Fin type plate heat exchanger

Abstract

The invention discloses a fin type plate heat exchanger which comprises an installation support, a cooler lower edge plate, a lamination assembly and a cooler upper edge plate are sequentially arranged on the installation support in a stacked mode, and the cooler upper edge plate is provided with a cooling liquid inlet and outlet and a refrigerant inlet and outlet. The cost is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchangers, and in particular, relates to a fin-type plate heat exchanger. Background Art

[0002] At present, most new energy vehicles use power batteries as their power source, and the optimal operating temperature of the battery is around 20°C. In order to ensure the battery's service life and working efficiency, it is necessary to cool or heat the power battery according to its actual problems.

[0003] The battery of a new energy vehicle will generate heat during operation, which will increase the temperature of the battery itself. The longer the battery works, the more heat it accumulates and the higher the temperature. The existing technology generally uses a corrugated plate heat exchanger to cool the battery, but this solution is limited by the structure itself. When applied to 800V fast-charging new energy vehicles, it generally requires a three-process structure with a complex manufacturing process, high refrigeration flow resistance, and low heat exchange efficiency. If the battery cannot be cooled in time, it will affect the battery's working performance and service life, and even threaten the safety of the vehicle.

[0004] The utility model patent with publication number CN215930651U disclosed on March 1, 2022, a plate heat exchanger structure with anti-fin offset, which includes two symmetrically arranged support vertical plates and a bottom plate for support, as well as a connecting column, a front pressure plate, a pull bolt, a rear pressure plate, heat exchange fins and a loading and unloading mechanism. The top and bottom of the two support vertical plates are fixed by connecting columns, and a front pressure plate is fixed to one side of the support vertical plate at one end of the connecting column. A rear pressure plate is installed on one side of the front pressure plate through a pull bolt, and a number of heat exchange fins are installed in the middle of the pull bolt. Both sides of the rear pressure plate are connected to the support vertical plates through a loading and unloading mechanism. The loading and unloading mechanism includes a screw, a driving wheel and a transmission belt, and the screw is installed between the front pressure plate and the support vertical plate. This plate heat exchanger structure with anti-fin offset also cannot solve the technical problems recorded above. Summary of the invention

[0005] The object of the present invention is to provide a finned plate heat exchanger with high heat exchange efficiency, simple manufacturing process and low cost in view of the deficiencies in the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The finned plate heat exchanger comprises a mounting bracket, on which a cooler lower plate, a laminate assembly and a cooler upper plate are sequentially stacked, and the cooler upper plate is provided with a coolant inlet and outlet and a refrigerant inlet and outlet.

[0008] The lamination assembly comprises a coolant side lamination and a refrigerant side lamination, and the coolant side laminations and the refrigerant side laminations are alternately stacked; the coolant side laminations and the refrigerant side laminations are both provided with coolant channels and refrigerant channels, the coolant channels on the coolant side laminations are convex structures, and the coolant channels on the refrigerant side laminations are concave structures; the refrigerant channels on the coolant side laminations are concave structures, and the refrigerant channels on the refrigerant side laminations are convex structures.

[0009] The coolant side stack is provided with a coolant side fin, and the refrigerant side stack is provided with a refrigerant side fin. The cross sections of the coolant side fin and the refrigerant side fin are both wavy structures.

[0010] The cooling liquid side laminations and the refrigerant side laminations are both symmetrical structures.

[0011] The cooler upper plate, the cooler lower plate, the coolant side laminations and the refrigerant side laminations are all provided with flanges.

[0012] The upper plate of the cooler is provided with a pipe opening and a through hole, and two of the pipe opening and the through hole are provided. The two pipe openings are respectively connected to the refrigerant inlet flange and the refrigerant outlet flange, and the two through holes are respectively connected to the coolant inlet pipe and the coolant outlet pipe.

[0013] An opening is arranged at the end of the mounting bracket, a buffer block is arranged in the opening, a mounting groove is arranged at the side of the buffer block, and the mounting groove is clamped with the opening.

[0014] The refrigerant inlet flange and the coolant outlet pipe are located at one end of the upper plate of the cooler, and the refrigerant outlet flange and the coolant inlet pipe are located at the other end of the upper plate of the cooler.

[0015] The refrigerant inlet flange and the refrigerant outlet flange include inner walls, and the inner walls are of a stepped structure.

[0016] The coolant inlet pipe and the coolant outlet pipe are provided with limiting ribs, and the limiting ribs abut against the upper end of the pipe opening.

[0017] The technical effect of the present invention is: the finned plate heat exchanger of the present invention is used to realize heat exchange between coolant and refrigerant through stacked plates and fins, and the coolant flow channels and the refrigerant flow channels are arranged in an alternating manner. Compared with the traditional plate heat exchanger, it has a larger heat exchange capacity and does not increase the flow resistance on the water side and the refrigerant side. It has high heat exchange efficiency, simple processing technology, light overall weight, compact structure, and can be applied to thermal management integrated modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification includes the following drawings, which show the following contents:

[0019] Figure 1is a cross-sectional view of a finned plate heat exchanger of the present invention;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the finned plate heat exchanger of the present invention;

[0021] Figure 3 is an exploded view of the finned plate heat exchanger of the present invention;

[0022] Figure 4 is a schematic structural diagram of the mounting bracket of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the lower plate of the cooler of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the upper side plate of the cooler of the present invention;

[0025] Figure 7 is a schematic structural diagram of the coolant side lamination of the present invention;

[0026] Figure 8 It is a schematic structural diagram of the cooling liquid side fin of the present invention;

[0027] Fig. 9 It is a schematic diagram of the structure of the refrigerant side stack of the present invention;

[0028] Fig.10 It is a structural schematic diagram of the refrigerant side fin of the present invention;

[0029] Fig.11 It is a schematic diagram of the structure of the shock absorbing block of the present invention;

[0030] Fig.12 It is a structural schematic diagram of the refrigerant inlet and outlet flanges of the present invention;

[0031] Fig.13 It is a schematic diagram of the structure of the coolant inlet and outlet water of the present invention.

[0032] The markings in the figure are: 1. Mounting bracket; 2. Lower plate of cooler; 3. Coolant side stacking plate; 4. Refrigerant side stacking plate; 5. Upper plate of cooler; 6. Coolant channel; 7. Refrigerant channel; 8. Coolant side fin; 9. Refrigerant side fin; 10. Shock absorber; 11. Coolant flow channel; 12. Refrigerant flow channel; 13. Pipe orifice; 14. Through hole; 15. Refrigerant inlet flange; 16. Refrigerant outlet flange; 17. Coolant inlet pipe; 18. Coolant outlet pipe; 19. Limiting rib; 20. Inner wall; 21. Opening; 22. Mounting groove; 23. Protrusion; 24. Flanging; 25. Mounting hole; 26. Avoidance gap. DETAILED DESCRIPTION

[0033] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0034] like Figures 1 to 3 As shown, the finned plate heat exchanger includes a mounting bracket 1, on which a cooler lower plate 2, a laminate assembly and a cooler upper plate 5 are stacked in sequence, and the cooler upper plate 5 is provided with a coolant inlet and outlet and a refrigerant inlet and outlet. The mounting bracket 1 is located at the bottom of the heat exchanger and is used to connect the heat exchanger to the vehicle body. The coolant inlet and outlet and the refrigerant inlet and outlet are both located at the top of the heat exchanger, which reduces the difficulty of connecting the pipelines and improves the efficiency; the laminate assembly composed of the laminate and the fins on the upper and lower sides thereof serves as a heat exchange element, and the coolant flow channel 11 and the refrigerant flow channel 12 in the heat exchanger are formed by the laminate structure composed of the cooler lower plate 2, the laminate assembly and the cooler upper plate 5, and are arranged in a staggered manner, with high heat exchange efficiency.

[0035] like Figures 1 to 10As shown, the lamination assembly includes a coolant side lamination 3 and a refrigerant side lamination 4, which are alternately stacked; the coolant side lamination 3 and the refrigerant side lamination 4 are both provided with a coolant channel 6 and a refrigerant channel 7, the coolant channel 6 on the coolant side lamination 3 is a convex structure, and the coolant channel 6 on the refrigerant side lamination 4 is a groove structure; the refrigerant channel 7 on the coolant side lamination 3 is a groove structure, and the refrigerant channel 7 on the refrigerant side lamination 4 is a convex structure. The lamination is provided with four channel holes, two refrigerant flow channel holes and two water side flow channel holes, and adopts convection heat exchange. The upper plate 5 of the cooler and the first layer of laminations form the first coolant flow channel. The coolant channels 6 on the coolant side stack 3 and the refrigerant side stack 4 are in planar contact at the protrusion structures and groove structures of the two, and the same is true for the refrigerant channels 7, so that the internal spaces of adjacent stacks are spatially closed, that is, coolant layers and refrigerant layers separated from each other are formed; wherein, a protrusion 23 is provided on the lower plate 2 of the cooler for closing the bottom of the coolant flow channel 11. Each coolant layer in the heat exchanger is composed of the space between the laminations, the protrusion 23 at the coolant channel 6 and the groove structure. The refrigerant layer is similar. Since the groove structure and the protrusion structure at the coolant channel 6 and the refrigerant channel 7 on the coolant side lamination 3 and the refrigerant side lamination 4 are in opposite positions, and the two laminations are alternately stacked, the coolant layer and the refrigerant layer are blocked by the laminations and do not contact each other, thus forming a coolant layer and a refrigerant layer arranged alternately between adjacent layers. The coolant layer is connected in turn through the coolant channel 6 to form the coolant flow channel 11, and the refrigerant flow channel 12 is connected in turn through the refrigerant channel 7 to form the refrigerant flow channel 12. Therefore, the coolant flow channel 11 and the refrigerant flow channel 12 make full use of the internal space of the heat exchanger, achieving a compact structure, making the heat exchanger more convenient in the vehicle layout, and enabling the refrigerant and the coolant to fully exchange heat.

[0036] like Figure 3 As shown, the coolant side stack 3 is provided with a coolant side fin 8, and the refrigerant side stack 4 is provided with a refrigerant side fin 9. The cross-sections of the coolant side fin 8 and the refrigerant side fin 9 are both wavy structures. This type of fin is set in both the coolant layer and the refrigerant layer. The fin adopts a louver structure, and the cross-section is in a continuously undulating wave shape, which can increase the heat dissipation area, thereby improving the heat exchange efficiency, while improving the fluid disturbance and strengthening the heat exchange characteristics, and has the advantages of high heat exchange efficiency and low flow resistance. The stack thickness is 0.4mm, the refrigerant side fin 9 material thickness is 0.1mm, the height is 1.5mm, and the fin wave pitch is denser; the coolant side fin 8 material thickness is 0.07mm, the height is 1.8mm, the stack and the fin are connected together by brazing, and the two fins are designed with different heights, which can increase the heat exchange performance while ensuring that the flow resistance on both sides meets the heat dissipation requirements.

[0037] like Figures 1 to 10As shown, the coolant side lamination 3 and the refrigerant side lamination 4 are both symmetrical structures. Since the coolant flow channel 11 and the refrigerant flow channel 12 are formed by lamination, the lamination only needs to be subjected to force in a single vertical direction to be formed, which simplifies the punching and stamping manufacturing process, greatly reduces the difficulty of processing and forming, and reduces production costs. In addition, both laminations are symmetrical structures, and the protrusions 23 and grooves thereon have the same shape, which saves the cost of redeveloping the mold.

[0038] like Figures 5 to 10 As shown, the cooler upper plate 5, the cooler lower plate 2, the coolant side laminate 3 and the refrigerant side laminate 4 are all provided with flanges 24. The above structure adopts flanges 24 to form the stacking arrangement of the above components, and the clamping of the flanges 24 has high stability, and then welding is used to weld at the flanges 24 to form an integral body, thereby closing the coolant flow channel 11 and the refrigerant flow channel 12, improving the sealing of the flow channel, and the welding of the flanges 24 will not affect the inside of the flow channel.

[0039] like Figure 6 As shown, the upper plate 5 of the cooler is provided with a pipe opening 13 and a through hole 14, and two pipe openings 13 and two through holes 14 are provided. The two pipe openings 13 are respectively connected to the refrigerant inlet flange 15 and the refrigerant outlet flange 16, and the two through holes 14 are respectively connected to the coolant inlet pipe 17 and the coolant outlet pipe 18. The refrigerant inlet and outlet flanges are used as connectors of the refrigerant circuit. The two have the same structure and uniform specifications, which can reduce development costs. The coolant inlet and outlet pipes are used as connectors of the coolant circuit. The two have the same structure and uniform specifications, which can reduce development costs. There is no need to consider wrong or reverse installation during assembly, which improves assembly efficiency. The setting of the pipe opening 13 forms a pipeline protrusion structure, which facilitates the connection of the refrigerant inlet and outlet flanges.

[0040] like Figure 5 As shown, an opening 21 is provided at the end of the mounting bracket 1, a buffer block is provided in the opening 21, a mounting groove 22 is provided on the side of the buffer block, and the mounting groove 22 is engaged with the opening 21. The buffer block is easy to install and maintain and replace, and is constrained in both the axial and radial directions. Multiple buffer blocks improve the buffering effect of impact vibration, so that the overall heat exchanger and the vehicle body form a soft connection, improve the anti-vibration ability of the heat exchanger, and reduce the influence of road excitation on the stability of the heat exchanger. The mounting bracket 1 is also provided with multiple mounting holes 25, and the mounting holes 25 include waist holes and round holes, which are convenient for adjustment during fixing. A relief notch 26 is also provided on one side of the mounting bracket 1 to facilitate the arrangement of pipelines.

[0041] like Figure 2 and Figure 3As shown, the refrigerant inlet flange 15 and the coolant outlet pipe 18 are located at one end of the upper plate 5 of the cooler, and the refrigerant outlet flange 16 and the coolant inlet pipe 17 are located at the other end of the upper plate 5 of the cooler. The positions of the refrigerant inlet and outlet and the coolant inlet and outlet are staggered on the heat exchanger, so that the flow directions of the refrigerant fluid and the coolant fluid are opposite, so that the refrigerant fluid and the coolant fluid always maintain a large temperature difference in the heat exchanger, achieving sufficient heat exchange, thereby significantly improving the heat exchange efficiency.

[0042] like Figure 1 and Fig.12 As shown, the refrigerant inlet flange 15 and the refrigerant outlet flange 16 include an inner wall 20, and the inner wall 20 is a stepped structure. The above structure forms a clamping connection between the outer wall of the refrigerant pipeline and the inner wall 20, and the end of the pipeline forms an abutment effect with the inner wall 20, ensuring that the refrigerant pipeline can be installed in place and improving the connection stability.

[0043] like Figure 1 and Fig.13 As shown, the coolant inlet pipe 17 and the coolant outlet pipe 18 are provided with limiting ribs 19, and the limiting ribs 19 abut against the upper end of the pipe opening 13. The ends of the coolant inlet and outlet pipes extend into the pipe opening 13 and are clamped therewith, and the limiting ribs 19 ensure that the coolant inlet and outlet pipes are installed in place, and the limiting ribs 19 also serve as reinforcing ribs to strengthen the coolant inlet and outlet pipe structure.

[0044] The heat exchange principle of the finned plate heat exchanger is as follows: the refrigerant enters from the refrigerant inlet flange 15, and the coolant enters from the coolant inlet pipe 17. Since the groove structure and the convex structure at the coolant channel 6 and the refrigerant channel 7 of each laminate are opposite, the refrigerant and the coolant will respectively pass into the two adjacent laminate areas. Through the staggered arrangement of the laminates, the refrigerant and the coolant flow alternately in layers between the laminates, thereby forming multi-layer connected coolant flow channels 11 and refrigerant flow channels 12. The laminates and fins are used for heat exchange, and the refrigerant after heat exchange is discharged from the refrigerant outlet flange 16, and the coolant after heat exchange is discharged from the coolant outlet pipe 18.

[0045] The finned plate heat exchanger realizes heat exchange between coolant and refrigerant through stacked plates and fins, and arranges the coolant flow channel 11 and the refrigerant flow channel 12 in an alternating manner. Compared with the traditional plate heat exchanger, it has a larger heat exchange capacity and does not increase the flow resistance on the water side and the refrigerant side. It has high heat exchange efficiency, simple processing technology, light overall weight, compact structure, and can be applied to thermal management integrated modules.

[0046] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A finned plate heat exchanger, characterized in that: The invention comprises a mounting bracket (1), on which a cooler lower plate (2), a laminate assembly and a cooler upper plate (5) are sequentially stacked, and the cooler upper plate (5) is provided with a coolant inlet and outlet and a refrigerant inlet and outlet.

2. The finned plate heat exchanger according to claim 1, characterized in that: The lamination assembly comprises a cooling liquid side lamination (3) and a refrigerant side lamination (4), wherein the cooling liquid side lamination (3) and the refrigerant side lamination (4) are alternately stacked; the cooling liquid side lamination (3) and the refrigerant side lamination (4) are both provided with cooling liquid channels (6) and refrigerant channels (7); the cooling liquid channels (6) on the cooling liquid side lamination (3) are of a convex structure, while the cooling liquid channels (6) on the refrigerant side lamination (4) are of a concave structure; the refrigerant channels (7) on the cooling liquid side lamination (3) are of a concave structure, while the refrigerant channels (7) on the refrigerant side lamination (4) are of a convex structure.

3. The finned plate heat exchanger according to claim 2, characterized in that: The coolant side stack (3) is provided with a coolant side fin (8), and the refrigerant side stack (4) is provided with a refrigerant side fin (9), and the cross-sections of the coolant side fin (8) and the refrigerant side fin (9) are both wavy structures.

4. The finned plate heat exchanger according to claim 3, characterized in that: The cooling liquid side laminations (3) and the refrigerant side laminations (4) are both symmetrical structures.

5. The finned plate heat exchanger according to claim 4, characterized in that: The cooler upper plate (5), the cooler lower plate (2), the coolant side laminate (3) and the refrigerant side laminate (4) are all provided with flanges (24).

6. The finned plate heat exchanger according to claim 5, characterized in that: The upper plate (5) of the cooler is provided with a pipe opening (13) and a through hole (14), and two of the pipe opening (13) and two of the through holes (14) are provided. The two pipe openings (13) are respectively connected to a refrigerant inlet flange (15) and a refrigerant outlet flange (16), and the two through holes (14) are respectively connected to a coolant inlet pipe (17) and a coolant outlet pipe (18).

7. The finned plate heat exchanger according to any one of claims 1 to 6, characterized in that: An opening (21) is provided at the end of the mounting bracket (1), a buffer block is provided in the opening (21), a mounting groove (22) is provided on the side of the buffer block, and the mounting groove (22) is snap-connected with the opening (21).

8. The finned plate heat exchanger according to claim 6, characterized in that: The refrigerant inlet flange (15) and the coolant outlet pipe (18) are located at one end of the upper plate (5) of the cooler, and the refrigerant outlet flange (16) and the coolant inlet pipe (17) are located at the other end of the upper plate (5) of the cooler.

9. The finned plate heat exchanger according to claim 8, characterized in that: The refrigerant inlet flange (15) and the refrigerant outlet flange (16) include an inner wall (20), and the inner wall (20) is a stepped structure.

10. The finned plate heat exchanger according to claim 9, characterized in that: The coolant inlet pipe (17) and the coolant outlet pipe (18) are provided with limiting ribs (19), and the limiting ribs (19) abut against the upper end of the pipe opening (13).

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