Integrated plate type heat exchanger with liquid storage function

Abstract

The invention relates to an integrated plate heat exchanger with a liquid storage function, which comprises a water-cooling condensation module and a heat regeneration module which are connected through a middle connecting plate. The water-cooling condensation module is provided with a cooling liquid channel and a refrigerant channel which are formed by alternately stacked laminations, and the water-cooling condensation module is used for cooling a refrigerant; the heat return module is provided with a refrigerant high-pressure channel and a refrigerant low-pressure channel which are formed by a plurality of layers of laminations, and heat exchange between high-pressure refrigerants and low-pressure refrigerants is achieved. The heat regeneration module further comprises a liquid storage cavity and a drying bottle which are used for storing the supercooled liquid refrigerant and absorbing water correspondingly. And the refrigerant flows out from the refrigerant high-pressure outlet after being dried and filtered. The structure integrates multiple functions of the water-cooling condenser, the liquid storage tank and the heat regenerator, the number of system pipelines and the number of parts are reduced, and the risk of system refrigerant leakage is reduced. And the drying bottle adopts a detachable design and is convenient to maintain and replace. In addition, the size and the weight of the heat exchanger are reduced through modular design, the integration and the production efficiency of the heat management system are improved, and the heat management system is suitable for the electric vehicle heat management system needing compact space layout.

Description

Technical Field

[0001] The invention belongs to the technical field of plate heat exchangers and relates to an integrated plate heat exchanger with liquid storage function. Background Art

[0002] With the strong demand for improving energy efficiency and the increasing penetration of electric vehicles, all OEMs are moving towards integration and modularization in the field of thermal management systems, which is not only conducive to reducing the cost of system components, but also conducive to the design of vehicle space layout and reducing vehicle energy consumption. Highly integrated thermal management system products have greatly enhanced the core competitiveness of the brands, and also provided customers with a sense of technology and high value-added selling points for their vehicles.

[0003] In the existing fully indirect thermal management system suitable for R290 refrigerant, the refrigerant circuit is usually equipped with a tank such as 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 pipeline occupy a large space, which is not conducive to the miniaturization and integration of the module, nor is it conducive to the continuous optimization of the layout of the compact front cabin space of the whole vehicle; at the same time, it is time-consuming and laborious to assemble the scattered parts on the production line, which is not conducive to improving production efficiency and shortening the production cycle. Finally, due to the safety requirements of R290 refrigerant, the volume of the refrigerant system is small enough to reduce the amount of refrigerant added, thereby strictly controlling the leakage of system refrigerant and ultimately reducing the risk of R290 refrigerant leakage and explosion. Therefore, if components such as liquid storage tanks and gas-liquid separators are used, it will not only increase the difficulty of space layout, but also increase the risk of leakage at the system connection.

[0004] The liquid storage tank in the refrigerant system circuit has three major functions: liquid storage, filtering, and drying. The refrigerant system that eliminates the liquid storage tank must also retain these functions. In the aftermarket, if the filtering and drying functions of the system are damaged, the liquid storage tank with integrated liquid storage, filtering, and drying functions needs to be replaced as a whole. However, there are currently no targeted solutions and measures in the electric vehicle market to replace only a single function. Therefore, the traditional design of this type of parts makes it difficult to eliminate the cause of after-sales failures, the cost of replacing parts for customers is relatively high, and the discarding of undamaged functional components causes waste of resources and serious environmental pollution. Summary of the invention

[0005] In view of this, the object of the present invention is to solve the above-mentioned problem and provide an integrated plate heat exchanger with liquid storage multifunction.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An integrated plate heat exchanger with liquid storage multifunction, 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 which are alternately stacked with each other; the heat recovery module is provided with refrigerant high-pressure channels and refrigerant low-pressure channels which are alternately stacked with each other; the cooling liquid channels and refrigerant channels, the refrigerant high-pressure channels and the refrigerant low-pressure channels are all formed by stacking a plurality of stacked heat exchange laminations, a single medium channel is formed between adjacent heat exchange laminations, and different media in the medium channels of adjacent layers are heat exchanged through the heat exchange laminations;

[0009] One end of the coolant channel is connected to the water inlet pipe, and the other end is connected to the water outlet pipe, so that the coolant 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 connected to one end of the refrigerant high-pressure channel through the through hole on the middle connecting plate, and the other end of the refrigerant high-pressure channel is connected to the refrigerant high-pressure outlet; one end of the refrigerant low-pressure channel is connected to the refrigerant low-pressure inlet, and the other end is connected to the refrigerant low-pressure outlet;

[0010] The heat recovery module is provided with a liquid storage chamber and a drying bottle on one side away from the middle connecting plate. The liquid storage chamber is provided between the refrigerant high-pressure channel and the refrigerant high-pressure outlet and is used to store supercooled liquid refrigerant. The drying bottle is connected to the heat recovery module through a bracket. The bracket is provided with a drying channel connecting the drying bottle with the liquid storage chamber. A filter screen is provided on the refrigerant high-pressure outlet.

[0011] The coolant in the coolant 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 evaporates for the second time and absorbs heat 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.

[0012] Furthermore, the water inlet pipe and the water outlet pipe are arranged on the side of the water-cooled condensing module away from the middle connecting plate, and 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 middle connecting plate.

[0013] Furthermore, the heat recovery module includes a liquid storage top plate, an upper connecting plate, an upper top plate 2-6, a plurality of stacked heat exchange laminations, and a lower bottom plate which are sequentially stacked and brazed into one; the lower bottom plate is fixedly connected to the middle connecting plate;

[0014] The liquid storage chamber is arranged on the inner side of the liquid storage top plate; the refrigerant inlet, refrigerant high-pressure outlet, refrigerant low-pressure inlet, and refrigerant low-pressure outlet are all arranged on the liquid storage top plate; a circular insert is provided on the refrigerant inlet, and the circular insert passes through the middle connecting plate to connect the refrigerant inlet with the refrigerant channel.

[0015] Furthermore, the water-cooled condensing module includes a lower base plate, a plurality of heat exchange laminates, an upper top plate, and an upper top plate connecting plate that are sequentially stacked and brazed together; the lower base plate is fixed on the middle connecting plate; the water inlet pipe and the water outlet pipe are arranged on the upper top plate connecting plate.

[0016] Furthermore, the heat exchange stack is provided with a concave-convex deformation area, and two adjacent heat exchange stacks are staggered and stacked forward and backward to form a heat exchange inner cavity in the middle; a plurality of through holes are provided around the heat exchange stack, and the heat exchange inner cavity formed between the plurality of heat exchange stacks is grouped and connected through the through holes to form two groups of alternatingly stacked channels, thereby forming the coolant channel and the refrigerant channel in the water-cooled condensation module, and forming the refrigerant high-pressure channel and the refrigerant low-pressure channel in the heat recovery module.

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

[0018] Furthermore, the drying bottle is detachably connected to the bracket via threads.

[0019] The beneficial effects of the present invention are:

[0020] 1. The integrated plate heat exchanger in the present invention is composed of a water-cooled condensing module and a heat recovery module with the same external dimensions, which are connected back to back. The refrigerant on the high-pressure side is interconnected through a fixed intermediate connection, which reduces the connecting pipelines between the two devices, improves the heat exchange efficiency of the water-cooled condenser, ensures a reasonable subcooling degree of the refrigerant before the expansion valve and a superheating degree of the refrigerant on the pressure-suction side, and thus improves the refrigeration performance of the whole system.

[0021] 2. The integrated plate heat exchanger in the present invention has three major functions: a water-cooled condenser, a liquid storage tank and a heat regenerator. Through functional integration, the layout space of the traditional separate water-cooled condenser and the heat regenerator is reduced, the number of parts and the number of pipe connection ports are reduced, and the overall structure is compact and occupies a small space. It has the advantages of easy manufacturing, easy assembly, easy system integration and low manufacturing cost.

[0022] 3. The present invention decomposes the functions of the traditional liquid storage tank into three modules: liquid storage, filtration and drying. A cavity for storing liquid refrigerant is provided in the heat recovery module. The inner space of the cavity can store excess liquid refrigerant during the operation of the system. It is the main storage area for liquid refrigerant. The volume of the liquid storage cavity can be designed according to the system's demand for refrigerant storage. A detachable filter screen is provided at the outlet of the high-pressure side of the heat recovery module to realize the filtering function. In order to keep the refrigerant system dry and avoid ice blockage of the expansion valve, its drying function is replaced by a miniaturized and easy-to-install drying bottle. In addition to the desiccant that can absorb moisture, the drying bottle also has the function of assisting in the storage of liquid refrigerant. In addition, the drying bottle has only one connection interface, which is one less connection port than the traditional liquid storage tank, reducing the risk of refrigerant leakage in the system.

[0023] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 It is a schematic diagram of the fluid flow of the integrated plate heat exchanger with liquid storage multifunction in the present invention.

[0026] Figure 2 , 3 It is a three-dimensional diagram of the integrated plate heat exchanger with liquid storage multifunction in the present invention.

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

[0028] Figure 5 It is a planar exploded view of the integrated plate heat exchanger with liquid storage multifunction in the present invention.

[0029] Figure 6 It is a partial schematic diagram of the integrated plate heat exchanger with liquid storage multifunction in the present invention.

[0030] Figure 7 It is a schematic diagram of the liquid storage chamber structure of the heat recovery module in the present invention.

[0031] Figure 8 It is a schematic diagram of the heat exchange stack structure in the present invention. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways 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 only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0034] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] See also Figures 1 to 8 , is an integrated plate heat exchanger with liquid storage multifunction, comprising a water-cooled condensing module 1 and a heat recovery module 2 respectively arranged on both sides of an intermediate connecting plate 3;

[0036] The water-cooled condensing module 1 is provided with cooling liquid channels and refrigerant channels which are alternately stacked with each other; the heat recovery module is provided with refrigerant high-pressure channels and refrigerant low-pressure channels which are alternately stacked with each other; the cooling liquid channels and refrigerant channels, the refrigerant high-pressure channels and the refrigerant low-pressure channels are all formed by stacking a plurality of stacked heat exchange laminations, a single medium channel is formed between adjacent heat exchange laminations, and different media in the medium channels of adjacent layers are subjected to convection forced heat exchange through the heat exchange laminations;

[0037] One end of the coolant channel is connected to the water inlet pipe G1, and the other end is connected to the water outlet pipe G2, so that the coolant is connected to the water-cooled condensing module; one end of the refrigerant channel is connected to the refrigerant inlet S1, and the other end is connected to one end of the refrigerant high-pressure channel through the through hole on the middle connecting plate, and the other end of the refrigerant high-pressure channel is connected to the refrigerant high-pressure outlet S2; one end of the refrigerant low-pressure channel is connected to the refrigerant low-pressure inlet S3, and the other end is connected to the refrigerant low-pressure outlet S4;

[0038] A liquid storage chamber S5 and a drying bottle 4 are provided on one side of the heat recovery module 2 away from the middle connecting plate. The liquid storage chamber S5 is provided between the refrigerant high-pressure channel and the refrigerant high-pressure outlet, and is used to store supercooled liquid refrigerant. The drying bottle 4 is connected to the heat recovery module through a bracket, and a drying channel is provided in the bracket to connect the drying bottle with the liquid storage chamber. A filter screen 2-3 is provided on the refrigerant high-pressure outlet.

[0039] The coolant in the coolant channel cools the high-pressure refrigerant in the water-cooled condenser module. The water-cooled high-pressure refrigerant enters the refrigerant high-pressure channel of the heat recovery module. The low-pressure refrigerant in the refrigerant low-pressure channel evaporates for the second time and absorbs heat 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 condensing module away from the middle connecting plate, and 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 middle 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; a liquid storage cavity S5 is arranged on the inner side of the liquid storage top plate 2-1; a refrigerant inlet, a refrigerant high-pressure outlet, a refrigerant low-pressure inlet, and a refrigerant low-pressure outlet are all arranged on the liquid storage top plate; a circular insert 2-4 is arranged on the refrigerant inlet, and the circular insert 2-4 passes through the heat recovery module and the middle connecting plate to connect the refrigerant inlet with the refrigerant channel of the water-cooled condensing module.

[0042] The heat exchange stack is provided with concave and convex deformation areas, and two adjacent heat exchange stacks are stacked in an alternating manner. The contact parts of adjacent stacks are brazed and welded together to form a heat exchange inner cavity in the middle; a plurality of through holes are provided around the heat exchange stack, and the heat exchange inner cavities formed between the plurality of heat exchange stacks are grouped and connected through the through holes to form two groups of alternatingly stacked channels, thereby forming a coolant channel and a refrigerant channel in the water-cooled condensation module, and 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 heat recovery module 2, and the other side of the intermediate connecting plate 3 is simultaneously connected to the back of the lower bottom plate 1-1 of the water-cooled condensing module, and the water-cooled condensing module 1 and the heat recovery module 2 are simultaneously connected through the two sides of the intermediate connecting plate 3. The high-pressure refrigerant side of the heat recovery module and the refrigerant side of the water-cooled condensing module are mutually connected only through the elliptical hole S130 in the intermediate connecting plate 3. In addition, one end of the circular plug 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 the brazing process. The circular plug 2-4 integrally penetrates the elliptical hole inside the heat recovery 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 plug 2-4 stops at the diverter channel stack F7 of the water-cooled condensing module. The outer radius of the circular insert 2-4 is smaller than the short axis of the elliptical hole through which it passes, so that the medium-temperature and high-pressure gaseous refrigerant after the first condensation in the water-cooled condensing module flows into the heat recovery module for further cooling; at the same time, the outer radius of the circular insert 2-4 is consistent with the radius of the corresponding circular hole on the bypass channel stack F7 of the water-cooled condensing module inserted through, and the circular hole flange of the bypass channel stack F7 is welded together with the circular insert 2-4 during the brazing process, so that the bypass channel stack 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 middle connecting plate; the through holes S314 and S414 of the upper top plate connecting plate 1-4 correspond to the inlet pipe G1 and the outlet pipe G2 for circulating the cooling liquid, respectively, wherein the supercooling area of ​​the water-cooled condensing module is designed to be located on the high-pressure side of the heat recovery module, that is, the heat exchange area constructed by the interconnection of the through holes S128, S127, S126, S125, and S121 in the heat recovery module and the through holes S227, S226, S225, and S221. Figure 4 , Figure 5 As shown, it can be seen from the multiple heat exchange stacks 1-2 and the upper top plate 1-4 that the space connected by the left channels of the heat exchange stacks of the water-cooled condensing module is the coolant circulation and heat exchange area, and the space connected by the right through holes of the heat exchange stacks 1-2 is the refrigerant circulation and heat exchange area of ​​the water-cooled condensing module.

[0045] like Figures 4-5As shown, a bracket 2-2 is provided on one side of the liquid storage top plate 2-1, which can be matched and sealed with a drying bottle 4 with a plurality of desiccant particles 4-1 placed inside. The drying bottle 4 is connected and sealed with the bracket 2-2 by a combination of threads and a sealing ring. The filter screen 2-3 can be inserted into the through hole S221 on the inner side of the refrigerant high-pressure outlet port of the liquid storage top plate 2-1 through the through hole S1 on the outer surface of the liquid storage top plate 2-1. If the system performance is affected by serious clogging due to foreign matter during operation, the filter screen 2-3 can be removed with a tool and replaced with a new one.

[0046] Combination Figure 4 , Figure 5 , Figure 6 The upper connecting plate 2-5 and the liquid storage top plate 2-1 are assembled and welded together in an up-and-down manner to form an internal liquid storage chamber S5. The liquid storage chamber S5 is interconnected 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 be stored in the liquid storage chamber S5. When the system needs to circulate more refrigerant, the liquid refrigerant stored in the liquid storage chamber S5 flows out through the refrigerant high-pressure outlet end S221 of the heat recovery module, passes through S2 and enters the expansion valve to participate in the system circulation. Figure 2 , Figure 5 It can be understood that the outer surface of the liquid storage top plate 2-1 is provided with a refrigerant inlet S1, a refrigerant high-pressure outlet S2, a refrigerant low-pressure inlet S3, and a refrigerant low-pressure outlet S4, and the surface is connected to other components by an end face sealing method; Figure 6 As shown in the partial enlarged view A3, the outside of the low-pressure outlet S4 of the refrigerant has a groove 211 for placing the sealing ring of the end face seal, and the other three outer pipe openings have similar design structures. The inner side of the liquid storage top plate 2-1 is provided with through holes S121, through holes S221, through holes S321, and through holes 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. The four through holes of the two plates are independent of each other and are not connected to each other at this position.

[0047] like Figure 7 As shown, the liquid storage cavity S5 in the liquid storage top plate 2-1 is interconnected with the drying bottle 4 through the through hole in the bracket 2-2 next to it. The excess refrigerant can be stored in the drying bottle 4 through this channel. At the same time, the desiccant located inside the drying bottle absorbs moisture in the refrigerant, which can prevent moisture ice blockage from affecting the function of the expansion valve.

[0048] like Figure 1 , Figure 4 , Figure 5 , Figure 6As shown, the high-temperature and high-pressure gas coming out of the compression and discharge side of the compressor can enter the inner through hole S121 through the outer refrigerant inlet S1 of the liquid storage top plate 2-1 of the heat recovery module, and then enter the circular insert 2-4. The refrigerant in this state will not enter the heat exchange area of ​​the heat recovery module. After that, the gas in this state directly enters the water-cooled condensation module through the inside of the circular insert 2-4. At this time, this high-temperature and high-pressure gas refrigerant is condensed in the water-cooled condensation module and becomes a medium-temperature and high-pressure gas refrigerant, and then passes through the through hole of the water condensation module 1. The hole S111 and the elliptical through hole S130 of the middle connecting plate 3 then enter the heat exchange area on the high-pressure side of the heat recovery module, where the medium-temperature and high-pressure gas refrigerant absorbs heat in this area through the low-temperature and low-pressure refrigerant on the low-pressure side of the heat recovery module and becomes a medium-temperature and high-pressure supercooled liquid refrigerant. The liquid refrigerant flows out from the through hole S221 of the liquid storage top plate 2-1, and 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 through hole S221 of the liquid storage top plate 2-1 and its liquid storage cavity S5.

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

[0050] The coolant flow direction of the water-cooled condensing module intersects with the refrigerant flow direction to enhance the heat exchange efficiency. The lower temperature coolant flows from the water inlet pipe G1 through the through hole S314 and the through hole S313 into the through hole S312 inside the water-cooled condensing module, and flows from the through hole S312 end to the through hole S412 in the heat exchange stack. In this process, the low temperature coolant is converted into a higher temperature coolant due to heat exchange with the high temperature refrigerant. At this time, the high temperature and high pressure refrigerant is cooled by the coolant and converted into a medium temperature and high pressure state. Then, the heated coolant passes through the through hole S413 and the through hole S414 successively, 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 heat recovery 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 stack 1-2 or heat exchange stack 2-7 is composed of a composite aluminum plate of a certain thickness, which is continuously stamped by a die to form a plurality of concave-convex deformation feature curved surface areas and a flat area without deformation feature, and its surroundings are stamped flange structures for assembly positioning and subsequent brazing sealing (such as Figure 8 The heat exchange stack P1 region 106 and the heat exchange stack P2 region 206), the heat exchange stack surface usually has three or four through holes, the heat exchange stack with three through holes is the heat exchange stack for changing the internal medium flow of the plate exchanger.

[0053] like Figure 7 , Figure 8 As shown, multiple heat exchange laminations are stacked together in an interlaced manner. The laminations with both concave-convex features and planar features inside can form two unconnected medium heat exchange areas after being stacked. Figure 6 As shown in the partial enlarged figure A2, the heat exchange area is composed of heat exchange laminates F1, heat exchange laminates F2, heat exchange laminates F3, heat exchange laminates F4, and heat exchange laminates F5 stacked and brazed, wherein the heat exchange laminates F1 and heat exchange laminates F2 are welded to form a heat exchange inner cavity C5, and the heat exchange laminates F3 and heat exchange laminates F4 are welded to form a heat exchange inner cavity C6. The heat exchange inner cavity C5 and the heat exchange inner cavity C6 are cooling liquid circulation areas that are mutually interconnected on the outside; and the inner cavity C7 formed by welding the heat exchange laminates F2 and the heat exchange inner cavity F3 and the heat exchange inner cavity C8 formed by welding the heat exchange inner cavity F4 and the heat exchange inner cavity F5 are the heat exchange areas of the refrigerant in the water-cooled condensing module.

[0054] On the heat recovery module side, similar to the water condensation module side, the heat exchange area is composed of heat exchange stacks P1, heat exchange stacks P2, heat exchange stacks P3, heat exchange stacks P4, and heat exchange stacks P5 stacked and brazed, wherein the heat exchange stacks P1 and P2 are welded to form a heat exchange inner cavity C1, and the heat exchange stacks P3 and P4 are welded to form a heat exchange inner cavity C2. The heat exchange inner cavity C1 and the heat exchange inner cavity C2 are the low-pressure refrigerant side of the heat regenerator that are interconnected on the outside; and the heat exchange inner cavity C3 formed by welding the heat exchange stacks P2 and P3 and the heat exchange inner cavity C4 formed by welding the heat exchange stacks P4 and P5 are the heat exchange areas on the high-pressure refrigerant side of the heat recovery module.

[0055] Combination Figure 8Take the heat exchange stack welding and medium channel as an example. As shown in the figure, the heat exchange stack P1 is placed under the heat exchange stack P2 and assembled together. At this time, the through holes S127, S227, S327, and S427 in the heat exchange stack P1 correspond to the through holes S127', S227', S327', and S427' of the heat exchange stack P2 respectively. Because there are many concave and convex deformation areas and non-deformation areas in the heat exchange stack, such as the convex ribs 102 in the heat exchange stack P1 and the convex ribs 202 in the heat exchange stack P2 are staggered and abutted against each other to form an internally interconnected hollow cavity. After the hollow cavity is connected to a through hole channel of the heat exchange stack, the medium can flow. The inner side of the flanged area 106 around the heat exchange stack P1 and the outer side of the flanged area 206 around the heat exchange stack are in contact with each other and welded together to prevent the medium from leaking out. After the two heat exchange stacks are overlapped, the back sides of the upwardly protruding areas 104 and 105 in the heat exchange stack P1 will partially contact and weld with the flat area 207 in the heat exchange stack P2. At this time, the fluid circulating between the through holes S127, S227 and S127', S227' will not be able to flow into the internal cavity constructed by the stacking of the heat exchange stack P1 and the heat exchange stack P2, but can only flow into the upper and lower adjacent cavities for heat exchange.

[0056] In addition, the upward protruding deformation areas 204 and 205 in the heat exchange stack P2 will contact and support the corresponding positions of the heat exchange stacks assembled thereon, and the contact parts will be welded together after subsequent brazing. The inward local deformation area 107 of the heat exchange stack P1 contacts and supports the corresponding positions of the heat exchange stack P2 and supports the two stacks at a reasonable safety distance to avoid extrusion deformation, thereby resulting in an open channel formed by the non-contact between the undeformed area 101 near the through hole S327 of the heat exchange stack P1 and the inwardly deformed area 201 near the through hole S327' of the heat exchange stack P2. The medium flowing through the through hole can flow into the internal cavity constructed by the heat exchange stack P1 and the heat exchange stack P2 stacked together for heat exchange, and then the heat exchanged medium can flow out from the open channel formed by the non-contact between the undeformed area 103 near the through hole S427 of the heat exchange stack P1 and the inwardly deformed area 203 near the through hole S427' of the heat exchange stack P2. In general, the medium flowing through the through holes S327, S327' and S427, S427' of the heat exchange stacks P1 and P2 can enter the cavity constructed between the two heat exchange stacks for heat exchange through the opening channels formed on the left sides of the two heat exchange stacks, while the medium flowing on this side cannot flow into the upper and lower adjacent cavities for heat exchange.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. An integrated plate heat exchanger with liquid storage multifunction, characterized in that: It includes a water-cooled condensing module and a heat recovery module respectively arranged on both sides of the middle connecting plate; The water-cooled condensing module is provided with cooling liquid channels and refrigerant channels which are alternately stacked with each other; the heat recovery module is provided with refrigerant high-pressure channels and refrigerant low-pressure channels which are alternately stacked with each other; the cooling liquid channels and refrigerant channels, the refrigerant high-pressure channels and the refrigerant low-pressure channels are all formed by stacking a plurality of stacked heat exchange laminations, a single medium channel is formed between adjacent heat exchange laminations, and different media in the medium channels of adjacent layers are heat exchanged through the heat exchange laminations; One end of the coolant channel is connected to the water inlet pipe, and the other end is connected to the water outlet pipe, so that the coolant 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 connected to one end of the refrigerant high-pressure channel through the through hole on the middle connecting plate, and the other end of the refrigerant high-pressure channel is connected to the refrigerant high-pressure outlet; one end of the refrigerant low-pressure channel is connected to the refrigerant low-pressure inlet, and the other end is connected to the refrigerant low-pressure outlet; The heat recovery module is provided with a liquid storage chamber and a drying bottle on one side away from the middle connecting plate. The liquid storage chamber is provided between the refrigerant high-pressure channel and the refrigerant high-pressure outlet and is used to store supercooled liquid refrigerant. The drying bottle is connected to the heat recovery module through a bracket. The bracket is provided with a drying channel connecting the drying bottle with the liquid storage chamber. A filter screen is provided on the refrigerant high-pressure outlet. The coolant in the coolant 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 evaporates for the second time and absorbs heat 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.

2. The integrated plate heat exchanger with liquid storage multifunction 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 middle connecting plate, and 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 middle connecting plate.

3. The integrated plate heat exchanger with liquid storage multifunction according to claim 2 is characterized in that: The heat recovery module comprises a connecting plate on a liquid storage top plate, an upper top plate, a plurality of stacked heat exchange laminations, and a lower bottom plate, which are sequentially stacked and brazed into one; the lower bottom plate is fixedly connected to the middle connecting plate; The liquid storage chamber is arranged on the inner side of the liquid storage top plate; the refrigerant inlet, refrigerant high-pressure outlet, refrigerant low-pressure inlet, and refrigerant low-pressure outlet are all arranged on the liquid storage top plate; a circular insert is provided on the refrigerant inlet, and the circular insert passes through the middle connecting plate to connect the refrigerant inlet with the refrigerant channel.

4. The integrated plate heat exchanger with liquid storage multifunction according to claim 2, characterized in that: The water-cooled condensing module includes a lower base plate, a plurality of heat exchange laminations, an upper top plate, and an upper top plate connecting plate which are sequentially stacked and brazed together; the lower base plate is fixedly arranged on the middle 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 multifunction according to claim 1, characterized in that: The heat exchange stack is provided with concave and convex deformation areas, and two adjacent heat exchange stacks are staggered and stacked forward and backward to form a heat exchange inner cavity in the middle; a plurality of through holes are provided around the heat exchange stack, and the heat exchange inner cavity formed between the plurality of heat exchange stacks is grouped and connected through the through holes to form two groups of alternatingly stacked channels, thereby forming the coolant channel and the refrigerant channel in the water-cooled condensation module, and forming the refrigerant high-pressure channel and the refrigerant low-pressure channel in the heat recovery module.

6. The integrated plate heat exchanger with liquid storage multifunction according to claim 1, characterized in that: A plurality of desiccant particles are arranged in the drying bottle, and the filter screen is detachably mounted on the refrigerant high-pressure outlet.

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

Images