Integrated plate type heat exchanger for vehicle

Abstract

The invention provides an integrated plate type heat exchanger for a vehicle, which relates to the technical field of heat exchange devices and comprises a partition plate for dividing an integrated core into a water-cooling condensation part and a supercooling part; the water-cooling condensation part and the supercooling part comprise refrigerant core plates and cooling liquid core plates which are alternately stacked, and the refrigerant core plates and the cooling liquid core plates form a refrigerant channel and a cooling liquid channel; the connecting flange is fixed to the top of the supercooling part, the liquid storage drying tank is detachably connected with the connecting flange, a guide pipe is arranged in the integrated core, one end of the guide pipe penetrates through the partition plate and communicates with the outlet side of the refrigerant channel, and the other end of the guide pipe is inserted into the connecting flange and communicates with the liquid storage drying tank. A backflow channel is formed in the connecting flange, one end of the backflow channel is communicated with the outlet of the liquid storage drying tank, and the other end of the backflow channel is communicated with the refrigerant channel inlet side of the refrigerant side of the supercooling part, so that the technical problems that the three parts are independently arranged and the integrated core plate cannot be universally used are solved, and the effects of facilitating whole vehicle arrangement, reducing a large number of pipelines, reducing leakage points and reducing cost are achieved. And the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of heat exchange device technology, and in particular to an integrated plate heat exchanger for vehicles. Background Technology

[0002] In automotive thermal management, water-cooled condensers, subcoolers, and liquid refrigerant dryers are core components on the refrigerant side. These three components work together to cool and subcool the high-temperature refrigerant, as well as store, dry, and filter the liquid refrigerant, thus affecting the system's heat exchange efficiency and operational stability. With increasing demands for compactness, layout flexibility, and cost control in vehicles, the integrated design of refrigerant-side components has become a development trend in thermal management modules.

[0003] In existing technologies, water-cooled condensers, liquid receivers and dryers are mostly arranged separately and independently, with each component connected by dedicated pipes and connectors to form a complete refrigerant circuit. Some improved solutions can only achieve simple physical integration of the water-cooled condenser and the liquid receiver, such as connecting their inlet and outlet by sharing a flange structure, but cannot achieve integrated integration of the three components. Another solution attempts to achieve integration of the three components by adding through holes and additional flow channels on the core plate, but this structure is not compatible with the core plate of traditional water-cooled condensers and requires the development of a new mold.

[0004] The core technical problem with the existing structure is insufficient integration. Whether the three components are arranged independently or partially integrated, it is difficult to balance structural compactness and component commonality. When arranged independently, they require a lot of vehicle space, and the use of a large number of pipes and connectors not only increases assembly complexity but also leads to an increase in the number of system leaks, reducing operational reliability. At the same time, it also increases the material and assembly costs of pipes and connectors. On the other hand, the integration solution of partial integration or non-standard core board has the limitations of narrow applicability and high mold investment costs, which cannot meet the comprehensive optimization requirements of the vehicle thermal management system. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated plate heat exchanger for vehicles, so as to alleviate the technical problems existing in the prior art, such as the independent arrangement of water-cooled condensers, liquid storage drying tanks, and subcoolers, and the incompatibility of integrated core plates, which require the separate development of new molds.

[0006] The integrated plate heat exchanger for vehicles provided by this invention includes: an integrated core, a partition, a liquid storage and drying tank, and a connecting flange; The partition divides the integrated core into a water-cooled condensing section and a subcooling section. Both the water-cooled condensing section and the subcooling section include alternating refrigerant core plates and coolant core plates. The upper surface of each refrigerant core plate and the lower surface of each coolant core plate form a refrigerant channel, and the lower surface of each refrigerant core plate and the upper surface of each coolant core plate form a coolant channel. The partition is sandwiched between the topmost refrigerant core plate of the water-cooled condensing section and the bottommost refrigerant core plate of the subcooling section. The connecting flange is fixed to the top of the subcooling section. The liquid storage dryer is detachably connected to the connecting flange. A conduit is installed inside the integrated core. One end of the conduit passes through the partition and is connected to the outlet side of the refrigerant channel on the refrigerant side of the water-cooled condensing section. The other end is inserted into the connecting flange and is connected to the liquid storage dryer. A return channel is formed inside the connecting flange. One end of the return channel is connected to the outlet of the liquid storage dryer, and the other end is connected to the inlet side of the refrigerant channel on the refrigerant side of the subcooling section.

[0007] Furthermore, the integrated core also includes a refrigerant inlet pipe, a refrigerant outlet pipe, a coolant inlet pipe, and a coolant outlet pipe; The refrigerant inlet pipe is connected to the inlet side of the refrigerant passage on the refrigerant side of the water-cooled condenser section, and the refrigerant outlet pipe is connected to the outlet side of the refrigerant passage on the refrigerant side of the subcooled section. The coolant inlet pipe is connected to the coolant channel inlet side of the subcooled section. The partition has through holes, which connect the coolant side of the subcooled section and the coolant side of the water-cooled condenser section to form a parallel structure. The coolant outlet pipe is connected to the coolant channel outlet side of the subcooled section.

[0008] Furthermore, a through hole is provided on the connecting flange, and the conduit is coaxially disposed in the hole, forming a reflux channel between the outer wall of the conduit and the inner wall of the through hole.

[0009] Furthermore, the water-cooled condenser section within the integrated core is also equipped with baffles, which are spaced apart between two refrigerant core plates to adjust the internal flow of the water-cooled condenser section.

[0010] Furthermore, the contact surfaces between the conduit and the diaphragm, as well as the contact surfaces between the conduit and the connecting flange, are all sealed by brazing to prevent leakage.

[0011] Furthermore, the refrigerant core plate and the coolant core plate are planar core plates.

[0012] Furthermore, the refrigerant flow channel formed by the refrigerant core plate and the coolant core plate, and / or the coolant flow channel, are welded with internal fins, which are arranged at intervals along the length of the flow channel to enhance the turbulence effect of the medium in the flow channel.

[0013] Furthermore, the refrigerant core plate and the coolant core plate are irregularly shaped core plates, which are either herringbone pattern core plates or core plates with dimple protrusions.

[0014] Beneficial effects: The integrated plate heat exchanger for vehicles provided by this invention divides the integrated core into a water-cooled condenser section and a subcooling section by means of a partition, realizing the integration of the two major heat exchange functional modules in the same core. At the same time, the liquid storage and drying tank is directly connected to the core through a connecting flange. Compared with the traditional method of independently arranging the water-cooled condenser, subcooler, and liquid storage and drying tank, it reduces the overall space occupied and is more suitable for the compact layout requirements of the vehicle. In addition, the conduits in the integrated core and the return channel in the connecting flange replace the traditional external connection pipelines, reducing a large number of pipeline joints and external connectors. This reduces the risk of refrigerant leakage to improve the stability of system operation and saves pipeline material costs and assembly time.

[0015] The core plate type of this invention is compatible with traditional split heat exchangers, eliminating the need to develop a dedicated core plate mold for the integrated structure. Furthermore, the liquid storage and drying tank and the connecting flange are detachable, making it compatible with conventional liquid storage and drying tanks on the market. This significantly reduces investment in the research and development of new parts. The alternating arrangement of refrigerant and coolant channels within the core ensures efficient heat exchange between the hot and cold media, meeting the performance requirements of automotive thermal management systems for refrigerant cooling and subcooling. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an integrated plate heat exchanger for vehicles provided in an embodiment of the present invention; Figure 2 A schematic diagram of the refrigerant side structure of an integrated plate heat exchanger for vehicles provided in an embodiment of the present invention; Figure 3 A schematic diagram of the coolant-side structure of an integrated plate heat exchanger for vehicles provided in an embodiment of the present invention; Figure 4 A schematic diagram of the connection flange of an integrated plate heat exchanger for vehicles provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a planar core plate in an integrated plate heat exchanger for vehicles provided in an embodiment of the present invention; Figure 6 A schematic diagram of the structure of an inner fin of a planar core plate in an integrated plate heat exchanger for vehicles provided in an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a herringbone core plate in an integrated plate heat exchanger for vehicles provided in an embodiment of the present invention; Figure 8 A schematic diagram of a structure with a dimple-protruding core plate in an automotive integrated plate heat exchanger provided in an embodiment of the present invention; Figure 9 A logic diagram of medium flow on both sides of an integrated plate heat exchanger for vehicles provided in an embodiment of the present invention.

[0018] Icons: 1-Integrated core; 101-Refrigerant core plate; 102-Coolant core plate; 103-Refrigerant passage; 104-Coolant passage; 105-Refrigerant inlet pipe; 106-Refrigerant outlet pipe; 107-Coolant inlet pipe; 108-Coolant outlet pipe; 109-Baffle; 2-Partition plate; 3-Liquid storage and drying tank; 4-Connecting flange; 5-Water-cooled condenser section; 6-Subcooling section; 7-Conduit; 8-Return passage. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] like Figures 1-5 As shown, the automotive integrated plate heat exchanger provided by the present invention includes: an integrated core 1, a partition 2, a liquid storage and drying tank 3, and a connecting flange 4; The partition 2 divides the integrated core 1 into a water-cooled condensing section 5 and a subcooling section 6. Both the water-cooled condensing section 5 and the subcooling section 6 include alternatingly stacked refrigerant core plates 101 and coolant core plates 102. The upper surface of each refrigerant core plate 101 and the lower surface of the coolant core plate 102 form a refrigerant channel 103, and the lower surface of each refrigerant core plate 101 and the upper surface of the coolant core plate 102 form a coolant channel 104. The partition 2 is sandwiched between the topmost refrigerant core plate 101 of the water-cooled condensing section 5 and the bottommost refrigerant core plate 101 of the subcooling section 6. The connecting flange 4 is fixed to the top of the subcooling section 6. The liquid storage drying tank 3 is detachably connected to the connecting flange 4. The integrated core 1 is provided with a conduit 7. One end of the conduit 7 passes through the partition 2 and is connected to the outlet side of the refrigerant channel 103 on the refrigerant side of the water-cooled condensing section 5. The other end is inserted into the connecting flange 4 and is connected to the liquid storage drying tank 3. A return channel 8 is formed inside the connecting flange 4. One end of the return channel 8 is connected to the outlet of the liquid storage drying tank 3, and the other end is connected to the inlet side of the refrigerant channel 103 on the refrigerant side of the subcooling section 6.

[0027] Specifically, the partition 2 is installed at the functional partition interface inside the integrated core 1, specifically sandwiched between the upper surface of the refrigerant core plate 101 at the top of the water-cooled condensing section 5 and the lower surface of the refrigerant core plate 101 at the bottom of the subcooling section 6, thereby physically separating the internal space of the integrated core 1 and dividing it into independent water-cooled condensing functional areas and subcooling functional areas. The internal core plates of the water-cooled condenser section 5 and the subcooler section 6 follow a unified stacking logic, and are composed of alternating stacks of refrigerant core plates 101 and coolant core plates 102. Each refrigerant core plate 101 and the adjacent coolant core plate 102 form a dual-channel structure. The upper surface of each refrigerant core plate 101 and the lower surface of the adjacent coolant core plate 102 above it together form a closed refrigerant channel 103. The lower surface of each refrigerant core plate 101 and the upper surface of the adjacent coolant core plate 102 below it also form a closed coolant channel 104, thereby realizing the spaced distribution of refrigerant channels 103 and coolant channels 104 in the core. The connecting flange 4 is fixed to the top end face of the subcooling section 6. The liquid storage drying tank 3 is connected to the connecting flange 4 by bolts through the flange interface, which is convenient for later maintenance and replacement. The conduit 7 inside the integrated core 1 is arranged longitudinally along the height direction of the core. Its lower end passes through the pre-set sealing through hole on the partition plate 2 (the inner wall of the through hole and the outer wall of the conduit 7 are sealed by brazing) and is connected to the outlet side of the refrigerant channel 103 on the refrigerant side of the water-cooled condensing section 5. The upper end of the conduit 7 extends upward and is inserted into the pre-set channel inside the connecting flange 4, and is sealed and connected to the inlet end of the liquid storage drying tank 3. The connecting flange 4 is machined to form a bent return channel 8. One end of the return channel 8 is connected to the outlet end of the liquid storage drying tank 3, and the other end extends laterally to the inlet side of the refrigerant channel 103 on the refrigerant side of the subcooling section 6, thus constructing a refrigerant crossflow path of "water-cooled condensing section 5 refrigerant channel 103 → conduit 7 → liquid storage drying tank 3 → return channel 8 → subcooling section 6 refrigerant channel 03".

[0028] The integrated design significantly optimizes space and cost. The water-cooled condenser 5 and subcooler 6 are integrated into the same integrated core 1 through the partition 2. With the integrated connection of the connecting flange 4 and the liquid storage and drying tank 3, the overall volume is reduced compared to the traditional three-independent arrangement, making it more suitable for the vehicle's narrow installation space. At the same time, the conduit 7 and return channel 8 replace the traditional external connection pipelines, reducing at least 2-3 sets of pipeline joints. This not only reduces the risk of refrigerant leakage, but also saves pipeline material costs and assembly time, simplifying the assembly process of the vehicle's thermal management system. The partition 2, sandwiched between the two refrigerant core plates 101, blocks the crossflow of refrigerant channels 103 between the water-cooled condenser section 5 and the subcooling section 6, preventing the mixing of high-temperature refrigerant (outlet of the water-cooled condenser section 5) and low-temperature refrigerant (inlet of the subcooling section 6). This ensures that the water-cooled condensation (initial cooling of the high-temperature refrigerant to a saturated liquid state) and subcooling (further cooling of the refrigerant to a subcooled state) functions operate independently, improving heat exchange efficiency. Furthermore, the refrigerant core plate 101 and the coolant core plate 102 use the same type of plate, with an alternating stacked dual-channel structure that maximizes the contact area between the hot and cold media, ensuring stable heat exchange efficiency. Moreover, the refrigerant core plate 101 and coolant core plate 102, using the same type of plate, can maintain the same core plate specifications as traditional split-type water-cooled condensers, eliminating the need for dedicated core plate molds.

[0029] In an embodiment of the present invention, the integrated core 1 further includes a refrigerant inlet pipe 105, a refrigerant outlet pipe 106, a coolant inlet pipe 107, and a coolant outlet pipe 108. The refrigerant inlet pipe 105 is connected to the inlet side of the refrigerant channel 103 on the refrigerant side of the water-cooled condenser section 5, and the refrigerant outlet pipe 106 is connected to the outlet side of the refrigerant channel 103 on the refrigerant side of the subcooling section 6. The coolant inlet pipe 107 is connected to the inlet side of the coolant channel 104 on the coolant side of the subcooled section 6. The partition 2 has a through hole, so that the coolant side of the subcooled section 6 and the coolant side of the water-cooled condenser section 5 are connected through the through hole to form a parallel structure. The coolant outlet pipe 108 is connected to the outlet side of the coolant channel 104 on the coolant side of the subcooled section 6.

[0030] Specifically, the refrigerant inlet pipe 105 is fixed to the lower end face of the integrated core 1 near the water-cooled condenser 5, and is sealed and connected to the inlet side of the refrigerant channel 103 on the refrigerant side of the water-cooled condenser 5 by welding, ensuring that high-temperature refrigerant can be directly injected into the refrigerant channel 103 of the water-cooled condenser 5; the refrigerant outlet pipe 106 is correspondingly set inside the integrated core 1, and is sealed and connected to the outlet side of the refrigerant channel 103 on the refrigerant side of the subcooled section 6 by welding, forming a refrigerant flow path of "refrigerant inlet pipe 105 → water-cooled condenser 5 refrigerant channel 103 → conduit 7 → liquid storage drying tank 3 → return channel 8 → subcooled section 6 refrigerant channel 103 → refrigerant outlet pipe 106". The coolant piping is connected in parallel with a centralized inlet and outlet; the coolant inlet pipe 107 is fixed to the upper end face of the integrated core 1 corresponding to the subcooled section 6, and is welded and sealed to the inlet side of the coolant channel 104 on the coolant side of the subcooled section 6; the baffle 2 has a circular or rectangular through hole at the position corresponding to the coolant channel 104, and the edge of the through hole is aligned with the inner wall of the coolant channel 104 to ensure no obstruction of liquid flow, so that the coolant channel 104 on the coolant side of the subcooled section 6 can pass through the through hole and be condensed by water cooling. The coolant passage 104 on the coolant side of section 5 is connected to form a parallel structure on the coolant side; the coolant outlet pipe 108 is arranged on the same side as the coolant inlet pipe 107, and is welded and sealed to the outlet side of the coolant passage 104 on the coolant side of subcooled section 6, realizing the coolant flow path of "coolant inlet pipe 107 → subcooled section 6 coolant passage 104 → (partially diverted to water-cooled condenser section 5 coolant passage 104) → merged back to subcooled section 6 coolant passage 104 → coolant outlet pipe 108".

[0031] The unidirectional flow design of the refrigerant piping ensures heat exchange efficiency. The refrigerant inlet pipe 105 directly connects to the water-cooled condenser section 5, and the refrigerant outlet pipe 106 directly connects to the subcooling section 6. Combined with the intermediate series-connected liquid storage and drying tank 3, this ensures unidirectional refrigerant flow, preventing backflow or mixing within the core. This guarantees that the water-cooled condenser section 5 effectively cools the high-temperature gaseous refrigerant initially, and the subcooling section 6 effectively cools the saturated liquid refrigerant. Compared to traditional multi-pipeline distributed connections, this improves refrigerant heat exchange efficiency. The parallel coolant structure reduces system resistance. The subcooling section 6 and the water-cooled condenser section 5's coolant channels 104 are connected in parallel through the through-holes in the baffle 2. Compared to a series structure, the overall flow resistance on the coolant side is reduced, which decreases the energy consumption of the coolant pump and ensures uniform coolant flow between the two functional areas, preventing heat exchange efficiency degradation due to insufficient local flow.

[0032] In an embodiment of the present invention, a through hole is provided on the connecting flange 4, and the conduit 7 is coaxially disposed in the hole, forming a return channel 8 between the outer wall of the conduit 7 and the inner wall of the through hole.

[0033] The water-cooled condenser section 5 inside the integrated core 1 is also provided with a baffle 109. The baffle 109 is spaced between two refrigerant core plates 101 and is used to adjust the internal flow of the water-cooled condenser section 5.

[0034] The contact surfaces between the conduit 7 and the partition 2, and between the conduit 7 and the connecting flange 4, are all sealed by brazing to prevent leakage.

[0035] Specifically, a through hole is provided on the connecting flange 4 along its central axis, penetrating both ends of the flange. The diameter of the hole is larger than the outer diameter of the conduit 7, ensuring that an annular gap is left after the conduit 7 is inserted. The conduit 7 inside the integrated core 1 extends vertically upward and is coaxially inserted into the through hole. The upper end of the conduit 7 is sealed and connected to the inlet of the liquid storage drying tank 3, and the lower end penetrates the pre-set through hole of the partition plate 2 and is connected to the outlet side of the refrigerant channel 103 on the refrigerant side of the water-cooled condensing section 5. The annular gap formed between the outer wall of the conduit 7 and the inner wall of the through hole is the return flow 8. The upper end of the return flow channel 8 is connected to the outlet of the liquid storage drying tank 3, and the lower end extends to the inlet side of the refrigerant channel 103 on the refrigerant side of the subcooling section 6, realizing the refrigerant connection between the liquid storage drying tank 3 and the subcooling section 6. Meanwhile, the water-cooled condenser section 5 inside the integrated core 1 is also provided with at least one baffle 109. The baffle 109 divides the originally continuous refrigerant channel 103 inside the water-cooled condenser section 5 into multiple zigzag flow channels. In order to prevent refrigerant leakage, the contact surface between the conduit 7 and the baffle 2 (i.e., the outer wall where the conduit 7 passes through the through hole of the baffle 2) and the contact surface between the conduit 7 and the connecting flange 4 (i.e., the outer wall where the conduit 7 passes through the through hole) are sealed by high-temperature brazing process. After brazing, a continuous and dense metal sealing layer is formed, which completely blocks the path of refrigerant overflow from the contact surface.

[0036] The single through-hole of the connecting flange 4 is coaxially fitted with the conduit 7, eliminating the need for additional refrigerant channels on the flange or integrated core 1. This reduces the size of the connecting flange 4 and avoids structural modifications to the core plate due to additional openings. It ensures that the refrigerant core plate 101 and coolant core plate 102 can directly reuse the core plate specifications of traditional split-type heat exchangers, saving on new mold development costs. By increasing or decreasing the number of baffles 109, the flow path of the refrigerant in the water-cooled condenser section 5 can be extended as needed (from a single flow to a 2-3 reversal flow), extending the heat exchange time between the refrigerant and coolant, adapting to the heat load requirements of different vehicles, without requiring replacement of the entire core, thus improving the module's universal adaptability. The brazing sealing process has stronger environmental adaptability than traditional rubber seals and threaded seals, able to withstand extreme temperature fluctuations and long-term vibrations in automotive applications, reducing the risk of leakage compared to traditional sealing methods, and ensuring stable operation of the heat exchanger throughout the entire vehicle's lifecycle.

[0037] In an embodiment of the present invention, as one implementation of a core board, such as Figure 5 As shown, the refrigerant core plate 101 and the coolant core plate 102 are planar core plates.

[0038] In an embodiment of the present invention, as one implementation of a core board, such as Figure 6 As shown, the refrigerant channel 103 formed by the refrigerant core plate 101 and the coolant core plate 102, and / or the coolant channel 104, are welded with inner fins. The inner fins are arranged at intervals along the length of the channel to increase the turbulence effect of the medium in the channel.

[0039] In an embodiment of the present invention, as one implementation of a core board, such as Figure 7 As shown, the refrigerant core plate 101 and the coolant core plate 102 are irregularly shaped core plates, and the irregularly shaped core plates are herringbone pattern core plates. In an embodiment of the present invention, as one implementation of a core board, such as Figure 8 As shown, the refrigerant core plate 101 and the coolant core plate 102 are irregularly shaped core plates, and the irregularly shaped core plate is one of the core plates with dimple protrusions.

[0040] Specifically, in the first embodiment, the refrigerant core plate 101 and the coolant core plate 102 adopt a planar core plate structure. The core plate body is a flat metal sheet. After being stacked alternately, the upper and lower surfaces of the planar refrigerant core plate 101 are tightly attached to the corresponding surfaces of the adjacent planar coolant core plate 102, forming a smooth inner wall refrigerant channel 103 and coolant channel 104. This can directly adapt to the stacking and assembly requirements of the water-cooled condenser 5 and the subcooled part 6 in the integrated core 1 without the need for additional processing of irregular structures.

[0041] In the second embodiment, serrated or corrugated inner fins are welded into the refrigerant channel 103 enclosed by the refrigerant core plate 101 and the coolant core plate 102, or into the coolant channel 104, or into both channels. The inner fins are arranged at equal or gradually varying intervals along the length of the channel. The two ends of the fins are welded and fixed to the inner wall of the channel (i.e., the surface of the refrigerant core plate 101 or the coolant core plate 102), forming a three-dimensional support and turbulence structure that runs through the channel.

[0042] In the third and fourth embodiments, the refrigerant core plate 101 and the coolant core plate 102 are irregularly shaped core plates: the herringbone core plate has continuous intersecting herringbone-shaped raised patterns on its surface, and the patterns extend along the width direction of the core plate. After stacking, the raised patterns can form periodic flow channel cross-sectional changes in the refrigerant channel 103 and the coolant channel 104; the core plate with dimple protrusions has hemispherical or cylindrical dimple protrusions evenly distributed on its surface (the depressions and protrusions correspond one-to-one), which ensures the structural strength of the core plate while forming dispersed turbulence points in the channel.

[0043] Based on the above embodiments, the specific working process of the automotive integrated plate heat exchanger provided by the present invention is as follows: like Figure 9 As shown, the refrigerant side working process is as follows: the high-temperature refrigerant enters the refrigerant channel 103 of the water-cooled condenser section 5 through the refrigerant inlet pipe 105, and is initially cooled after exchanging heat with the coolant in the coolant channel 104. Then, it flows into the liquid storage drying tank 3 through the conduit 7 to complete the drying and filtration. The filtered refrigerant enters the refrigerant channel 103 of the subcooling section 6 through the return channel 8 in the connecting flange 4, and is further cooled by exchanging heat with the coolant. Finally, it flows out from the refrigerant outlet pipe 106.

[0044] Working process on the coolant side: Low-temperature coolant enters the coolant channel 104 of the subcooling section 6 through the coolant inlet pipe 107. Part of the coolant is diverted through the through hole of the partition 2 to the coolant channel 104 of the water-cooled condensing section 5. After completing bidirectional heat exchange with the refrigerant, the coolant on both sides converges into the coolant channel 104 of the subcooling section 6. The coolant that has absorbed heat is discharged from the coolant outlet pipe 108, completing the circulation.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated plate heat exchanger for vehicles, characterized in that The integrated core (1), the partition plate (2), the liquid storage and drying tank (3) and the connecting flange (4) are included. The partition plate (2) separates the integrated core (1) into a water-cooled condensing part (5) and a supercooling part (6); the water-cooled condensing part (5) and the supercooling part (6) each include alternately stacked refrigerant core plates (101) and cooling liquid core plates (102), the upper surface of each refrigerant core plate (101) and the lower surface of the cooling liquid core plate (102) form a refrigerant passage (103), the lower surface of each refrigerant core plate (101) and the upper surface of the cooling liquid core plate (102) form a cooling liquid passage (104), and the partition plate (2) is clamped between the refrigerant core plate (101) at the top of the water-cooled condensing part (5) and the refrigerant core plate (101) at the bottom of the supercooling part (6). The connecting flange (4) is fixed to the top of the supercooling part (6), the liquid storage and drying tank (3) is detachably connected to the connecting flange (4), a conduit (7) is arranged inside the integrated core (1), one end of the conduit (7) penetrates through the partition plate (2) and is in communication with the outlet side of the refrigerant passage (103) on the refrigerant side of the water-cooled condensing part (5), the other end of the conduit (7) is inserted into the connecting flange (4) and is in communication with the liquid storage and drying tank (3); a reflux passage (8) is formed in the connecting flange (4), one end of the reflux passage (8) is in communication with the outlet of the liquid storage and drying tank (3), and the other end of the reflux passage (8) is in communication with the inlet side of the refrigerant passage (103) on the refrigerant side of the supercooling part (6).

2. The integrated plate heat exchanger for vehicles according to claim 1, wherein the integrated core (1) further comprises a refrigerant inlet pipe (105), a refrigerant outlet pipe (106), a cooling liquid inlet pipe (107) and a cooling liquid outlet pipe (108); the refrigerant inlet pipe (105) is in communication with the inlet side of the refrigerant passage (103) on the refrigerant side of the water-cooled condensing part (5), the refrigerant outlet pipe (106) is in communication with the outlet side of the refrigerant passage (103) on the refrigerant side of the supercooling part (6); the cooling liquid inlet pipe (107) is in communication with the inlet side of the cooling liquid passage (104) on the cooling liquid side of the supercooling part (6), the partition plate (2) is provided with a through hole, so that the cooling liquid side of the supercooling part (6) and the cooling liquid side of the water-cooled condensing part (5) are in parallel connection through the through hole, and the cooling liquid outlet pipe (108) is in communication with the outlet side of the cooling liquid passage (104) on the cooling liquid side of the supercooling part (6).

3. The integrated plate heat exchanger for vehicles according to claim 1, wherein a through hole is formed in the connecting flange (4), the conduit (7) is coaxially arranged in the through hole, and the reflux passage (8) is formed between the outer wall of the conduit (7) and the inner wall of the through hole.

4. The integrated plate heat exchanger for vehicles according to claim 1, wherein ​ ​ ​ The water-cooled condensing part (5) in the integrated core (1) is further provided with a baffle (109), the baffle (109) is arranged between the two refrigerant core plates (101) at intervals, and is used for adjusting the internal flow of the water-cooled condensing part (5).

5. The integrated plate heat exchanger for vehicle according to claim 1, characterized in that, The contact surface of the conduit (7) and the partition plate (2) and the contact surface of the conduit (7) and the connecting flange (4) are all sealed by brazing, so as to prevent leakage.

6. The integrated plate heat exchanger for vehicle according to claim 1, characterized in that, The refrigerant core plate (101) and the coolant core plate (102) are planar core plates.

7. The integrated plate heat exchanger for vehicle according to claim 6, characterized in that, The refrigerant passage (103) formed by the refrigerant core plate (101) and the coolant core plate (102) is welded with inner fins, and / or the coolant passage (104) is welded with inner fins, the inner fins are arranged at intervals along the length direction of the flow channel, and are used for increasing the turbulent effect of the medium in the flow channel.

8. The integrated plate heat exchanger for vehicle according to claim 1, characterized in that, The refrigerant core plate (101) and the coolant core plate (102) are special-shaped structure core plates, and the special-shaped structure core plates are one of herringbone core plates or dimple convex core plates.

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