Plate heat exchanger

Abstract

The invention relates to the technical field of heat exchange, in particular to a plate heat exchanger, in the width direction of a first plate, the circulation area of one side, away from a flow guide part, of a first hole is larger than that of one side, close to the flow guide part, of the first hole; or in the width direction of the first plate, the first hole is located in the corresponding position of the side, away from the flow guide part, of the first opening, so that when the fluid flows into the first heat exchange space through the first hole, the fluid flows into the first heat exchange space in a non-uniform distribution mode; the heat exchange area utilization of the plate heat exchanger is improved, heat exchange is more uniform, and the heat exchange efficiency is improved.

Description

[Technical field]

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

[0002] A plate heat exchanger, reference Fig.11 The plate heat exchanger includes a first plate 1', the plate heat exchanger includes a first port 11' and a second port 12' located on the first plate, and also includes a heat exchange space 100' corresponding to the first plate, the first plate includes a guide portion 13', the extension direction of the guide portion is defined as the length direction of the guide portion, and the extension direction perpendicular to the guide portion is defined as the width direction of the guide portion; the heat exchange space includes a first part 101' and a second part 102', along the width direction of the guide portion, the first part and the second part are respectively located on both sides of the guide portion, the fluid needs to bypass the guide portion along the length direction of the guide portion, enter the other from one of the first part and the second part, and flow out of the heat exchange space from one of the first port or the second port.

[0003] In the width direction of the guide part, the fluid flows close to or close to the guide part, or the fluid has a tendency to flow close to / close to the guide part. In the width direction of the guide part, there is less fluid away from both sides of the guide part, and the heat exchange efficiency is reduced. [Summary of the invention]

[0004] The present invention provides a plate heat exchanger that solves the above problems:

[0005] A plate heat exchanger, the plate heat exchanger includes a first plate and a second plate, the first plate includes a first main body, the second plate includes a second main body, the plate heat exchanger includes a first heat exchange space located between the first main body and the second main body, the plate heat exchanger includes a first hole, the plate heat exchanger includes a guide part, the first plate includes a first port located in the first main body and a second port located in the first main body, the first port and the second port are respectively located on both sides of the guide part, and the guide part protrudes from one of the first main body and the second main body toward the other; the first hole connects the flow channel corresponding to the first port with the first heat exchange space; along the width direction of the first plate, the flow area of ​​the first hole on the side away from the guide part is greater than the flow area of ​​the first hole on the side close to the guide part; or along the width direction of the first plate, the first hole is located at a corresponding position on the side of the first port away from the guide part.

[0006] In such a plate heat exchanger, along the width direction of the first plate, the flow area of ​​the first hole on the side away from the guide portion is larger than the flow area of ​​the first hole on the side close to the guide portion; or along the width direction of the first plate, the first hole is located at the corresponding position on the side of the first port away from the guide portion, so that when the fluid flows into the first heat exchange space through the first hole, the fluid is unevenly distributed and flows into the first heat exchange space. Compared with the background technology, the fluid flows along the guide portion when entering the first heat exchange space from the first hole, thereby improving the heat exchange area utilization rate of the plate heat exchanger, making the heat exchange more uniform, and improving the heat exchange efficiency.

Brief Description of the Drawings

[0007] Figure 1 A partial cross-sectional view of an embodiment;

[0008] Figure 2 This is an enlarged view of area B of an embodiment of the peripheral wall portion;

[0009] Figure 3 A schematic diagram of a peripheral wall portion of an embodiment;

[0010] Figure 4 It is an enlarged view of another embodiment B of the peripheral wall portion;

[0011] Figure 5 A schematic diagram of a peripheral wall portion of another embodiment;

[0012] Figure 6 A magnified view of area B of another embodiment of the peripheral wall portion;

[0013] Figure 7 A schematic diagram of a peripheral wall portion of another embodiment;

[0014] Figure 8 This is an enlarged view of region A of an embodiment;

[0015] Fig. 9 A partial cross-sectional view of another embodiment;

[0016] Fig.10 A schematic diagram of a first plate in an embodiment;

[0017] Fig.11 Background Art Cross-sectional view.

[0018] Reference numerals:

[0019] A first plate 1, a first main body 11, a first opening 12, a second opening 13; a first recessed portion 14; and a first flange 15;

[0020] The second plate 2, the second main body 21, the guide portion 22, the second recessed portion 23; the third opening 24; the second flange 25;

[0021] The third plate 3; the first protrusion 31; the first limit portion 32; the fourth opening 33; the third flange 34;

[0022] The peripheral wall portion 4; the first portion 41; the second limiting portion 42, the second portion 43; the third portion 44; the reference portion 45, the extension portion 46;

[0023] First pipe part 5;

[0024] The first hole 001 ; the first heat exchange space 100 ; and the second heat exchange space 200 .

[0025] A first plate 1', a first port 11', a second port 12', a flow guide 13', a heat exchange space 100', a first part 101', and a second part 102'. [Specific implementation method]

[0026] The technical solution of the specific implementation is described below in conjunction with the accompanying drawings:

[0027] A plate heat exchanger, the plate heat exchanger includes a first plate 1 and a second plate 2, the first plate 1 includes a first main body 11, the second plate 2 includes a second main body 21, the plate heat exchanger includes a first heat exchange space 100 located between the first main body 11 and the second main body 21, the plate heat exchanger includes a first hole 001, the plate heat exchanger includes a guide portion 22, the first plate 1 includes a first port 12 located in the first main body 11 and a second port 13 located in the first main body 11, the first port 12 and the second port 13 are respectively The first and second main bodies 11 and 21 are respectively located on both sides of the guide portion 22, and the guide portion 22 protrudes from one of the first main body portion 11 and the second main body portion 21 toward the other; the first hole 001 connects the flow channel corresponding to the first port 12 with the first heat exchange space 100; along the width direction of the first plate 1, the flow area of ​​the first hole 001 on the side away from the guide portion 22 is greater than the flow area of ​​the first hole 001 on the side close to the guide portion 22; or along the width direction of the first plate 1, the first hole 001 is located at a corresponding position on the side of the first port 12 away from the guide portion 22.

[0028] In such a plate heat exchanger, along the width direction of the first plate 1, the flow area of ​​the first hole 001 on the side away from the guide portion 22 is greater than the flow area of ​​the first hole 001 on the side close to the guide portion 22; or along the width direction of the first plate 1, the first hole 001 is located at the corresponding position on the side of the first port 12 away from the guide portion 22, so that when the fluid flows into the first heat exchange space 100 through the first hole 001, the fluid is unevenly distributed and flows into the first heat exchange space 100. Compared with the background technology, when the fluid enters the first heat exchange space 100 from the first hole 001, it flows along the guide portion 22, thereby improving the heat exchange area utilization of the plate heat exchanger, making the heat exchange more uniform, and improving the heat exchange efficiency.

[0029] It should be noted that:

[0030] The width direction of the first plate 1 is the distribution direction of the inlet and outlet of the same fluid in the same plate; the shape of the first plate 1 corresponding to the first main body 11 can be rectangular or irregular;

[0031] A line segment is drawn along the plane corresponding to the first main body portion 11, which is perpendicular to the width direction of the first plate 1 and intersects with the cross section corresponding to the first opening 12 / first hole 001. The portion on the same side of the line segment as the guide portion 22 can be understood as the corresponding position of the first opening 12 / first hole 001 close to the guide portion 22, and the portions on both sides of the line segment as the guide portion 22 can be understood as the corresponding positions of the first opening 12 / first hole 001 away from the guide portion 22.

[0032] In one embodiment, reference Figure 1-Figure 3 and Fig.10 The plate heat exchanger includes a first plate 1 and a second plate 2, the first plate 1 includes a first main body 11, the second plate 2 includes a second main body 21, the plate heat exchanger includes a first heat exchange space 100 located between the first main body 11 and the second main body 21, the first plate 1 and the second plate 2 are stacked, the first plate 1 includes a guide portion 22, the guide portion 22 protrudes from the first main body 11 toward the second main body 21, the first plate 1 includes a first port 12 located in the first main body 11 and a second port 13 located in the first main body 11, the first port 12 and the second port 13 are respectively located on both sides of the guide portion 22, and the plate heat exchanger includes a first hole 001, and the first hole 001 connects the first port 12 and the first heat exchange space 100.

[0033] Specifically, along the width direction of the first plate 1, the first hole 001 is located at a corresponding position on a side of the first port 12 away from the guide portion 22. The plate heat exchanger includes a peripheral wall portion 4, at least a portion of the peripheral wall portion 4 is located in a flow channel corresponding to the first port 12, along the width direction of the first plate 1, at least a portion of the peripheral wall portion 4 is located at a corresponding position on a side of the first port 12 close to the guide portion 22, along the plate stacking direction or the reverse direction, one end of the peripheral wall portion 4 is in contact with the first plate 1, and the other end of the peripheral wall portion 4 is in contact with the second plate 2.

[0034] Such a plate heat exchanger has at least part of the peripheral wall portion 4 located at a corresponding position on one side of the first port 12 close to the guide portion 22. Along the stacking direction or the reverse direction of the plates, one end of the peripheral wall portion 4 contacts the first plate 1, and the other end of the peripheral wall portion 4 contacts the second plate 2. That is, the fluid is at least partially obstructed by the peripheral wall portion 4 in the process of entering the first heat exchange space 100 from the first port 12. Compared with the background technology, the fluid flows along the guide portion 22 when entering the first heat exchange space 100 from the first hole 001, thereby improving the utilization rate of the heat exchange area of ​​the plate heat exchanger, making the heat exchange more uniform, and improving the heat exchange efficiency.

[0035] More specifically, the first main body portion 11 includes a first recessed portion 14 recessed along the stacking direction of the plates or in the opposite direction, the peripheral wall portion 4 includes a second portion 43, the second portion 43 is located in the flow channel corresponding to the first port 12, specifically, the second main body portion 21 includes a third port 24 corresponding to the first port 12, the second portion 43 is penetrated through the third port 24 and extends toward the first port 12; the peripheral wall portion 4 includes a third portion 44 bent with the second portion 43, the third portion 44 is located in the first recessed portion 14, and contacts the wall portion corresponding to the first recessed portion 14, specifically, the third portion 44 is welded and fixed to the wall portion corresponding to the first recessed portion 14, so that the third portion 44 is in surface contact with the wall portion corresponding to the first recessed portion 14, the welding area is larger, and the welding is more firm.

[0036] In one embodiment, reference Figure 1 , Figure 4 , Figure 5 and Fig.10 The plate heat exchanger includes a first plate 1 and a second plate 2, the first plate 1 includes a first main body 11, the second plate 2 includes a second main body 21, the plate heat exchanger includes a first heat exchange space 100 located between the first main body 11 and the second main body 21, the first plate 1 and the second plate 2 are stacked, the first plate 1 includes a guide portion 22, the guide portion 22 protrudes from the first main body 11 toward the second main body 21, the first plate 1 includes a first port 12 located in the first main body 11 and a second port 13 located in the first main body 11, the first port 12 and the second port 13 are respectively located on both sides of the guide portion 22, and the plate heat exchanger includes a first hole 001, and the first hole 001 connects the first port 12 and the first heat exchange space 100.

[0037] Specifically, along the width direction of the first plate 1, the flow area of ​​the first hole 001 on the side away from the guide portion 22 is greater than the flow area of ​​the first hole 001 on the side close to the guide portion 22; the plate heat exchanger includes a peripheral wall portion 4, the peripheral wall portion 4 is at least partially annular, at least partially located in the flow channel corresponding to the first port 12, along the plate stacking direction or the reverse direction, one end of the peripheral wall portion 4 is in contact with the second plate 2, the first hole 001 is located between the wall portion corresponding to the first port 12 and the other end of the peripheral wall portion 4, the other end of the peripheral wall portion 4 includes a reference portion 45 and an extension portion 46, the reference portion 45 is located at a corresponding position on the side of the peripheral wall portion 4 away from the guide portion 22, the extension portion 46 is located at a corresponding position on the side of the peripheral wall portion 4 close to the guide portion 22, and the distance from the reference portion 45 to the wall portion corresponding to the first hole 001 is greater than the distance from the extension portion 46 to the wall portion corresponding to the first hole 001.

[0038] Such a plate heat exchanger includes a reference portion 45 and an extension portion 46 through the other end of the peripheral wall portion 4, the reference portion 45 is located at a corresponding position on the side of the peripheral wall portion 4 away from the guide portion 22, and the extension portion 46 is located at a corresponding position on the side of the peripheral wall portion 4 close to the guide portion 22. The distance from the reference portion 45 to the corresponding wall portion of the first hole 001 is greater than the distance from the extension portion 46 to the corresponding wall portion of the first hole 001, so that along the width direction of the first plate 1, the flow area on the side of the first hole 001 away from the guide portion 22 is greater than the flow area on the side of the first hole 001 close to the guide portion 22, thereby achieving uneven distribution of the fluid into the first heat exchange space 100 during the process of the fluid entering the first heat exchange space 100 from the first port 12. Compared with the background technology, when the fluid enters the first heat exchange space 100 from the first hole 001, it flows along the guide portion 22, thereby improving the heat exchange area utilization rate of the plate heat exchanger, making the heat exchange more uniform, and improving the heat exchange efficiency.

[0039] In one embodiment, reference Figure 1 , Figure 6 , Figure 7 and Fig.10 The plate heat exchanger includes a first plate 1 and a second plate 2, the first plate 1 includes a first main body 11, the second plate 2 includes a second main body 21, the plate heat exchanger includes a first heat exchange space 100 located between the first main body 11 and the second main body 21, the first plate 1 and the second plate 2 are stacked, the first plate 1 includes a guide portion 22, the guide portion 22 protrudes from the first main body 11 toward the second main body 21, the first plate 1 includes a first port 12 located in the first main body 11 and a second port 13 located in the first main body 11, the first port 12 and the second port 13 are respectively located on both sides of the guide portion 22, and the plate heat exchanger includes a first hole 001, and the first hole 001 connects the first port 12 and the first heat exchange space 100.

[0040] Along the width direction of the first plate 1, the flow area of ​​the first hole 001 on the side away from the guide portion 22 is greater than the flow area of ​​the first hole 001 on the side close to the guide portion 22. The plate heat exchanger includes a peripheral wall portion 4, at least part of which is located in the flow channel corresponding to the first port 12. Along the plate stacking direction or the reverse direction, one of the first plate 1 and the second plate 2 is in contact with one end of the peripheral wall portion 4, and at least part of the first hole 001 is located between the other of the first plate 1 and the second plate 2 and the other end of the peripheral wall portion 4. Along the width direction of the first plate 1, at least part of the first hole 001 is located at a corresponding position on the side of the first port 12 away from the guide portion 22. In this way, In the process of the fluid flowing from the first port 12 into the first heat exchange space 100, it is not only obstructed by the surrounding wall portion 4 along the width direction of the first plate 1, but also along the width direction of the first plate 1, the flow area of ​​the first hole 001 on the side away from the guide portion 22 is larger than the flow area of ​​the first hole 001 on the side close to the guide portion 22, thereby achieving that in the process of the fluid entering the first heat exchange space 100 from the first port 12, the fluid is unevenly distributed and flows into the first heat exchange space 100. Compared with the background technology, when the fluid enters the first heat exchange space 100 from the first hole 001, it flows along the guide portion 22, thereby improving the heat exchange area utilization rate of the plate heat exchanger, making the heat exchange more uniform, and improving the heat exchange efficiency.

[0041] In one embodiment, reference Figure 1 , Figure 3 , Figure 5 , Figure 7 and Figure 8 The plate heat exchanger includes a third plate 3, the third plate 3 and the first plate 1 are respectively located on both sides of the second plate 2, the second plate 2 has a third port 24 corresponding to the first port 12, and the third plate 3 has a fourth port 33 corresponding to the first port 12 and the third port 24. The peripheral wall portion 4 includes a first portion 41 and a second portion 43, the second portion 43 is penetrated through the third port 24 and is located in the flow channel corresponding to the first port 12, the first portion 41 and the second portion 43 are bent, the first portion 41 is annular, and the inner hole of the annular portion corresponds to the first port 12 and the third port 24, the third plate 3 includes a first protrusion 31 protruding along the concave direction of the first concave portion 14, the first portion 41 is located between the first protrusion 31 and the second plate 2, and contacts the first protrusion 31 and the second plate 2 respectively, specifically, the first portion 41 is welded and fixed to the first protrusion 31 and the second plate 2, so that the contact area between the peripheral wall portion 4 and the first protrusion 31 and the second plate 2 is increased, and the welding is more firm.

[0042] Specifically, one of the third plate 3 and the second plate 2 has a first limiting portion 32, and more specifically, the second plate 2 has a first limiting portion 32; the first portion 41 has a second limiting portion 42 that matches the first limiting portion 32. More specifically, the second limiting portion 42 is a convex hull, and the shape of the second limiting portion 42 matches the first limiting portion 32, ensuring the circumferential limitation of the third opening 24 of the peripheral wall portion 4, and ensuring the relative positions of the peripheral wall portion 4 and the first plate 1, the second plate 2, and the third plate 3 during the installation process.

[0043] More specifically, the second main body 21 includes a second recessed portion 23, the second recessed portion 23 is adapted to the shape of the first portion 41, and the first portion 41 is located in the second recessed portion 23. In this way, the circumferential limit of the third opening 24 of the peripheral wall portion 4 is ensured, and the relative positions of the peripheral wall portion 4 and the first plate 1, the second plate 2, and the third plate 3 during the installation process are ensured.

[0044] In one embodiment, reference Fig. 9 The plate heat exchanger includes a first plate 1 and a second plate 2, the first plate 1 includes a first main body 11, the second plate 2 includes a second main body 21, the plate heat exchanger includes a first heat exchange space 100 located between the first main body 11 and the second main body 21, the first plate 1 and the second plate 2 are stacked, the first plate 1 includes a guide portion 22, the guide portion 22 protrudes from the first main body 11 toward the second main body 21, the first plate 1 includes a first port 12 located in the first main body 11 and a second port 13 located in the first main body 11, the first port 12 and the second port 13 are respectively located on both sides of the guide portion 22, the plate heat exchanger includes a first hole 001, the first hole 001 connects the flow channel corresponding to the first port 12 and the first heat exchange space 100, specifically, the flow channel corresponding to the first port 12 is the cavity corresponding to the first pipe portion 5.

[0045] The second plate 2 includes a third port 24 corresponding to the first port 12, and the plate heat exchanger includes a first pipe portion 5, at least a portion of the first pipe portion 5 passes through the first port 12 and the third port 24, and contacts the wall portions corresponding to the first port 12 and the third port 24, and the first hole 001 is located on the wall portion corresponding to the first pipe portion 5, and along the width direction of the first plate 1, the first hole 001 is located on the side of the first pipe portion 5 away from the guide portion 22, or the first hole 001 includes a plurality of holes, and the first holes 001 are arranged more densely on the side of the first pipe portion 5 away from the guide portion 22 than on the side of the first pipe portion 5 close to the guide portion 22.

[0046] Such a plate heat exchanger has the first hole 001 located on the side of the first tube part 5 away from the guide part 22, or the first holes 001 include a plurality of holes, and the first holes 001 are arranged more densely on the side of the first tube part 5 away from the guide part 22 than on the side of the first tube part 5 close to the guide part 22, so that when the fluid flows into the first heat exchange space 100 through the first hole 001, the fluid is unevenly distributed and flows into the first heat exchange space 100. Compared with the background technology, when the fluid enters the first heat exchange space 100 from the first hole 001, it flows along the guide part 22, thereby improving the heat exchange area utilization of the plate heat exchanger, making the heat exchange more uniform, and improving the heat exchange efficiency.

[0047] Specifically, the plate heat exchanger also includes a third plate 3, the first plate 1, the second plate 2 and the third plate 3 are stacked, the plate heat exchanger includes a second heat exchange space 200, the second heat exchange space 200 is located between the second plate 2 and the third plate 3, the third plate 3 has a fourth port 33 corresponding to the first port 12 and the third port 24, at least part of the first pipe portion 5 is penetrated by the first port 12, the third port 24 and the fourth port 33, and respectively contacts the wall portions corresponding to the first port 12, the third port 24 and the fourth port 33, and blocks the first heat exchange space 100 from being connected to the second heat exchange space 200. As such, at least a portion of the first tube portion 5 is passed through the first port 12, the third port 24 and the fourth port 33, and respectively contacts the wall portions corresponding to the first port 12, the third port 24 and the fourth port 33. By passing at least a portion of the first tube portion 5 through the first port 12, the third port 24 and the fourth port 33, and respectively contacts the wall portions corresponding to the first port 12, the third port 24 and the fourth port 33, specifically, at least a portion of the first tube portion 5 is passed through the first port 12, the third port 24 and the fourth port 33, and respectively welded and fixed to the wall portions corresponding to the first port 12, the third port 24 and the fourth port 33, sealing of both sides of the second plate 2 is achieved. Compared with the solution of stamping a boss on the plate, the structure of the plate in this embodiment is simpler.

[0048] More specifically, the first plate, the second plate and the third plate 3 respectively have a first flange 15, a second flange 25 and a third flange 34 corresponding to the first opening, the third opening and the fourth opening 33, and at least a portion of the first tube portion 5 is passed through the first opening 12, the third opening 24 and the fourth opening 33, and are respectively welded and fixed to the first flange 15, the second flange 25 and the third flange 34, thereby increasing the welding area of ​​the first plate 1, the second plate 2, the third plate 3 and the first tube portion 5, and making the welding more firm.

[0049] In the above embodiment, the structures of the first plate 1, the second plate 2 and the third plate 3 can be the same, and the second plate 2 and the third plate 3 can be stacked and installed by rotating the first plate 1 by a certain angle, wherein the rotation by a certain angle includes 360° and angles that are integer multiples of 360°, thereby ensuring the versatility of the structure.

[0050] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A plate heat exchanger, comprising a first plate (1) and a second plate (2), wherein the first plate (1) comprises a first main body (11), and the second plate (2) comprises a second main body (21), and the plate heat exchanger comprises a first heat exchange space (100) located between the first main body (11) and the second main body (21), characterized in that: The plate heat exchanger comprises a first hole (001), the plate heat exchanger comprises a flow guide portion (22), the first plate (1) comprises a first port (12) located on the first main body portion (11) and a second port (13) located on the first main body portion (11), the first port (12) and the second port (13) are respectively located on both sides of the flow guide portion (22), and the flow guide portion (22) protrudes from one of the first main body portion (11) and the second main body portion (21) toward the other; the first hole (001) connects a flow channel corresponding to the first port (12) with the first heat exchange space (100); along the width direction of the first plate (1), a flow area on a side of the first hole (001) away from the flow guide portion (22) is greater than a flow area on a side of the first hole (001) close to the flow guide portion (22); or along the width direction of the first plate (1), the first hole (001) is located at a corresponding position on a side of the first port (12) away from the flow guide portion (22).

2. The plate heat exchanger according to claim 1, characterized in that: Along the width direction of the first plate (1), the first hole (001) is located at a corresponding position on a side of the first port (12) away from the guide portion (22); the plate heat exchanger comprises a peripheral wall portion (4); at least a portion of the peripheral wall portion (4) is located at a flow channel corresponding to the first port (12); along the width direction of the first plate (1), at least a portion of the peripheral wall portion (4) is located at a corresponding position on a side of the first port (12) close to the guide portion (22); along the plate stacking direction or the reverse direction, one end of the peripheral wall portion (4) is in contact with the first plate (1), and the other end of the peripheral wall portion (4) is in contact with the second plate (2).

3. The plate heat exchanger according to claim 2, characterized in that: The first main body portion (11) includes a first recessed portion (14) recessed along the plate stacking direction or the reverse direction, the peripheral wall portion (4) includes a second portion (43), the second portion (43) is located in the flow channel corresponding to the first port (12), and the peripheral wall portion (4) includes a third portion (44) bent with the second portion (43), the third portion (44) is located in the first recessed portion (14), and contacts with the wall portion corresponding to the first recessed portion (14).

4. The plate heat exchanger according to claim 1, characterized in that: Along the width direction of the first plate (1), the flow area of ​​the first hole (001) on the side away from the guide portion (22) is larger than the flow area of ​​the first hole (001) on the side close to the guide portion (22); the plate heat exchanger comprises a peripheral wall portion (4), at least part of the peripheral wall portion (4) is annular, at least part of the peripheral wall portion (4) is located in the flow channel corresponding to the first port (12), along the plate stacking direction or the reverse direction, one end of the peripheral wall portion (4) is in contact with the second plate (2), and the first hole (001) is located in the second plate (2). A hole (12) is provided between a wall portion corresponding to the first hole (12) and the other end portion of the peripheral wall portion (4), the other end portion of the peripheral wall portion (4) comprising a reference portion (45) and an extension portion (46), the reference portion (45) being located at a corresponding position on a side of the peripheral wall portion (4) away from the flow guide portion (22), the extension portion (46) being located at a corresponding position on a side of the peripheral wall portion (4) close to the flow guide portion (22), the distance from the reference portion (45) to the wall portion corresponding to the first hole (001) being greater than the distance from the extension portion (46) to the wall portion corresponding to the first hole (001).

5. The plate heat exchanger according to claim 1, characterized in that: Along the width direction of the first plate (1), the flow area of ​​the first hole (001) on the side away from the guide portion (22) is greater than the flow area of ​​the first hole (001) on the side close to the guide portion (22); the plate heat exchanger comprises a peripheral wall portion (4); at least a portion of the peripheral wall portion (4) is located in a flow channel corresponding to the first port (12); along the plate stacking direction or the reverse direction, one of the first plate (1) and the second plate (2) is in contact with an end of the peripheral wall portion (4); at least a portion of the first hole (001) is located between the other of the first plate (1) and the second plate (2) and the other end of the peripheral wall portion (4); and along the width direction of the first plate (1), at least a portion of the first hole (001) is located at a corresponding position on the side of the first port (12) away from the guide portion (22).

6. The plate heat exchanger according to any one of claims 2 to 5, characterized in that: The plate heat exchanger comprises a third plate (3), wherein the third plate (3) and the first plate (1) are respectively located on both sides of the second plate (2), the peripheral wall portion (4) comprises a first portion (41) and a second portion (43), wherein the second portion (43) is located in a flow channel corresponding to the first port (12), and the first portion (41) and the second portion (43) are bent and arranged, and the third plate (3) comprises a first protrusion (31) protruding along a concave direction of the first concave portion (14), and the first portion (41) is located between the first protrusion (31) and the second plate (2), and is in contact with the first protrusion (31) and the second plate (2) respectively.

7. The plate heat exchanger according to claim 6, characterized in that: One of the third plate (3) and the second plate (2) has a first limiting portion (32), and the first portion (41) has a second limiting portion (42) matched with the first limiting portion (32).

8. The plate heat exchanger according to claim 7, characterized in that: The second main body (21) comprises a second recessed portion (23), the second recessed portion (23) is adapted to the shape of the first portion (41), and the first portion (41) is located in the second recessed portion (23).

9. The plate heat exchanger according to claim 1, characterized in that: The second plate (2) comprises a third port (24) corresponding to the first port (12); the plate heat exchanger comprises a first pipe portion (5); at least a portion of the first pipe portion (5) passes through the first port (12) and the third port (24) and contacts with the wall portions corresponding to the first port (12) and the third port (24); the first hole (001) is located at the wall portion corresponding to the first pipe portion (5); the flow channel corresponding to the first port (12) is the cavity corresponding to the first pipe portion (5); along the width direction of the first plate (1), the first hole (001) is located at a side of the first pipe portion (5) away from the guide portion (22); or the first holes (001) include a plurality of holes, and the first holes (001) are arranged more densely on the side of the first pipe portion (5) away from the guide portion (22) than on the side of the first pipe portion (5) close to the guide portion (22).

10. The plate heat exchanger according to claim 9, characterized in that: The plate heat exchanger further comprises a third plate (3), wherein the first plate (1), the second plate (2) and the third plate (3) are stacked and arranged, and the plate heat exchanger comprises a second heat exchange space (200), wherein the second heat exchange space (200) is located between the second plate (2) and the third plate (3), and the third plate (3) has a fourth port (33) corresponding to the first port (12) and the third port (24), and at least part of the first pipe portion (5) is passed through the first port (12), the third port (24) and the fourth port (33), and is in contact with the wall portions corresponding to the first port (12), the third port (24) and the fourth port (33), respectively, and blocks the first heat exchange space (100) from being connected with the second heat exchange space (200).

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