Plate heat exchanger

Abstract

The invention relates to the technical field of heat exchangers, in particular to a plate heat exchanger which comprises a first substrate, a second substrate and at least one middle heat exchange layer. The middle heat exchange layer comprises a first flow channel plate, a first heat exchange plate, a second flow channel plate and a second heat exchange plate, the first flow channel plate is provided with a first medium flow channel, the first medium flow channel is communicated with the first medium inlet and the first medium outlet through two medium main channels, and the second flow channel plate is provided with a second medium flow channel; and the second medium flow channel is communicated with the second medium inlet and the second medium outlet through the other two medium main channels. By arranging the middle heat exchange layer, the plate does not need to be formed through stamping and stretching, the die manufacturing and delivery period is shortened, the die cost is reduced, the original strength and integrity of materials are guaranteed, the settlement risk is eliminated, and the size stability and mechanical robustness of the plate heat exchanger are effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a plate heat exchanger. BACKGROUND

[0002] The plate heat exchanger is a kind of efficient and compact heat exchange equipment, which is widely used in automobile thermal management, chemical industry, petroleum, heating ventilation air conditioning, metallurgy and other industries. The plate heat exchanger is usually formed by stacking multiple plate pieces, and each plate piece is provided with a plurality of tortuous flow channels on both sides. The media in the flow channels on both sides of each plate piece are different, so as to realize heat exchange between different media. The traditional plate heat exchanger plate is usually manufactured by stamping and drawing process, so as to form complex concave-convex corrugated flow channels on the plate. However, this manufacturing method has the following inherent defects:

[0003] 1. High mold cost and long cycle: the stamping die structure is complex, and the manufacturing precision is high, which leads to high cost and long development delivery cycle, and is not conducive to the rapid iteration and cost control of the product.

[0004] 2. Risk of material thinning: in order to form complex flow channels, the plate is stretched to form the flow channel side wall, and the stretching process will cause plastic deformation of the local material of the plate, which inevitably causes material thinning, forms a potential weak point of strength, and affects the pressure-bearing capacity and service life of the product.

[0005] 3. Insufficient structural stability: the cross section of the flow channel structure formed by stretching of the traditional plate in the stacking (lamination) direction needs to be connected under stress, and due to the characteristics of the stamping structure, it is easy to produce settlement or deformation, which affects the dimensional stability and mechanical robustness of the overall structure. SUMMARY

[0006] The purpose of the present application is to provide a plate heat exchanger which is simple in structure and has better durability.

[0007] To achieve the above object, the present application adopts the following technical scheme: a plate heat exchanger comprises a first base plate, a second base plate and at least one intermediate heat exchange layer, the first base plate is provided with a first medium inlet, a second medium inlet and a second medium outlet; the second base plate is oppositely arranged with the first base plate, and the second base plate is provided with a first medium outlet, the first medium outlet and the first medium inlet are arranged in the width direction of the first base plate; the at least one intermediate heat exchange layer is sealingly connected between the first base plate and the second base plate, the intermediate heat exchange layer comprises a first flow channel plate, a first heat exchange plate, a second flow channel plate and a second heat exchange plate which are sequentially connected in the thickness direction of the first base plate, the intermediate heat exchange layer is provided with four medium total channels, the medium total channels penetrate through the intermediate heat exchange layer in the thickness direction of the intermediate heat exchange layer, the four medium total channels are respectively communicated with the first medium inlet, the first medium outlet, the second medium inlet and the second medium outlet, the first flow channel plate is provided with a first medium flow channel, the first medium flow channel penetrates through the first flow channel plate in the thickness direction of the first flow channel plate, the first medium flow channel is communicated with the first medium inlet and the first medium outlet through two of the medium total channels, the second flow channel plate is provided with a second medium flow channel, the second medium flow channel penetrates through the second flow channel plate in the thickness direction of the second flow channel plate, and the second medium flow channel is communicated with the second medium inlet and the second medium outlet through the remaining two medium total channels.

[0008] Preferably, the first medium flow channel is in the shape of I or a serpentine shape with at least one bend.

[0009] Preferably, the connection between the inner wall of the first medium flow channel and the outer side wall of the medium total channel is transitioned by a round corner.

[0010] Preferably, the side of the first heat exchange plate facing the first flow channel plate is provided with a plurality of protrusions, the protrusions are located in the first medium flow channel, and in the thickness direction of the first flow channel plate, the height of the protrusions is equal to the depth of the first medium flow channel.

[0011] Preferably, the outer peripheral wall of the protrusion is in a round corner structure.

[0012] Preferably, the second heat exchange plate and the second medium flow channel are in matching shapes and located in the second medium flow channel, in the thickness direction of the second flow channel plate, the height of the second heat exchange plate is equal to the depth of the second medium flow channel, the side of the second heat exchange plate facing the first heat exchange plate is provided with a plurality of turbulence channels, and both ends of each turbulence channel are communicated with both ends of the first medium flow channel.

[0013] Preferably, along the length direction of the first substrate, the first medium inlet and the first medium outlet are located on the same side of the first substrate, the second medium inlet and the second medium outlet are located on the other side of the first substrate, and the first flow channel plate and the second flow channel plate are identical in shape and equal in size.

[0014] Preferably, the first heat exchange plate and the second heat exchange plate are identical in shape and equal in size.

[0015] Preferably, at least one of the first medium inlet, the first medium outlet, the second medium inlet and the second medium outlet is provided with a quick release joint.

[0016] Preferably, the outer peripheral wall of the second substrate and the outer peripheral wall of the intermediate heat exchange layer are flush.

[0017] The plate heat exchanger of the present application has the following advantages: when the plate heat exchanger is used, the first medium flows into the intermediate heat exchange layer from the first medium inlet, at this time, the first medium enters the first medium flow channel through the medium total channel and exchanges heat with the second medium through the first heat exchange plate, then enters another medium total channel under the guidance of the first medium flow channel, and then enters the next layer of intermediate heat exchange layer through the medium total channel or flows out from the first medium outlet; similarly, the second medium flows into the intermediate heat exchange layer from the second medium inlet, the second medium enters the second medium flow channel through the medium total channel and exchanges heat with the first medium through the second heat exchange plate, then enters another medium total channel under the guidance of the second medium flow channel, and then enters the next layer of intermediate heat exchange layer through the medium total channel or flows out from the second medium outlet. By arranging the intermediate heat exchange layer, on the one hand, the combination of the first flow channel plate and the first heat exchange plate and the combination of the second flow channel plate and the second heat exchange plate are used to replace the traditional stamping flow channel plate, the first flow channel plate, the first heat exchange plate, the second flow channel plate and the second heat exchange plate do not need to be formed by stamping and stretching, but only need to be processed by a simple blanking die, compared with the traditional complex stamping die, the mold manufacturing and delivery cycle is greatly shortened, the mold cost is significantly reduced, the product structure is simplified and the production cost is optimized, and at the same time, the risk of material thinning and work hardening caused by stretching is fundamentally avoided, the original strength and integrity of the material are guaranteed, the risk of material thinning is eliminated, and the pressure capacity, fatigue life and overall durability of the product are significantly improved; on the other hand, the first flow channel plate, the first heat exchange plate, the second flow channel plate and the second heat exchange plate are stacked along the thickness direction of the first substrate, the structure is compact and stable, and there is no stress on the structure of stamping and stretching, which eliminates the risk of settlement and effectively improves the size stability and mechanical robustness of the plate heat exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the plate heat exchanger of the embodiment of the present application;

[0019] Figure 2is an exploded view of a plate heat exchanger according to an embodiment of the present application;

[0020] Figure 3 is a structural schematic view of a first flow channel plate according to an embodiment of the present application;

[0021] Figure 4 is a structural schematic view of a first heat exchange plate according to an embodiment of the present application;

[0022] Figure 5 is a structural schematic view of a second heat exchange plate according to an embodiment of the present application.

[0023] In the figure: 1, first base plate; 11, first medium inlet; 12, second medium inlet; 13, second medium outlet; 14, quick release joint; 2, second base plate; 21, first medium outlet; 3, intermediate heat exchange layer; 31, first flow channel plate; 311, first medium flow channel; 312, first through hole; 32, first heat exchange plate; 321, second through hole; 322, protrusion; 33, second flow channel plate; 331, second medium flow channel; 332, third through hole; 34, second heat exchange plate; 341, fourth through hole; 342, turbulence passage. Specific embodiments

[0024] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the application, and not to limit the application. In addition, it should be noted that, for the sake of description, only the parts related to the application are shown in the drawings, not all the structures.

[0025] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique above of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique below of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0027] In the description of the present embodiments, the terms "upper", "lower", "right", "left", and the like, orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

[0028] Referring to Figures 1 to 5 As shown, according to the plate heat exchanger provided by the embodiments of the present application, the plate heat exchanger comprises a first substrate 1, a second substrate 2 and at least one intermediate heat exchange layer 3, the first substrate 1, the at least one intermediate heat exchange layer 3 and the second substrate 2 are stacked along the thickness direction (X direction in the figure) of the first substrate 1, and the first substrate 1 is provided with a first medium inlet 11, a second medium inlet 12 and a second medium outlet 13. The second substrate 2 is oppositely arranged with the first substrate 1, and both the second substrate 2 and the first substrate 1 are flat plate structures, the second substrate 2 is provided with a first medium outlet 21, and the first medium outlet 21 and the first medium inlet 11 are spaced apart along the width direction (Z direction in the figure) of the first substrate 1.

[0029] The at least one intermediate heat exchange layer 3 is sealingly connected between the first substrate 1 and the second substrate 2, and the intermediate heat exchange layer 3 comprises a first flow channel plate 31, a first heat exchange plate 32, a second flow channel plate 33 and a second heat exchange plate 34 connected in sequence along the thickness direction of the first substrate 1, the outer peripheral walls of the first flow channel plate 31, the first heat exchange plate 32, the second flow channel plate 33 and the second heat exchange plate 34 are flush, and the intermediate heat exchange layer 3 is provided with four medium total channels. The medium total channels pass through the intermediate heat exchange layer 3 along the thickness direction of the intermediate heat exchange layer 3 (i.e. the front-rear direction of the plate heat exchanger), the four medium total channels are respectively communicated with the first medium inlet 11, the first medium outlet 21, the second medium inlet 12 and the second medium outlet 13, the first flow channel plate 31 is provided with a first medium flow channel 311, the first medium flow channel 311 passes through the first flow channel plate 31 along the thickness direction of the first flow channel plate 31, the first medium flow channel 311 is communicated with the first medium inlet 11 and the first medium outlet 21 through two of the medium total channels, and the second flow channel plate 33 is provided with a second medium flow channel 331, the second medium flow channel 331 passes through the second flow channel plate 33 along the thickness direction of the second flow channel plate 33, and the second medium flow channel 331 is communicated with the second medium inlet 12 and the second medium outlet 13 through the remaining two medium total channels.

[0030] Specifically, the first flow channel plate 31 is provided with two first through holes 312 corresponding to the second medium inlet 12 and the second medium outlet 13 respectively, the first heat exchange plate 32 is provided with four second through holes 321 corresponding to the first medium inlet 11, the first medium outlet 21, the second medium inlet 12 and the second medium outlet 13 respectively, the second flow channel plate 33 is provided with two third through holes 332 corresponding to the first medium inlet 11 and the second medium inlet 12 respectively, and the second heat exchange plate 34 is provided with four fourth through holes 341 corresponding to the first medium inlet 11, the first medium outlet 21, the second medium inlet 12 and the second medium outlet 13 respectively. The two ends of the first medium flow channel 311, two of the second through holes 321, two of the third through holes 332 and two of the fourth through holes 341 are correspondingly connected to form two medium total channels, one of the two medium total channels is connected to the first medium inlet 11, and the other is connected to the first medium outlet 21; two of the first through holes 312, the remaining two of the second through holes 321, the two ends of the second medium flow channel 331 and the remaining two of the fourth through holes 341 are correspondingly connected to form another two medium total channels, one of the other two medium total channels is connected to the second medium inlet 12, and the other is connected to the second medium outlet 13. In this embodiment, the first flow channel plate 31, the first heat exchange plate 32, the second flow channel plate 33 and the second heat exchange plate 34 in the single intermediate heat exchange layer 3 are brazed and fixed, a plurality of intermediate heat exchange layers 3 are brazed and fixed, and the intermediate heat exchange layer 3 and the first base plate 1 and the second base plate 2 are brazed and fixed. The first medium and the second medium can be common heat exchange media such as water, water vapor and nitrogen, which will not be described here.

[0031] It can be understood that when the plate heat exchanger is used, the first medium flows into the intermediate heat exchange layer 3 from the first medium inlet 11. At this time, the first medium enters the first medium flow channel 311 through the medium total channel corresponding to the first medium inlet 11. The first medium in the first medium flow channel 311 exchanges heat with the second medium on the back side through the first heat exchange plate 32 and exchanges heat with the second medium on the front side through the second heat exchange plate 34. Then, the first medium is guided into the medium total channel corresponding to the first medium outlet 21 in the first medium flow channel 311. After that, the first medium sequentially passes through the second through hole 321, the third through hole 332 and the fourth through hole 341 into the next intermediate heat exchange layer 3 or flows out from the first medium outlet 21. Similarly, the second medium flows into the intermediate heat exchange layer 3 from the second medium inlet 12. At this time, the second medium enters the second medium flow channel 331 through the medium total channel corresponding to the second medium inlet 12 (sequentially passing through the first through hole 312 and the second through hole 321). The second medium in the second medium flow channel 331 exchanges heat with the first medium on the back side through the second heat exchange plate 34 and exchanges heat with the first medium on the front side through the first heat exchange plate 32. Then, the second medium is guided into the medium total channel corresponding to the second medium outlet 13 in the second medium flow channel 331. The second medium passes through the fourth through hole 341 into the next intermediate heat exchange layer 3 or flows out from the second medium outlet 13.

[0032] By arranging the intermediate heat exchange layer 3, on the one hand, the combination of the first flow channel plate 31 and the first heat exchange plate 32 and the combination of the second flow channel plate 33 and the second heat exchange plate 34 replace the traditional stamping flow channel plate. The first flow channel plate 31, the first heat exchange plate 32, the second flow channel plate 33 and the second heat exchange plate 34 do not need to be stretch formed by stamping, but only need to be simply blanked by a mold. Compared with the traditional complex stamping die, the mold manufacturing and delivery cycle is greatly shortened, the mold cost is significantly reduced, the product structure is simplified and the production cost is optimized. At the same time, the risk of material thinning and work hardening caused by stretching is fundamentally avoided, the original strength and integrity of the material are guaranteed, the risk of material thinning is eliminated, and the pressure capacity, fatigue life and overall durability of the product are significantly improved. On the other hand, the first flow channel plate 31, the first heat exchange plate 32, the second flow channel plate 33 and the second heat exchange plate 34 are stacked along the thickness direction of the first base plate 1, the structure is compact and stable, and there is no stress on the stretch structure, which eliminates the risk of settlement and effectively improves the size stability and mechanical robustness of the plate heat exchanger. In addition, the first flow channel plate 31 and the second flow channel plate 33 are isolated from each other, and the flow channel design freedom of the first flow channel plate 31 and the second flow channel plate 33 is large. Manufacturers can quickly and flexibly customize the design of the plate heat exchanger according to different process requirements and space limitations, effectively enhancing the flow and heat transfer performance of the plate heat exchanger.

[0033] In particular, the single intermediate heat exchange layer 3 is composed of the first flow channel plate 31, the first heat exchange plate 32, the second flow channel plate 33 and the second heat exchange plate 34, and adjacent two intermediate heat exchange layers 3 can share the same set of corresponding first flow channel plate 31 and first heat exchange plate 32 or the same set of corresponding second flow channel plate 33 and second heat exchange plate 34, thereby improving the arrangement flexibility of the plate heat exchanger and constructing the plate heat exchanger suitable for various working conditions and different media.

[0034] In some embodiments, the first medium inlet 11 and the first medium outlet 21 are arranged at intervals along the length direction (Y direction in the figure) of the first base plate 1, and at this time, the first medium flow channel 311 has an I-shaped profile, and the first medium flow channel 311 is parallel to the length direction of the first base plate 1 or arranged at an angle with the long side of the first base plate 1.

[0035] The I-shaped first medium flow channel 311 can effectively simplify the structure of the first flow channel plate 31 and reduce the design and production cost of the first flow channel plate 31.

[0036] Referring to Figure 3 It can be understood that the first medium flow channel 311 has a serpentine shape with at least one bend. Alternatively, the first medium flow channel 311 has one bend, and the first medium flow channel 311 has a U-shaped profile (part of the serpentine shape), the first medium flow channel 311 has two bends, and the first medium flow channel 311 has an S-shaped profile (part of the serpentine shape), and the first medium flow channel 311 has three or more bends, and the first medium flow channel 311 has a zigzag serpentine shape. Hereinafter, the first medium flow channel 311 with a U-shaped profile will be taken as an example for description, and the following will not be repeated.

[0037] By arranging the serpentine first medium flow channel 311, the heat exchange path of the first medium can be greatly extended in a limited space, and the heat exchange efficiency of the first medium can be improved. It should be noted that the second medium flow channel 331 and the first medium flow channel 311 are isolated from each other, and the profile of the second medium flow channel 331 can be the same as or different from that of the first medium flow channel 311, which will not be repeated here.

[0038] Referring to Figure 2 and Figure 3 It can be understood that the connection between the inner wall of the first medium flow channel 311 and the outer side wall of the first flow channel plate 31 part (i.e. the outer side wall of the first through hole 312) is transitioned by a round corner.

[0039] The first medium flow channel 311 and the outer side wall of the first through hole 312 are connected by a round corner structure, which can guide the flow of the first medium in the first medium flow channel 311, reduce the impact force received by the first medium, reduce the flow resistance of the first medium flow channel 311, and effectively improve the structural rationality of the first flow channel plate 31. Similarly, the inner wall of the second medium flow channel 331 and the outer side wall of the third through hole 332 also adopt a round corner transition, thereby reducing the flow resistance of the second medium flow channel 331.

[0040] Referring to Figure 2 and Figure 4 As shown in FIG. 2, it can be understood that one side of the first flow channel plate 31 of the first heat exchange plate 32 is provided with a plurality of protrusions 322, which are irregularly distributed in a longitudinal and transverse cross pattern. The protrusions 322 are located in the first medium flow channel 311 and along the thickness direction of the first flow channel plate 31. The height of the protrusions 322 is equal to the depth of the first medium flow channel 311, that is, the side of the protrusions 322 away from the second flow channel plate 33 is flush with the side of the first flow channel plate 31 away from the second flow channel plate 33. After the plate heat exchanger is assembled, the protrusions 322 abut against the front second heat exchange plate 34 or the first base plate 1. The plurality of protrusions 322 have a blank area for avoiding the side wall of the first medium flow channel 311. It is particularly pointed out here to avoid misunderstanding.

[0041] By providing a plurality of protrusions 322, the first medium entering the first medium flow channel 311 is disturbed by the plurality of protrusions 322 to form a turbulent flow, so that the higher temperature part inside the first medium is turned out to the outside for heat exchange, further improving the heat exchange efficiency of the first medium.

[0042] Referring to Figure 4 As shown in FIG. 2, it can be understood that the outer peripheral wall of the protrusion 322 is a round corner structure, that is, the outer shape of the protrusion 322 is spherical or ellipsoidal.

[0043] The outer peripheral wall of the protrusion 322 is provided with a round corner structure. When the first medium hits the protrusion 322 at various angles, it can continue to flow under the guidance of the round corner of the protrusion 322, without forming turbulent flow to affect the flow of the first medium, further reducing the flow resistance of the first medium flow channel 311.

[0044] Referring to Figure 5As shown, it can be understood that the second heat exchange plate 34 and the second medium flow channel 331 are shaped and located within the second medium flow channel 331. Along the thickness direction of the second flow channel plate 33, the height of the second heat exchange plate 34 is equal to the depth of the second medium flow channel 331. The side of the second heat exchange plate 34 facing the first heat exchange plate 32 is provided with multiple turbulence channels 342, and both ends of each turbulence channel 342 are connected to both ends of the first medium flow channel 311. The second heat exchange plate 34 is designed and manufactured according to the internal space of the second flow channel plate 33 and the shape of the second medium flow channel 331 to ensure that the second heat exchange plate 34 and the second medium flow channel 331 are highly matched and seamlessly integrated.

[0045] By setting a second heat exchange plate 34 within the second medium flow channel 331, the second medium flow channel 331 is divided into several smaller turbulence channels 342, which separates the second medium originally located within the second medium flow channel 331 into multiple fine streams, greatly increasing the heat exchange area of ​​the second medium and improving the heat exchange efficiency of the second medium.

[0046] Reference Figure 1 and Figure 2 As shown, it can be understood that along the length of the first substrate 1, the first dielectric inlet 11 and the first dielectric outlet 21 are located on the same side of the first substrate 1, while the second dielectric inlet 12 and the second dielectric outlet 13 are located on the other side of the first substrate 1. That is, the first dielectric inlet 11 and the second dielectric inlet 12 (or the second dielectric outlet 13) are arranged diagonally on a projection plane parallel to the first substrate 1, and the first dielectric outlet 21 and the second dielectric outlet 13 (or the second dielectric inlet 12) are arranged diagonally on a projection plane parallel to the first substrate 1. At this time, the first flow channel plate 31 and the second flow channel plate 33 have the same shape and are equal in size.

[0047] The first medium inlet 11, the first medium outlet 21, the second medium inlet 12, and the second medium outlet 13 are respectively arranged at the four corners of the first substrate 1. On the projection plane parallel to the first substrate 1, the projections of the first medium inlet 11 and the first medium outlet 21 are centrally symmetrical with the projections of the second medium inlet 12 and the second medium outlet 13. Therefore, the first flow channel plate 31 and the second flow channel plate 33 can be set to the same specifications. When assembling the plate heat exchanger, the first flow channel plate 31 can be used as the second flow channel plate 33 by rotating it 180° around an axis parallel to the thickness direction of the first substrate 1, and the second flow channel plate 33 can be used as the first flow channel plate 31 by rotating it 180° around an axis parallel to the thickness direction of the first substrate 1. This effectively improves the structural consistency and interchangeability of the intermediate heat exchange layer 3.

[0048] Reference Figure 2 As shown, it can be understood that the first heat exchange plate 32 and the second heat exchange plate 34 have the same shape and are equal in size.

[0049] In the premise that the first flow channel plate 31 and the second flow channel plate 33 are of the same specification, the first heat exchange plate 32 and the second heat exchange plate 34 can also be of the same specification. When assembling the plate heat exchanger, the first heat exchange plate 32 can be used as the second heat exchange plate 34 by rotating the first heat exchange plate 32 by 180° around the rotation shaft parallel to the thickness direction of the first base plate 1, and the second heat exchange plate 34 can be used as the first heat exchange plate 32 by rotating the second heat exchange plate 34 by 180° around the rotation shaft parallel to the thickness direction of the first base plate 1. The structural consistency and interchangeability of the intermediate heat exchange layer 3 are further improved. The manufacturer only needs to design and produce one specification of heat exchange plate and flow channel plate to assemble the intermediate heat exchange layer 3, and the design and production cost of the intermediate heat exchange layer 3 is further reduced.

[0050] In particular, the first heat exchange plate 32 has at least three forms of flat plate, flat plate with protrusions 322, and flat plate with turbulence channels 342, and the second heat exchange plate 34 also has three forms of flat plate, flat plate with protrusions 322, and flat plate with turbulence channels 342. In the actual production and use of the plate heat exchanger, the first heat exchange plate 32 and the second heat exchange plate 34 can be the same or different. For example, the first heat exchange plate 32 is set as a flat plate, and the second heat exchange plate 34 is also set as a flat plate, or the first heat exchange plate 32 is set as a flat plate with protrusions 322, and the second heat exchange plate 34 is set as a flat plate with turbulence channels 342. The first heat exchange plate 32 and the second heat exchange plate 34 can select appropriate structures according to actual use requirements. It is particularly stated here to avoid misunderstanding.

[0051] Referring to Figure 1 and Figure 2 It can be understood that at least one of the first medium inlet 11, the first medium outlet 21, the second medium inlet 12, and the second medium outlet 13 is provided with a quick release joint 14.

[0052] When assembling the plate heat exchanger, the quick release joint 14 can be arranged on the first medium inlet 11, the first medium outlet 21, the second medium inlet 12, and the second medium outlet 13 according to actual needs, which facilitates subsequent line connection of the plate heat exchanger and improves the convenience of disassembly and assembly of the plate heat exchanger. In addition, when assembling the plate heat exchanger, the first base plate 1 or the quick release joint 14 at the first medium inlet 11 can be used as a reference, and then the intermediate heat exchange layer 3 (the intermediate heat exchange layer 3 is stacked and fixed in the order of the first flow channel plate 31, the first heat exchange plate 32, the second flow channel plate 33, and the second heat exchange plate 34) and the second base plate 2 are sequentially stacked and fixed. All components are integrally brazed to form a solid unit, improving the structural stability of the plate heat exchanger as a whole.

[0053] Referring to Figure 1 It can be understood that the outer peripheral wall of the second base plate 2 is flush with the outer peripheral wall of the intermediate heat exchange layer 3.

[0054] Through the above setting, the plate heat exchanger is ensured without extra protruding structure on the outer wall, the transverse size of the plate heat exchanger is reduced, and the appearance of the plate heat exchanger is improved.

[0055] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, all the implementation modes need not and cannot be exhausted. Any modification, equivalent substitution and improvement within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A plate heat exchanger, characterized in that, include: The first substrate (1) is provided with a first dielectric inlet (11), a second dielectric inlet (12) and a second dielectric outlet (13); The second substrate (2) is disposed opposite to the first substrate (1). The second substrate (2) is provided with a first medium outlet (21). The first medium outlet (21) and the first medium inlet (11) are spaced apart along the width direction of the first substrate (1). At least one intermediate heat exchange layer (3) is sealed between the first substrate (1) and the second substrate (2). The intermediate heat exchange layer (3) includes a first flow channel plate (31), a first heat exchange plate (32), a second flow channel plate (33), and a second heat exchange plate (34) connected sequentially along the thickness direction of the first substrate (1). The intermediate heat exchange layer (3) is provided with four medium general channels. The medium general channels penetrate the intermediate heat exchange layer (3) along the thickness direction. The four medium general channels are respectively connected to the first medium inlet (11), the first medium outlet (21), the second medium inlet (12), and the second medium outlet (13). The first flow channel... The plate (31) is provided with a first medium flow channel (311), which extends through the first flow channel plate (31) along the thickness direction. The first medium flow channel (311) is connected to the first medium inlet (11) and the first medium outlet (21) through two of the medium general channels. The second flow channel plate (33) is provided with a second medium flow channel (331), which extends through the second flow channel plate (33) along the thickness direction. The second medium flow channel (331) is connected to the second medium inlet (12) and the second medium outlet (13) through the other two medium general channels.

2. The plate heat exchanger according to claim 1, characterized in that, The first medium flow channel (311) has an I-shaped shape or a serpentine shape with at least one bend.

3. The plate heat exchanger according to claim 2, characterized in that, The connection between the inner wall of the first medium flow channel (311) and the outer wall of the main medium channel is transitioned by a rounded corner.

4. The plate heat exchanger according to claim 2, characterized in that, The first heat exchange plate (32) has a plurality of protrusions (322) on the side facing the first flow channel plate (31). The protrusions (322) are located in the first medium flow channel (311) and along the thickness direction of the first flow channel plate (31), the height of the protrusions (322) is equal to the depth of the first medium flow channel (311).

5. The plate heat exchanger according to claim 4, characterized in that, The outer peripheral wall of the protrusion (322) has a rounded corner structure.

6. The plate heat exchanger according to claim 2, characterized in that, The second heat exchange plate (34) and the second medium flow channel (331) are matched in shape and located in the second medium flow channel (331). Along the thickness direction of the second flow channel plate (33), the height of the second heat exchange plate (34) and the depth of the second medium flow channel (331) are equal. The second heat exchange plate (34) is provided with a plurality of turbulence channels (342) on the side facing the first heat exchange plate (32). Both ends of each turbulence channel (342) are connected to both ends of the first medium flow channel (311).

7. The plate heat exchanger according to any one of claims 1-6, characterized in that, Along the length of the first substrate (1), the first medium inlet (11) and the first medium outlet (21) are located on the same side of the first substrate (1), the second medium inlet (12) and the second medium outlet (13) are located on the other side of the first substrate (1), and the first flow channel plate (31) and the second flow channel plate (33) have the same shape and the same size.

8. The plate heat exchanger according to claim 7, characterized in that, The first heat exchange plate (32) and the second heat exchange plate (34) have the same shape and are the same size.

9. The plate heat exchanger according to claim 1, characterized in that, At least one of the first medium inlet (11), the first medium outlet (21), the second medium inlet (12), and the second medium outlet (13) is provided with a quick-release connector (14).

10. The plate heat exchanger according to claim 1, characterized in that, The outer peripheral wall of the second substrate (2) is flush with the outer peripheral wall of the intermediate heat exchange layer (3).

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