Multifunctional integrated plate heat exchanger with liquid storage

Abstract

The present application relates to a kind of integrated plate heat exchanger with liquid storage multifunction, including water-cooled condensing module and heat recovery module, and the two parts are connected by intermediate connecting plate.Water-cooled condensing module is provided with the cooling liquid passage and refrigerant passage formed by the alternate laminated laminated sheet, for cooling refrigerant;Heat recovery module is provided with the refrigerant high-pressure passage and low-pressure passage formed by several multilayer laminated sheet, realize the heat exchange between high and low pressure refrigerant.In heat recovery module, it also contains liquid storage cavity and drying bottle, respectively for storing supercooled liquid refrigerant and absorbing moisture.Refrigerant is filtered after drying and flows out from refrigerant high-pressure outlet.The structure integrates the multiple functions of water-cooled condenser, liquid storage tank and heat recovery device, reduces the number of system pipeline and the number of parts, reduces the risk of system refrigerant leakage.Drying bottle adopts detachable design, easy to maintain replacement.In addition, the present application reduces the volume and weight of heat exchanger through modular design, improves the integration and production efficiency of thermal management system, and is suitable for the compact space layout of electric vehicle thermal management system.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plate heat exchangers, and relates to an integrated plate heat exchanger with a liquid storage function. BACKGROUND

[0002] With the continuous promotion of the double-carbon policy and the strong demand for energy utilization efficiency improvement, in today's electric vehicle market with higher and higher popularization rate, each host factory is developing in the direction of integration and module in the field of thermal management system, which not only helps to reduce the cost of system components, but also helps to design the space layout of the whole vehicle and reduce the energy consumption of the whole vehicle. The highly integrated thermal management system product greatly improves the core competitiveness of the brand, and also provides the customer's whole vehicle with a sense of technology and high added value selling point.

[0003] In the existing full-indirect thermal management system suitable for R290 refrigerant, the refrigerant circuit is provided with a liquid storage tank at the rear end of the water-cooled condenser, and then the device is connected through a separate pipeline. The tank and the pipeline occupy a large space, which is not conducive to the miniaturization and integration of the module, and is also not conducive to the continuous optimization of the layout work of the compact front cabin space of the whole vehicle. At the same time, the dispersed components are time-consuming and laborious to assemble on the production line, which is not conducive to improving the production efficiency and shortening the production rhythm. Finally, in order to reduce the amount of refrigerant added, the content volume of the refrigerant system is strictly controlled to be small enough to reduce the risk of R290 refrigerant leakage and explosion. Therefore, if the liquid storage tank, gas-liquid separator and other components are used, not only the space layout is difficult, but also the leakage risk of the system connection is increased.

[0004] The liquid storage tank in the refrigerant system circuit has three functions of liquid storage, filtration and drying. The refrigerant system without the liquid storage tank also needs to retain these functions. In the after-sales market, if the filtration and drying functions of the system are damaged, the liquid storage tank with integrated liquid storage, filtration and drying functions needs to be replaced as a whole. However, there is no specific solution or measure to replace only a single function in the current electric vehicle market. Therefore, the traditional design of such components makes it difficult to troubleshoot after-sales failures, the cost of replacing components by customers is high, undamaged functional devices are discarded, causing resource waste and serious environmental pollution. SUMMARY

[0005] Therefore, the purpose of the present application is to solve the above problems and provide an integrated plate heat exchanger with a liquid storage function.

[0006] To achieve the above purpose, the present application provides the following technical scheme:

[0007] An integrated plate heat exchanger with a liquid storage function, comprising a water-cooled condensation module and a heat recovery module respectively arranged on both sides of an intermediate connecting plate.

[0008] The water-cooled condensing module is provided with cooling liquid channels and refrigerant channels arranged in an alternating and stacked manner; the heat recovery module is provided with refrigerant high-pressure channels and refrigerant low-pressure channels arranged in an alternating and stacked manner; the cooling liquid channels and the refrigerant channels, the refrigerant high-pressure channels and the refrigerant low-pressure channels are all formed by stacking a plurality of heat exchange laminates, a single medium channel is formed between adjacent heat exchange laminates, and different media in the medium channels of adjacent layers exchange heat through the heat exchange laminates;

[0009] One end of the cooling liquid channel is connected to a water inlet pipe, and the other end is connected to a water outlet pipe, so that the cooling liquid is connected to the water-cooled condensing module; one end of the refrigerant channel is connected to a refrigerant inlet, and the other end is connected to one end of the refrigerant high-pressure channel through a through hole in the intermediate connecting plate; the other end of the refrigerant high-pressure channel is connected to a refrigerant high-pressure outlet; one end of the refrigerant low-pressure channel is connected to a refrigerant low-pressure inlet, and the other end is connected to a refrigerant low-pressure outlet;

[0010] The heat recovery module is provided with a liquid storage cavity and a drying bottle on the side away from the intermediate connecting plate; the liquid storage cavity is arranged between the refrigerant high-pressure channel and the refrigerant high-pressure outlet and is used for storing supercooled liquid refrigerant; the drying bottle is connected to the heat recovery module through a support, a drying channel for connecting the drying bottle and the liquid storage cavity is arranged in the support, and a filter screen is arranged on the refrigerant high-pressure outlet;

[0011] The cooling liquid in the cooling liquid channel cools the high-pressure refrigerant in the refrigerant channel, the water-cooled high-pressure refrigerant enters the refrigerant high-pressure channel, the low-pressure refrigerant in the refrigerant low-pressure channel is evaporated to absorb heat to cool the high-pressure refrigerant in the refrigerant high-pressure channel into supercooled liquid refrigerant, and the supercooled liquid refrigerant is stored in the liquid storage cavity and the drying bottle and flows out from the refrigerant high-pressure outlet after drying and filtering.

[0012] Further, the water inlet pipe and the water outlet pipe are arranged on the side of the water-cooled condensing module away from the intermediate connecting plate, and the refrigerant inlet, the refrigerant high-pressure outlet, the refrigerant low-pressure inlet and the refrigerant low-pressure outlet are arranged on the side of the heat recovery module away from the intermediate connecting plate.

[0013] Further, the heat recovery module comprises a liquid storage top plate, an upper connecting plate, an upper top plate 2-6, a plurality of stacked heat exchange laminates and a lower bottom plate which are sequentially stacked and brazed together; the lower bottom plate is fixedly connected to the intermediate connecting plate;

[0014] The liquid storage cavity is arranged on the inner side of the liquid storage top plate; the refrigerant inlet, the refrigerant high-pressure outlet, the refrigerant low-pressure inlet and the refrigerant low-pressure outlet are arranged on the liquid storage top plate; a circular insertion pipe is arranged on the refrigerant inlet, and the circular insertion pipe penetrates through the intermediate connecting plate to connect the refrigerant inlet and the refrigerant channel.

[0015] Further, the water-cooled condensing module comprises a lower bottom plate, a plurality of heat exchange laminates, an upper top plate and an upper top plate connecting plate which are sequentially stacked and brazed together; the lower bottom plate is fixed on the intermediate connecting plate; the water inlet pipe and the water outlet pipe are arranged on the upper top plate connecting plate.

[0016] Further, the heat exchange laminates are provided with concave-convex deformation areas, and two adjacent heat exchange laminates are alternately and oppositely stacked to form a heat exchange inner cavity in the middle; a plurality of through holes are arranged around the heat exchange laminates, the heat exchange inner cavities formed between the heat exchange laminates are connected in groups through the through holes, and two groups of alternatingly stacked channels are formed, so that the cooling liquid channel and the refrigerant channel are formed in the water-cooled condensing module, and the high-pressure refrigerant channel and the low-pressure refrigerant channel are formed in the heat recovery module.

[0017] Further, a plurality of drying agent particles are arranged in the drying bottle, and the filter screen is detachably clamped on the refrigerant high-pressure outlet.

[0018] Further, the drying bottle is detachably connected to the support through threads.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. The integrated plate heat exchanger in the present application is connected together by the water-cooled condensing module and the heat recovery module which have consistent external dimensions, the high-pressure side refrigerant is connected to each other through the intermediate fixed connection, the connecting pipeline between the two devices is reduced, the heat exchange efficiency of the water-cooled condenser is improved, the reasonable supercooling degree of the refrigerant before the expansion valve and the superheating degree of the refrigerant on the suction side are ensured, and thus the refrigeration performance of the whole system is improved.

[0021] 2. The integrated plate heat exchanger in the present application has the functions of the water-cooled condenser, the liquid storage tank and the heat recovery device, through the function integration, the arrangement space of the traditional separate water-cooled condenser and the heat recovery device is reduced, the number of parts and the number of pipeline connection ports are reduced, the overall structure is compact, the occupied space is small, and the integrated plate heat exchanger has the advantages of easy manufacturing, easy assembly, easy system integration and low manufacturing cost.

[0022] 3. The traditional liquid storage tank function is divided into three modules of liquid storage, filtration and drying in the present application. A cavity for storing liquid refrigerant is arranged in the heat recovery module, the inner space of the cavity can store excess liquid refrigerant during system operation, and the cavity is the main liquid refrigerant storage area. The size of the inner cavity can be designed according to the system refrigerant storage demand. The detachable filter screen arranged at the high-pressure side outlet of the heat recovery module realizes the filtration function. In order to keep the inside of the refrigerant system dry and avoid ice blockage of the expansion valve, the drying function is replaced by a small-sized and easy-to-install drying bottle. In addition to containing drying agents that can absorb moisture, the drying bottle also has the function of auxiliary storage of liquid refrigerant. In addition, the drying bottle has only one connection port, which reduces the risk of refrigerant leakage compared with the traditional liquid storage tank.

[0023] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the fluid flow direction of the integrated plate heat exchanger with liquid storage function in this invention.

[0026] Figure 2 , 3 This is a perspective view of the integrated plate heat exchanger with liquid storage function in this invention.

[0027] Figure 4 This is a 3D exploded view of the integrated plate heat exchanger with liquid storage function in this invention.

[0028] Figure 5 This is an exploded plan view of the integrated plate heat exchanger with liquid storage function in this invention.

[0029] Figure 6 This is a partial schematic diagram of the integrated plate heat exchanger with liquid storage function in this invention.

[0030] Figure 7 This is a schematic diagram of the liquid storage chamber structure of the regenerative module in this invention.

[0031] Figure 8 This is a schematic diagram of the heat exchange stack structure in this invention. Detailed Implementation

[0032] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] The drawings are only used for exemplary illustration, and the representation is only a schematic diagram, and cannot be understood as a limitation on the present application; in order to better illustrate the embodiments of the present application, some components in the drawings are omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted.

[0034] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application, and for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0035] Please refer to Figures 1-8 It is a kind of integrated plate heat exchanger with liquid storage multi-function, including water-cooled condensing module 1 and regenerative module 2 respectively arranged on the two sides of intermediate connecting plate 3;

[0036] Cooling liquid channel and refrigerant channel are arranged in water-cooled condensing module 1, and they are alternately arranged in layers with each other;Refrigerant high-pressure channel and refrigerant low-pressure channel are arranged in regenerative module, and they are alternately arranged in layers with each other;Cooling liquid channel and refrigerant channel, refrigerant high-pressure channel and refrigerant low-pressure channel are all stacked by a plurality of stacked heat exchange laminates, a single medium channel is formed between adjacent heat exchange laminates, and different media in the medium channels of adjacent layers are forced to exchange heat by convection through heat exchange laminates;

[0037] One end of cooling liquid channel is connected to water inlet pipe G1, and the other end is connected to water outlet pipe G2, cooling liquid is connected into water-cooled condensing module;One end of refrigerant channel is connected to refrigerant inlet S1, and the other end is communicated with one end of refrigerant high-pressure channel through the through hole on the intermediate connecting plate, the other end of refrigerant high-pressure channel is communicated with refrigerant high-pressure outlet S2;One end of refrigerant low-pressure channel is communicated with refrigerant low-pressure inlet S3, and the other end is communicated with refrigerant low-pressure outlet S4;

[0038] The side of regenerative module 2 away from the intermediate connecting plate is provided with a liquid storage cavity S5 and a drying bottle 4, the liquid storage cavity S5 is arranged between the refrigerant high-pressure channel and the refrigerant high-pressure outlet, and is used for storing supercooled liquid refrigerant;The drying bottle 4 is connected to the regenerative module through a support, a drying channel for communicating the drying bottle with the liquid storage cavity is arranged in the support, and a filter screen 2-3 is arranged on the refrigerant high-pressure outlet;

[0039] The cooling liquid in the cooling liquid channel cools the high-pressure refrigerant in the water-cooled condenser module, and the water-cooled high-pressure refrigerant enters the refrigerant high-pressure channel of the heat recovery module, and the low-pressure refrigerant in the refrigerant low-pressure channel is evaporated to cool the high-pressure refrigerant in the refrigerant high-pressure channel into supercooled liquid refrigerant; the supercooled liquid refrigerant is stored in the liquid storage cavity and the drying bottle, and after drying and filtering, it flows out from the refrigerant high-pressure outlet.

[0040] The water inlet pipe and the water outlet pipe are arranged on the side of the water-cooled condenser module away from the intermediate connecting plate, and the refrigerant inlet, the refrigerant high-pressure outlet, the refrigerant low-pressure inlet and the refrigerant low-pressure outlet are arranged on the side of the heat recovery module away from the intermediate connecting plate.

[0041] The heat recovery module includes a liquid storage top plate 2-1, an upper connecting plate 2-5, an upper top plate 2-6, a plurality of stacked heat exchange laminates 2-7, and a lower bottom plate 2-8 which are sequentially stacked and brazed together; the liquid storage cavity S5 is arranged on the inner side of the liquid storage top plate 2-1; the refrigerant inlet, the refrigerant high-pressure outlet, the refrigerant low-pressure inlet and the refrigerant low-pressure outlet are arranged on the liquid storage top plate; a circular insertion pipe 2-4 is arranged on the refrigerant inlet, and the circular insertion pipe 2-4 passes through the heat recovery module and the intermediate connecting plate to connect the refrigerant inlet with the refrigerant channel of the water-cooled condenser module.

[0042] The heat exchange laminates are provided with concave-convex deformation regions, and two adjacent heat exchange laminates are stacked in opposite directions, and the contact parts of adjacent laminates are brazed together to form a heat exchange inner cavity in the middle; a plurality of through holes are arranged around the heat exchange laminates, the heat exchange inner cavities formed between the plurality of heat exchange laminates are connected in groups through the through holes, forming two groups of alternating stacked channels, thereby forming a cooling liquid channel and a refrigerant channel in the water-cooled condenser module, and forming a refrigerant high-pressure channel and a refrigerant low-pressure channel in the heat recovery module.

[0043] Specifically, one side of the intermediate connecting plate 3 is assembled with the back of the lower bottom plate 2-8 in the regenerative module 2, and the other side of the intermediate connecting plate 3 is connected with the back of the lower bottom plate 1-1 of the water-cooled condensing module, so that the water-cooled condensing module 1 and the regenerative module 2 are connected through the two sides of the intermediate connecting plate 3. The high-pressure refrigerant side of the regenerative module and the refrigerant side of the water-cooled condensing module are only connected through the elliptical hole S130 in the intermediate connecting plate 3, and in addition, one end of the circular insertion pipe 2-4 with a certain wall thickness is inserted into the through hole S121 on the liquid storage top plate 2-1 and is welded together during brazing. The circular insertion pipe 2-4 penetrates the elliptical hole inside the regenerative module 2, the intermediate connecting plate 3 and the water-cooled condensing module 1 corresponding to the through hole S121, and the other end of the circular insertion pipe 2-4 stops at the flow dividing channel lamination F7 of the water-cooled condensing module. The outer radius of the circular insertion pipe 2-4 is smaller than the minor axis of the elliptical hole through which it passes, so that the medium-temperature high-pressure gaseous refrigerant after the first condensation of the water-cooled condensing module flows into the regenerative module for further cooling. At the same time, the outer radius of the circular insertion pipe 2-4 is consistent with the radius of the corresponding circular hole on the flow dividing channel lamination F7 of the water-cooled condensing module through which it is inserted, and the circular hole flange of the flow dividing channel lamination F7 is welded with the circular insertion pipe 2-4 during brazing, so that the flow dividing channel lamination F7 has the function of changing the flow of the refrigerant inside the water-cooled condensing module.

[0044] The water-cooled condensing module 1 includes a lower bottom plate 1-1, a plurality of heat exchange laminations 1-2, an upper top plate 1-3, and an upper top plate connecting plate 1-4 which are sequentially stacked and brazed together. The lower bottom plate 1-1 is fixedly welded to the intermediate connecting plate. The through hole S314 and the through hole S414 of the upper top plate connecting plate 1-4 correspondingly install the water inlet pipe G1 and the water outlet pipe G2 for circulating cooling liquid, respectively. The supercooling region of the water-cooled condensing module is designed to be located on the high-pressure side of the regenerative module, that is, the heat exchange region formed by the through hole S128, the through hole S127, the through hole S126, the through hole S125, the through hole S121, and the through hole S227, the through hole S226, the through hole S225, and the through hole S221 of the regenerative module being in communication with each other. As shown in Figure 4 、 Figure 5 As shown in

[0045] As shown in Figures 4-5As shown, a support 2-2 that can match and seal the inside with several desiccant particles 4-1 is arranged on one side of the liquid storage top plate 2-1, and the desiccant bottle 4 is connected with the support 2-2 by thread and sealing ring combination and sealed together. The filter screen 2-3 can be clamped and placed in the through hole S221 inside the refrigerant high-pressure outlet port of the liquid storage top plate 2-1 through the through hole on the outer surface of the liquid storage top plate 2-1. If the system performance is affected due to serious blockage of foreign matter during operation, the filter screen 2-3 can be removed and replaced with a new one.

[0046] In combination Figure 4 、 Figure 5 、 Figure 6 , the upper connecting plate 2-5 is assembled and welded with the liquid storage top plate 2-1 in an upper and lower manner to form an internal liquid storage cavity S5, which is in communication with the inner through hole S221 of the refrigerant high-pressure outlet of the heat recovery module. When the system has excess supercooled liquid refrigerant, it can flow into and store in the liquid storage cavity S5. When the system needs to increase the circulation of the refrigerant, the liquid refrigerant stored in the liquid storage cavity S5 flows out through the refrigerant high-pressure outlet of the heat recovery module and enters the expansion valve through S2 to participate in the system circulation. Figure 2 、 Figure 5 It can be understood that the refrigerant inlet S1, the refrigerant high-pressure outlet S2, the refrigerant low-pressure inlet S3, and the refrigerant low-pressure outlet S4 are arranged on the outer surface of the liquid storage top plate 2-1, and the surface is connected with other parts by end face sealing. Figure 6 As shown in the enlarged view A3, the refrigerant low-pressure outlet S4 has a groove 211 for placing an end face sealing sealing ring, and the other three outer side ports have similar design structures. The inner side of the liquid storage top plate 2-1 is provided with through holes S121, S221, S321, and S421, which correspond to the refrigerant inlet S1, the refrigerant high-pressure outlet S2, the refrigerant low-pressure inlet S3, and the refrigerant low-pressure outlet S4, respectively. The inner side of the liquid storage top plate 2-1 is assembled and welded with the upper connecting plate 2-5, and the four through holes of the two plates are independent of each other and not in communication at this position.

[0047] As shown in the enlarged view A3, the refrigerant low-pressure outlet S4 has a groove 211 for placing an end face sealing sealing ring, and the other three outer side ports have similar design structures. The inner side of the liquid storage top plate 2-1 is provided with through holes S121, S221, S321, and S421, which correspond to the refrigerant inlet S1, the refrigerant high-pressure outlet S2, the refrigerant low-pressure inlet S3, and the refrigerant low-pressure outlet S4, respectively. The inner side of the liquid storage top plate 2-1 is assembled and welded with the upper connecting plate 2-5, and the four through holes of the two plates are independent of each other and not in communication at this position. Figure 7 As shown in the enlarged view A3, the refrigerant low-pressure outlet S4 has a groove 211 for placing an end face sealing sealing ring, and the other three outer side ports have similar design structures. The inner side of the liquid storage top plate 2-1 is provided with through holes S121, S221, S321, and S421, which correspond to the refrigerant inlet S1, the refrigerant high-pressure outlet S2, the refrigerant low-pressure inlet S3, and the refrigerant low-pressure outlet S4, respectively. The inner side of the liquid storage top plate 2-1 is assembled and welded with the upper connecting plate 2-5, and the four through holes of the two plates are independent of each other and not in communication at this position.

[0048] As shown in the enlarged view A3, the refrigerant low-pressure outlet S4 has a groove 211 for placing an end face sealing sealing ring, and the other three outer side ports have similar design structures. The inner side of the liquid storage top plate 2-1 is provided with through holes S121, S221, S321, and S421, which correspond to the refrigerant inlet S1, the refrigerant high-pressure outlet S2, the refrigerant low-pressure inlet S3, and the refrigerant low-pressure outlet S4, respectively. The inner side of the liquid storage top plate 2-1 is assembled and welded with the upper connecting plate 2-5, and the four through holes of the two plates are independent of each other and not in communication at this position. Figure 1 、 Figure 4 、 Figure 5 、 Figure 6As shown, the high-temperature and high-pressure gas from the compressor discharge side can enter the inner side through-hole S121 of the outer side refrigerant inlet S1 of the liquid storage top plate 2-1 of the regenerative module, and then enter the circular insertion tube 2-4. The refrigerant in this state does not enter the heat exchange area of the regenerative module. Then, the gas in this state directly enters the water-cooled condensing module through the inside of the circular insertion tube 2-4. At this time, the high-temperature and high-pressure gas refrigerant is condensed into medium-temperature and high-pressure gas refrigerant in the water-cooled condensing module. Then, the medium-temperature and high-pressure gas refrigerant passes through the through-hole S111 of the water-cooled condensing module 1 and the oval through-hole S130 of the intermediate connecting plate 3, and then enters the high-pressure side heat exchange area of the regenerative module. The medium-temperature and high-pressure gas refrigerant in this area is heated by the low-temperature and low-pressure refrigerant in the low-pressure side of the regenerative module, and then becomes a medium-temperature and high-pressure supercooled liquid refrigerant. The liquid refrigerant flows out of the through-hole S221 of the liquid storage top plate 2-1. At the same time, excess liquid refrigerant can be stored in the liquid storage cavity S5 of the liquid storage top plate 2-1 through the channel between the inner side through-hole S221 of the liquid storage top plate 2-1 and the liquid storage cavity S5.

[0049] The flow direction of the refrigerant in the water-cooled condensing module is: refrigerant inlet S1→through-hole S121→circular insertion tube 2-4→water-cooled condensing module 1 heat exchange area (through-hole S112→through-hole S212)→intermediate connecting plate 3 through-hole S130→regenerative module 2 (through-hole S128→through-hole S127→through-hole S227→through-hole S226→through-hole S225→through-hole S221)→liquid storage cavity S5→refrigerant high-pressure outlet S2.

[0050] The cooling liquid flow direction of the water-cooled condensing module intersects with the refrigerant flow direction to enhance the heat exchange efficiency. The lower-temperature cooling liquid flows into the through-hole S312 of the water-cooled condensing module from the water inlet pipe G1 through the through-hole S314 and the through-hole S313. In the heat exchange stack, the cooling liquid flows from the through-hole S312 to the through-hole S412. In this process, the low-temperature cooling liquid is heated by the high-temperature refrigerant and becomes a higher-temperature cooling liquid. At this time, the high-temperature and high-pressure refrigerant is cooled by the cooling liquid and becomes a medium-temperature and high-pressure state. Then, the heated cooling liquid passes through the through-hole S413 and the through-hole S414 in sequence, and finally flows out from the water outlet pipe G2. Therefore, the water side flow direction of the water-cooled condensing module is: water inlet pipe G1→through-hole S314→through-hole S313→through-hole S312→through-hole S412→through-hole S413→through-hole S414→water outlet pipe G2.

[0051] The flow direction of the low-temperature and low-pressure gas refrigerant in the regenerative module is: refrigerant low-pressure inlet S3→through-hole S321→through-hole S325→through-hole S326→through-hole S327→through-hole S427→through-hole S426→through-hole S425→through-hole S421→refrigerant low-pressure outlet S4.

[0052] Each heat exchange sheet 1-2 or 2-7 is formed by continuous stamping of a certain thickness of composite aluminum plate through a die to form a plurality of concave-convex deformation feature curved surface areas and flat areas without deformation features, and the periphery is a stamping flange structure for assembly positioning and subsequent brazing sealing (such as Figure 8 The region 106 of the heat exchange sheet P1 and the region 206 of the heat exchange sheet P2 in the middle, the surface of the heat exchange sheet generally has three or four through holes, and the heat exchange sheet with three through holes is a heat exchange sheet for changing the internal medium flow process of the plate.

[0053] As shown in Figure 7 , Figure 8 , a plurality of heat exchange sheets are stacked together in a staggered manner, and the sheets with both concave-convex features and flat features inside can form two medium heat exchange areas that are not connected after stacking. As shown in Figure 6 , the heat exchange area is composed of heat exchange sheets F1, F2, F3, F4, and F5, wherein the heat exchange sheet F1 and the heat exchange sheet F2 are welded to form a heat exchange inner cavity C5, the heat exchange sheet F3 and the heat exchange sheet F4 are welded to form a heat exchange inner cavity C6, and the heat exchange inner cavity C5 and the heat exchange inner cavity C6 are cooling liquid flow-through areas that are mutually penetrated on the outside; and the inner cavity C7 formed by welding the heat exchange sheet F2 and the heat exchange sheet F3 and the heat exchange inner cavity C8 formed by welding the heat exchange sheet F4 and the heat exchange sheet F5 are heat exchange areas for the refrigerant in the water-cooled condensing module.

[0054] On the regenerative module side, similar to the water-cooled condensing module side, the heat exchange area is composed of heat exchange sheets P1, P2, P3, P4, and P5, wherein the heat exchange sheet P1 and the heat exchange sheet P2 are welded to form a heat exchange inner cavity C1, the heat exchange sheet P3 and the heat exchange sheet P4 are welded to form a heat exchange inner cavity C2, and the heat exchange inner cavity C1 and the heat exchange inner cavity C2 are regenerator low-pressure refrigerant sides that are mutually penetrated on the outside; and the heat exchange inner cavity C3 formed by welding the heat exchange sheet P2 and the heat exchange sheet P3 and the heat exchange inner cavity C4 formed by welding the heat exchange sheet P4 and the heat exchange sheet P5 are heat exchange areas for the high-pressure refrigerant side of the regenerative module.

[0055] In combination with Figure 8As shown in the drawings, the heat exchange sheet P1 is placed below the heat exchange sheet P2 and assembled together. At this time, the through holes S127, S227, S327, S427 in the heat exchange sheet P1 correspond to the through holes S127', S227', S327', S427' in the heat exchange sheet P2 respectively. Because the heat exchange sheet has more concave-convex deformation areas and non-deformation areas, for example, the convex ribs 102 in the heat exchange sheet P1 and the convex ribs 202 in the heat exchange sheet P2 are staggered and abutted together to form an internal cavity body which is in communication with a through hole in the heat exchange sheet and can flow with medium. The inner side of the turn-up area 106 of the heat exchange sheet P1 is in contact with the outer side of the turn-up area 206 of the heat exchange sheet and is welded together to avoid leakage of medium. After the two heat exchange sheets are overlapped together, the upward protruding areas 104 and 105 in the heat exchange sheet P1 are in partial contact with the flat area 207 in the heat exchange sheet P2 and are welded together. At this time, the fluid flowing through the through holes S127, S227 and S127', S227' cannot flow into the internal cavity body formed by the overlapped heat exchange sheet P1 and heat exchange sheet P2, but can only flow into the adjacent cavity body above or below for heat exchange.

[0056] In addition, the upward protruding deformation areas 204 and 205 in the heat exchange sheet P2 are in contact with the corresponding positions of the heat exchange sheet assembled thereon and play a supporting role. The contact parts are welded together after subsequent brazing. The partial deformation area 107 in the heat exchange sheet P1 is in contact with the corresponding position of the heat exchange sheet P2 and supports a reasonable safety distance between the two sheets to avoid extrusion deformation, so that the opening channel formed by the non-deformation area 101 near the through hole S327 of the heat exchange sheet P1 and the inward deformation area 201 near the through hole S327' of the heat exchange sheet P2 are not in contact with each other. The medium flowing through the through hole can flow into the internal cavity body formed by the overlapped heat exchange sheet P1 and heat exchange sheet P2 for heat exchange. Then the medium after heat exchange can flow out from the opening channel formed by the non-deformation area 103 near the through hole S427 of the heat exchange sheet P1 and the inward deformation area 203 near the through hole S427' of the heat exchange sheet P2 which are not in contact with each other. In general, the medium flowing through the through holes S327, S327' and S427, S427' of the heat exchange sheet P1 and the heat exchange sheet P2 can enter the cavity body formed in the middle of the two heat exchange sheets through the opening channel formed on the left side of the two heat exchange sheets for heat exchange. At the same time, the medium flowing through this side cannot flow into the adjacent cavity bodies above and below for heat exchange.

[0057] Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions, and all should be covered in the scope of the claims of the present application.

Claims

1. A multi-functional integrated plate heat exchanger with liquid storage, characterized in that: The water-cooled condensing module and the heat recovery module are respectively arranged on two sides of the intermediate connecting plate; The water-cooled condensing module is provided with cooling liquid channels and refrigerant channels arranged in an alternating and stacked manner; the heat recovery module is provided with refrigerant high-pressure channels and refrigerant low-pressure channels arranged in an alternating and stacked manner; the cooling liquid channels and the refrigerant channels, the refrigerant high-pressure channels and the refrigerant low-pressure channels are all formed by stacking a plurality of heat exchange laminates, a single medium channel is formed between adjacent heat exchange laminates, and different media in the medium channels of adjacent layers exchange heat through the heat exchange laminates; One end of the cooling liquid channel is connected to the water inlet pipe, and the other end is connected to the water outlet pipe, so that the cooling liquid is connected to the water-cooled condensing module; one end of the refrigerant channel is connected to the refrigerant inlet, and the other end is communicated with one end of the refrigerant high-pressure channel through a through hole on the intermediate connecting plate; the other end of the refrigerant high-pressure channel is communicated with the refrigerant high-pressure outlet; one end of the refrigerant low-pressure channel is communicated with the refrigerant low-pressure inlet, and the other end is communicated with the refrigerant low-pressure outlet; The heat recovery module is provided with a liquid storage cavity and a drying bottle on the side away from the intermediate connecting plate; the liquid storage cavity is arranged between the refrigerant high-pressure channel and the refrigerant high-pressure outlet on the inner side of the liquid storage top plate of the heat recovery module, and is used for storing supercooled liquid refrigerant; the drying bottle is connected to the heat recovery module through a support, a drying channel for connecting the drying bottle and the liquid storage cavity is arranged in the support, and a filter screen is arranged on the refrigerant high-pressure outlet; The cooling liquid in the cooling liquid channel cools the high-pressure refrigerant in the refrigerant channel, the water-cooled high-pressure refrigerant enters the refrigerant high-pressure channel, the low-pressure refrigerant in the refrigerant low-pressure channel is evaporated to cool the high-pressure refrigerant in the refrigerant high-pressure channel into supercooled liquid refrigerant, and the supercooled liquid refrigerant is stored in the liquid storage cavity and the drying bottle and flows out from the refrigerant high-pressure outlet after drying and filtering.

2. The integrated plate heat exchanger with liquid storage according to claim 1, characterized in that: The water inlet pipe and the water outlet pipe are arranged on the side of the water-cooled condensing module away from the intermediate connecting plate; the refrigerant inlet, the refrigerant high-pressure outlet, the refrigerant low-pressure inlet and the refrigerant low-pressure outlet are all arranged on the side of the heat recovery module away from the intermediate connecting plate.

3. The integrated plate heat exchanger with liquid storage according to claim 2, characterized in that: The heat recovery module comprises a liquid storage top plate upper connecting plate, an upper top plate, a plurality of stacked heat exchange laminates and a lower bottom plate which are sequentially stacked and brazed together; and the lower bottom plate is fixedly connected to the intermediate connecting plate; The refrigerant inlet, the refrigerant high-pressure outlet, the refrigerant low-pressure inlet and the refrigerant low-pressure outlet are all arranged on the liquid storage top plate; a circular insertion pipe is arranged on the refrigerant inlet, and the circular insertion pipe penetrates through the intermediate connecting plate to connect the refrigerant inlet with the refrigerant channel.

4. The integrated plate heat exchanger with liquid storage according to claim 2, characterized in that: The water-cooled condensing module comprises a lower bottom plate, a plurality of heat exchange laminates, an upper top plate and an upper top plate connecting plate which are sequentially stacked and brazed together; the lower bottom plate is fixedly arranged on the intermediate connecting plate; the water inlet pipe and the water outlet pipe are arranged on the upper top plate connecting plate.

5. The integrated plate heat exchanger with liquid storage according to claim 1, characterized in that: The heat exchange laminates are provided with concave-convex deformation areas, two adjacent heat exchange laminates are stacked alternately, and a heat exchange inner cavity is formed in the middle; a plurality of through holes are arranged around the heat exchange laminates, the heat exchange inner cavities formed among the plurality of heat exchange laminates are connected in groups through the through holes, two groups of alternatingly-stacked channels are formed, and thus the cooling liquid channel and the refrigerant channel are formed in the water-cooling condenser module, and the refrigerant high-pressure channel and the refrigerant low-pressure channel are formed in the heat recovery module.

6. The integrated plate heat exchanger with liquid storage according to claim 1, characterized in that: The drying bottle is provided with a plurality of drying agent particles, and the filter screen is detachably clamped on the refrigerant high-pressure outlet.

7. The integrated plate heat exchanger with liquid storage according to claim 1, characterized in that: The drying bottle is detachably connected to the support through threads.

Images