 of the first end portion 134 extends into the second ring protruding portion 1219b, and the second section 1342 does not extend into the second ring protruding portion 1219b. The outer diameter of the second section 1342 is greater than that of the first section 1341, and the outer diameter of the second section 1342 is greater than the inner diameter of the second ring protruding portion 1219b, for example, the outer diameter of the second section 1342 can be reduced towards the first section 1341. In this way, when the stacked plates are put into the furnace for welding, the plates will shrink, causing the height of the stacked core component 12 to decrease. At this time, through the arrangement of the second section 1342, the first end portion 134 of the connecting piece 13 is difficult to extend into the bottom opening 1115 of the base section 1111 during the plate shrinking process, reducing the influence of the height change of the connecting piece 13 during the welding process of the core component 12 on the base section 1111, which helps to improve the cooperation between the valve core component 11 and the core component 12, and also helps to improve the sealing between the fluid valve core component 11 and the core component 12.

[0059] In addition, the second end 135 of the connecting piece 13 has a welding section 1352 and an adjacent section 1351, the welding section 1352 of the connecting piece 13 is welded with the welding matching part 125, the adjacent section 1351 is adjacent to the welding section 1352 and is close to the first end 134 relative to 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 part 125, and the outer diameter of the adjacent section 1351 is less than or equal to the inner diameter of the welding matching part 125; when the core component is in the shrinkage state in the welding process, because the connecting piece has the welding section and the adjacent section, the distance between the end of the welding matching part away from the core component and the end of the welding section away from the core component is greater than or equal to zero; so that the welding matching part can relatively move relative to the connecting piece in the welding shrinkage process, and the welding sealing property of the connecting piece and the core component is better. In addition, the outer diameter of the adjacent section 1351 can also be greater than or equal to the outer diameter of the welding section 1352, and the welding section 1352 can be relatively reduced in diameter relative to the adjacent section 1351, which is more conducive to the relative movement of the plate part relative to the connecting piece in the welding process.

[0060] The welding section 1352 can also have a first section and a second section, the first section is welded with the welding matching part 125, the second section is adjacent to the first section and is away from the first end relative to the first section, and the outer diameter of the second section is less than or equal to the inner diameter of the first section; the first section can not be arranged corresponding to the welding matching part 125 when the connecting piece 13 is assembled into the core component 12, and the first section moves to the welding matching part 125 and is welded and fixed with the welding matching part 125 when the core component shrinks.

[0061] Referring to Figure 6 , Figure 6 a structural cross-sectional view of the heat exchange device is shown. In order to more clearly show the structure, some of the structure in the following drawings can not be shown in Figure 6 , but can be referred to Figure 2 and Figure 3 . Figure 6 Although some of the above-mentioned reference numerals are not indicated in the following text, in order to facilitate understanding and avoid repeated and tedious descriptions, the reference numerals of the same parts in the above-mentioned embodiments will also be marked in Figure 6 .

[0062] The heat exchange device at least includes a first flow channel 101 and a second flow channel, the fluid in the first flow channel 101 can exchange heat with the fluid in the second flow channel; the fluid in the first flow channel 101 can be refrigerant, and the fluid in the second flow channel can be cooling liquid. The heat exchange device can also have a third flow channel, a fourth flow channel, etc.

[0063] The heat exchange device 1 comprises a valve core component 11, a core body component 12, and a connecting piece 13. The valve core component 11 and the core body component 12 are assembled and fixed, and the connecting piece 13 is fixedly arranged with the core body component 12, for example, by welding. The valve core component 11 can be a valve core structure of an expansion valve.

[0064] The core body component 12 has a top pressing block 122, a plate portion 121, and a bottom pressing block 123, which are fixed by welding. The plate portion 121 has at least a first hole channel 1211, a second hole channel 1213, and a plate interchannel 1212, which are communicated. The first flow channel 101 comprises the first hole channel 1211, the second hole channel 1213, and the plate interchannel 1212. The first hole channel 1211 and the second hole channel 1213 are hole channels of the core body component 12 when the valve core component 11 is not assembled.

[0065] The plate portion 121 has a plurality of stacked plates, which are fixed by welding. Each plate has at least a first hole and a second hole. In the stacking direction of the plates, the first holes of the plates are arranged in alignment, and the second holes of the plates are arranged in alignment. The first holes and the second holes are located at adjacent edge positions of the plates, so that the fluid flowing through the plates can have a longer flow route, which helps to improve the heat exchange efficiency. The first holes of the plates are arranged in alignment to form part of the first hole channel 1211, and the second holes of the plates are arranged in alignment to form part of the second hole channel 1213.

[0066] The top pressing block 122 has a third hole 1221, which is aligned with the first hole, and the bottom pressing block 123 has a communication hole 1231, which is aligned with the first hole.

[0067] The heat exchange device comprises a communication channel 103 and another communication channel 104. The communication channel 103 is communicated with the connection channel 138 of the connecting piece 13, and the another communication channel 104 can be communicated with the second hole channel 1213. In this way, the fluid can enter from the communication channel 103, pass through the inner cavity of the connecting piece 13, be throttled and adjusted by the valve core component 11, and then enter the plate interchannel 1212 and the second flow channel of the core body component 12 for heat exchange. The flow path is simple, and the heat exchange efficiency is high. Of course, in other cases, the another communication channel 104 can not be directly communicated with the second hole channel 1213, for example, a pipe is arranged in the second hole channel 1213, and the another communication channel 104 is communicated with the pipe. In other cases, the another communication channel 104 can not be communicated with the plate interchannel 1212 through the second hole channel 1213. The another communication channel 104 can be arranged on one side of the core body component 12 where the communication channel 103 is arranged. The another communication channel 104 can be adjacent to the communication channel 103 and not directly communicated with the communication channel 103.

[0068] At least part of the valve core component 11 extends into the first channel 1211, and at least part of the connecting piece 13 extends into the first channel 1211.

[0069] The valve core component 11 has a valve seat part 111, at least part of the valve seat part 111 is located in the first channel 1211, the valve seat part 111 has a peripheral opening 1113, a throttling hole 1114 and a bottom opening 1115, the peripheral opening 1113 is in communication with the first channel 1211, and the bottom opening 1115 is in communication with the connecting channel 138 of the connecting piece 13. The valve core component 11 can be a valve core part of an electronic expansion valve.

[0070] The valve seat part 111 has a base section 1111 and a middle section 1112, the base section 1111 has the bottom opening 1115, the base section 1111 is located inside the connecting piece 13, and the peripheral side of the base section 1111 is sealingly arranged with the annular wall part 131 of the connecting piece 13. The middle section 1112 has the peripheral opening 1113, and in the stacking direction of the core body component 12, the middle section 1112 is closer to the first side 124 of the core body component 12 relative to the base section 1111, and the middle section 1112 is located in the plate part 121, and the peripheral opening 1113 is in communication with the inter-plate channel 1212. In this way, the valve core component 11 is assembled to the core body component 12 to a greater depth, which helps to reduce the height of the valve core component 11 protruding from the core body component 12, and helps to make the overall structure more compact.

[0071] The connecting piece 13 has an annular wall part 131, and the valve seat part 111 is sealingly arranged with the annular wall part 131. In the stacking direction of the plate parts of the core body component 12, the height of the annular wall part 131 is greater than the height of the base section 1111. The base section 1111 is provided with a first groove 1116, and the heat exchange device has a first sealing member 14 located in the first groove 1116, and the first sealing member 14 tightly cooperates with the annular wall part 131 to achieve sealing therebetween, so that leakage between the base section 1111 and the annular wall part 131 is effectively prevented.

[0072] The connecting piece 13 has a side hole 1321, and in the stacking direction of the plate parts of the core body component 12, the side hole 1321 is closer to the first side 124 of the core body component 12 relative to the annular wall part 131. The side hole 1321 corresponds to the peripheral opening 1113 of the valve core component 11. In this way, fluid enters from the bottom opening 1115 of the valve core component 11 through the drainage pipe 133, enters the first channel 1211 through the throttling hole 1114, the peripheral opening 1113 and the side hole 1321, and enters the inter-plate channel 1212 and the second flow channel in communication with the first channel 1211 to exchange heat with the fluid therein.

[0073] The connecting member 13 has a flange portion 1322 welded with the core member 12. The core member 12 has a first plate 1214a and a second plate 1215a welded together, and the top or bottom of the flange portion 1322 is welded with the first plate 1214a or the second plate 1215a.

[0074] The core member 12 has a top pressing block 122, and the flange portion 1322 is welded with the top pressing block 122. The flange portion 1322 can limit the position of the connecting member 13 and the plate portion 121. During the welding process of the plate portion 121, the flange portion 1322 is welded with the top pressing block 122 of the core member 12, which can ensure the certainty of the position of the connecting member 13 in the core member 12, reduce the influence of the plate shrinkage on the position of the connecting member 13, and reduce the risk of fluid leakage between the connecting member 13 and the valve seat portion 111.

[0075] The core member 12 has a bottom pressing block 123, and a part of the connecting member 13 extends into the bottom pressing block 123. The bottom pressing block 123 has a welding fitting portion 125, and the second end portion 135 extends into the welding fitting portion 125 and is welded with the bottom pressing block 123.

[0076] The bottom pressing block 123 has a communication hole 1231 communicating with the first hole 1211, and the welding fitting portion 125 is arranged on the inner wall of the bottom pressing block 123 where the communication hole 1231 is arranged. A part of the second end portion 135 extends into the communication hole 1231, and the thickness of the bottom pressing block 123 is greater than the thickness of five plates. In this way, during the welding process of the core member 12, the bottom pressing block 123 can be welded with the outer wall of the connecting member 13 to ensure the sealing.

[0077] The second end 135 of the connecting member 13 has a welding section 1352 and an adjacent section 1351, the welding section 1352 of the connecting member 13 is welded with the welding matching part 125, the adjacent section 1351 is adjacent to the welding section 1352 and is close to the first end 134 relative to 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 part 125, and the outer diameter of the adjacent section 1351 is less than or equal to the inner diameter of the welding matching part 125; when the core member is in the shrinkage condition in the welding process, the distance between the end of the welding matching part away from the core member and the end of the welding section away from the core member is greater than or equal to zero due to the welding section and the adjacent section of the connecting member; so that the welding matching part can relatively move relative to the connecting member in the welding shrinkage process, and the welding sealing of the connecting member and the core member is good. In addition, the outer diameter of the adjacent section 1351 can also be greater than or equal to the outer diameter of the welding section 1352, and the welding section 1352 can be relatively reduced in diameter relative to the adjacent section 1351, which is more conducive to the relative movement of the plate part relative to the connecting member in the welding process.

[0078] With reference to Figure 7 , Figure 7 a cross-sectional view showing another embodiment of a heat exchange device. The general structure of the heat exchange device is similar to the heat exchange device shown in Figure 6 , Figure 7 Some reference numerals in the above embodiment are not indicated in the following text, but for the sake of understanding and to avoid repetition and redundancy, the reference numerals of the same parts in the above embodiment are also marked in Figure 7 . The core member 12 has a fifth plate 1214c, and the fifth plate 1214c has an extension 1217 welded and fixed to the outer wall of the connecting member 13, and the extension 1217 is located below the middle section 1112 when the core member 12 is assembled with the core member 11.

[0079] The first hole 1211 has a first sub-hole 1211a and a second sub-hole 1211b, and the extension 1217 welded and fixed to the outer wall of the connecting member 13 separates the first sub-hole 1211a and the second sub-hole 1211b.

[0080] The core member 12 has a sixth plate 1215c, and the sixth plate 1215c has a blocking part 1218 located at the position of the second hole 1213, and the second hole 1213 includes a third sub-hole 1213a and a fourth sub-hole 1213b, and the blocking part 1218 separates the third sub-hole 1213a and the fourth sub-hole 1213b.

[0081] The inter-plate passage 1212 has a first route 1212a, a second route 1212b and a third route 1212c, wherein the first route 1212a and the second route 1212b are opposite in flow direction, and the second route 1212b and the third route 1212c are opposite in flow direction; in this way, after the fluid enters the connecting piece 13 through the communication passage 103, it enters from the bottom opening 1115, passes through the throttling hole 1114, the peripheral opening 1113, the first sub-passage 1211a, the first route 1212a, the third sub-passage 1213a, the second route 1212b, the second sub-passage 1211b, the third route 1212c, and the other communication passage 104. After the fluid enters the heat exchange device, not only can it achieve throttling and pressure reduction, but also the fluid entering the inter-plate passage 1212 from the peripheral opening 1113 can directly exchange heat with the fluid in the adjacent inter-plate passage 1212. Both throttling and heat exchange can be completed inside the core component 12, which is conducive to the stability of the phase of the fluid and the improvement of the heat exchange efficiency.

[0082] The second end portion 135 of the connecting piece 13 has a welding segment 1352 and an adjacent segment 1351, the welding segment 1352 of the connecting piece 13 is welded with the welding matching portion 125, the adjacent segment 1351 is adjacent to the welding segment 1352 and is closer to the first end portion 134 relative to the welding segment 1352, the outer diameter of the welding segment 1352 is less than or equal to the inner diameter of the welding matching portion 125, and the outer diameter of the adjacent segment 1351 is less than or equal to the inner diameter of the welding matching portion 125; when the core component shrinks during the welding process, because the connecting piece has the welding segment and the adjacent segment, the distance between the end of the welding matching portion away from the core component and the end of the welding segment away from the core component is greater than or equal to zero; so that the welding matching portion can relatively move relative to the connecting piece during the welding shrinkage process, and the welding sealing performance of the connecting piece and the core component is good. In addition, the outer diameter of the adjacent segment 1351 can also be greater than or equal to the outer diameter of the welding segment 1352, and the welding segment 1352 can be relatively reduced in diameter relative to the adjacent segment 1351, which is more conducive to the relative movement of the plate portion relative to the connecting piece during the welding process.

[0083] Along the extension direction of the first passage, the thickness of the welding matching portion is greater than the thickness of the superposition of at least two plate pieces; the thickness of the welding matching portion can also be greater than the thickness of the superposition of 5 plate pieces.

[0084] The welding section 1352 can also have a first section welded to the welding fitting 125 and a second section adjacent to the first section and distal to the first end relative to the first section, the second section having an outer diameter less than or equal to an inner diameter of the first section; the first section can not be positioned in correspondence with the welding fitting 125 when the connector 13 is fitted into the core member 12, and the first section moves towards the welding fitting 125 and is welded to the welding fitting 125 when the core member is contracted.

[0085] It should be noted that the above is only illustrative, the extension 1217 can be integrally stamped with the fifth plate or welded to the fifth plate. Of course, as other embodiments, the connector can also integrally protrude the extension or be welded with the extension.

[0086] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. For example, the directions such as "front", "rear", "left", "right", "up", "down" and the like are defined. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still combine, modify or replace the present application, and all technical solutions and improvements which do not deviate from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A heat exchange device, comprising a valve core component and a core component, wherein the valve core component and the core component are fixedly disposed thereon; characterized in that: The core component has a plate portion, the plate portion has multiple plates, and the plate portion has at least a first channel, a second channel, and an inter-plate channel, the first channel, the inter-plate channel, and the second channel are connected. The heat exchange device includes a connector having a first end and a second end. The first end of the connector is located in the first channel, and the second end of the connector has a welded section and an adjacent section. The core component has a welded mating portion. The welded section of the connector is welded to the welded mating portion, and the adjacent section is adjacent to the welded section. The outer diameter of the welded section is less than or equal to the inner diameter of the welded mating portion, and the outer diameter of the adjacent section is less than or equal to the inner diameter of the welded mating portion. The distance between the end of the welded mating portion away from the valve core component and the end of the welded section away from the valve core component is greater than or equal to zero. The valve core component has a valve seat portion, which has a bottom opening, a throttling orifice, and a peripheral opening. The throttling orifice connects the peripheral opening and the bottom opening, and the peripheral opening connects to the portion of the first channel located outside the connector. The connector has a connecting channel, and the bottom opening connects to the connecting channel of the connector.

2. The heat exchange device according to claim 1, characterized in that: Along the extension direction of the first channel, the thickness of the welded joint is greater than the thickness of at least two plates stacked together; The core component has a bottom pressure block, the bottom pressure block has the welding mating part, the welding section of the connector is located on the bottom pressure block, the first end is welded and fixed to the core component, and the welding section is welded and fixed to the bottom pressure block.

3. The heat exchange device according to claim 2, characterized in that: The bottom pressure block has a protrusion that extends into a first channel and has a connecting hole that communicates with the first channel. The welding mating part is disposed on the inner wall of the protrusion, the second end extends into the connecting hole of the protrusion, and the outer wall of the protrusion is welded and fixed to the plate part.

4. The heat exchange device according to claim 2, characterized in that: The bottom pressure block has a connecting hole that communicates with the first channel. The welded mating part is disposed on the inner wall of the bottom pressure block where the connecting hole is disposed. The second end extends into the connecting hole. The thickness of the welded mating part is greater than the thickness of 5 plates.

5. The heat exchange device according to any one of claims 1-4, characterized in that: The connector has a flange portion that protrudes in the radial direction of the connector; The plate portion has a first plate and a second plate, the first plate and the second plate are welded and fixed together, and the top or bottom of the flange portion is welded and fixed together with the first plate; or the top or bottom of the flange portion is welded and fixed together with the second plate. And / or the core component has a top pressure block, and the flange is welded and fixed to the top pressure block.

6. The heat exchange device according to claim 1, characterized in that: The core component has a first side and a second side, at least a portion of the valve core component is located on the first side, the heat exchange device has a connecting channel located on the second side, the connecting channel is connected to the connecting channel, and the connecting channel is not directly connected to the first channel; At least a portion of the valve seat extends into the first end, and the outer diameter of the adjacent segment is greater than or equal to the outer diameter of the welded segment.

7. The heat exchange device according to any one of claims 1-6, characterized in that: The connector has a valve seat mating part and a drain tube, and the valve seat mating part is sealed to the valve seat part. The valve seat mating part has a bottom end, the drain tube is welded and fixed to the bottom end, and a portion of the drain tube extends into the valve seat mating part; The drainage tube has an outward expansion portion, which does not extend into the valve seat mating portion, and the outward expansion portion is mated and restricted with the bottom end of the valve seat mating portion.

8. The heat exchange device according to claim 7, characterized in that: The valve seat portion has a base section and a middle section. The base section has a bottom opening, the middle section has a peripheral opening, and the valve seat mating portion has an annular wall portion. The base section and the annular wall portion are sealed together. The valve seat mating part is provided with a side hole corresponding to the peripheral opening. In the plate stacking direction of the core component, the side hole is closer to the first side of the core component than the annular wall portion.

9. The heat exchange device according to claim 1, characterized in that: The connector is in the form of a drainage tube; The plate portion has a third plate and a fourth plate, which are welded and fixed together. The third plate has a first annular protrusion, and the fourth plate has a second annular protrusion. At least a portion of the valve seat portion extends into the first annular protrusion. The valve seat portion has a base section with the bottom opening, and the base section is sealed to the first annular protrusion. The first end of the connector extends into the second annular protrusion, and the second annular protrusion is welded and fixed to the connector.

10. The heat exchange device according to claim 9, characterized in that: The valve seat portion has a base section and a middle section. The base section has the bottom opening, and the middle section has the peripheral opening. The middle section is located above the connector with the side of the valve core component on which the core component is disposed. At least a portion of the first end of the connector is welded and fixed to the second annular protrusion, and the second end is welded and fixed to the core component; The first end has a first segment and a second segment. The first segment of the first end extends into the second annular protrusion, while the second segment does not extend into the second annular protrusion. The outer diameter of the second segment is larger than that of the first segment, and the outer diameter of the second segment is larger than that of the inner diameter of the second annular protrusion.

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