Novel flat tube double-row type heat exchanger for electric automobile

Abstract

The utility model discloses a novel flat pipe double-row type heat exchanger for an electric automobile. The novel flat pipe double-row type heat exchanger comprises a heat exchanger core assembly, a heat exchanger shell, a collector plate, a water outlet pipe connector, a water inlet pipe connector, a first end cover, a second end cover, a first cavity, a second cavity and baffle flat plates. The heat exchanger core assembly is provided with a collector plate, a baffle flat plate and a flat pipe, wherein a flat pipe plain end groove and a collector plate clamping groove are formed in the two ends of the flat pipe. The novel flat tube double-row type heat exchanger for the electric automobile is provided with two cooling fluid three-layer heat exchange flow paths, namely a fluid side tube pass loop I and a fluid side tube pass loop II; and two paths of refrigerant fluid heat exchange loops, namely a refrigerant side shell pass loop I and a refrigerant side shell pass loop II, are also arranged. The product has the working characteristics of large output flow, high heat exchange efficiency, good sealing performance, safety and reliability, is easy to assemble and convenient to maintain, and is particularly suitable for an electric vehicle heat management system with higher requirements on modularization, light weight and integration.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric automobile device, accessory technical field, concretely relates to a new type flat tube double row heat exchanger for electric automobile. BACKGROUND

[0002] With the rapid development of new energy automobile industry, especially the dynamic performance requirement of electric automobile intelligent cabin and power battery pack cooling system and electric drive module cooling system to electric automobile thermal management system is also higher and higher. The heat exchanger is the key component in the electric automobile thermal management system, and its performance significantly affects the efficiency of the electric automobile thermal management system. The flat tube double row heat exchanger has the working characteristics of large flow, high heat exchange efficiency, good sealing and safety and reliability, and is one of energy-saving, safe and environmentally friendly high-tech electric automobile thermal management system devices. The flat tube double row heat exchanger is compact in structure, easy to assemble and maintain, and high in integration. The flat tube double row heat exchanger is the best choice for electric vehicle (EV) and hybrid electric vehicle (HEV) for electric automobile thermal management system.

[0003] For the early heat exchanger, on the one hand, the traditional air-cooled heat exchanger is noisy, has small output power and low heat exchange efficiency. On the other hand, the finned heat exchanger design is adopted, which is large in space volume and is not conducive to the development of the electric automobile thermal management system to the modularization, light weight and integration trend. In the current technical application, the electric automobile intelligent cabin and power battery pack cooling system and electric drive module cooling system need to match multiple plate heat exchangers, which increases the complexity of the heat exchanger pipeline, leading to the increase of the failure coefficient of the electric automobile thermal management system. The plate heat exchanger has poor compatibility of parts and high manufacturing cost. Therefore, how to provide a long-term use, simple assembly process and lower cost, and adopt a multi-circuit flat tube double row heat exchanger with wider market prospect. SUMMARY

[0004] In view of the problems of the above heat exchanger, the utility model aims at providing a new type flat tube double row heat exchanger for electric automobile, which can meet the structural strength of flat tube double row heat exchanger, the modularization and integration design requirements of thermal management system, realize lower energy consumption, high heat exchange efficiency, low noise, large flow and stable output of flat tube double row heat exchanger, and ensure efficient operation of electric automobile thermal management system.

[0005] The flat tube double-row heat exchanger for electric vehicles comprises a heat exchanger core assembly, a heat exchanger shell, a header, a water outlet joint, a water inlet joint, an end cover one, an end cover two, a cavity one, a cavity two, and a baffle; the heat exchanger core assembly is provided with the header, the baffle, and flat tubes, wherein the flat tubes are provided with flat tube flat mouth grooves and header clamping grooves at both ends, each of the flat tube flat mouth grooves is provided with a header, and the header is clamped in the header clamping groove; the heat exchanger core assembly is arranged in the two cavities of the heat exchanger shell in sequence, the end cover one and the end cover two are assembled on the four headers in sequence, the end cover two is located on the header on the same end face of the cavity two of the heat exchanger shell, and the end cover one is located on the header on the same end face of the cavity one of the heat exchanger shell; the top outer side plane of the end cover one is assembled with a water inlet joint, and the top outer side plane of the end cover two is assembled with a water outlet joint; the flat tube flat mouth grooves, the flat tubes, and the headers are sealed by brazing, the end cover one and the end cover two are fixed with the headers and the heat exchanger shell by welding, the cavity one and the cavity two are fixed with the refrigerant inlet joint and the refrigerant outlet joint by welding, the heat exchanger shell is provided with sealing plates symmetrically arranged with the refrigerant inlet joint and the refrigerant outlet joint on both end faces, and the sealing plates and the heat exchanger shell are fixed by welding, and four shock absorbing pad assemblies are clamped on the base of the heat exchanger shell.

[0006] The novel flat-tube double-row heat exchanger for electric vehicles is provided with two cooling fluids (such as water, a mixture of water and ethylene glycol, or insulating heat transfer oil) and three heat exchange flow paths, namely fluid-side tube-side loop one and fluid-side tube-side loop two; it is also provided with two refrigerant fluids (such as R134a, R1234yf, or R744) heat exchange circuits, namely refrigerant-side shell-side loop one and refrigerant-side shell-side loop two. The fluid-side tube-side loop one is configured as a three-layer heat exchange flow path for cooling fluid, consisting of an inlet pipe joint, an end cap one with a baffle plate, a manifold, a flat tube with a flat tube flow channel, an end cap two with a baffle plate, and an outlet pipe joint; similarly, the fluid-side tube-side loop two is also configured as a three-layer heat exchange flow path for cooling fluid, consisting of an inlet pipe joint, an end cap one with a baffle plate, a manifold, a flat tube with a flat tube flow channel, an end cap two with a baffle plate, and an outlet pipe joint; the refrigerant-side shell-side loop... Loop 1 is a refrigerant fluid heat exchange circuit consisting of a refrigerant inlet connector, a heat exchanger shell with a second refrigerant inlet via, a baffle plate, a heat exchanger shell with a second refrigerant outlet via, a manifold, a sealing plate, and a refrigerant outlet connector. Loop 2 on the refrigerant side is also a refrigerant fluid heat exchange circuit consisting of a refrigerant inlet connector, a heat exchanger shell with a first refrigerant inlet via, a baffle plate, a heat exchanger shell with a first refrigerant outlet via, a manifold, a sealing plate, and a refrigerant outlet connector. This mechanism is simple, compact, compatible, easy to assemble, and convenient to maintain.

[0007] The above-mentioned technical problem of this utility model is solved by the following technical solution:

[0008] A novel flat-tube double-row heat exchanger for electric vehicles, characterized by comprising: a sealing plate, pre-drilled screw holes, a water inlet pipe connector, end cap one, fluid-side tube-side loop one, end cap two, a water baffle plate, a water outlet pipe connector, cavity one, fluid-side tube-side loop two, cavity two, a heat exchanger shell, a baffle plate, a triangular groove, a U-shaped groove, a manifold slot, a baffle plate flow hole one, a baffle plate flow hole two, a refrigerant outlet connector, a manifold, a refrigerant inlet through hole one, a refrigerant inlet through hole two, a refrigerant outlet through hole one, a refrigerant outlet through hole two, a heat exchanger core assembly, a corrugated boss, a flat tube, a flat tube flat-mouth groove, a refrigerant inlet connector, a refrigerant-side shell-side loop one, a refrigerant-side shell-side loop two, a flat tube flow channel, and a shock-absorbing pad assembly.

[0009] The heat exchanger core assembly is provided with the flat tube, the header, and the baffle plate; the flat tube is provided with the flat tube flow channel, the flat tube is provided with the wave-shaped boss on both sides, and the flat tube is provided with the header clamping groove and the flat tube flat slot at both ends; the total number of the wave-shaped bosses provided on both sides of the flat tube ranges from 30 to 80; the baffle plate is provided with the triangular boss and the U-shaped boss matched with the triangular groove and the U-shaped groove; the baffle plate is further provided with the baffle plate flow hole one and the baffle plate flow hole two; the number of through holes provided on the baffle plate flow hole one ranges from 6 to 22; the number of through holes provided on the baffle plate flow hole two ranges from 2 to 12; the diameter of the holes on the baffle plate flow hole two is 0.5 times the diameter of the holes on the baffle plate flow hole one; the hole shape of the baffle plate flow hole one and the baffle plate flow hole two includes a round hole, a rectangular hole, a polygonal hole, an oval hole, and a U-shaped hole; the heat exchanger shell is provided with the refrigerant inlet through hole one, the refrigerant inlet through hole two, the refrigerant outlet through hole one, the refrigerant outlet through hole two, the triangular groove, and the U-shaped groove; the heat exchanger shell is provided with the reserved screw hole on the top outer side plane; the heat exchanger shell is provided with the cavity one and the cavity two on both side end faces; the cavity one is sealed and welded with the refrigerant inlet joint inside the cavity, and the cavity two is sealed and welded with the refrigerant outlet joint inside the cavity; the header is provided with a through hole corresponding to the flat tube flat slot; each flat tube flat slot is provided with a header; the header is pressed and assembled in the header clamping groove; the heat exchanger core assembly is sequentially arranged in the two cavities of the heat exchanger shell; the heat exchanger core assembly is coupled and fixed in the cavity of the heat exchanger shell through the triangular boss and the U-shaped boss on the baffle plate matched with the triangular groove and the U-shaped groove; the flat tube, the flat tube flat slot, and the header are sealed by brazing; the assembly of the heat exchanger core assembly and the heat exchanger shell is completed.

[0010] The lower part of the top outer side plane of the second end cover is assembled and connected with a water outlet connector, which is sealed and fixed with the second end cover by welding, and the internal cavity of the second end cover is assembled with a water baffle; the upper part of the top outer side plane of the first end cover is assembled and connected with a water inlet connector, which is sealed and fixed with the first end cover by welding, and the internal cavity of the first end cover is also assembled with a water baffle; the first end cover and the second end cover are respectively assembled on four collecting plates, the second end cover is located on the collecting plate at the same end face position of the second cavity provided on the heat exchanger shell, and the first end cover is located on the collecting plate at the same end face position of the first cavity provided on the heat exchanger shell, and the first end cover and the second end cover are sealed and fixed with the collecting plate and the heat exchanger shell by welding; the heat exchanger shell is provided with sealing plates symmetrically arranged with respect to the refrigerant inlet connector and the refrigerant outlet connector on the two side end faces of the heat exchanger shell, and the sealing plates are also sealed and fixed with the heat exchanger shell by welding; and four shock absorbing pad assemblies are press-fitted on the base of the heat exchanger shell.

[0011] A novel flat tube double-row heat exchanger for electric vehicles is provided with two cooling fluid (such as water, a mixture of water and glycol, or insulating heat-conducting oil) three-layer heat exchange flow paths, which are referred to as fluid-side tube path one and fluid-side tube path two, and two refrigerant fluid (such as R134a, R1234yf, or R744) heat exchange paths, which are referred to as refrigerant-side shell path one and refrigerant-side shell path two.

[0012] The fluid-side tube path one is provided as a cooling fluid three-layer heat exchange flow path composed of the water inlet connector, the first end cover and the water baffle assembled thereon, the collecting plate, the flat tube and the flat tube flow channel provided on the flat tube, the second end cover and the water baffle assembled thereon, and the water outlet connector.

[0013] The fluid-side tube path two is also provided as a cooling fluid three-layer heat exchange flow path composed of the water inlet connector, the first end cover and the water baffle assembled thereon, the collecting plate, the flat tube and the flat tube flow channel provided on the flat tube, the second end cover and the water baffle assembled thereon, and the water outlet connector.

[0014] The refrigerant-side shell path one is provided as a refrigerant fluid heat exchange path composed of the refrigerant inlet connector, the heat exchanger shell and the refrigerant inlet via two provided on the heat exchanger shell, the baffle plate, the heat exchanger shell and the refrigerant outlet via two provided on the heat exchanger shell, the collecting plate, the sealing plate, and the refrigerant outlet connector.

[0015] The refrigerant side shell passage circuit two is formed by the refrigerant inlet joint, the heat exchanger shell and the refrigerant inlet through hole one arranged on the heat exchanger shell, the baffle plate, the heat exchanger shell and the refrigerant outlet through hole one arranged on the heat exchanger shell, the collecting plate, the sealing plate and the refrigerant outlet joint.

[0016] The fluid side tube passage circuit one and the refrigerant side shell passage circuit one form a group of closed loop heat exchange circuits, and the fluid side tube passage circuit two and the refrigerant side shell passage circuit two form another group of closed loop heat exchange circuits.

[0017] The utility model greatly reduces the quantity of matching heat exchangers and related parts in the thermal management system module, and the design of the high-standard and extruded profile parts is conducive to the modularization and integration of the thermal management system, thereby greatly reducing the cost of the thermal management system module.

[0018] In summary, the utility model has the following beneficial effects:

[0019] 1. The multi-layer flat tube stacking assembly structure is innovatively designed, the multi-layer flat tube stacking structure has very superior vibration resistance, the technical scheme of the wave-shaped boss is adopted to enhance the overall structural strength of the flat tube and eliminate fatigue damage caused by the flow impact of the three-layer heat exchange flow path of the cooling fluid and the vibration of the mechanism, and the flat tube double-row heat exchanger realizes low-noise and stable operation.

[0020] 2. The novel structure of the flat tube is characterized in that the novel structure design of the wave-shaped boss causes the cooling fluid to continuously deflect during the flow along the wall surface of the wave-shaped boss, thereby forming a partial turbulent flow state, the fluids in different parts and different flow states participate in heat exchange, the heat transfer coefficient is greatly improved, and the heat exchange efficiency of the flat tube double-row heat exchanger is greatly improved.

[0021] 3. The structure design of the wave-shaped boss directly increases the heat exchange area of the flat tube compared with the flat straight-through heat exchange tube, thereby further improving the heat exchange efficiency of the flat tube double-row heat exchanger.

[0022] 4. The flat tube flow passages of the key components of the two cooling fluid three-layer heat exchange flow paths are completely immersed in the refrigerant fluid heat exchange circuits arranged on the two paths, the design of the three-layer heat exchange flow path enables the cooling fluid and the refrigerant fluid to realize sufficient heat exchange, the time of the cooling fluid participating in heat exchange in the flat tube is increased, and the heat exchange efficiency of the flat tube double-row heat exchanger is further improved.

[0023] 5, The utility model discloses only need to change the axial length of heat exchanger casing, heat exchanger core assembly, very easy to obtain the heat exchange power parameter required to flat tube double row heat exchanger, greatly shorten the product development cycle, and relevant parts good universality reduces the product assembly complexity, and significantly improves the finished product assembly qualified rate.

[0024] 6, The utility model discloses greatly reduce the quantity of heat exchanger and its relevant parts in the heat management system module, and the design adopts the parts of good universality and being formed by extruded section bar, is favorable to the cost of heat management system module is reduced greatly;

[0025] 7, The utility model discloses the reserved screw hole position with heat exchanger casing as the carrier for the assembly electronic water pump, solenoid valve, kettle and the relevant parts of the heat management system module, is favorable to the high integration of heat management system module is realized;

[0026] 8, The utility model discloses compact structure, good sealing, high integration, lower cost, especially suitable for the higher requirement of modularization, light weight, integration of electric automobile heat management system. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings incorporated in the specification and forming a part thereof show embodiments of the present utility model and, together with its description, serve to explain the principle of the present utility model.

[0028] Figure 1 It is the overall assembly profile front structure of the utility model and the refrigerant side shell circuit two flow direction schematic drawing;

[0029] Figure 2 It is the overall assembly profile front structure of the utility model and the refrigerant side shell circuit two flow direction schematic drawing;

[0030] Figure 3 It is the overall assembly profile front structure of the utility model and the refrigerant side shell circuit two flow direction schematic drawing;

[0031] Figure 4 It is the overall assembly profile front structure of the utility model and the refrigerant side shell circuit two flow direction schematic drawing;

[0032] Figure 5 It is the overall assembly profile front structure of the utility model and the refrigerant side shell circuit two flow direction schematic drawing;

[0033] Figure 6 It is the overall assembly profile front structure of the utility model and the refrigerant side shell circuit two flow direction schematic drawing;

[0034] Figure 7 It is the overall assembly profile front structure of the utility model and the refrigerant side shell circuit two flow direction schematic drawing;

[0035] Figure 8 The two-way refrigerant side shell circuit hole position arrangement schematic view of the utility model is shown in the description.

[0036] In the drawing: 2. sealing plate; 8. reserved screw hole position; 9. water inlet pipe joint; 10. end cover one; 11. fluid side pipe circuit one; 12. end cover two; 15. water-proof plate; 16. water outlet pipe joint; 20. cavity one; 21. fluid side pipe circuit two; 30. cavity two; 40. heat exchanger shell; 41. baffle plate; 42. triangular groove; 43. U-shaped groove; 46. collecting plate clamping groove; 47. baffle plate flow hole one; 48. baffle plate flow hole two; 50. refrigerant outlet joint; 60. collecting plate; 66. refrigerant inlet through hole one; 67. refrigerant inlet through hole two; 68. refrigerant outlet through hole one; 69. refrigerant outlet through hole two; 70. heat exchanger core assembly; 73. wave-shaped boss; 76. flat tube; 77. flat tube flat groove; 80. refrigerant inlet joint; 81. refrigerant side shell circuit one; 82. refrigerant side shell circuit two; 85. flat tube flow channel; 90. shock-absorbing pad assembly. DETAILED DESCRIPTION

[0037] The utility model will be further described below in combination with the drawings. It should be noted that: unless otherwise specified, the relative arrangement, numerical value of the components and steps set forth in these embodiments do not limit the scope of the utility model.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting of the scope of the utility model and its applications or uses. In the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of exemplary embodiments can have different values. It should be noted that like numbers and letters in the drawings represent like items, and therefore, once an item is defined in one drawing, it is not necessary to discuss it further in subsequent drawings.

[0039] The terms "comprise", "set as", "provided with", "provided as", "set as", "refer to", "set", and any variations of them in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices;

[0040] In the description of the utility model, it is understood that the directions or position relations indicated by the terms "middle", "length", "upper", "lower", "side", "two sides", "axial", "top", "closed loop", "circuit", "flow path", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model; unless otherwise explicitly specified and limited; in addition, the terms "press fitting", "assembly", "coupling", "welding", "fixing" and the like should be understood broadly, for example, can be fixedly coupled, can be detachably coupled, or integrally connected; can be mechanically coupled, or electrically coupled; can be directly connected, or indirectly connected through an intermediate medium, or can be connected internally between two elements.

[0041] The utility model discloses a novel flat tube double row heat exchanger for electric automobile, including, the sealing plate 2, the reserved screw hole 8, the water inlet pipe joint 9, the end cover one 10, the fluid side pipe circuit one 11, the end cover two 12, the water baffle 15, the water outlet pipe joint 16, the cavity one 20, the fluid side pipe circuit two 21, the cavity two 30, the heat exchanger casing 40, the baffling flat plate 41, the triangular recess 42, the U-shaped recess 43, the current collection plate clamping groove 46, the baffling flat plate flow hole one 47, the baffling flat plate flow hole two 48, the refrigerant outlet joint 50, the current collection plate 60, the refrigerant import through hole one 66, the refrigerant import through hole two 67, the refrigerant outlet through hole one 68, the refrigerant outlet through hole two 69, the heat exchanger core assembly 70, the wave crest 73, the flat tube 76, the flat tube flat mouth groove 77, the refrigerant import joint 80, the refrigerant side shell circuit one 81, the refrigerant side shell circuit two 82, the flat tube flow channel 85, the shock pad assembly 90.

[0042] The utility model discloses the heat exchanger core assembly 70 shown in the drawing of the utility model is provided with flat tube 76, current collection plate 60, baffling flat plate 41;Flat tube 76 is equipped with flat tube flow channel 85, and the both sides of flat tube 76 are equipped with wave crest 73, and the both ends of flat tube 76 are equipped with flat tube flat mouth groove 77, current collection plate clamping groove 46, and the total number range of wave crest 73 equipped with the both sides of flat tube 76 is 30 to 80;

[0043] The baffle flat plate 41 shown in the utility model drawings is provided with a triangular boss matched with the triangular groove 42 and the U-shaped groove 43, and the baffle flat plate 41 is further provided with a baffle flat plate flow hole one 47 and a baffle flat plate flow hole two 48, the baffle flat plate flow hole one 47 is provided with a number of through holes ranging from 6 to 22, the baffle flat plate flow hole two 48 is provided with a number of through holes ranging from 2 to 12, the hole diameter of the baffle flat plate flow hole two 48 is 0.5 times of the hole diameter of the baffle flat plate flow hole one 47, and the hole shape of the baffle flat plate flow hole one 47 and the baffle flat plate flow hole two 48 comprises a round hole, a rectangular hole, a polygonal hole, an oval hole and a U-shaped hole.

[0044] The heat exchanger shell 40 shown in the utility model drawings is provided with a refrigerant inlet via hole one 66, a refrigerant inlet via hole two 67, a refrigerant outlet via hole one 68, a refrigerant outlet via hole two 69, a triangular groove 42 and a U-shaped groove 43, and the top outer side plane of the heat exchanger shell 40 is provided with a reserved screw hole position 8, the two side end faces of the heat exchanger shell 40 are respectively provided with a cavity one 20 and a cavity two 30, the cavity inside of the cavity one 20 is sealed and welded with a refrigerant inlet joint 80, and the cavity inside of the cavity two 30 is sealed and welded with a refrigerant outlet joint 50; the header 60 is provided with a through hole used for passing through the flat groove 77 of the flat tube.

[0045] The top outer side plane of the end cover two 12 is assembled with a water outlet joint 16 at the lower part, the water outlet joint 16 is sealed and fixed with the end cover two 12 through welding, the cavity inside of the end cover two 12 is assembled with a water baffle 15, the top outer side plane of the end cover one 10 is assembled with a water inlet joint 9 at the upper part, the water inlet joint 9 is sealed and fixed with the end cover one 10 through welding, and the cavity inside of the end cover one 10 is also assembled with a water baffle 15.

[0046] The flat tube double-row heat exchanger for a new type electric vehicle shown in the utility model drawings is provided with two cooling fluid (such as water, a mixture of water and ethylene glycol or insulating heat-conducting oil) three-layer heat exchange flow paths, which are fluid side tube path loop one 11 and fluid side tube path loop two 21; and is also provided with two refrigerant fluid (such as R134a, R1234yf or R744) heat exchange loops, which are refrigerant side shell path loop one 81 and refrigerant side shell path loop two 82.

[0047] The fluid side tube path loop one 11 is set as a cooling fluid three-layer heat exchange flow path composed of the water inlet joint 9, the end cover one 10 and the water baffle 15 assembled on the end cover one 10, the header 60, the flat tube 76 and the flat tube flow channel 85 provided on the flat tube 76, the end cover two 12 and the water baffle 15 assembled on the end cover two 12 and the water outlet joint 16;

[0048] Fluid side tube pass circuit two 21 is also set up as three layers of cooling fluid heat exchange flow path composed of water inlet pipe joint 9, end cover one 10 and the water baffle 15 assembled on it, header plate 60, flat tube 76 and the flat tube flow channel 85 set on it, end cover two 12 and the water baffle 15 assembled on it, water outlet pipe joint 16;

[0049] Refrigerant side shell pass circuit one 81 is set as refrigerant fluid heat exchange circuit composed of refrigerant inlet joint 80, heat exchanger shell 40 and the refrigerant inlet through hole two 67 set on it, baffle flat plate 41, heat exchanger shell 40 and the refrigerant outlet through hole two 69 set on it, header plate 60, sealing plate 2, refrigerant outlet joint 50;

[0050] Refrigerant side shell pass circuit two 82 is set as refrigerant fluid heat exchange circuit composed of refrigerant inlet joint 80, heat exchanger shell 40 and the refrigerant inlet through hole one 66 set on it, baffle flat plate 41, heat exchanger shell 40 and the refrigerant outlet through hole one 68 set on it, header plate 60, sealing plate 2, refrigerant outlet joint 50;

[0051] Fluid side tube pass circuit one 11 and refrigerant side shell pass circuit one 81 constitute a group of closed loop heat exchange circuit, and fluid side tube pass circuit two 21 and refrigerant side shell pass circuit two 82 constitute another group of closed loop heat exchange circuit.

[0052] Further, a corresponding number of flat tube flat groove 77 set on both ends of flat tube 76 is assembled with a header plate 60, and the header plate 60 is pressed and assembled in the groove of header plate clamping groove 46; the component assembly of heat exchanger core assembly 70 is completed.

[0053] Further, the heat exchanger core assembly 70 assembled is arranged in order in the two cavities of heat exchanger shell 40, and the heat exchanger core assembly 70 is coupled and fixed in the cavity of heat exchanger shell 40 through the triangular boss, U-shaped boss set on baffle flat plate 41 aligning triangular groove 42, U-shaped groove 43, and the flat tube 76, flat tube flat groove 77, header plate 60 are sealed by brazing; the component assembly of heat exchanger core assembly 70 and heat exchanger shell 40 is completed.

[0054] Further, the end cover one 10 and the end cover two 12 are sequentially assembled on the four collecting plates 60, the end cover two 12 is located on the collecting plate 60 at the same end face position of the cavity two 30 arranged on the heat exchanger shell 40, and the end cover one 10 is located on the collecting plate 60 at the same end face position of the cavity one 20 arranged on the heat exchanger shell 40, the end cover one 10 and the end cover two 12 are sealed and fixed with the collecting plate 60 and the heat exchanger shell 40 through welding; the sealing plate 2 connected with the refrigerant inlet joint 80 and the refrigerant outlet joint 50 which are symmetrical is assembled on the two side end faces of the heat exchanger shell 40, the sealing plate 2 and the heat exchanger shell 40 are also sealed and fixed through welding, and the four shock absorbing pad assemblies 90 are pressed and assembled on the base of the heat exchanger shell 40.

[0055] The parts formed by the extruded profiles have good compatibility, are easy to assemble, reduce the complexity of product assembly, and significantly improve the finished product assembly qualification rate.

[0056] In addition to the above, although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the utility model; the above embodiments can be modified without departing from the scope and spirit of the utility model, and any technical solution formed by equivalent replacement or equivalent transformation shall fall within the protection scope of the utility model, and the scope of the utility model is defined by the appended claims.

Claims

1. A new type of flat tube double-row heat exchanger for electric vehicles, characterized by, It includes: End plate, reserved screw hole, water inlet pipe joint, end cover one, fluid side tube circuit one, end cover two, water stop, water outlet pipe joint, cavity one, fluid side tube circuit two, cavity two, heat exchanger shell, baffle plate, triangular groove, U-shaped groove, collector plate clamping groove, baffle plate flow hole one, baffle plate flow hole two, refrigerant outlet joint, collector plate, refrigerant inlet through hole one, refrigerant inlet through hole two, refrigerant outlet through hole one, refrigerant outlet through hole two, heat exchanger core assembly, wave-shaped boss, flat tube, flat tube flat groove, refrigerant inlet joint, refrigerant side shell circuit one, refrigerant side shell circuit two, flat tube flow channel, shock pad assembly; The heat exchanger core assembly is provided with the flat tube, the collector plate and the baffle plate; The flat tube is provided with the flat tube flow channel, and the two sides of the flat tube are provided with the wave-shaped boss; The two ends of the flat tube are provided with the collector plate clamping groove and the flat tube flat groove; The baffle plate is provided with the triangular groove and the U-shaped groove; The baffle plate is further provided with the baffle plate flow hole one and the baffle plate flow hole two; The total number of the wave-shaped bosses ranges from 30 to 80; The heat exchanger shell is provided with the triangular groove, the U-shaped groove, the refrigerant inlet through hole one, the refrigerant inlet through hole two, the refrigerant outlet through hole one and the refrigerant outlet through hole two; The top outer side plane of the heat exchanger shell is provided with the reserved screw hole; The two side end faces of the heat exchanger shell are respectively provided with the cavity one and the cavity two; The collector plate is provided with a through hole for passing through the flat tube flat groove; The top outer side plane of the end cover two is assembled and connected with the water outlet pipe joint; The water outlet pipe joint is fixed to the end cover two by welding; The cavity inside the end cover two is assembled with the water stop; The top outer side plane of the end cover one is assembled and connected with the water inlet pipe joint; The water inlet pipe joint is fixed to the end cover one by welding; The cavity inside the end cover one is also assembled with the water stop; A new type of flat tube double-row heat exchanger for electric vehicles is provided with two cooling fluid three-layer heat exchange flow paths, i.e., the fluid side tube circuit one and the fluid side tube circuit two; and two refrigerant fluid heat exchange circuits, i.e., the refrigerant side shell circuit one and the refrigerant side shell circuit two.

2. A new type of flat tube double-row heat exchanger for electric vehicles according to claim 1, characterized in that, The baffle plate flow hole one is provided with a number of through holes ranging from 6 to 22; The baffle plate flow hole two is provided with a number of through holes ranging from 2 to 12; The hole diameter of the baffle plate flow hole two is 0.5 times that of the baffle plate flow hole one; The hole shape of the baffle plate flow hole one and the baffle plate flow hole two includes a round hole, a rectangular hole, a polygonal hole, an oval hole and a U-shaped hole.

3. A new type of flat tube double-row heat exchanger for electric vehicles according to claim 1, characterized in that, The cavity one is sealed by welding the refrigerant inlet joint, the cavity two is sealed by welding the refrigerant outlet joint, the collector plate is pressed into the slot of the collector plate slot, the flat tube, the flat tube flat slot and the collector plate are sealed by welding, the heat exchanger shell is equipped with the sealing plate symmetrically connected to the refrigerant inlet joint and the refrigerant outlet joint on the two side end faces, the sealing plate and the heat exchanger shell are also fixed by welding, and four shock pad assemblies are pressed on the base of the heat exchanger shell.

4. A new type of flat tube double-row heat exchanger for electric vehicles according to claim 1, characterized in that, The fluid side tube circuit one is a three-layer cooling fluid heat exchange circuit composed of the water inlet pipe joint, the end cover one, the water plate assembled thereon, the collector plate, the flat tube, the flat tube flow channel arranged on the flat tube, the end cover two, the water plate assembled thereon, and the water outlet pipe joint.

5. A new type of flat tube double-row heat exchanger for electric vehicles according to claim 1, characterized in that, The fluid side tube circuit two is also a three-layer cooling fluid heat exchange circuit composed of the water inlet pipe joint, the end cover one, the water plate assembled thereon, the collector plate, the flat tube, the flat tube flow channel arranged on the flat tube, the end cover two, the water plate assembled thereon, and the water outlet pipe joint.

6. A new type of flat tube double-tube heat exchanger for electric vehicles according to claim 1, characterized in that, The refrigerant side shell circuit one is a refrigerant fluid heat exchange circuit composed of the refrigerant inlet joint, the heat exchanger shell, the refrigerant inlet via two arranged on the heat exchanger shell, the baffle plate, the heat exchanger shell, the refrigerant outlet via two arranged on the heat exchanger shell, the collector plate, the sealing plate, and the refrigerant outlet joint.

7. A new type of flat tube double-tube heat exchanger for electric vehicles according to claim 1, characterized in that, The refrigerant side shell circuit two is a refrigerant fluid heat exchange circuit composed of the refrigerant inlet joint, the heat exchanger shell, the refrigerant inlet via one arranged on the heat exchanger shell, the baffle plate, the heat exchanger shell, the refrigerant outlet via one arranged on the heat exchanger shell, the collector plate, the sealing plate, and the refrigerant outlet joint.

8. A new type of flat tube double-tube heat exchanger for electric vehicles according to claim 1, characterized in that, The fluid side tube circuit one and the refrigerant side shell circuit one form a set of closed-loop heat exchange circuits, and the fluid side tube circuit two and the refrigerant side shell circuit two form another set of closed-loop heat exchange circuits.

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