Plate Heat Exchanger

Abstract

The plate heat exchanger provided in the present application includes a heat exchange core, wherein the first plate group of the heat exchange core includes a plurality of first plates and a plurality of second plates, and each opening of the first plate is stacked with each opening of the second plate to form a plurality of channels; the plate heat exchanger also includes a first side plate and a second plate group, wherein the second plate group is fixed to the first plate group, and the second plate group is closer to the first side plate than the first plate group; the second plate group includes a third plate and a fourth plate, and the third plate is closer to the first side plate than the fourth plate; at least one channel exists in the plurality of channels, and the third plate and the fourth plate are both provided with a reinforcement structure matched with the channel; one side of the reinforcement structure of the third plate is in contact with at least a partial area of ​​the reinforcement structure of the fourth plate, and the other side is in contact with at least a partial area of ​​the first side plate. The plate heat exchanger of the present application has good pressure bearing performance.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a plate heat exchanger. Background Art

[0002] In the related art, the working pressure of the fluid flowing in the plate heat exchanger is relatively high, so in order to ensure the stability of the product, the strength requirements of the heat exchanger are also relatively high. Corresponding to the flow position with a large cavity such as the corner hole channel, in order to ensure that the side plate located outside the corner hole channel will not convexly deform when under pressure during operation, the inventor understands that a reinforcement plate is assembled and welded on the outside of the side plate of the plate heat exchanger, and the thickness of the reinforcement plate is required to be sufficient to withstand the working pressure of the heat exchange fluid so as not to convexly deform the side plate. However, this is not conducive to reducing the weight of the product while ensuring the strength of the product. Summary of the invention

[0003] The invention of the present application aims to provide a plate heat exchanger with good pressure bearing capacity and conducive to reducing product weight.

[0004] The present application provides a plate heat exchanger, comprising a heat exchange core, the heat exchange core comprising a plurality of stacked plates fixed together; the heat exchange core comprising a first plate group; the first plate group comprising a plurality of first plates and a plurality of second plates, the first plates and the second plates being arranged alternately; the first plates and the second plates each comprising a plurality of orifices; the orifices of the first plates are respectively arranged corresponding to the orifices of the second plates, and the heat exchange core has a plurality of channels;

[0005] The plate heat exchanger further includes a first side plate, which is arranged outside the heat exchange core along the plate stacking direction; the heat exchange core further includes a second plate group, which is fixed to the first plate group, and the second plate group is closer to the first side plate than the first plate group; the second plate group includes a third plate and a fourth plate, and the third plate is closer to the first side plate than the fourth plate;

[0006] The third plate and the fourth plate are both provided with a reinforcement structure; there is at least one channel among the plurality of channels, and in a plane perpendicular to the stacking direction of the plates, the projection of the reinforcement structure of the third plate on the plane coincides with the projection of the channel on the plane in at least a partial area, and the projection of the reinforcement structure of the fourth plate on the plane coincides with the projection of the channel on the plane in at least a partial area; one side of the reinforcement structure of the third plate contacts with at least a partial area of ​​the reinforcement structure of the fourth plate, and the other side contacts with at least a partial area of ​​the first side plate.

[0007] The plate heat exchanger provided by the present application has a projection of the reinforcement structure of the third plate and a projection of the channel at least partially overlapping in a plane perpendicular to the stacking direction of the plates, and a projection of the reinforcement structure of the fourth plate and a projection of the channel at least partially overlapping in a plane. Therefore, the third plate and the fourth plate are both provided with reinforcement structures at local positions corresponding to the channels, which is beneficial to reducing the overall product weight and facilitating the superposition effect of the thickness of the reinforcement structure of the third plate and the thickness of the reinforcement structure of the fourth plate with the thickness of the first side plate itself, thereby reducing the risk of the first side plate being deformed outward under pressure, and the plate heat exchanger can obtain better pressure-bearing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of a plate heat exchanger provided in an embodiment of the present application;

[0009] Figure 2 It is a structural schematic diagram of a heat exchange core provided in an embodiment of the present application;

[0010] Figure 3 This application Figure 1 An exploded schematic diagram of a partial structure of a plate heat exchanger;

[0011] Figure 4 It is a schematic structural diagram of a first plate and a second plate provided in an embodiment of the present application;

[0012] Figure 5 is a structural schematic diagram of a third plate provided in an embodiment of the present application;

[0013] Figure 6 is a schematic structural diagram of a fourth plate provided in an embodiment of the present application;

[0014] Figure 7 It is a schematic diagram of the cross-sectional structure of a plate heat exchanger provided in an embodiment of the present application;

[0015] Figure 8 This application Figure 7 A schematic diagram of a local position enlargement;

[0016] Fig. 9 This application Figure 5 The enlarged schematic diagram of the local position structure of the third plate shown;

[0017] Fig.10 This application Figure 6 An enlarged schematic diagram of the local position structure of the fourth plate shown;

[0018] Fig.11 is a schematic structural diagram of another third plate provided in an embodiment of the present application;

[0019] Fig.12 It is an application Fig.11 An enlarged schematic diagram of the specific position of the third plate of the plate heat exchanger is shown;

[0020] Fig.13 is a structural schematic diagram of another third plate provided in an embodiment of the present application;

[0021] Fig.14 It is an application Fig.13 An enlarged schematic diagram of the specific position of the third plate of the plate heat exchanger is shown;

[0022] Fig.15 It is a structural schematic diagram of another plate heat exchanger provided in an embodiment of the present application;

[0023] Fig.16 This application Fig.15 Schematic diagram of the enlarged local position of the cross-section structure of the medium plate heat exchanger. DETAILED DESCRIPTION

[0024] like Figures 1 to 6 As shown, the present application relates to a plate heat exchanger 10, including a heat exchange core 11, wherein the heat exchange core 11 includes a plurality of stacked plates 100 fixed together. A gap for fluid to pass through is formed between adjacent plates 100. Different types of heat exchange media usually flow on both sides of the plates 100.

[0025] The heat exchange core 11 in the embodiment of the present application includes a first plate group 12 . The first plate group 12 includes a plurality of first plates 101 and a plurality of second plates 102 . The first plates 101 and the second plates 102 are alternately arranged.

[0026] The first plate 101 and the second plate 102 each include a plurality of orifices, and each orifice of the first plate 101 is stacked with each orifice of the second plate 102 to form a plurality of channels 30. Regarding the number of orifices provided on the plate, in some application scenarios, the plate 100 is provided with 4 corner holes, and the plate heat exchanger can use two heat exchange media for heat exchange. In some other application scenarios, the plate 100 can also be provided with 6 corner holes, and the plate heat exchanger can use three heat exchange media for heat exchange. The specific heat exchange form depends on the actual application scenario, and this application does not make specific restrictions.

[0027] In the embodiment of the present application, the plurality of plates 100 of the heat exchange core 11 are stacked to form a first circulation channel and a second circulation channel that are not connected. The first circulation channel is used to circulate the refrigerant, and the second fluid channel is used to circulate the secondary coolant. Accordingly, the plurality of inter-plate channels formed by the stacking of the plurality of plates 100 are alternately arranged in a manner that the refrigerant flows in one layer and the secondary coolant flows in another adjacent layer.

[0028] The first plate 101 and the second plate 102 of the present application both include a first orifice 21, a second orifice 22, a third orifice 23 and a fourth orifice 24. The four orifices can be distributed at the four corners of the plate respectively. The first orifice 21, the second orifice 22, the third orifice 23 and the fourth orifice 24 of the first plate 101 correspond to the first orifice 21, the second orifice 22, the third orifice 23 and the fourth orifice 24 of the second plate 102 respectively. Specifically, the first orifices 21 of each plate of the first plate group 12 are aligned to form a first channel 31, the second orifices 22 of each plate are aligned to form a second channel 32, the third orifices 23 of each plate are aligned to form a third channel 33, and the fourth orifices 24 of each plate are aligned to form a fourth channel 34. Among them, the first channel 31 and the second channel 32 are part of the first circulation channel, and the third channel 33 and the fourth channel 34 are part of the second circulation channel.

[0029] The plate heat exchanger 10 further includes a first side plate 14, which is arranged outside the heat exchange core 11 along the stacking direction of the plate 100. The heat exchange core 11 further includes a second plate group 13, which is fixed to the first plate group 12, and the second plate group 13 is closer to the first side plate 14 than the first plate group 12. The second plate group 13 can be fixed between the first plate group 12 and the first side plate 14, so that the outermost plate of the second plate group 13 close to the first plate group 12 is fixedly arranged between the first plate group 12, and the outermost plate of the second plate group 13 close to the first side plate 14 is fixed to the first side plate. Of course, in other embodiments, a fin plate or other plate may be further provided between the second plate group 13 and the first side plate 14, so that the second plate group 13 and the first side plate 14 may not be in direct contact with each other. For the channel formed by the first plate group 12, the fluid flowing in the channel does not directly contact the first side plate 14. In the extension direction of the channel, the fluid and the first side plate 14 are separated by the second plate group. The corresponding second plate group can play a certain role in strengthening the strength of the first side plate 14, as described below.

[0030] In the embodiment of the present application, the second plate group 13 includes a third plate 103 and a fourth plate 104, and the third plate 103 is closer to the first side plate 14 than the fourth plate 104. The third plate 103 can be directly fixedly connected between the fourth plate 104 and the first side plate 14.

[0031] There is at least one channel 30 among the plurality of channels 30 of the first plate group 12, and the extension direction of the channel 30 coincides with the stacking direction of the plates 100, that is, the thickness direction of the plate heat exchanger 10. In the extension direction of the channel 30, the first side plate 14 interferes with the extension direction of the channel 30. In a plane perpendicular to the stacking direction of the plates, the projection of the channel 30 on the plane is within the projection range of the first side plate 14 on the plane, the projection of the reinforcement structure 40 of the third plate 103 on the plane coincides with the projection of the channel 30 on the plane at least in part, and the projection of the reinforcement structure 40' of the fourth plate 104 on the plane coincides with the projection of the channel 30 on the plane at least in part. One side of the reinforcement structure 40 of the third plate 103 contacts at least part of the reinforcement structure 40' of the fourth plate 104, and the other side contacts at least part of the first side plate 14.

[0032] The reinforcement structure 40 of the third plate 103 can be integrally formed with other parts of the third plate 103, and the reinforcement structure 40' of the fourth plate 104 can also be integrally formed with other parts of the fourth plate 104. In actual application scenarios, the thickness of the side plate of the aluminum brazed plate heat exchanger is usually 1.2mm-1.5mm, and the thickness of the plate is generally 0.4-0.5mm. After the reinforcement structure 40 of the third plate 103, the reinforcement structure 40' of the fourth plate 104 and the first side plate 14 are superimposed, the thickness of the local position of the corresponding channel 30 can be effectively increased. The channel position formed by the orifice of the plate is a key part that affects the strength of the plate heat exchanger product. There is no need to add an additional reinforcement plate or reinforcement block to the first side plate 14 of the plate heat exchanger 10 to increase the strength of the side plate. The overall strength of the plate heat exchanger can be effectively improved by cooperating the reinforcement structure of the third plate 103 and the fourth plate 104 of the heat exchange core 11 with the first side plate 14.

[0033] For the fluid flowing in the plate heat exchanger 10, the pressure of the refrigerant is usually much greater than that of the coolant. Therefore, in each channel position, it is preferred to set the reinforcement structure 40 of the third plate 103 and the reinforcement structure 40' of the fourth plate 104 in the extension direction corresponding to the channel where the refrigerant flows. This can effectively improve the pressure-bearing performance of the plate heat exchanger in view of the high pressure characteristics of the refrigerant. The third plate 103 and the fourth plate 104 can still be provided with corner holes corresponding to the channels where the coolant flows. Figure 3 An exploded schematic diagram of a partial structure of a plate heat exchanger is shown, in which the third plate 103 is provided with a third orifice 23 and a fourth orifice 24, and the fourth plate is also provided with a third orifice 23 and a fourth orifice 24. The third orifices 23 of the first, second, third and fourth plates correspond to each other and are coaxially arranged, and the fourth orifices 24 of the first, second, third and fourth plates correspond to each other and are coaxially arranged, and the first side plate 14 can withstand the pressure of the low-pressure refrigerant.

[0034] In some embodiments of the present application, the first side plate 14 and the extension direction of each channel 30 interfere with each other, so that in a plane perpendicular to the stacking direction of the plates, the projection of each channel 30 on the plane is within the projection range of the first side plate 14 on the plane. Figure 3 , Figure 7 As shown, the first side plate 14 can be the bottom side plate of the plate heat exchanger 10, and the reinforcement structure 40 of the third plate 103 includes a first reinforcement structure 401 and a second reinforcement structure 402. The first reinforcement structure 401 interferes with the extension direction of the first channel 31, and the second reinforcement structure 402 interferes with the extension direction of the second channel 32. The reinforcement structure 40 of the fourth plate 104 includes a third reinforcement structure 403 and a fourth reinforcement structure 404. The third reinforcement structure 403 interferes with the extension direction of the first channel 31, and the fourth reinforcement structure 404 interferes with the extension direction of the second channel 32. In a plane perpendicular to the stacking direction of the plates, the projection of the first reinforcement structure 401 on the plane and the projection of the third reinforcement structure on the plane both coincide with the projection of the first channel 31 on the plane. The projection of the second reinforcement structure 402 on the plane and the projection of the fourth reinforcement structure 404 on the plane both coincide with the projection of the second channel 32 on the plane.

[0035] One side of the first reinforcing structure 401 is attached and fixed to at least a portion of the third reinforcing structure 403, and the other side is attached and fixed to at least a portion of the first side plate 14. One side of the second reinforcing structure 402 is attached and fixed to at least a portion of the fourth reinforcing structure 404, and the other side is attached and fixed to at least a portion of the first side plate 14.

[0036] The reinforcing structure 40 of the third plate 103 can be integrally formed with other parts of the third plate 103, and the reinforcing structure 40 of the fourth plate 104 can be integrally formed with other parts of the fourth plate 104. This is conducive to simplifying the difficulty of assembly and manufacturing of plate heat exchanger products. For example, the method for manufacturing the first plate, the second plate, the third plate and the fourth plate can be as follows: multiple first mold plates and multiple second mold plates can be provided, and the four positions to be punched of the first mold plate are punched to obtain a first plate 101 including four orifices, and the four positions to be punched of the second mold plate are punched to obtain a second plate 102 including four orifices. The positions to be punched corresponding to the first hole 31 and the second hole 32 of the first mold plate are not punched to obtain a third plate 103, and the positions to be punched not punched form a reinforcement structure 40 of the third plate 103. The positions to be punched corresponding to the first hole 31 and the second hole 32 of the second mold plate are not punched to obtain a fourth plate 104, and the positions to be punched not punched form a reinforcement structure 40' of the fourth plate 104.

[0037] That is to say, the first plate 101 and the third plate 103 can be made by using the same first mold plate. The first mold plate is punched at the positions corresponding to the four channels to form the first plate 101, and the first mold plate is not punched at the positions corresponding to the first channel 31 and the positions corresponding to the second channel 32 to form the third plate 103. Fig. 9 The schematic diagram of the partial position of the third plate 103 shown in the figure shows one of the positions a1 to be punched on the third plate 103. When punching is performed along the dotted line position indicated by a1, the first plate 101 with the corresponding position opening can be obtained. Similarly, the second plate 102 and the fourth plate 104 can also be made using the same second mold plate. The second mold plate is punched at the positions corresponding to the four channels to form the second plate 102. The second mold plate is not punched at the positions corresponding to the first channel 31 and the positions corresponding to the second channel 32 to form the fourth plate 104. For reference, Fig.10 The schematic diagram of the partial position of the fourth plate 104 shown in the figure shows a position a2 to be punched in the fourth plate 104. When punching is performed along the dotted line position indicated by a2, a second plate 102 with a corresponding hole can be obtained. This helps to reduce the difficulty of plate processing and manufacturing and save mold development costs.

[0038] Of course, the reinforcing structure 40 of the third plate 103 and other parts of the third plate 103 may also be formed into an integral structure through secondary processing, and the reinforcing structure 40 of the fourth plate 104 and other parts of the fourth plate 104 may also be formed into an integral structure through secondary processing.

[0039] In some embodiments of the present application, Figure 2 As shown, the first channel 31 and the second channel 32 are respectively located on both sides of the length direction of the plate heat exchanger 10, wherein the first channel 31 and the second channel 32 are located on the same side of the width direction of the plate heat exchanger 10, and accordingly, the fluid flows on the plate in a unilateral flow form. Of course, in other embodiments, the first channel 31 and the second channel 32 can also be arranged diagonally, and accordingly, the fluid flows on the plate in a diagonal flow form. Accordingly, the third plate 103 is provided with a reinforcing structure 40 that interferes with the extension direction of the corresponding channel in the extension direction of the corresponding first channel 31 and the extension direction of the second channel 32, and the fourth plate 104 is provided with a reinforcing structure 40' that interferes with the extension direction of the corresponding channel in the extension direction of the corresponding first channel 31 and the extension direction of the second channel 32, so that the local position of the corresponding channel of the first side plate 14 can be strengthened from both sides of the length direction of the plate heat exchanger 10, which is more conducive to the stability and pressure bearing performance of the product.

[0040] refer to Figure 7 , Figure 8 As shown, the area where the reinforcement structure 40 of the third plate 103 contacts the reinforcement structure 40 of the fourth plate 104 is recorded as the first contact area S1, and the area where the reinforcement structure 40 of the third plate 103 contacts the first side plate 14 is recorded as the second contact area S2. In some embodiments, in a plane perpendicular to the axial direction of the channel 30, the projection of the first contact area S1 on the plane can be located within the range of the projection of the second contact area S2 on the plane. Specifically, the projection of the first contact area S1 on the plane roughly overlaps with the projection of the second contact area S2 on the plane, which is conducive to maximizing the range of superposition of the reinforcement structure 40 of the third plate 103 and the reinforcement structure 40' of the fourth plate 104 with the first side plate 14, which is conducive to improving the pressure bearing capacity of the first side plate 14, thereby helping to improve the strength of the plate heat exchanger as a whole. Alternatively, the projection of the first contact area S1 on the plane may be slightly smaller than the projection of the second contact area S2 on the plane. Of course, the projection of the first contact area S1 on the plane and the projection of the second contact area S2 on the plane may also be arranged in an intersecting manner, and both may have partially overlapping areas with each other.

[0041] The plate heat exchanger 10 also includes a second side plate 15 , the heat exchange core 11 is fixedly connected between the first side plate 14 and the second side plate 15 , the first plate group 12 is fixedly connected between the second side plate 15 and the second plate group 13 , and the second plate group 13 is fixedly connected between the first plate group 12 and the first side plate 14 .

[0042] The second side plate 15 is provided with a plurality of plate holes 151 . Among the plurality of channels 30 , each channel 30 is connected to a corresponding plate hole 151 . Figure 3In the embodiment, the number of the plate holes 151 is 4, two of which are used as part of the refrigerant channel, and the other two are used as part of the secondary coolant channel.

[0043] Each plate 100 has a flat portion 200. In some embodiments, the main heat exchange area in the middle of each plate 100 may be provided with a heat exchange element protruding relative to the flat portion 200, and the heat exchange element may be a convex point type or a herringbone wave type, and the heat exchange element may realize enhanced heat exchange of the fluid.

[0044] refer to Figures 5 to 10 As shown, the third plate 103 has a first flat portion 2001, and the third plate 103 is provided with a first boss portion 201 protruding from its first flat portion 2001 in a direction away from the first side plate 14. The third plate 103 is also provided with a first groove portion 301, and the first groove portion 301 is recessed from the first boss portion 201, and the first groove portion 301 forms at least a part of the reinforcement structure 40 of the third plate 103.

[0045] The fourth plate 104 further has a second flat plate portion 2002 . The fourth plate 104 is provided with a second groove portion 302 that sinks from the second flat plate portion 2002 toward the first side plate 14 . The second groove portion 302 forms at least a part of the reinforcement structure of the fourth plate 104 .

[0046] After the third plate 103 and the fourth plate 104 are assembled, the first boss portion 201 is sealed and connected to the second flat plate portion 2002 of the fourth plate 104, the second groove portion 302 is stacked with the first groove portion 301, one side of the first groove portion 301 is attached and fixed to the second groove portion 302, and the other side of the first groove portion 301 is attached and fixed to the first side plate 14.

[0047] The first boss portion 201 includes a first top portion 2011 and a first side wall 2012 . The first top portion 2011 is a flat plate structure for easy welding. The first side wall 2012 is connected between the first top portion 2011 and the first flat plate portion 2001 . The first side wall 2012 is inclined relative to the first flat plate portion 2001 .

[0048] The first groove portion 301 includes a first bottom portion 3011 and a second side wall 3012. The first bottom portion 3011 is a flat plate structure for easy welding. The second side wall 3012 is connected between the first top portion 2011 and the first bottom portion 3011. The second side wall 3012 is inclined relative to the first flat plate portion 2001. The first bottom portion 3011 is flush with the first flat plate portion 2001 of the third plate 103.

[0049] The second groove portion 302 includes a second bottom 3021 and a third side wall 3022 . The second bottom 3021 is a flat plate structure for easy welding. The third side wall 3022 is connected between the second flat plate portion 2002 and the second bottom 3021 . The third side wall 3022 is inclined relative to the second flat plate portion 2002 .

[0050] The first side wall 2012, the second side wall 3012 and the third side wall 3022 are all inclined side wall structures, which is convenient for demoulding of the plate and reduces the manufacturing difficulty. The extension directions of the first side wall 2012 and the second side wall 3012 intersect, which makes it easier to demould the plate.

[0051] The second side wall 3012 and the third side wall 3013 can be fitted and fixed, and there can be a small gap between them. The first bottom 3011 of the first groove part 301 is fitted and fixed to the second bottom 3021 of the second groove part 302 on one side, and is fitted and fixed to the first side plate 14 on the other side.

[0052] In order to further improve the pressure bearing performance of the plate heat exchanger 10. Fig.11 As shown, the third plate 103 further includes a fifth reinforcing structure 405 and a sixth reinforcing structure 406. In a plane perpendicular to the stacking direction of the plates, the projection of the fifth reinforcing structure 405 on the plane coincides with the projection of the third channel 33 on the plane, and the projection of the sixth reinforcing structure 406 on the plane coincides with the projection of the fourth channel 34 on the plane. The fifth reinforcing structure 405 interferes with the extension direction of the third channel 33, and the sixth reinforcing structure 406 interferes with the extension direction of the fourth channel 34. The fifth reinforcing structure 405 of the third plate 103 is attached and fixed to at least a portion of the first side plate 14, and the sixth reinforcing structure 406 of the third plate 104 is attached and fixed to at least a portion of the first side plate 14. The fifth reinforcing structure 405 and the sixth reinforcing structure 406 of the third plate 103 are both part of the first flat plate portion 2001 of the third plate 103.

[0053] The structure of the fourth plate 104 may remain unchanged, that is, refer to Figure 6 As shown, the fourth plate 104 is provided with a third orifice 23 and a fourth orifice 24. This is conducive to the reasonable use of the inter-plate channels formed between the plates. Specifically, a first inter-plate channel is formed between the third plate 103 and the fourth plate 104. Fig.12In the enlarged view of a local position of the plate heat exchanger shown in the figure, in the extension direction of the third channel 33, the fifth reinforcement structure 405 of the third plate interferes with the extension direction of the third channel 33, the third orifice 23 of the fourth plate 104 forms a part of the third channel 33, the plate surface of the fourth plate 104 surrounding the third orifice 23 is spaced apart from the third plate 103, and the plate surface of the fourth plate 104 surrounding the fourth orifice 24 is spaced apart from the third plate 103, so that the third orifice 23 and the fourth orifice 24 of the fourth plate 104 are both connected to the first inter-plate channel, and the first inter-plate channel is a part of the second circulation channel. Since the third channel 33 is mainly used for circulating the coolant, although the working pressure of the coolant is usually lower than that of the refrigerant, the coolant still has a certain working pressure. In order to ensure that the working pressure of the fluid flowing in the third channel and the fourth channel will not cause the first side plate 14 to convexly deform, the thickness of the fifth reinforcement structure 405 and the thickness of the sixth reinforcement structure 406 can be superimposed on the thickness of the first side plate 14. In this way, the fifth reinforcement structure 405 and the sixth reinforcement structure 406 of the third plate 103 close to the first side plate 14 can be used to reinforce the local position of the first side plate 14, which is beneficial to improve the pressure-bearing performance of the plate heat exchanger.

[0054] In other embodiments of the present application, reference Fig.13 , Fig.14 As shown, the third plate 103 may also not be provided with the first groove portion 301, that is, the third plate 103 is provided with a first boss portion 201 protruding from its first flat plate portion 200 in a direction away from the first side plate 14, and the first boss portion 201 forms a recessed area 1031 on a side of the third plate 103 close to the first side plate 14, and at least a part of the first boss portion 201 forms a reinforcing structure 40 of the third plate 103.

[0055] The portion of the first flat plate portion 200 of the fourth plate 104 that interferes with the axial direction of the hole 30 forms a reinforcement structure 40 of the fourth plate 104 .

[0056] The first side plate 14 includes a main body portion 141 and a second boss portion 203, the second boss portion 203 protrudes relative to the main body portion 141 toward the side where the third plate 103 is located, the first boss portion 201 and the second boss portion 203 are stacked, and the second boss portion 203 is at least partially located in the recessed area 1031, and one side of the top 2011 of the first boss portion 201 is adhered and fixed to the top 2031 of the second boss portion 203, and the other side is adhered and fixed to the first flat plate portion 200 of the fourth plate 104.

[0057] The second boss portion 203 is integrally formed with the main body portion 141, or the second boss portion 203 is welded with the main body portion 141 to form an integral structure. Taking welding as an example, the specific welding method can be brazing. The main body portion 141 of the first side plate 14 closes the opening of the recessed area 1031, and the second boss portion 203 is accommodated in the recessed area 1031. The second boss portion 203 is connected between the main body portion 141 and the first boss portion 201 by welding.

[0058] The material of each plate 100 and the first side plate 14 of the heat exchange core 11 is 3 series aluminum alloy, and the material of the second boss portion 203 is any one of 3 series aluminum alloy, 6 series aluminum alloy, 7 series aluminum alloy, stainless steel and carbon steel. For the plate heat exchanger 10 product, it can also include external pipes or other adapters corresponding to the inlet and outlet of the two fluids, namely the refrigerant and the coolant. For example, refer to Figure 1 The plate heat exchanger 10 may further include a mounting plate 1 , which is located on the outer side of the second side plate 15 . The mounting plate 1 may be used to connect with the adapter 3 or the external pipe 2 . Figure 1 In the process, for two fluids, both fluids enter the flow channel in the heat exchange core from the same side in the thickness direction of the plate heat exchanger for heat exchange.

[0059] Of course, in other embodiments of the present application, such as Fig.15 The two external pipes 2 of the plate heat exchanger 10 may be located on one side of the plate heat exchanger 10 in the thickness direction, for example Fig.15 On the upper side of the product, the other two adapters 3 of the plate heat exchanger 10 can be located on the other side of the plate heat exchanger 10 in the thickness direction, for example Fig.15 The lower side of the product.

[0060] In some embodiments, the first side plate 14 may also be a side plate located on the upper side of the plate heat exchanger 10, that is, the first side plate 14 may be located between the heat exchange core 11 and the mounting plate 1, Fig.16 A schematic diagram of the partial cross-sectional structure of the middle plate heat exchanger. The third plate 103 is located between the first side plate 14 and the fourth plate 104, and the fourth plate 104 is located between the third plate 103 and the first plate group 12. At the first channel 31, the fluid is separated from the first side plate 14 by the second plate group, and the corresponding second plate group can strengthen the strength of the first side plate 14 to a certain extent.

[0061] Specifically, in a plane perpendicular to the stacking direction of the plates, the projection of the first channel 31 on the plane is within the projection range of the first side plate 14 on the plane, the projection of the reinforcement structure 40 of the third plate 103 on the plane overlaps with the projection of the first channel 31 on the plane at least in part, and the projection of the reinforcement structure 40' of the fourth plate 104 on the plane overlaps with the projection of the first channel 31 on the plane at least in part. One side of the reinforcement structure 40 of the third plate 103 contacts at least part of the reinforcement structure 40' of the fourth plate 104, and the other side contacts at least part of the first side plate 14. The reinforcement effect corresponding to this embodiment is similar to the principle of the aforementioned embodiment, and this application will not elaborate on it.

[0062] The above implementation modes are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. The understanding of this specification should be based on technical personnel in the relevant technical field. For example, directional descriptions such as "up" and "down" are used. Although this specification has described the present application in detail with reference to the above implementation modes, ordinary technical personnel in the field should understand that technical personnel in the relevant technical field can still modify or make equivalent substitutions to the present application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. A plate heat exchanger (10), comprising a heat exchange core (11), the heat exchange core (11) comprising a plurality of stacked plates (100) fixed together; the heat exchange core (11) comprising a first plate group (12); the first plate group (12) comprising a plurality of first plates (101) and a plurality of second plates (102), the first plates (101) and the second plates (102) being arranged alternately; the first plates (101) and the second plates (102) each comprising a plurality of orifices; the orifices of the first plates (101) are arranged correspondingly to the orifices of the second plates (102), and the heat exchange core has a plurality of channels (30); The plate heat exchanger (10) further comprises a first side plate (14), the first side plate (14) being arranged on the outside of the heat exchange core (11) along the plate stacking direction; the heat exchange core (11) further comprises a second plate group (13), the second plate group (13) being fixed to the first plate group (12), and the second plate group (13) being closer to the first side plate (14) than the first plate group (12); the second plate group (13) comprises a third plate (103) and a fourth plate (104), the third plate (103) being closer to the first side plate (14) than the fourth plate (104); The third plate (103) and the fourth plate (104) are both provided with a reinforcement structure; at least one hole (30) exists among the plurality of holes (30); in a plane perpendicular to the stacking direction of the plates, a projection of the reinforcement structure (40) of the third plate (103) on the plane overlaps with a projection of the hole (30) on the plane in at least a partial area; a projection of the reinforcement structure (40') of the fourth plate (104) on the plane overlaps with a projection of the hole (30) on the plane in at least a partial area; one side of the reinforcement structure (40) of the third plate (103) contacts with at least a partial area of ​​the reinforcement structure (40') of the fourth plate (104), and the other side contacts with at least a partial area of ​​the first side plate (14).

2. The plate heat exchanger (10) according to claim 1, characterized in that: In a plane perpendicular to the stacking direction of the plates, the projections of the channels (30) on the plane are all located within the projection range of the first side plate (14) on the plane; the reinforcing structure (40) of the third plate (103) and other parts of the third plate (103) are integrally formed; and the reinforcing structure (40') of the fourth plate and other parts of the fourth plate (104) are integrally formed; The area where the reinforcing structure (40) of the third plate (103) contacts the reinforcing structure (40') of the fourth plate (104) is recorded as a first contact area (S1); the area where the reinforcing structure (40) of the third plate (103) contacts the first side plate (14) is recorded as a second contact area (S2); in a plane perpendicular to the stacking direction of the plates, the projection of the first contact area (S1) on the plane is within the range of the projection of the second contact area (S2) on the plane; The plate heat exchanger (10) further comprises a second side plate (15); the heat exchange core (11) is fixedly connected between the first side plate (14) and the second side plate (15); the first plate group (12) is fixedly connected between the second side plate (15) and the second plate group (13); the second plate group (13) is fixedly connected between the first plate group (12) and the first side plate (14); the second side plate (15) is provided with a plurality of plate holes (151); and each of the plurality of channels (30) is respectively connected to a corresponding plate hole (151).

3. The plate heat exchanger (10) according to claim 2, characterized in that: The third plate (103) has a first flat plate portion (2001), and the third plate (103) is further provided with a first boss portion (201) protruding from the first flat plate portion (2001) in a direction away from the first side plate (14); the third plate (103) is further provided with a first groove portion (301), and the first groove portion (301) is recessed from the first boss portion (201); the first groove portion (301) forms at least a part of the reinforcement structure (40) of the third plate (103); The fourth plate (104) has a second flat plate portion (2002), and the fourth plate (104) is also provided with a second groove portion (302) that sinks from the second flat plate portion (2002) toward the first side plate (14), and the second groove portion (302) forms at least a part of the reinforcement structure (40') of the fourth plate (104); The first boss portion (201) is sealedly connected to the second flat plate portion (2002) of the fourth plate (104); the second groove portion (302) is stacked with the first groove portion (301); one side of the first groove portion (301) is affixed and fixed to the second groove portion (302), and the other side is affixed and fixed to the first side plate (14).

4. The plate heat exchanger (10) according to claim 3, characterized in that: The first boss portion (201) comprises a first top portion (2011) and a first side wall (2012); the first top portion (2011) is a flat plate structure that is convenient for welding; the first side wall (2012) is connected between the first top portion (2011) and the first flat plate portion (2001); and the first side wall (2012) is arranged to be inclined relative to the first flat plate portion (2001); The first groove portion (301) comprises a first bottom portion (3011) and a second side wall (3012); the first bottom portion (3011) is a flat plate structure that is convenient for welding; the second side wall (3012) is connected between the first top portion (2011) and the first bottom portion (3011); the second side wall (3012) is arranged obliquely relative to the first flat plate portion (2001); the first bottom portion (3011) is flush with the first flat plate portion (2001) of the third plate (103); The second groove portion (302) comprises a second bottom portion (3021) and a third side wall (3022); the second bottom portion (3021) is a flat plate structure that is convenient for welding; the third side wall (3022) is connected between the second flat plate portion (2002) and the second bottom portion (3021); the third side wall (3022) is arranged to be inclined relative to the second flat plate portion (2002).

5. The plate heat exchanger (10) according to claim 1 or 2, characterized in that: The plurality of plates (100) are stacked to form a first circulation channel and a second circulation channel that are not connected; the first circulation channel is used for circulating refrigerant, and the second circulation channel is used for circulating a secondary coolant; The first plate (101) and the second plate (102) both comprise a first orifice (21), a second orifice (22), a third orifice (23) and a fourth orifice (24); the first orifice (21), the second orifice (22), the third orifice (23) and the fourth orifice (24) of the first plate (101) are respectively arranged to correspond to the first orifice (21), the second orifice (22), the third orifice (23) and the fourth orifice (24) of the second plate (102); the heat exchange core (11) forms a first pore channel (31), a second pore channel (32), a third pore channel (33) and a fourth pore channel (34) accordingly; the first pore channel (31) and the second pore channel (32) are part of the first circulation channel, and the third pore channel (33) and the fourth pore channel (34) are part of the second circulation channel; The reinforcement structure (40) of the third plate (103) comprises a first reinforcement structure (401) and a second reinforcement structure (402), and the reinforcement structure (40') of the fourth plate (104) comprises a third reinforcement structure (403) and a fourth reinforcement structure (404); In a plane perpendicular to the stacking direction of the plates, the projection of the first reinforcing structure (401) on the plane and the projection of the third reinforcing structure (403) on the plane both coincide with the projection of the first hole (31) on the plane; the projection of the second reinforcing structure (402) on the plane and the projection of the fourth reinforcing structure (404) on the plane both coincide with the projection of the second hole (32) on the plane; One side of the first reinforcing structure (401) is adhered to and fixed to at least a portion of the third reinforcing structure (403), and the other side is adhered to and fixed to at least a portion of the first side plate (14); one side of the second reinforcing structure (402) is adhered to and fixed to at least a portion of the fourth reinforcing structure (404), and the other side is adhered to and fixed to at least a portion of the first side plate (14).

6. The plate heat exchanger (10) according to claim 5, characterized in that: The first hole (31) and the second hole (32) are respectively located on both sides of the length direction of the plate heat exchanger (10), wherein the first hole (31) and the second hole (32) are arranged diagonally, or the first hole (31) and the second hole (32) are located on the same side of the width direction of the plate heat exchanger.

7. The plate heat exchanger (10) according to claim 6, characterized in that: The fourth plate (104) is provided with a third orifice (23) and a fourth orifice (24); the third orifice (23) of the fourth plate (104), the third orifice (23) of the first plate (101), and the third orifice (23) of the second plate (102) are coaxially arranged; the fourth orifice (24) of the fourth plate (104), the fourth orifice (24) of the first plate (101), and the fourth orifice (24) of the second plate (102) are coaxially arranged; The third plate (103) further comprises a fifth reinforcing structure (405) and a sixth reinforcing structure (406); in a plane perpendicular to the stacking direction of the plates, a projection of the fifth reinforcing structure (405) on the plane coincides with a projection of the third hole (33) on the plane, and a projection of the sixth reinforcing structure (406) on the plane coincides with a projection of the fourth hole (34) on the plane; the fifth reinforcing structure (405) of the third plate (103) is fitted and fixed to at least a portion of the first side plate (14); and the sixth reinforcing structure (406) of the third plate (103) is fitted and fixed to at least a portion of the first side plate (14).

8. The plate heat exchanger (10) according to claim 7, characterized in that: The fifth reinforcement structure (405) and the sixth reinforcement structure (406) of the third plate (103) are both flat plate structures integrally formed with other parts of the third plate (103); A first inter-plate channel is formed between the third plate (103) and the fourth plate (104); the plate surface of the fourth plate (104) surrounding the third orifice (23) is spaced apart from the third plate (103); the plate surface of the fourth plate (104) surrounding the fourth orifice (24) is spaced apart from the third plate (103); the third orifice (23) and the fourth orifice (24) of the fourth plate (104) are both connected to the first inter-plate channel; the first inter-plate channel is a part of the second circulation channel.

9. The plate heat exchanger (10) according to claim 2, characterized in that: The third plate (103) has a first flat plate portion (2001), and the third plate (103) is further provided with a first boss portion (201) protruding from the first flat plate portion (2001) in a direction away from the first side plate (14), the first boss portion (201) forming a recessed area (1031) on a side of the third plate (103) close to the first side plate (14); at least a portion of the first boss portion (201) forms a reinforcement structure of the third plate (103); The first side plate (14) comprises a main body portion (141) and a second boss portion (203), wherein the second boss portion (203) protrudes relative to the main body portion (141) towards a side close to the third plate (103); the second boss portion (203) is at least partially located in the recessed area (1031), and the first boss portion (201) and the second boss portion (203) are at least partially attached and fixed.

10. The plate heat exchanger (10) according to claim 9, characterized in that: The second boss portion (203) and the main body portion (141) are integrally formed, or the second boss portion (203) and the main body portion (141) are welded into an integral structure.

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