Plate heat exchanger

Abstract

This invention provides a plate heat exchanger. The flow-changing baffle of the plate heat exchanger includes a first stop portion and a second stop portion spaced apart along the axial direction of the channel, and also includes a support structure; the support structure is disposed and supported between the first stop portion and the second stop portion. A receiving space is formed between the first stop portion, the second stop portion, and the support structure, or the receiving space is provided on the support structure. For the flow-changing baffle in the first manifold, the receiving space is connected to a second heat exchange channel, so that a second heat exchange medium flows into the receiving space, so that the second heat exchange medium in the receiving space exchanges heat with the first heat exchange medium on both sides of the flow-changing baffle. The flow-changing baffle of this application has strong impact resistance and can improve heat exchange performance.

Description

Technical Field

[0001] This invention relates to the field of plate heat exchanger technology, and more specifically, to a plate heat exchanger. Background Technology

[0002] Thermal management systems are one of the core components of new energy vehicles. To achieve high efficiency, low cost, and reliability, the performance and pressure resistance requirements for thermal management systems are becoming increasingly stringent.

[0003] In order to improve the heat exchange performance of plate heat exchangers within a limited space, stop components are installed in the heat exchange channels to change the fluid flow direction and form multi-pass designs such as two-pass and three-pass, so as to increase the heat exchange area and thus improve the heat exchange performance of plate heat exchangers.

[0004] However, the existing stop components have poor impact resistance and insufficient durability and reliability. Under high pressure, the stop components are prone to deformation or even breakage, which can lead to leakage problems. Summary of the Invention

[0005] The main objective of this invention is to provide a plate heat exchanger that gives the flow baffles of the plate heat exchanger strong impact resistance and improves heat exchange performance.

[0006] To achieve the above objectives, the present invention provides a plate heat exchanger, comprising a flow baffle and a plurality of sequentially stacked heat exchange plates, with a heat exchange channel formed between adjacent heat exchange plates; the plurality of heat exchange channels include alternating first heat exchange channels and second heat exchange channels; through holes on the plurality of heat exchange plates are sequentially connected to form channels for the inflow or outflow of heat exchange medium; the plate heat exchanger includes a first manifold, a second manifold, a third manifold, and a fourth manifold; the first heat exchange channel is connected to the first manifold and the second manifold to form a first channel for the flow of a first heat exchange medium; the second heat exchange channel is connected to the third manifold and the fourth manifold to form a second channel for the flow of a second heat exchange medium; the first heat exchange medium and the second heat exchange medium exchange heat through the plate heat exchanger.

[0007] A flow-changing baffle is provided inside the first manifold, which divides the first manifold into a first pipe segment and a second pipe segment in its axial direction. The flow-changing baffle includes: a first stop portion and a second stop portion distributed at intervals along the axial direction of the first manifold; and a support structure disposed and supported between the first stop portion and the second stop portion. A receiving space is formed between the first stop portion, the second stop portion, and the support structure, or a receiving space is provided on the support structure. The receiving space of the flow-changing baffle in the first manifold is connected to a second heat exchange channel so that the second heat exchange medium flows into the receiving space of the flow-changing baffle in the first manifold.

[0008] In some embodiments, the support structure is a support portion that fills the space between the first stop portion and the second stop portion, and the accommodating space is provided on the support portion.

[0009] In some embodiments, a protrusion is provided on the surface of the first stop portion facing the second stop portion, and the protruding end face of the protrusion contacts the second stop portion; the protrusion is used to form a support structure; the space between the first stop portion and the second stop portion forms a receiving space. And / or, a protrusion is provided on the surface of the second stop portion facing the first stop portion, and the protruding end face of the protrusion contacts the first stop portion; the protrusion is used to form a support structure; the space between the first stop portion and the second stop portion forms a receiving space.

[0010] Optionally, the surface of the first stop portion facing the second stop portion is provided with a plurality of protrusions spaced apart; and / or, the surface of the second stop portion facing the first stop portion is provided with a plurality of protrusions spaced apart.

[0011] Optionally, when a protrusion is provided on the surface of the first stop portion facing the second stop portion, and a protrusion is provided on the surface of the second stop portion facing the first stop portion, the protrusion and the protrusion are arranged opposite to each other so that the protruding end face of the protrusion and the protruding end face of the protrusion are in contact.

[0012] Optionally, the surface of the first stop portion facing the second stop portion includes a first face portion and a second face portion, and a protrusion is provided on the first face portion; the surface of the second stop portion facing the first stop portion includes a third face portion and a fourth face portion, and a protrusion is provided on the fourth face portion; the protruding end face of the protrusion is in contact with the third face portion, and the protruding end face of the protrusion is in contact with the second face portion.

[0013] Optionally, the first stop is a plate-like structure; a portion of the plate of the first stop protrudes towards the direction close to the second stop, so that the protruding portion of the first stop forms a protrusion; or, a portion of the plate of the first stop protrudes away from the second stop, so that the non-protruding portion of the first stop forms a protrusion.

[0014] Optionally, the second stop is a plate-like structure; a portion of the plate of the second stop protrudes towards the direction close to the first stop, so that the protruding portion of the plate of the second stop forms a protrusion; or, a portion of the plate of the second stop protrudes away from the first stop, so that the non-protruding portion of the plate of the second stop forms a protrusion.

[0015] Optionally, the two heat exchange plates of the second heat exchange channel, which are connected to the receiving space of the flow exchange baffle in the first manifold, are the first heat exchange plate and the second heat exchange plate, respectively. The first stop part and the second stop part of the flow exchange baffle in the first manifold are respectively connected and fixed to the first heat exchange plate and the second heat exchange plate.

[0016] Optionally, the first stop and the first heat exchange plate are integrally formed.

[0017] Optionally, the second stop and the second heat exchange plate are integrally formed.

[0018] According to the technical solution of this invention, the flow-changing baffle of the plate heat exchanger includes a first stop portion and a second stop portion distributed at intervals along the axial direction of the channel; the flow-changing baffle also includes a support structure, which is disposed between the first stop portion and the second stop portion, so that the support structure is supported between the first stop portion and the second stop portion. Providing a support structure can increase the overall structural strength of the flow-changing baffle, giving the flow-changing baffle a stronger impact resistance, thereby meeting high pressure resistance requirements.

[0019] A receiving space is formed between the first stop, the second stop, and the supporting structure, or the supporting structure is provided with a receiving space. For the flow-changing baffle in the first manifold, the receiving space is connected to a second heat exchange channel, allowing the second heat exchange medium to flow into the receiving space. This enables heat exchange between the second heat exchange medium in the receiving space and the first heat exchange medium on both sides of the flow-changing baffle, meaning that heat exchange between the two heat exchange media can occur at the flow-changing baffle. This increases the heat exchange area of ​​the two heat exchange media, thereby increasing the heat exchange capacity and improving heat exchange performance. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 A schematic diagram showing the flow patterns of the first and second heat exchange media in a plate heat exchanger without commutation baffles is shown.

[0022] Figure 2 The diagram shows the flow patterns of the first and second heat exchange media in a plate heat exchanger where the first manifold of the first manifold is equipped with a flow exchange baffle and the second manifold is not equipped with a flow exchange baffle.

[0023] Figure 3 The diagram shows the flow pattern of the first heat exchange medium in a plate heat exchanger where the first manifold of the first manifold is equipped with a flow exchange baffle and the second manifold is not equipped with a flow exchange baffle.

[0024] Figure 4A schematic diagram of a converter baffle without a support structure is shown.

[0025] Figure 5 A schematic diagram of the converter baffle according to Embodiment 1 of the present invention is shown;

[0026] Figure 6 A schematic diagram of a converter baffle according to Embodiment 5 of the present invention is shown;

[0027] Figure 7 A schematic diagram of the converter baffle according to Embodiment Six of the present invention is shown;

[0028] Figure 8 A schematic diagram of another structure of the converter baffle according to Embodiment 5 of the present invention is shown.

[0029] The above figures include the following reference numerals:

[0030] 10. Heat exchange plates;

[0031] 20. Heat exchange channel; 21. First heat exchange channel; 22. Second heat exchange channel;

[0032] 31. First manifold; 311. First pipe section; 312. Second pipe section; 32. Second manifold; 33. Third manifold; 34. Fourth manifold;

[0033] 40. Flow stop; 41. First stop; 411. Protrusion; 412. First face; 413. Second face; 42. Second stop; 421. Protrusion; 422. Third face; 423. Fourth face; 43. Accommodation space; 431. Support. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] The present invention provides a plate heat exchanger, which includes a plurality of heat exchange plates 10 stacked in sequence, and a heat exchange channel 20 is formed between two adjacent heat exchange plates 10; the plate heat exchanger includes a plurality of heat exchange channels 20 arranged in sequence, and the plurality of heat exchange channels 20 includes a first heat exchange channel 21 and a second heat exchange channel 22 arranged alternately.

[0038] Optionally, the heat exchange channel 20 in odd-numbered order among the plurality of heat exchange channels 20 is the first heat exchange channel 21, and the heat exchange channel 20 in even-numbered order among the plurality of heat exchange channels 20 is the second heat exchange channel 22.

[0039] Each heat exchange plate 10 is provided with a through hole, and the through holes on multiple heat exchange plates 10 are connected in sequence to form a channel for the heat exchange medium to flow in or out.

[0040] Specifically, the plate heat exchanger includes a first manifold 31, a second manifold 32, a third manifold 33, and a fourth manifold 34.

[0041] Specifically, each heat exchange plate 10 is provided with four through holes, namely a first inflow through hole, a first outflow through hole, a second inflow through hole, and a second outflow through hole; the first inflow through holes on multiple heat exchange plates 10 are connected in sequence to form a first manifold 31 for the inflow of the first heat exchange medium; the first outflow through holes on multiple heat exchange plates 10 are connected in sequence to form a second manifold 32 for the outflow of the first heat exchange medium; the second inflow through holes on multiple heat exchange plates 10 are connected in sequence to form a third manifold 33 for the inflow of the second heat exchange medium; and the second outflow through holes on multiple heat exchange plates 10 are connected in sequence to form a fourth manifold 34 for the outflow of the second heat exchange medium. The first manifold group includes the first manifold 31 and the second manifold 32, and the second manifold group includes the third manifold 33 and the fourth manifold 34.

[0042] All first heat exchange channels 21 are connected to the first manifold 31, and all first heat exchange channels 21 are connected to the second manifold 32 to form a first channel for the flow of the first heat exchange medium; all second heat exchange channels 22 are connected to the third manifold 33, and all second heat exchange channels 22 are connected to the fourth manifold 34 to form a second channel for the flow of the second heat exchange medium; the first heat exchange medium and the second heat exchange medium exchange heat through a plate heat exchanger.

[0043] A sealing gasket is provided between two adjacent heat exchange plates 10 so that each first heat exchange channel 21 is connected to the first manifold 31 and each first heat exchange channel 21 is connected to the second manifold 32; and each second heat exchange channel 22 is connected to the third manifold 33 and each second heat exchange channel 22 is connected to the fourth manifold 34.

[0044] like Figure 1 As shown, the first heat exchange medium in each first heat exchange channel 21 exchanges heat with the second heat exchange medium in the adjacent second heat exchange channel 22, and the second heat exchange medium in each second heat exchange channel 22 exchanges heat with the first heat exchange medium in the adjacent first heat exchange channel 21.

[0045] Optionally, one of the first heat exchange medium and the second heat exchange medium is a refrigerant and the other is a coolant.

[0046] In this application, the plate heat exchanger also includes a flow-changing baffle 40; the flow-changing baffle 40 is provided in the first manifold 31 to change the flow path of the first heat exchange medium, thereby enabling a multi-flow design of the flow path of the first heat exchange medium.

[0047] Specifically, in the first manifold group, such as Figure 2 and Figure 3 As shown, a flow exchange baffle 40 is provided in the first manifold 31, while no flow exchange baffle 40 is provided in the second manifold 32; the direction from the first end to the second end of the first manifold 31 is the same as the direction from the first end to the second end of the second manifold 32; the first end of the first manifold 31 is the input end of the first heat exchange medium; the second end of the first manifold 31 is open, so that the second end of the first manifold 31 is the output end of the first heat exchange medium; the first end of the second manifold 32 is closed, and the second end of the second manifold 32 is closed.

[0048] The flow-changing baffle divides the first manifold 31 axially into a first pipe section 311 and a second pipe section 312. Among the plurality of first heat exchange channels 21, the one located on the side of the flow-changing baffle 40 facing the first end of the first manifold 31 is the first portion of the first heat exchange channel 21; among the plurality of first heat exchange channels 21, the one located on the side of the flow-changing baffle 40 facing the second end of the first manifold 31 is the second portion of the first heat exchange channel 21. Under the stopping action of the flow-changing baffle 40, the first heat exchange medium flowing from the first end of the first manifold 31 flows into the first pipe section 311, then into the first portion of the first heat exchange channel 21, then into the second manifold 32, then into the second portion of the first heat exchange channel 21, then into the second pipe section 312, and finally flows out from the second end of the first manifold 31. It can be seen that due to the stopping action of the flow-changing baffle 40, the flow direction of the first heat exchange medium changes, that is, the flow channel of the first heat exchange medium changes.

[0049] like Figure 1As shown, if no flow-changing baffle 40 is provided in the first manifold 31, the first heat exchange medium flowing into the first end of the first manifold 31 will flow to all the first heat exchange channels 21 and then flow out from the second manifold 32. However, if a flow-changing baffle 40 is provided in the first manifold 31, the first heat exchange medium flowing into the first end of the first manifold 31 will only flow to the first heat exchange channels 21 located on the side of the flow-changing baffle 40 facing the first end of the first manifold 31 under the blocking action of the flow-changing baffle 40. Compared with the flow to all the first heat exchange channels 21 when no flow-changing baffle 40 is provided, by providing the flow-changing baffle 40 so that it only flows to a portion of the first heat exchange channels 21, under the condition that the total amount of the first heat exchange medium entering the first end of the first manifold 31 remains unchanged, the flow rate of the first heat exchange medium flowing to a portion of the first heat exchange channels 21 is increased by reducing the number of first heat exchange channels 21.

[0050] In this application, the commutator 40 includes a first stop portion 41 and a second stop portion 42 distributed axially along the first manifold 31; the commutator 40 also includes a support structure disposed between the first stop portion 41 and the second stop portion 42, so that the support structure is supported between the first stop portion 41 and the second stop portion 42.

[0051] In the first manifold assembly, the direction of the first stop portion 41 to the second stop portion 42 of the converter baffle 40 is the same as the direction of the first end to the second end of the first manifold 31; the first stop portion 41 is used to withstand the impact from the first heat exchange medium. A support structure is supported between the first stop portion 41 and the second stop portion 42. When the first stop portion 41 is subjected to the impact force from the first heat exchange medium, the support structure can generate a supporting force on the first stop portion 41, thereby improving the impact resistance of the converter baffle 40. Figure 4 Compared to not having a supporting structure, having a supporting structure can increase the overall structural strength of the converter baffle 40, so that the converter baffle 40 as a whole has strong impact resistance, thereby meeting the high pressure resistance requirements.

[0052] Specifically, in the first manifold 31, the first stop 41 is fixedly connected to the channel wall of the first manifold 31, and the second stop 42 is fixedly connected to the channel wall of the first manifold 31.

[0053] In this application, a receiving space 43 is formed between the first stop 41, the second stop 42, and the support structure, or the receiving space 43 is provided on the support structure.

[0054] For the flow exchange baffle 40 in the first manifold 31, the accommodating space 43 is connected to a second heat exchange channel 22 so that the second heat exchange medium flows into the accommodating space 43, so that the second heat exchange medium in the accommodating space 43 exchanges heat with the first heat exchange medium on both sides of the flow exchange baffle 40, that is, the heat exchange of the two heat exchange media can also be carried out at the flow exchange baffle 40.

[0055] In this application, the two heat exchange plates 10 of the second heat exchange channel 22, which is connected to the receiving space 43 of the flow exchange baffle 40 in the first manifold 31, are the first heat exchange plate and the second heat exchange plate, respectively. The first stop portion 41 and the second stop portion 42 of the flow exchange baffle 40 in the first manifold 31 are respectively connected and fixed to the first heat exchange plate and the second heat exchange plate.

[0056] Specifically, the first stop portion 41 of the flow baffle 40 in the first manifold 31 is connected and fixed to the wall of the first inflow through hole of the first heat exchange plate, and the second stop portion 42 of the flow baffle 40 in the first manifold 31 is connected and fixed to the wall of the first inflow through hole of the second heat exchange plate.

[0057] Optionally, the first stop portion 41 of the commutator baffle 40 in the first manifold 31 is integrally formed with the first heat exchange plate, and the second stop portion 42 of the commutator baffle 40 in the first manifold 31 is integrally formed with the second heat exchange plate.

[0058] Optionally, the first stop 41 is a plate-shaped structure, and the second stop 42 is a plate-shaped structure.

[0059] Example 1

[0060] In an embodiment, such as Figure 5 As shown, the support structure is a support portion 431 filled between the first stop portion 41 and the second stop portion 42, and the accommodating space 43 is provided on the support portion 431.

[0061] Optionally, the support 431 is made of fins spliced ​​together, and the gaps between the fins form an accommodating space 43.

[0062] Example 2

[0063] In an embodiment, a protrusion 411 is provided on the surface of the first stop portion 41 facing the second stop portion 42, and the protruding end face of the protrusion 411 contacts the second stop portion 42; the protrusion 411 is used to form a support structure, that is, the support structure includes the protrusion 411; the space between the first stop portion 41 and the second stop portion 42 forms an accommodating space 43.

[0064] Optionally, the surface of the first stop portion 41 facing the second stop portion 42 is provided with a plurality of protrusions 411 distributed at intervals, that is, the support structure includes a plurality of protrusions 411.

[0065] Optionally, a portion of the plate of the first stop portion 41 protrudes toward the direction close to the second stop portion 42, so that the protruding portion of the plate of the first stop portion 41 forms a protrusion 411; or, a portion of the plate of the first stop portion 41 protrudes away from the second stop portion 42, so that the non-protruding portion of the plate of the first stop portion 41 forms a protrusion 411.

[0066] Optionally, the protruding end face of the protrusion 411 is in fixed contact with the second stop 42.

[0067] Optionally, the protruding end face of the protrusion 411 is welded to the second stop 42.

[0068] Example 3

[0069] In an embodiment, a protrusion 421 is provided on the surface of the second stop portion 42 facing the first stop portion 41, and the protruding end face of the protrusion 421 contacts the first stop portion 41; the protrusion 421 is used to form a support structure, that is, the support structure includes the protrusion 421; the space between the first stop portion 41 and the second stop portion 42 forms an accommodating space 43.

[0070] Optionally, the second stop portion 42 has a plurality of protrusions 421 spaced apart on its surface facing the first stop portion 41, that is, the support structure includes a plurality of protrusions 421.

[0071] Optionally, a portion of the plate of the second stop portion 42 protrudes toward the direction close to the first stop portion 41, so that the protruding portion of the plate of the second stop portion 42 forms a protrusion 421; or, a portion of the plate of the second stop portion 42 protrudes away from the first stop portion 41, so that the non-protruding portion of the plate of the second stop portion 42 forms a protrusion 421.

[0072] Optionally, the protruding end face of the protrusion 421 is in fixed contact with the first stop 41.

[0073] Optionally, the protruding end face of the protrusion 421 is welded to the first stop 41.

[0074] Example 4

[0075] In an embodiment, such as Figures 6 to 8 As shown, a protrusion 411 is provided on the surface of the first stop portion 41 facing the second stop portion 42, and the protruding end face of the protrusion 411 contacts the second stop portion 42; the protrusion 411 is used to form a support structure; the space between the first stop portion 41 and the second stop portion 42 forms an accommodating space 43.

[0076] The second stop portion 42 has a protruding portion 421 on its surface facing the first stop portion 41, and the protruding end face of the protruding portion 421 contacts the first stop portion 41; the protruding portion 421 is used to form a support structure; the space between the first stop portion 41 and the second stop portion 42 forms an accommodating space 43.

[0077] The support structure includes a protrusion 421 and a protrusion 411.

[0078] Optionally, the surface of the first stop portion 41 facing the second stop portion 42 is provided with a plurality of protrusions 411 distributed at intervals, that is, the support structure includes a plurality of protrusions 411.

[0079] Optionally, the second stop portion 42 has a plurality of protrusions 421 spaced apart on its surface facing the first stop portion 41, that is, the support structure includes a plurality of protrusions 421.

[0080] Optionally, such as Figure 8 As shown, a portion of the plate of the first stop portion 41 protrudes towards the second stop portion 42, so that the protruding portion of the plate of the first stop portion 41 forms a protrusion 411; or, as... Figure 6 As shown, a portion of the plate of the first stop portion 41 protrudes in a direction away from the second stop portion 42, so that the non-protruding portion of the plate of the first stop portion 41 forms a protrusion 411.

[0081] Optionally, such as Figure 8 As shown, a portion of the plate of the second stop portion 42 protrudes towards the first stop portion 41, so that the protruding portion of the plate of the second stop portion 42 forms a protrusion 421; or, as Figure 6 As shown, a portion of the plate of the second stop portion 42 protrudes in a direction away from the first stop portion 41, so that the non-protruding portion of the plate of the second stop portion 42 forms a protrusion 421.

[0082] Optionally, the protruding end face of the protrusion 411 is in fixed contact with the second stop 42; the protruding end face of the protrusion 421 is in fixed contact with the first stop 41.

[0083] Optionally, the protruding end face of the protrusion 411 is welded to the second stop 42; the protruding end face of the protrusion 421 is welded to the first stop 41.

[0084] Example 5

[0085] Example 5 is a further modification based on Example 4.

[0086] In an embodiment, such as Figure 6 and Figure 8As shown, the protrusion 411 and the protrusion 421 are arranged opposite to each other so that the protruding end face of the protrusion 411 and the protruding end face of the protrusion 421 are in contact.

[0087] Optionally, when a protrusion 411 is provided on the surface of the first stop portion 41 facing the second stop portion 42, and when a plurality of protrusions 421 distributed at intervals are provided on the surface of the second stop portion 42 facing the first stop portion 41, the plurality of protrusions 411 and the plurality of protrusions 421 are provided in a one-to-one correspondence.

[0088] Optionally, the protruding end face of the protrusion 411 and the protruding end face of the protrusion 421 are in fixed contact.

[0089] Optionally, the protruding end face of the protrusion 411 and the protruding end face of the protrusion 421 are welded together.

[0090] Example 6

[0091] Example 6 is a further modification based on Example 4.

[0092] In an embodiment, such as Figure 7 As shown, the surface of the first stop portion 41 facing the second stop portion 42 includes a first face portion 412 and a second face portion 413, and a protrusion 411 protrudes from the first face portion 412; the surface of the second stop portion 42 facing the first stop portion 41 includes a third face portion 422 and a fourth face portion 423, and a protrusion 421 protrudes from the fourth face portion 423; the protruding end face of the protruding portion 411 contacts the third face portion 422, and the protruding end face of the protruding portion 421 contacts the second face portion 413.

[0093] Optionally, when a plurality of protrusions 411 are provided on the surface of the first stop portion 41 facing the second stop portion 42, the plurality of protrusions 411 are all provided on the first face portion 412.

[0094] Optionally, when a plurality of protrusions 421 are provided on the surface of the second stop portion 42 facing the first stop portion 41, the plurality of protrusions 421 are all provided on the fourth face portion 423.

[0095] Optionally, the protruding end face of the protrusion 411 is in fixed contact with the third face 422, and the protruding end face of the protrusion 421 is in fixed contact with the second face 413.

[0096] Optionally, the protruding end face of the protrusion 411 is welded to the third face 422; the protruding end face of the protrusion 421 is welded to the second face 413.

[0097] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0098] In the plate heat exchanger provided by the present invention, the flow-changing baffle 40 includes a first stop portion 41 and a second stop portion 42 distributed axially along the first manifold 31; the flow-changing baffle 40 also includes a support structure disposed between the first stop portion 41 and the second stop portion 42, so that the support structure is supported between the first stop portion 41 and the second stop portion 42. Providing a support structure can increase the overall structural strength of the flow-changing baffle 40, giving the flow-changing baffle 40 strong impact resistance, thereby meeting high pressure resistance requirements.

[0099] A receiving space 43 is formed between the first stop 41, the second stop 42, and the supporting structure, or the supporting structure is provided with a receiving space 43.

[0100] For the flow-changing baffle 40 in the first manifold 31, the receiving space 43 is connected to a second heat exchange channel 22, so that the second heat exchange medium flows into the receiving space 43, and the second heat exchange medium in the receiving space 43 exchanges heat with the first heat exchange medium on both sides of the flow-changing baffle 40. That is, heat exchange between the two heat exchange media can also occur at the flow-changing baffle 40. In this way, the heat exchange area of ​​the two heat exchange media is increased, thereby increasing the heat exchange capacity and improving the heat exchange performance.

[0101] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0102] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A plate heat exchanger, comprising a flow baffle and a plurality of heat exchange plates (10) stacked sequentially, wherein a heat exchange channel (20) is formed between two adjacent heat exchange plates (10); the plurality of heat exchange channels (20) include alternating first heat exchange channel (21) and second heat exchange channel (22); The through holes on the multiple heat exchange plates (10) are connected in sequence to form a channel for the heat exchange medium to flow in or out; the plate heat exchanger includes a first manifold (31), a second manifold (32), a third manifold (33), and a fourth manifold (34); The first heat exchange channel (21) is connected to the first manifold (31) and the second manifold (32) to form a first flow channel for the flow of the first heat exchange medium; the second heat exchange channel (22) is connected to the third manifold (33) and the fourth manifold (34) to form a second flow channel for the flow of the second heat exchange medium. The first heat exchange medium and the second heat exchange medium exchange heat through the plate heat exchanger; The first manifold (31) is provided with the flow-changing baffle, which divides the first manifold (31) into a first pipe section (311) and a second pipe section (312) in its axial direction; Its features are, The converter baffle includes: A first stop portion (41) and a second stop portion (42) are distributed at intervals along the axial direction of the first manifold (31); A support structure is provided and supported between the first stop (41) and the second stop (42); Wherein, a receiving space (43) is formed between the first stop (41), the second stop (42), and the support structure, or, the support structure is provided with a receiving space (43); The receiving space (43) of the flow-changing baffle in the first manifold (31) is connected to a second heat exchange channel (22) so that the second heat exchange medium flows into the receiving space (43) of the flow-changing baffle in the first manifold (31).

2. The plate heat exchanger according to claim 1, characterized in that, The support structure is a support portion (431) filled between the first stop portion (41) and the second stop portion (42), and the accommodating space (43) is disposed on the support portion (431).

3. The plate heat exchanger according to claim 1, characterized in that, The first stop (41) has a protruding portion (411) on its surface facing the second stop (42), and the protruding end face of the protruding portion (411) contacts the second stop (42); the protruding portion (411) is used to form the support structure; the space between the first stop (41) and the second stop (42) forms the receiving space (43); and / or The second stop (42) has a protruding part (421) on its surface facing the first stop (41), and the protruding end face of the protruding part (421) contacts the first stop (41); the protruding part (421) is used to form the support structure; the space between the first stop (41) and the second stop (42) forms the receiving space (43).

4. The plate heat exchanger according to claim 3, characterized in that, The first stop (41) has a plurality of protrusions (411) spaced apart on its surface facing the second stop (42); and / or The second stop (42) has a plurality of protrusions (421) spaced apart on its surface facing the first stop (41).

5. The plate heat exchanger according to claim 3, characterized in that, When a protrusion (411) is provided on the surface of the first stop (41) facing the second stop (42), and a protrusion (421) is provided on the surface of the second stop (42) facing the first stop (41), the protrusion (411) and the protrusion (421) are arranged opposite to each other so that the protruding end face of the protrusion (411) and the protruding end face of the protrusion (421) are in contact.

6. The plate heat exchanger according to claim 3, characterized in that, The surface of the first stop (41) facing the second stop (42) includes a first face (412) and a second face (413), and the protrusion (411) protrudes from the first face (412); the surface of the second stop (42) facing the first stop (41) includes a third face (422) and a fourth face (423), and the protrusion (421) protrudes from the fourth face (423); the protruding end face of the protrusion (411) contacts the third face (422), and the protruding end face of the protrusion (421) contacts the second face (413).

7. The plate heat exchanger according to claim 3, characterized in that, The first stop (41) is a plate-shaped structure. A portion of the plate of the first stop (41) protrudes towards the second stop (42), such that the protruding portion of the plate of the first stop (41) forms the protrusion (411); or A portion of the plate of the first stop (41) protrudes in a direction away from the second stop (42) so that the non-protruding portion of the plate of the first stop (41) forms the protrusion (411).

8. The plate heat exchanger according to claim 3, characterized in that, The second stop (42) is a plate-like structure. A portion of the plate of the second stop (42) protrudes toward the first stop (41) such that the protruding portion of the plate of the second stop (42) forms the protrusion (421); or A portion of the plate of the second stop (42) protrudes in a direction away from the first stop (41) so that the non-protruding portion of the plate of the second stop (42) forms the protrusion (421).

9. The plate heat exchanger according to claim 1, characterized in that, The two heat exchange plates (10) of the second heat exchange channel (22) which are connected to the receiving space (43) of the flow baffle in the first manifold (31) are the first heat exchange plate and the second heat exchange plate, respectively. The first stop part (41) and the second stop part (42) of the flow baffle in the first manifold (31) are respectively connected and fixed to the first heat exchange plate and the second heat exchange plate.

10. The plate heat exchanger according to claim 9, characterized in that, The first stop (41) and the first heat exchange plate are integrally formed; and / or The second stop (42) and the second heat exchange plate are integrally formed.

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