Heat exchange device

Abstract

The application discloses a heat exchange device, which comprises a valve core component and a core body component. The valve core component has a valve seat part, at least part of the valve seat part is located in a first hole channel, the valve seat part has a base section and a middle section, the base section has a bottom opening, the middle section has a circumferential opening, the valve seat part has a throttle hole, the throttle hole can communicate the circumferential opening and the bottom opening, the middle section is located in a plate section, and the circumferential opening communicates with a plate interchannel. The heat exchange device comprises a connecting piece, at least part of the connecting piece extends into the first hole channel, the bottom opening communicates with a connecting channel, and the heat exchange device comprises a communication channel, which communicates with the connecting channel. The heat exchange device has a small structure.

Description

TECHNICAL FIELD

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

[0002] In a heat management system, a heat exchanger and an expansion valve are included, and the two components are connected in a heat management system in a way of pipeline connection.

[0003] There is also an integrated heat exchanger and expansion valve, and the valve body of the expansion valve is fixed with the heat exchanger, so that the overall structure is compact. However, a part of the connecting pipe is still connected with the valve body of the expansion valve. SUMMARY

[0004] The purpose of the present application is to provide a heat exchange device with small structure.

[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 part, the plate part has at least a first hole, a second hole and a plate interpass channel, the first hole, the plate interpass channel and the second hole are communicated;

[0008] The valve core component has a valve seat part, the valve seat part has a base section and a middle section, the base section has a bottom opening, the middle section has a peripheral opening, the valve seat part has a throttling hole, the throttling hole can communicate the peripheral opening and the bottom opening, the middle section and the base section extend into the first hole, and the peripheral opening is communicated with the first hole;

[0009] The heat exchange device includes a connecting piece, the connecting piece has a connecting channel, the connecting piece has a first end part, the first end part of the connecting piece is located in the first hole, the bottom opening of the base section is communicated with the connecting channel, and the connecting channel is not directly communicated with the part of the first hole between the outer wall of the connecting piece and the plate part;

[0010] The core body component has a first side part and a second side part, at least part of the valve core component is located in the first side part, the heat exchange device has a communication channel, the communication channel is located in the second side part, and the communication channel is communicated with the connecting channel.

[0011] The base section and the middle section of the technical solution of the present application extend into the first hole, the base section of the valve seat part has a bottom opening, the middle section has a peripheral opening, the peripheral opening is communicated with the first hole, the bottom opening is communicated with the connecting channel, the connecting channel of the heat exchange device is communicated with the connecting channel, thus the heat exchange device is small in structure, and if it is necessary to connect the external pipe, the installation of the external pipe is also relatively simple. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 Structure diagram of the first embodiment of the heat exchange device;

[0013] Figure 2 Sectional view of the heat exchange device; Figure 1

[0014] Figure 3 Perspective exploded view of the heat exchange device; Figure 1

[0015] Figure 4 Sectional view of the second embodiment of the heat exchange device;

[0016] Figure 5 Perspective exploded view of the heat exchange device shown in; Figure 4

[0017] Sectional view of the third embodiment of the heat exchange device; Figure 6

[0018] Figure 7 Perspective exploded view of the heat exchange device shown in; Figure 6

[0019] Figure 8 Sectional view of the fourth embodiment of the heat exchange device, wherein the structure of the plate part is omitted;

[0020] Figure 9 Sectional view of the fifth embodiment of the heat exchange device, wherein the structure of the plate part is omitted;

[0021] Figure 10 Sectional view of the sixth embodiment of the heat exchange device;

[0022] Figure 11 Sectional view of the seventh embodiment of the heat exchange device;

[0023] Figure 12 Sectional view of the eighth embodiment of the heat exchange device;

[0024] Figure 13 Sectional view of the ninth embodiment of the heat exchange device, wherein the cooperation mode of the connecting piece and the plate part is shown;​​​​

[0025] Figure 14 Figure 10 is a schematic view of a partial cross-section of a tenth embodiment of the heat exchange device, showing the manner in which the connecting member cooperates with the bottom pressure block. DETAILED DESCRIPTION

[0026] REFERENCE Figures 1-3 , Figure 1 Figure 1 is a schematic view of a perspective structure of a first heat exchange device 1 of the present application.

[0027] The heat exchange device 1 comprises at least 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.

[0028] The heat exchange device 1 comprises a valve core component 11, a core body component 12, and a connecting member 13, the valve core component 11 and the core body component 12 are assembled and fixed, and the connecting member 13 is fixedly arranged with the core body component 12, for example, by welding. The valve core component 11 can be, for example, a valve core structure of an expansion valve.

[0029] The core body component 12 has a top pressure block 122, a plate portion 121, and a bottom pressure 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 in communication, and the first flow channel 101 comprises part of the first hole channel 1211, the second hole channel 1213, and the plate interchannel 1212.

[0030] In this context, the first hole channel 1211 and the second hole channel 1213 are the hole channels of the core body component 12 when it is not assembled with the valve core component 11. After the first hole channel 1211 and the second hole channel 1213 are assembled with the valve core component or the connecting member, even if there are components or parts located in other components, as long as the location of the component is the first hole channel or the second hole channel of the core body component, this context still means that the component or part is located in the first hole channel or the second hole channel.

[0031] The plate portion 121 has a plurality of stacked plates, adjacent plates are fixed by welding, and 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 holes and the second holes are located at the 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 aligned to form part of the first hole channel 1211, and the second holes of the plates are aligned to form part of the second hole channel 1213.

[0032] 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 communicating hole 1231 which is aligned with the first hole.

[0033] The heat exchange device 1 comprises a communicating passage 103 which communicates with the connecting passage 138 of the connecting member 13, and another communicating passage 104 which can communicate with the second hole 1213. In this way, fluid can enter the communicating passage 103, pass through the connecting passage of the connecting member 13, be throttled and regulated by the valve core member 11, enter the first hole 1211, and then enter the inter-plate passage 1212 and the second flow channel of the core member 12 for heat exchange. The flow path is simple, and the heat exchange efficiency is high. Of course, in other cases, the other communicating passage 104 can not directly communicate with the second hole 1213, for example, a pipe can be arranged in the second hole 1213, and the pipe can communicate with the other communicating passage 104. In other cases, the other communicating passage 104 can not communicate with the inter-plate passage 1212 through the second hole 1213. The other communicating passage 104 can be arranged on the side of the core member 12 where the communicating passage 103 is arranged, and the other communicating passage 104 can be adjacent to the communicating passage 103 but not directly communicate with the communicating passage 103.

[0034] The core member 12 has a first side 124 and a second side 126. At least part of the valve core member 11 is located on the first side 124, and the connecting passage 138 is located on the second side 126, and the connecting passage communicates with the connecting passage. For example, the valve core member 11 comprises a coil portion 1120, and the coil portion 1120 is located on the first side 124.

[0035] At least part of the valve core member 11 extends into the first hole 1211, and at least part of the connecting member 13 extends into the first hole 1211.

[0036] 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 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 is in communication with the first hole channel 1211 and the inter-plate channel 1212, the connecting member 13 has a connecting channel 138, one end of the connecting member 13 is located in the first hole channel 1211, the bottom opening 1115 is in communication with the connecting channel 138 of the connecting member 13, and the connecting channel 138 is not directly in communication with the first hole channel 1211. The valve core component 11 can be a valve core part of an electronic expansion valve. In this way, fluid from the connecting channel 138 of the connecting member 13 can enter the inter-plate channel 1212 through the bottom opening 1115, the throttling hole 1114, the peripheral opening 1113 and the first hole channel 1211, so that the fluid can exchange heat with the fluid between adjacent plates inside the plate part 121. The peripheral opening 1113 can be directly in communication with the first hole channel 1211 or directly in communication with the inter-plate channel 1212.

[0037] In this article, the connecting channel not directly in communication with the first hole channel does not exclude the flow channel between the two being connected through other components.

[0038] The connecting member 13 has a ring wall part 131, the valve seat part 111 is sealingly arranged with the ring wall part 131, and the sealing form can be radial sealing or axial sealing, etc.

[0039] The valve seat part 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 member 13, and the peripheral side of the base section 1111 is sealingly arranged with the ring wall part 131 of the connecting member 13. The middle section 1112 has a 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 first hole channel. 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. 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 channel, the inter-plate channel and the second hole channel are in communication.

[0040] It should be noted that the base section and the middle section are only defined by name in this article, and are not limited in structure.

[0041] The connecting piece 13 has a valve seat matching part 132 and a flow guide pipe 133, the valve seat part 111 and the flow guide pipe 133 are fixedly arranged, for example, can be fixed by welding, also can be fixed by other fixing ways such as pressure riveting. The valve seat matching part 132 is provided with a ring wall part 131, in the stacking direction of the plate pieces of the core component 12, the height of the ring wall part 131 is greater than the height of the base section 1111. The base section 1111 is provided with a first groove 1116, the heat exchange device 1 has a first sealing piece 14, the first sealing piece 14 is located in the first groove 1116, the first sealing piece 14 is tightly matched with the ring wall part 131 to realize the sealing of the two, in this way, the leakage between the base section 1111 and the ring wall part 131 is effectively prevented.

[0042] The valve seat matching part 132 has a side hole 1321, in the stacking direction of the plate pieces of the core component 12, the side hole 1321 is relatively closer to the first side 124 of the core component 12 than the ring wall part 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 flow guide pipe 133, enters the first hole 1211 through the throttle hole 1114, the peripheral opening 1113 and the side hole 1321, and enters the inter-plate passage 1212 and the second flow channel in communication with the first hole 1211 to exchange heat with the fluid in the second flow channel.

[0043] The connecting piece 13 is fixedly welded with the core component 12, the core component 12 has a welding matching part 125, the welding matching part 125 is fixedly welded with the outer wall of 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 superposition of at least two plate pieces; in this way, during the welding shrinkage of the core component 12, since the welding matching part 125 has a thickness greater than the thickness of the superposition of two plate pieces, 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.

[0044] The valve seat matching part 132 has a flange part 1322, the flange part 1322 is fixedly welded with the core component 12. The plate pieces of the core component 12 include a first plate piece 1214a and a second plate piece 1215a, the first plate piece 1214a and the second plate piece 1215a are fixedly welded, the top or bottom of the flange part 1322 is fixedly welded with the first plate piece 1214a; or the top or bottom of the flange part 1322 is fixedly welded with the second plate piece 1215a.

[0045] 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. When the plate portion 121 shrinks during the welding process, since the flange portion 1322 is welded and fixed with the top pressing block 122 of the core member 12, the certainty of the position of the valve seat matching portion 132 in the core member 12 can be ensured, the position of the valve seat matching portion 132 after the shrinkage of the plate is reduced, and the risk of fluid leakage between the valve seat matching portion 132 and the valve seat is reduced.

[0046] 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.

[0047] 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.

[0048] The bottom pressing block 123 has a protrusion 1232 extending into the first hole 1211, the protrusion 1232 has a communication hole 1231 in communication with the first hole 1211, the welding matching portion 125 is arranged on the inner wall of the protrusion 1232, the second portion 1332 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.

[0049] 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 member 12 is welded, the plate portion 121 will shrink, and the expanded portion 1333 is arranged to prevent the drain pipe 133 from moving upwardly 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 member 13 is reduced, and the influence on the flow passage between the base section 1111 and the drain pipe 133 is reduced.

[0050] 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 member 13 from moving in the circumferential direction, and to help the stability of the structure and the stability of the sealing.

[0051] Referring to Figure 4 , Figure 5 , Figure 4 、 Figure 5 a structure of the heat exchange device 2 is shown. Figure 4 Some of the above reference signs are not indicated in the following text, but for the convenience of understanding and to avoid repeated redundancy, the reference signs of the same parts in the above embodiments are also marked in Figure 4 . The subsequent embodiments are processed in a similar manner.

[0052] 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 cooling liquid. The heat exchange device can also have a third flow passage, a fourth flow passage, etc.

[0053] The heat exchange device 2 includes a valve core member 11, a core member 12, and a connecting member 13, the valve core member 11 and the core member 12 are assembled and fixed, and the connecting member 13 is fixedly arranged with the core member 12, for example, welded. The valve core member 11 can be a valve core structure of an expansion valve, for example.

[0054] The core member 12 has a top pressing block 122, a plate part 121, and a bottom pressing block 123, which are welded together. The plate part 121 has at least a first hole 1211, a second hole 1213, and a plate interconnecting passage 1212, which are connected together. The first flow channel 101 includes the first hole 1211, the second hole 1213, and the plate interconnecting passage 1212.

[0055] The valve core member 11 extends into the first hole 1211, and the connecting member 13 extends into the first hole 1211.

[0056] The core member 12 has a plurality of stacked plate parts, which are welded together. Each plate part has at least a first hole and a second hole. The first holes of the plate parts are aligned along the stacking direction of the plate parts, and the second holes of the plate parts are aligned along the stacking direction of the plate parts. The first holes and the second holes are located at the adjacent edges of the plate parts, so that the fluid flowing through the plate parts has a longer flow path, which helps to improve the heat exchange efficiency. The first holes of the plate parts are aligned to form a part of the first hole 1211, and the second holes of the plate parts are aligned to form a part of the second hole 1213.

[0057] 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 communicating hole 1231, which is aligned with the first hole.

[0058] The heat exchange device 2 includes a communicating passage 103 and another communicating passage 104. The communicating passage 103 is connected to the connecting passage 138 of the connecting member 13, and the another communicating passage 104 can be connected to the second hole 1213. In this way, the fluid can enter the communicating passage 103, pass through the connecting passage of the connecting member 13, be throttled and adjusted by the valve core member 11, and then enter the plate interconnecting passage 1212 and the second flow channel of the core member 12 for heat exchange. The flow path is simple, and the heat exchange efficiency is high. Of course, in other cases, the another communicating passage 104 can not be directly connected to the second hole 1213. For example, a pipe can be arranged in the second hole 1213, and the another communicating passage 104 can be connected to the pipe. In other cases, the another communicating passage 104 can not be connected to the plate interconnecting passage 1212 through the second hole 1213. The another communicating passage 104 can be arranged on the side of the core member 12 where the communicating passage 103 is arranged. The another communicating passage 104 can be adjacent to the communicating passage 103, but not directly connected to the communicating passage 103.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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, 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 due to the welding section and the adjacent section of the connecting piece; so that the welding matching part can relatively move relative to the connecting piece during the welding shrinkage process, and the welding sealing property of the connecting piece and the core component 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 piece in the welding process.

[0068] 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.

[0069] Referring to Figure 6 , Figure 7 , Figure 6 , Figure 7 A structure schematic diagram of a heat exchange device is shown.

[0070] 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.

[0071] The heat exchange device 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 assembled and fixed with the core component 12. The valve core component 11 can be a valve core structure of an expansion valve, for example.

[0072] The core member 12 has a top block 122, a plate portion 121, and a bottom block 123, which are fixed by welding. The core member 12 has at least a first passage 1211, a second passage 1213, and a plate-to-plate passage 1212, which are in communication. The first flow passage 101 includes the first passage 1211, the second passage 1213, and the plate-to-plate passage 1212.

[0073] The valve core member 11 at least partially extends into the first passage 1211, and the connecting member 13 at least partially extends into the first passage 1211.

[0074] The core member 12 has a plurality of stacked plate pieces, which are fixed by welding. Each plate piece has at least a first hole and a second hole. In the stacking direction of the plate pieces, the first holes of the plate pieces are aligned, and the second holes of the plate pieces are aligned. The first holes and the second holes are located at the adjacent edges of the plate pieces, so that the fluid flowing through the plate pieces has a longer flow path, which helps to improve the heat exchange efficiency. The first holes of the plate pieces are aligned to form a part of the first passage 1211, and the second holes of the plate pieces are aligned to form a part of the second passage 1213.

[0075] The top block 122 has a third hole 1221 aligned with the first holes, and the bottom block 123 has a communication hole 1231 aligned with the first holes.

[0076] The valve core member 11 has a valve seat portion 111, at least a part of which is located in the first 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 is in communication with the first passage 1211, and the bottom opening 1115 is in communication with the connecting passage 138 of the connecting member 13. The valve core member 11 can be a valve core part of an electronic expansion valve.

[0077] The valve seat portion 111 has a base section 1111 having the bottom opening 1115, and a middle section 1112 having 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 passage 1211, so that the depth of the assembly of the valve core member 11 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.

[0078] With the core member 12 arranged above the spool member 11, the middle section 1112 is located above the connecting member 13. Fluid enters from the bottom opening 1115, passes through the throttling hole 1114, and then flows out from the peripheral opening 1113. The fluid that has just entered the core member 12 is discharged from the peripheral opening 1113 after being throttled and depressurized by the expansion valve, and then exchanges heat with the fluid in the second flow passage. The throttling and depressurization of the refrigerant are completed inside the core member 12, and the subsequent heat exchange process is smooth, which reduces the influence of factors such as gas-liquid stratification of the throttled and depressurized refrigerant in a long pipeline on the heat exchange efficiency of the subsequent heat exchange.

[0079] The connecting member 13 has a first end portion 134 and a second end portion 135. The first end portion 134 is arranged in cooperation with the base section 1111. The first end portion of the connecting member is located in the first hole passage. The base section 1111 has a first recess 1116. The heat exchange device has a first sealing member 14. The first sealing member is located between the first end portion of the connecting member and the spool member. The first sealing member 14 is located in the first recess 1116. The first sealing member 14 is tightly fitted with the annular wall portion 131 of the connecting member 13 to achieve sealing of the two. In this way, leakage between the base section 1111 and the connecting member 13 is effectively prevented.

[0080] The base section 1111 has a second recess 1117. The second recess 1117 is closer to the peripheral opening 1113 than the first recess 1116. The connecting member 13 has a first end portion 134 and a second end portion 135. The first end portion 134 is arranged in cooperation with the base section 1111. The first end portion 134 has a limiting recess 136. The limiting recess 136 is located opposite the second recess 1117. The heat exchange device has a limiting member 16, such as a retaining ring. A portion of the retaining ring is located in the second recess 1117. A portion of the retaining ring is located in the limiting recess 136. The spool member 11 and the connecting member 13 are fixed by the retaining ring.

[0081] The second end portion 135 is fixedly arranged with the bottom pressing block 123. The second end portion 135 has a recessed portion 1353. The heat exchange device includes a second sealing member 15. The recessed portion 1353 is used to place the second sealing member 15. The second end portion 135 is sealingly arranged with the bottom pressing block 123.

[0082] Referring to Figure 8 , Figure 8 The cooperation mode of the spool member 11, the connecting member 13, and the bottom pressing block 123 is shown. The plate structure of the core member 12 is omitted. Some reference numerals in the following structure may not be shown in the Figure 8 , but can be referred to Figure 2 .

[0083] The valve seat part 111 has a middle section 1112 and a base section 1111, the base section 1111 has a bottom opening 1115, the middle section 1112 has a circumferential opening 1113, the middle section 1112 is closer to the first side 124 of the core part 12 relative to the base section 1111 in the stacking direction of the core part 12. The middle section 1112 is located in the first hole 1211, thus the depth of the assembly of the valve core part 11 to the core part 12 is deep, which helps to reduce the height of the valve core part 11 protruding from the core part 12, and helps to make the overall structure more compact.

[0084] With the side of the core part 12 where the valve core part 11 is arranged as the top, the middle section 1112 is located above the connecting piece 13; after the fluid enters from the bottom opening 1115, it passes through the throttle hole 1114 and then flows out from the circumferential opening 1113, so that the fluid just entering the core part 12 exits from the circumferential opening 1113 after the throttling pressure reduction of the expansion valve, and enters the inter-plate channel 1212 to exchange heat with the second flow channel. The throttling pressure reduction of the refrigerant is completed inside the core part 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 the gas-liquid stratification of the throttling pressure reduced refrigerant in the long pipeline caused by the pipeline setting.

[0085] The connecting piece 13 has a first end 134 and a second end 135, at least part of the base section 1111 extends into the first end 134, the base section 1111 has an external thread part 1119, the connecting piece 13 has an internal thread part 1326, the base section 1111 is threadedly connected with the connecting piece 13;

[0086] The base section 1111 has a protrusion 1118, the protrusion 1118 protrudes relative to the internal thread part 1326 in the radial direction of the valve core part 11.

[0087] The heat exchange device has a first seal 14, the first seal 14 is located between the protrusion 1118 and the first end 134.

[0088] Furthermore, the connecting piece 13 has a valve seat matching part 132 and a drainage pipe 133, the valve seat matching part 132 has a first section 1324 and a second section 1325, the first section 1324 of the valve seat matching part 132 is arranged in cooperation with the valve core part 11, the first section 1324 of the valve seat matching part 132 has an internal thread part 1326, the base section 1111 has an external thread part 1119, and the valve core part 11 is threadedly connected with the valve seat matching part 132. The base section 1111 has a protrusion 1118, the protrusion 1118 protrudes relative to the internal thread part 1326 in the radial direction of the valve core part 11. The first seal 14 is located between the protrusion 1118 and the valve seat matching part 132.

[0089] The second section 1325 of the valve seat matching part 132 is matched with the drainage pipe 133. The drainage pipe 133 extends into the second section 1325 of the valve seat matching part 132, and the outer wall of the drainage pipe 133 is welded with the inner wall of the second section 1325 of the valve seat matching part 132. The welding between the drainage pipe 133 and the valve seat matching part 132 is, for example, achieved by arranging a welding sheet.

[0090] The valve seat matching part 132 has a limiting protrusion 1327, and the end of the drainage pipe 133 is arranged opposite to the limiting protrusion 1327. The limiting protrusion 1327 can be used to limit the depth of the drainage pipe 133 extending into the valve seat matching part 132. When shrinkage occurs during the welding process of the core part 12, it is ensured that the entering depth of the drainage pipe 133 does not exceed the limiting protrusion 1327, which is beneficial to the sealing cooperation and flow channel connection between the base section 1111 and the valve seat matching part 132.

[0091] As another way, the position between the drainage pipe 133 and the second section 1325 of the valve seat matching part 132 can also be fixed by thread connection.

[0092] Referring to Figure 9 , Figure 9 The cooperation manner of the valve core part 11, the connecting piece 13 and the bottom pressing block 123 is shown, and the sheet structure of the core part 12 is omitted. In order to more clearly show the structure, some of the structure reference signs in the following drawings may not be shown in Figure 9 , but can be referred to Figure 2 .

[0093] The valve seat part 111 has a middle section 1112 and a base section 1111, the base section 1111 has a bottom opening 1115, and the middle section 1112 has a circumferential opening 1113. In the stacking direction of the core part 12, the middle section 1112 is closer to the first side 124 of the core part 12 relative to the base section 1111. The middle section 1112 is located in the first hole channel 1211, so that the depth of the valve core part 11 assembled to the core part 12 is deep, which is helpful to reduce the height of the valve core part 11 protruding from the core part 12, and is helpful to make the overall structure more compact.

[0094] With the side of the core part 12 on which the valve core part 11 is arranged as the upper side, the middle section 1112 is located above the connecting piece 13. After the fluid enters from the bottom opening 1115, passes through the throttling hole 1114 and then flows out from the circumferential opening 1113, the fluid just entering the core part 12 exits from the circumferential opening 1113 after the throttling pressure reduction of the expansion valve, and exchanges heat with the fluid in the inter-plate channel 1212 and the second flow channel. The throttling pressure reduction of the refrigerant is completed inside the core part 12, which is very smooth in connection with the subsequent heat exchange link, and reduces the influence of the factors such as gas-liquid stratification of the throttling pressure reduced refrigerant in the long pipeline on the heat exchange efficiency of the subsequent heat exchange.

[0095] The connecting piece 13 has a first end portion 134 and a second end portion 135, the first end portion 134 is arranged in cooperation with the valve seat portion 111, and the second end portion 135 is arranged in cooperation with the bottom pressing block 123.

[0096] The connecting piece 13 has a ring wall portion 131, the base portion 1111 extends into the connecting piece 13, and the base portion 1111 is arranged in sealing with the ring wall portion 131. The heat exchange device has a bottom pressing block 123, the bottom pressing block 123 is welded and fixed with the plate portion 121, the bottom pressing block 123 has a communication hole 1231, the communication hole 1231 communicates with the first hole channel 1211, the bottom pressing block 123 has a protrusion 1232, at least part of the protrusion 1232 extends into the first hole channel 1211, the second end portion 135 of the connecting piece 13 is located in the bottom pressing block 123, and at least part of the second end portion 135 is welded and fixed with the bottom pressing block 123. The second end portion 135 has a flared portion 1354, which is arranged in limiting with the bottom pressing block 123, for example by riveting.

[0097] Referring to Figure 10 , Figure 10 A structural cross-sectional view of the heat exchange device is shown. In order to more clearly show the structure, some of the following structural reference signs may not be shown in Figure 10 , but can be referred to Figure 2 and Figure 3 .

[0098] 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.

[0099] The heat exchange device 1 includes 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 arranged and fixed with the core body component 12, for example welded. The valve core component 11 can be a valve core structure of an expansion valve, for example.

[0100] The core body 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 channel 1211, a second hole channel 1213, and a plate interpass channel 1212, which are communicated, and the first flow channel 101 includes part of the first hole channel 1211, the second hole channel 1213, and the plate interpass channel 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.

[0101] The plate part 121 has a plurality of plates stacked and fixed by welding, each plate having at least a first hole and a second hole, the first holes of the plates being aligned along the stacking direction of the plates, and the second holes of the plates being aligned along the stacking direction of the plates. The first holes and the second holes are located at the adjacent edges of the plates, so that the fluid flowing through the plates has a longer flow path, which helps to improve the heat exchange efficiency. The first holes of the plates are aligned to form part of a first hole channel 1211, and the second holes of the plates are aligned to form part of a second hole channel 1213.

[0102] The top pressing block 122 has a third hole 1221 aligned with the first holes, and the bottom pressing block 123 has a communication hole 1231 aligned with the first holes.

[0103] The heat exchange device includes a communication passage 103 and another communication passage 104, the communication passage 103 being in communication with the connection passage 138 of the connecting piece 13, and the other communication passage 104 being in communication with the second hole channel 1213, so that the fluid can enter the communication passage 103, pass through the connection passage of the connecting piece 13, be throttled and adjusted by the valve core part 11, and then enter the inter-plate passage 1212 and the second flow channel of the core part 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 be directly in communication with the second hole channel 1213, for example, a pipe is arranged in the second hole channel 1213, and the other communication passage 104 is in communication with the pipe. In other cases, the other communication passage 104 can not be in communication with the inter-plate passage 1212 through the second hole channel 1213, and the other communication passage 104 can be arranged on the side of the core part 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 in communication with the communication passage 103.

[0104] At least part of the valve core part 11 extends into the first hole channel 1211, and at least part of the connecting piece 13 extends into the first hole channel 1211.

[0105] The valve core part 11 has a valve seat part 111, at least part of the valve seat part 111 being located in the first hole channel 1211, the valve seat part 111 having a peripheral opening 1113, a throttling hole 1114, and a bottom opening 1115, the peripheral opening 1113 being in communication with the first hole channel 1211, and the bottom opening 1115 being in communication with the connection passage 138 of the connecting piece 13. The valve core part 11 can be a valve core part of an electronic expansion valve.

[0106] The valve seat part 111 has a base section 1111 and a middle section 1112. The base section 1111 has a bottom opening 1115, and is located inside the connecting part 13. The base section 1111 is in sealing arrangement with the ring wall part 131 of the connecting part 13. The middle section 1112 has a circumferential opening 1113, and is located on the plate sheet part 121. In the stacking direction of the core part 12, the middle section 1112 is closer to the first side 124 of the core part 12 than the base section 1111. The circumferential opening 1113 is in communication with the inter-plate channel 1212. In this way, the valve core part 11 is assembled to the core part 12 to a greater depth, which helps to reduce the height of the valve core part 11 protruding from the core part 12, and helps to make the overall structure more compact.

[0107] The connecting part 13 has a ring wall part 131, and the valve seat part 111 is in sealing arrangement with the ring wall part 131. In the stacking direction of the core part 12, the height of the ring 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 part 14 located in the first groove 1116. The first sealing part 14 is in close cooperation with the ring wall part 131 to achieve sealing therebetween, which effectively prevents leakage between the base section 1111 and the ring wall part 131.

[0108] The connecting part 13 has a side hole 1321, and in the stacking direction of the core part 12, the side hole 1321 is closer to the first side 124 of the core part 12 than the ring wall part 131. The side hole 1321 corresponds to the circumferential opening 1113 of the valve core part 11. In this way, fluid enters from the bottom opening 1115 of the valve core part 11 through the flow guide pipe 133, passes through the throttle hole 1114, the circumferential opening 1113, the side hole 1321, enters the first hole 1211, and enters the inter-plate channel 1212 and the second flow channel in communication with the first hole 1211 for heat exchange with the fluid.

[0109] The connecting part 13 has a flange part 1322, and the flange part 1322 is welded to the core part 12. The plate sheets of the core part 12 include a first plate sheet 1214a and a second plate sheet 1215a, and the first plate sheet 1214a and the second plate sheet 1215a are welded together. The top or bottom of the flange part 1322 is welded to the first plate sheet 1214a, or the top or bottom of the flange part 1322 is welded to the second plate sheet 1215a.

[0110] The core component 12 has a top pressing block 122, and a flange part 1322 is welded and fixed with the top pressing block 122. The flange part 1322 can limit and fix the connecting piece 13 and the plate part 121. When the plate part 121 shrinks during the welding process, since the flange part 1322 is welded and fixed with the top pressing block 122 of the core component 12, the position of the connecting piece 13 in the core component 12 can be determined, the position of the connecting piece 13 after the plate part shrinks is reduced, and the risk of fluid leakage between the connecting piece 13 and the valve seat part 111 is reduced.

[0111] The core component 12 has a bottom pressing block 123, and a part of the connecting piece 13 extends into the bottom pressing block 123. The bottom pressing block 123 has a welding matching part 125, and the second end part 135 extends into the welding matching part 125. The second end part 135 is welded and fixed with the bottom pressing block 123.

[0112] The bottom pressing block 123 has a communication hole 1231 which is in communication with the first hole channel 1211. The welding matching part 125 is arranged on the inner wall of the bottom pressing block 123 where the communication hole 1231 is arranged. The second end part 135 extends into the communication hole 1231. The thickness of the bottom pressing block 123 is greater than the thickness of five plate parts. In this way, during the welding process of the core component 12, the bottom pressing block 123 can be matched and welded with the outer wall of the connecting piece 13, so as to ensure the sealing performance.

[0113] The second end part 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 closer to the first end part 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 part 125. 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 shrinks during the welding process, since the connecting piece has the welding section and the adjacent section, the distance between the end of the welding matching part which is far away from the core component and the end of the welding section which is far away from the core component is greater than or equal to zero. Therefore, during the welding shrinkage process of the core component, the welding matching part can relatively move with respect to the connecting piece, and the welding sealing performance of the connecting piece with the core component is good. In addition, the outer diameter of the adjacent section 1351 can be greater than or equal to the outer diameter of the welding section 1352. The welding section 1352 can be relatively reduced in diameter with respect to the adjacent section 1351, which is more conducive to the relative movement of the plate part with respect to the connecting piece during the welding process.

[0114] Referring to Figure 11 , Figure 11 A cross-sectional schematic view of another embodiment of the heat exchange device is shown. The general structure of the heat exchange device is referred to Figure 10The heat exchange device is shown, the core component 12 has the fifth plate 1214c, the fifth plate 1214c has the extension 1217, the extension 1217 is welded and fixed with the outer wall of the connecting piece 13, and the extension 1217 is below the middle section 1112 with the valve core component 11 being assembled to the core component 12.

[0115] The first hole 1211 has the first sub-hole 1211a and the second sub-hole 1211b, and the extension 1217 is welded and fixed with the outer wall of the connecting piece 13 to separate the first sub-hole 1211a and the second sub-hole 1211b.

[0116] The core component 12 has the sixth plate 1215c, the sixth plate 1215c has the blocking part 1218, the blocking part 1218 is located at the second hole 1213, the second hole 1213 includes the third sub-hole 1213a and the fourth sub-hole 1213b, and the blocking part 1218 separates the third sub-hole 1213a and the fourth sub-hole 1213b.

[0117] The inter-plate channel 1212 has the first route 1212a, the second route 1212b and the 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 channel 103, it enters from the bottom opening 1115, passes through the throttling hole 1114, the circumferential opening 1113, the first sub-hole 1211a, the first route 1212a, the third sub-hole 1213a, the second route 1212b, the second sub-hole 1211b, the third route 1212c and the other communication channel 104. After the fluid enters the heat exchange device, not only can it realize throttling and pressure reduction, but also the fluid entering the inter-plate channel 1212 from the circumferential opening 1113 can directly exchange heat with the fluid in the adjacent inter-plate channel 1212, and both throttling and heat exchange can be completed inside the core component 12, which is not only beneficial to the stability of the phase of the fluid, but also beneficial to improving the heat exchange efficiency.

[0118] 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, 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 due to the welding section and the adjacent section of the connecting piece, 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 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 piece in the welding process.

[0119] The thickness of the welding matching part is greater than the thickness of the superposition of at least two plates along the extension direction of the first hole, and the thickness of the welding matching part can also be greater than the thickness of the superposition of 5 plates.

[0120] 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, the first section moves to the welding matching part 125 when the core component shrinks, and is welded and fixed with the welding matching part 125.

[0121] It should be noted that the above is only an example, the extension 1217 can be integrally punched with the fifth plate or welded with the fifth plate. Of course, as other embodiments, the connecting piece can also integrally protrude the extension or be welded with the extension.

[0122] Referring to Figure 12 , Figure 12 A structure cross-sectional view of a heat exchange device is shown.

[0123] 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.

[0124] The heat exchange device 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. The valve core component 11 may, for example, be a valve core structure of an expansion valve.

[0125] The core body component 12 has a top pressing block 122, a plate piece 121, and a bottom pressing block 123. The top pressing block 122 and the plate piece 121 are welded and fixed, and the bottom pressing block 123 is assembled and fixed with the plate piece 121. The plate piece 121 has at least a first hole channel 1211, a second hole channel 1213, and a plate interlayer passage 1212. The first hole channel 1211, the plate interlayer passage 1212, and the second hole channel 1213 are communicated. The first flow channel 101 comprises part of the first hole channel 1211, the second hole channel 1213, and the plate interlayer passage 1212. The first hole channel 1211 and the second hole channel 1213 are hole channels of the core body component 12 when the core body component 12 is not assembled with the valve core component 11.

[0126] The plate piece 121 has a plurality of stacked plate pieces. Adjacent plate pieces are welded and fixed. Each plate piece has at least a first hole and a second hole. Along the stacking direction of the plate pieces, the first holes of the plate pieces are arranged in alignment, and the second holes of the plate pieces are arranged in alignment. The first holes and the second holes are located at adjacent edge positions of the plate pieces. In this way, the fluid flowing through the plate pieces can have a longer flow route, which helps to improve the heat exchange efficiency. The first holes of the plate pieces are aligned to form part of the first hole channel 1211, and the second holes of the plate pieces are aligned to form part of the second hole channel 1213.

[0127] The top pressing block 122 has a third hole 1221, which is aligned with the first hole. The bottom pressing block 123 has a communication hole 1231, which is aligned with the first hole.

[0128] The heat exchange device comprises a communication passage 103 and another communication passage 104. The communication passage 103 is communicated with the connection passage 138 of the connecting piece 13. The other communication passage 104 can be communicated with the second hole channel 1213. In this way, the fluid can enter from the communication passage 103, pass through the connection passage of the connecting piece 13, be throttled and adjusted by the valve core component 11, and then enter the plate interlayer passage 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 other communication passage 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 pipe is communicated with the other communication passage 104. In other cases, the other communication passage 104 can not be communicated with the plate interlayer passage 1212 through the second hole channel 1213. The other communication passage 104 can be arranged on one side of the core body component 12 where the communication passage 103 is arranged. The other communication passage 104 can be adjacent to the communication passage 103 and not directly communicated with the communication passage 103.

[0129] 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.

[0130] 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.

[0131] 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 relatively deep 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.

[0132] 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, 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 is tightly matched with the annular wall part 131 to realize the sealing of the two, so that the leakage between the base section 1111 and the annular wall part 131 is effectively prevented.

[0133] With the side of the core body component 12 on which the valve core component 11 is arranged as the top, the middle section 1112 is located above the connecting piece 13. After the fluid enters from the bottom opening 1115, passes through the throttling hole 1114 and then flows out from the peripheral opening 1113, the fluid just entering the core body component 12 exits from the peripheral opening 1113 after being throttled and pressure-reduced by the expansion valve, and can enter the inter-plate channel 1212 to exchange heat with the fluid of the second flow channel. The throttling and pressure-reduction of the refrigerant is completed inside the core body component 12, and the subsequent heat exchange link is very smooth, which reduces the influence of factors such as gas-liquid stratification of the throttled and pressure-reduced refrigerant in a long pipeline on the heat exchange efficiency of the subsequent heat exchange.

[0134] The connecting member 13 has a first end 134 and a second end 135, the first end 134 is arranged in cooperation with the valve seat part 111, and the second end 135 is arranged in cooperation with the bottom block 123. The connecting member 13 has a ring wall part 131, the base section 1111 extends into the connecting member 13, and the base section 1111 is arranged in sealing cooperation with the ring wall part 131. The heat exchange device has the bottom block 123, which is assembled and fixed with the plate part 121, for example, through screw connection.

[0135] The connecting member 13 has a flange part 137, which is fixed in sealing cooperation with the core part 12; the plate part 121 has a protruding part 1220, which protrudes away from the valve core part 11, and the protruding part 1220 is arranged opposite to the bottom block 123. The flange part 137 is located between the plate part 121 and the bottom block 123, of course, the flange part 137 located between the plate part 121 and the bottom block 123 is not limited to that the flange part 137 must be in contact with the plate part 121 and the bottom block 123, here only indicates that the flange part 137 will be between part of the structure of the plate part 121 and part of the structure of the bottom block 123.

[0136] The flange part 137 is limited between the plate part 121 and the bottom block 123, which can be used to determine the position of the connecting member 13 in the core part 12, and also can be used to stabilize the sealing cooperation of the connecting member 13 with the base section 1111, and facilitate the assembly of the connecting member 13 with the valve core part 11.

[0137] The heat exchange device has a second sealing member 15, for example, in the form of a sealing gasket, which is located between the flange part 137 and the plate part 121, and is used to seal the first hole 1211. The bottom block 123 has a threaded hole 1233, and the plate part 121 and the bottom block 123 can be fixed by inserting a screw into the threaded hole, and the sealing between the flange part 137 and the plate part 121 is pressed by the screw. In addition, the heat exchange device can also be provided with a third sealing member between the flange part 137 and the bottom block 123, in this way, the sealing between the connecting member 13 and the core part 12 is achieved by axial sealing, which is beneficial to stabilize the sealing of the heat exchange device, and at the same time, the processing is simple.

[0138] Since the connecting member 13 has two sealing points, the sealing between the connecting member 13 and the valve seat part 111 is achieved by placing the sealing member in the groove of the base section 1111, so that the base section 1111 and the inner wall of the connecting member 13 are sealed in a radial manner, at this time, the inner wall of the connecting member 13 requires a certain roughness, and additional processing is required for the inner wall of the connecting member 13 to ensure the cooperation required for sealing.

[0139] At another sealing point of the connecting piece 13, the flange portion 137 is pressed by the bottom pressing block 123, so that the flange portion 137 and the plate portion 121 are axially sealed. Since the flange portion 137 and the plate portion 121 are provided with a sealing member, they are sealed by an axial sealing manner. At this time, the roughness requirement of the part where the flange portion 137 and the plate portion 121 are matched is lower than the roughness requirement required when it is radially sealed. Therefore, for the processing of the connecting piece 13, the main concern is the matching of the inner wall of the connecting piece 13 and the base section 1111, and the processing consideration is less, the processing is simple and easy to realize.

[0140] Referring to Figure 13 , Figure 13 The matching relationship between the connecting piece 13 and the core component 12 is simply shown. For a clearer structure, some of the following structure marks may not be shown in Figure 13 , but can be referred to Figure 12 . Among them, the matching mode of the connecting piece 13 and the base section 1111 can be referred to Figure 12 . The connecting piece 13 has a flange portion 137, and the flange portion 137 is welded and fixed with the core component 12. The flange portion 137 has an upper portion 137a and a lower portion 137b, wherein the part where the core component 12 assembles the valve core component 11 is upper, and the other side direction of the core component 12 is lower. The upper portion 137a of the flange portion 1322 is welded and fixed with one of the plates of the plate portion 121, and the lower portion 137b of the flange portion 1322 is welded and fixed with one of the plates of the plate portion 121.

[0141] As another way, the core component 12 has a bottom pressing block 123, and the lower portion 137b of the flange portion 1322 can also be welded and fixed with the bottom pressing block 123. In this way, after the fluid enters from the communication passage 103, it enters the first hole 1211, the inter-plate passage 1212 through the connecting passage 138 of the connecting piece 13, the bottom opening 1115, the throttle hole 1114, and the peripheral opening 1113. The fluid exchanges heat with the fluid in the adjacent inter-plate passage 1212.

[0142] Referring to Figure 14 , Figure 14 is another part of the cross-sectional view of the heat exchange device. For a clearer structure, some of the following structure marks may not be shown in Figure 14 , but can be referred to Figure 12 . Among them, the matching mode of the connecting piece 13 and the base section 1111 can be referred to Figure 12 .

[0143] The core component 12 has a bottom pressing block 123, and the bottom pressing block 123 is welded and fixed with the plate portion 121. The connecting piece 13 has a first end portion 134 and a second end portion 135, and the first end portion 134 of the connecting piece 13 is sealingly arranged with the base section 1111 (refer toFigure 12 ), the second end 135 of the connecting member 13 extends into the bottom pressing block 123, the second end 135 of the connecting member 13 has a second groove 1117, the heat exchange device has a second sealing member 15, and the second sealing member 15 is arranged in the second groove 1117 to seal the outer wall of the connecting member 13 and the inner wall of the bottom pressing block 123.

Claims

1. A heat exchange device, comprising a valve core component and a core body component, the valve core component and the core body component being fixedly arranged, characterized in that: the core body component has a plate piece part, the plate piece part having at least a first hole channel, an inter-plate passage and a second hole channel, the first hole channel, the inter-plate passage and the second hole channel being in communication; the valve core component has a valve seat part, the valve seat part having a base section and a middle section, the base section having a bottom opening, the middle section having a peripheral opening, the valve seat part having a throttling hole, the throttling hole being capable of communicating the peripheral opening and the bottom opening, the middle section and the base section extending into the first hole channel, and the peripheral opening being in communication with the first hole channel; the heat exchange device comprises a connecting piece, the connecting piece having a connecting channel, the connecting piece having a first end part, the first end part of the connecting piece being located in the first hole channel, the bottom opening of the base section being in communication with the connecting channel, the connecting channel not being directly in communication with the part of the first hole channel between the connecting piece outer wall and the plate piece part; the core body component has a first side part and a second side part, at least part of the valve core component being located in the first side part, the heat exchange device having a communication channel, the communication channel being located in the second side part, the communication channel being in communication with the connecting channel. the base section extends into the connecting piece, the connecting piece having a ring wall part, the base section being sealingly arranged with the ring wall part; 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 channel, the inter-plate passage and the second hole channel are in communication. the connecting piece has a flange part, the flange part being fixedly welded with the core body component; the connecting piece has a valve seat matching part, the middle section extending into the valve seat matching part, the valve seat matching part being provided with a side hole corresponding to the peripheral opening, in the plate piece stacking direction of the core body component, the side hole being relatively closer to the first side part of the core body component than the ring wall part; in the plate piece stacking direction of the core body component, the height of the ring wall part is greater than the height of the base section.

2. The heat exchange device of claim 1, wherein: the connecting piece has a drainage tube, the valve seat matching part has the flange part, the valve seat matching part has the ring wall part, the valve seat matching part being sealingly arranged with the base section, the valve seat matching part has a bottom end part, the drainage tube being fixedly welded with the bottom end part, part of the drainage tube extending into the valve seat matching part; 3. The heat exchange device of claim 2, wherein: the drainage tube has an outward expansion part, the outward expansion part not extending into the valve seat matching part, the outward expansion part being matched and limited with the bottom part of the valve seat matching part. the plate piece part has a first plate piece and a second plate piece, the first plate piece and the second plate piece being fixedly welded, the top or bottom of the flange part being fixedly welded with the first plate piece; or the top or bottom of the flange part being fixedly welded with the second plate piece; 4. The heat exchange device of claim 3, wherein: and / or the core body component has a top pressing block, the flange part being fixedly welded with the top pressing block. the connecting piece is in the form of a drainage tube, with the side of the core body component on which the valve core component is arranged being upward, the middle section being located above the connecting piece; ​ 5. Heat exchange device according to claim 3 or 4, characterized in that: ​ ​ 6. The heat exchange device of claim 2, wherein: ​ The base section has a first groove and a second groove, the connecting piece has a ring wall part, the base section is sealingly arranged with the ring wall part, the first groove and the second groove are arranged in position correspondence; in the extension direction of the first hole, the second groove is closer to the peripheral opening than the first groove; the connecting piece has a limiting groove, the limiting groove is arranged in position opposite to the second groove; The heat exchange device has a limiting piece, at least part of the limiting piece is clamped into the second groove and the limiting groove.

7. The heat exchange device of claim 2, wherein: With the core part arranged above the one side of the valve core part, the middle section is arranged above the connecting piece; The base section has a threaded part, the connecting piece has an internal threaded part, and the base section is threadedly connected with the connecting piece.

8. The heat exchange device of claim 7, wherein: The connecting piece has a valve seat matching part and a drainage pipe, the valve seat matching part is threadedly connected with the base section, part of the drainage pipe extends into the valve seat matching part, and the drainage pipe is welded and fixed with the valve seat matching part.

9. The heat exchange device of claim 2, wherein: With the core part arranged above the one side of the valve core part, the middle section is arranged above the connecting piece; The connecting piece has a second end part, the base section extends into the first end part, and the base section is sealingly arranged with the first end part; The heat exchange device has a bottom pressing block, the bottom pressing block is welded and fixed with the plate part, the bottom pressing block has a communication hole, the communication hole is in communication with the first hole, the bottom pressing block has a protrusion, at least part of the protrusion extends into the first hole, the second end part of the connecting piece is arranged on the bottom pressing block, and the second end part is welded and fixed with the bottom pressing block.

10. The heat exchange device of claim 1, wherein: The connecting piece is in the form of a drainage pipe; with the core part arranged above the one side of the valve core part, the middle section is arranged above the connecting piece; The core part has a third plate and a fourth plate, the third plate and the fourth plate are welded and fixed, the third plate has a first ring protrusion, the fourth plate has a second ring protrusion, the base section extends into the first ring protrusion, and the base section is sealingly arranged with the first ring protrusion; The first end part of the connecting piece extends into the second ring protrusion, and the second ring protrusion is welded and fixed with the connecting piece.

11. The heat exchange device of claim 10, wherein: The first ring protrusion is provided with a first hole, the second ring protrusion is provided with a first hole, the first hole passes through the first ring protrusion and the second ring protrusion, the first ring protrusion extends into the first hole of the plate adjacent to the third plate, the second ring protrusion extends into the first hole of the plate adjacent to the fourth plate, and a gap is left between the first ring protrusion and the wall part of the plate provided with the first hole and adjacent to the third plate, and a gap is left between the second ring protrusion and the wall part of the plate provided with the first hole and adjacent to the fourth plate.

12. Heat exchange device according to claim 10 or 11, characterized in that: The connecting piece has a second end part, at least part of the first end part is welded and fixed with the second ring protrusion, and the second end part is welded and fixed with the core part; The first end portion has a first section and a second section, the first section of the first end portion extends into the second ring protrusion, the second section does not extend into the second ring protrusion, the second section has an outer diameter that is larger than the first section, the outer diameter of the second section tapers toward the first section. The first end portion has a first section and a second section, the first section of the first end portion extends into the second ring protrusion, the second section does not extend into the second ring protrusion, the second section has an outer diameter that is larger than the first section, the outer diameter of the second section tapers toward the first section. The first end portion has a first section and a second section, the first section

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