Plate heat exchange device

Abstract

The present application provides a plate heat exchange device, comprising a main body portion, a connecting tube, an opening portion, and a flow channel portion. The opening portion comprises a first port and a wall corresponding to the first port; walls corresponding to a distribution flow channel comprise a side wall, a bottom wall, and a top wall; the top wall is close to the first port with respect to the bottom wall; a plane perpendicular to the stacking direction of a plurality of plates is defined as a projection plane; the orthographic projection of the opening portion on the projection plane is a first projection, and the orthographic projection of the flow channel portion on the projection plane is a second projection; and the first projection and the second projection are arranged eccentrically. A fluid enters the distribution flow channel from the first port, impacts the bottom wall of the distribution flow channel, then rebounds toward the top wall and merges with the fluid at the first port to form a recirculating flow, thereby improving the uniformity of fluid distribution.

Description

Plate heat exchanger Technical Field

[0001] This application relates to the field of heat exchange technology, and in particular to a plate heat exchanger for use in automotive refrigeration. Background Technology

[0002] Plate heat exchangers consist of multiple plates stacked to form multiple inter-plate flow channels. Fluids at different temperatures flow from the outside of the plate heat exchanger into different inter-plate flow channels, exchanging heat with adjacent fluids of different temperatures through the plates. However, related plate heat exchangers suffer from uneven fluid distribution. Summary of the Invention

[0003] Therefore, this application provides a plate heat exchanger, which includes a main body comprising a plurality of plates stacked along the height direction of the plate heat exchanger. The main body has a distribution channel, a first inter-plate channel, and at least two second inter-plate channels, all of which are connected to the distribution channel. The distribution channel and the second inter-plate channels are fluidly isolated from the first inter-plate channel. The plate heat exchanger includes a connecting pipe connected to the main body, having a first port and a second port. Along the stacking direction of the plurality of plates, the first port is closer to the distribution channel than the second port. The distribution channel is surrounded by a wall. The plate heat exchanger includes a side wall, a bottom wall, and a top wall. The top wall is closer to the first opening than the bottom wall. Along the stacking direction of the plurality of plates, the bottom wall and the connecting pipe are located on both sides of the distribution channel, and the side wall is located on the periphery of the distribution channel. The plate heat exchanger has an opening and a flow channel. The opening includes the first opening and the wall corresponding to the first opening. The top wall is part of the wall corresponding to the first opening. The flow channel includes the distribution flow channel and the side wall. A plane perpendicular to the stacking direction of the plurality of plates is defined as a projection plane. The orthographic projection of the opening onto the projection plane is the first projection, and the orthographic projection of the flow channel onto the projection plane is the second projection. The first projection and the second projection are eccentrically positioned.

[0004] The fluid enters the distribution channel from the first inlet. Since the first distance is set smaller than the second distance, the fluid bounces back to the wall corresponding to the first inlet after hitting the bottom wall of the distribution channel, and merges with the fluid coming out of the first inlet to form a flow around it, which improves the uniformity of fluid distribution. Attached Figure Description

[0005] Figure 1 is a partial cross-sectional schematic diagram of a heat exchange device provided in one embodiment of this application;

[0006] Figure 2 is a partial cross-sectional schematic diagram of a heat exchange device provided in another embodiment of this application;

[0007] Figure 3 is an exploded schematic diagram of a heat exchange device provided in one embodiment of this application;

[0008] Figure 4 is a partial cross-sectional schematic diagram of a heat exchange device provided in another embodiment of this application;

[0009] Figure 5 is an exploded schematic diagram of a heat exchange device provided in another embodiment of this application;

[0010] Figure 6 is a schematic diagram of the connecting pipe of this application;

[0011] Figure 7 is a schematic diagram of the first projection and the second projection of one embodiment of this application;

[0012] Figure 8 is a schematic diagram of the second and third projections according to one embodiment of this application;

[0013] Figure 9 is a schematic cross-sectional view of the heat exchange device shown in Figure 2 from another angle. Detailed Implementation

[0014] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0015] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0016] It should be understood that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one; "multiple" indicates two or more. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects.

[0017] The plate heat exchanger of exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can complement or combine with each other.

[0018] The plate heat exchanger 100 includes multiple plates 21, which are stacked to form multiple inter-plate flow channels. Specifically, the multiple inter-plate flow channels include a first inter-plate flow channel 222 and at least two second inter-plate flow channels 223. Fluids of different temperatures flow from outside the plate heat exchanger 100 into the first inter-plate flow channel 222 and the two second inter-plate flow channels 223, and the fluids exchange heat with adjacent fluids of different temperatures through the plates. Before fluid distribution, the fluid is typically turbulent to improve the uniformity of fluid distribution. In related technologies, the inlet of the fluid entering the distribution channel is concentrically arranged with the distribution channel. The fluid is reflected at the bottom of the distribution channel, and the reflected fluid collides with the fluid entering from the inlet, thus failing to form turbulence and affecting the uniformity of fluid distribution.

[0019] In this application, the plate heat exchanger 100 includes a main body 2, which includes a plurality of plates 21. The plurality of plates 21 are stacked along the height direction of the plate heat exchanger 100. The main body 2 has a distribution channel 221, a first inter-plate channel 222, and at least two second inter-plate channels 223. The at least two second inter-plate channels 223 are all connected to the distribution channel 221. The distribution channel 221 and the second inter-plate channels 223 are fluidly isolated from the first inter-plate channel 222. The plate heat exchanger 100 includes a connecting pipe 1, which is connected to the main body 2. Under normal circumstances, fluid enters the connecting pipe 1 and enters the distribution channel 221 through the first port.

[0020] The connecting pipe 1 has a first port 11 and a second port 14. Along the stacking direction H of the multiple plates 21, the first port 11 is closer to the distribution channel 221 than the second port 14. The wall corresponding to the distribution channel 221 includes a side wall 224 and a bottom wall 225. Along the stacking direction H of the multiple plates 21, the bottom wall 225 and the connecting pipe 1 are located on both sides of the distribution channel 221, and the side wall 224 is located on the periphery of the distribution channel 221. The plate heat exchanger has an opening 111 and a channel 112. The opening 111 includes the first port 11 and the wall corresponding to the first port 11. The channel 112 includes the distribution channel 221 and the side wall 224. As shown in Figures 1 and 4, the plane perpendicular to the stacking direction of the multiple plates 21 is defined as the projection plane. The orthographic projection of the opening 111 onto the projection plane is the first projection P1, and the orthographic projection of the channel 112 onto the projection plane is the second projection P2. The first projection P1 is eccentrically positioned relative to the second projection P2.

[0021] In some specific embodiments, the first projection P1 is located within the second projection P2. The projection surface has a first straight line L, which intersects the inner contour of the first projection P1 at a first point O1 and a second point O2. The first straight line L intersects the inner contour of the second projection P2 at a third point O3 and a fourth point O4. Along the first straight line L, the third point O3 is closer to the first point O1 relative to the fourth point O4. Along the first straight line L, the distance between the first point O1 and the third point O3 is a first distance S1, and the distance between the second point O2 and the fourth point O4 is a second distance S2. The first distance S1 is less than the second distance S2. As shown in Figure 7, fluid enters the distribution channel 221 from the first port 11 of the connecting pipe 1. The fluid impacts the bottom wall 225 of the distribution channel 221. The setting of the first distance S1 being smaller than the second distance S2 is equivalent to the connecting pipe 1 and the distribution channel 221 being eccentrically positioned. Due to the interaction of forces, the fluid bounces back to the wall corresponding to the first port 11, merging with the fluid exiting the first port 11 to form a surrounding flow, reducing the risk of direct collision between the bounced fluid and the fluid exiting the first port 11 in related technologies. Throughout the process, the fluid continuously rotates and flows around within the distribution channel 221, entering each channel and forming a uniform distribution.

[0022] In one embodiment, the fluid may be a refrigerant.

[0023] Furthermore, generally, the first opening 11 is circular. In one embodiment, as shown in FIG7, the first projection P1 has a first inner diameter D1, and the second projection P2 has a second inner diameter D2, wherein 2D1 is less than or equal to D2. The restriction that 2D1 is less than or equal to D2 allows the fluid flowing into the distribution channel 221 to form a jet.

[0024] Furthermore, in one embodiment, as shown in FIG7, the inner contour of the first projection P1 at least partially overlaps with the inner contour of the second projection P2; for example, the first point O1 may overlap with the third point O3. That is, the first projection P1 is tangent to the second projection P2, which can form a large-scale rotational flow. In other embodiments, there is a gap between the first point O1 and the third point O3.

[0025] In some embodiments, the inner contours of the first projection P1 and the second projection P2 are both circles. That is, the first opening 11 is a circular opening, and the distribution channel 221 is a circular channel.

[0026] In other embodiments, the distribution channel is an irregular channel. Specifically, for example, the main body 2 includes an inner contour portion 23 and an outer contour portion 25. The inner contour portion 23 forms part of the wall of the distribution channel 221. Along the direction perpendicular to the stacking direction of the multiple plates 21, the inner contour portion 23 is closer to the distribution channel 221 than the outer contour portion 25. The second projection P2 is the orthographic projection of the inner contour portion 23 onto the projection plane.

[0027] In order to reduce the local resistance of the fluid at the bottom plate 24 of the distribution channel 221 and promote the formation of fluid rotation flow, in one embodiment, as shown in FIG1, the main body 2 includes a bottom plate 24, which is a part of the wall of the distribution channel 21. Along the stacking direction of the plurality of plates 21, the bottom plate 24 is away from the first opening 11 relative to the distribution channel 221.

[0028] In a first embodiment of this application, the base plate 24 has a first groove 241, which is recessed in the direction away from the first opening 11 along the stacking direction H of the plurality of plates 21. When the first groove 241 is an arc shape recessed in the direction away from the first opening 11, the fluid can be ejected more on the arc surface of the first groove 241, reducing the influence of local resistance at the base plate 24 on the fluid ejection.

[0029] Furthermore, when the bottom of the first groove is spherical, in one embodiment, as shown in FIG8, the orthographic projection of the first groove 241 onto the projection plane is a third projection P3. Specifically, the third projection P3 is a circular surface with a diameter of D3, which is greater than or equal to D2. When D3 is greater than or equal to D2, the influence of local resistance at the bottom plate 24 on fluid ejection is further reduced, thereby promoting the formation of fluid rotation and flow.

[0030] In existing technologies, U-shaped distribution pipes are used. Although the fluid can slide along the U-shaped pipe, alleviating the accumulation of fluid at the bottom plate 24, due to gravity, a large amount of fluid still remains at the bottom, resulting in minimal improvement in distribution uniformity and limited enhancement of heat exchange performance. To increase fluid pressure drop, enable normal fluid rotation and flow, reduce fluid stagnation near the wall corresponding to the first opening 11, and reduce fluid accumulation at the bottom plate 24, in one embodiment, as shown in FIG2, the plate heat exchanger 100 includes a flow divider 3 located in the distribution channel 221. The flow divider 3 has a first hole 31 and a second hole 32 that penetrate along the thickness direction T of the flow divider 3. Along the stacking direction H of the multiple plates 21, the first hole 31 is closer to the first opening 11 than the second hole 32. Both the first hole 31 and the second hole 32 are connected to the distribution channel 221. The flow divider 3 is at least partially fixedly connected to the bottom plate 24. Meanwhile, along the direction perpendicular to the stacking direction of the multiple plates 21, the first opening 11 is located on one side of the flow divider 3. The diverter plate 3 divides the distribution channel 221 into a first cavity 26 and a second cavity 27. Along the direction perpendicular to the stacking direction of the multiple plates 21, the first cavity 26 is closer to the first opening 11 than the second cavity 27, and the first cavity 26 is directly connected to the first opening 11. The first cavity 26 is connected to the second cavity 27 through the first hole 31, and the first cavity 26 is connected to the second cavity 27 through the second hole 32.

[0031] The placement of the first hole 31 and the second hole 32 increases the local resistance near the first hole 31 and the second hole 32, increasing the pressure drop. The fluid enters the first chamber 26 from the connecting pipe 1 through the first port 11, and the fluid enters the second chamber 27 through the second hole 32. Due to the increased pressure drop, the fluid flow rate increases. The fluid in the second chamber 27 passes through the first hole 31 and re-enters the first chamber 26. The fluid entering the first chamber 26 merges with the fluid near the first port 11, forming a rotating flow around the fluid, reducing the fluid stagnation near the first port 11 and improving the uniformity of fluid distribution.

[0032] Furthermore, in one embodiment, as shown in Figures 2 and 6, the flow area of ​​the first orifice 31 is less than or equal to the flow area of ​​the first opening 11, and the flow area of ​​the second orifice 32 is less than or equal to the flow area of ​​the first opening 11. This arrangement results in a higher flow velocity and a larger pressure drop for the fluid entering through the first opening 11 compared to either the first orifice 31 or the second orifice 32. In another embodiment, as shown in Figure 2, the first orifice 31 and the second orifice 32 are circular in shape, which can reduce the local resistance near the first orifice 31 and the second orifice 32.

[0033] In one embodiment, the presence of the flow divider 3 eliminates the need for the first groove 241, thereby reducing the thickness of the base plate 24. A thinner base plate 24 allows for faster heat transfer during brazing, resulting in more reliable welding. Of course, in other embodiments, the plate heat exchanger may have both the flow divider 2 and the first groove 241.

[0034] To fix the diverter plate 3, in one embodiment, as shown in FIG3, the base plate 24 has a second groove 245, which is recessed in the direction away from the connecting pipe 1 along the stacking direction of the plurality of plates 21. The diverter plate 3 is partially located in the second groove 245 and is connected to the wall of the second groove 245; the second hole 32 is at least partially located outside the second groove 245. The second groove 245 limits the position of the diverter plate 3 and fixes the diverter plate 3. Specifically, the diverter plate 3 includes a top 35 and a side 36. Along the stacking direction H of the plurality of plates 21, the top 35 is closer to the first opening 11 relative to the first hole 31, and along the direction perpendicular to the stacking direction H of the plurality of plates 21, the side 36 is closer to the wall corresponding to the distribution channel 221 relative to the first hole 31. Furthermore, in one embodiment, as shown in FIG9, at least one of the top 35, side 36, and bottom 351 is in contact with the wall of the distribution channel 221. The top 35 is in contact with the wall of the distribution channel 221 and is connected to the wall of the distribution channel 221. The side 36 is in contact with the wall of the distribution channel 221 and is connected to the wall of the distribution channel 221. This reduces the back-and-forth flow of fluid from the gap between the top 35 and the wall of the distribution channel 221 in the first cavity 26 and the second cavity 27, thereby affecting the fluid rotation and flow around the fluid, and thus affecting the fluid distribution efficiency.

[0035] When the fluid flow rate is small, in one embodiment, as shown in Figures 4 and 5, the main body 2 includes a base plate 24, which at least partially forms the wall of the distribution channel 221. The base plate 24 is located away from the first opening 11 relative to the distribution channel 221. The base plate 24 has a channel 246, which has a first opening 247 and a second opening 248. Both the first opening 247 and the second opening 248 are connected to the distribution channel 221. The fluid enters through the first opening 247 and exits through the second opening 248 in the channel 246. The first opening 247 is at least partially aligned with the first opening 11, and the flow area of ​​the first opening 247 is larger than the flow area of ​​the second opening 248. The fluid enters through a large opening and exits through a small opening, forming a special tapered jet structure. The fluid flows in from the large opening, the cross-sectional area gradually decreases, the flow velocity continuously increases, and it is ejected at the small opening, forming a jet. The fluid is ejected to the inlet and merges with the mainstream refrigerant, forming a rotating flow. The arrangement of the channel 246, the first opening 247, and the second opening 248 in the base plate 24 forces the fluid flow to change direction, and the jet structure from large to small enhances the formation of the rotating flow around the surface.

[0036] Furthermore, in one embodiment, as shown in FIG5, the plate heat exchanger 100 includes a flow divider 3 located in the distribution channel 221. The flow divider 3 has a first hole 31 extending through it along the thickness direction T of the flow divider 3, communicating with the distribution channel 221. Along the stacking direction of the plurality of plates 21, the first hole 31 is closer to the first opening 1 relative to the bottom plate 24. Along the thickness direction of the flow divider 3, the first opening 247 and the second opening 248 are respectively located on both sides of the flow divider 3. Along the direction perpendicular to the stacking direction H of the plurality of plates 21, the first opening 247 is closer to the first opening 11 relative to the second opening 248. In the direction perpendicular to the stacking direction H of the plurality of plates 21, the first opening 11 is located on one side of the flow divider 3. In other words, in order to increase the formation of fluid rotation flow, with the fluid entering through a large opening and exiting through a small opening to form a special reduced jet structure, the fluid enters the first chamber 26 through the first hole 31 in the second chamber 27. The first hole 31 increases the fluid pressure drop, thereby further improving the fluid rotation flow. In one embodiment, the first hole 31 is circular.

[0037] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A plate heat exchanger (100) comprising a main body (2), the main body (2) comprising a plurality of plates (21) stacked along the height direction of the plate heat exchanger (100), the main body (2) having a distribution channel (221), a first inter-plate channel (222) and at least two second inter-plate channels (223), the at least two second inter-plate channels (223) being connected to the distribution channel (221), and the distribution channel (221) and the second inter-plate channels (223) being fluidly isolated from the first inter-plate channel (222), wherein, The plate heat exchanger (100) includes a connecting pipe (1) connected to the main body (2). The connecting pipe (1) has a first port (11) and a second port (14). Along the height direction of the plate heat exchanger (100), the first port (11) is closer to the distribution channel (221) than the second port (14). The walls corresponding to the distribution channel (221) include a side wall (224), a bottom wall (225), and a top wall (226). The top wall (226) is closer to the first opening (11) relative to the bottom wall (225). Along the stacking direction of the plurality of plates (21), the bottom wall (225) and the connecting pipe (1) are located on both sides of the distribution channel (221), and the side wall (224) is located on the periphery of the distribution channel (221). The plate heat exchanger has an opening (111) and a channel (112). The opening (111) includes the first opening (11) and the wall corresponding to the first opening (11). The top wall (226) is part of the wall corresponding to the first opening (11). The channel (112) includes the distribution channel (221) and the side wall (224). A plane perpendicular to the height direction of the plate heat exchanger (100) is defined as the projection plane. The orthographic projection of the opening (111) onto the projection plane is the first projection (P1), and the orthographic projection of the flow channel (112) onto the projection plane is the second projection (P2). The first projection (P1) is eccentrically positioned relative to the second projection (P2).

2. The plate heat exchanger according to claim 1, wherein, The first projection (P1) is located within the second projection (P2). The projection surface has a first straight line (L). The first straight line (L) intersects the inner contour of the first projection (P1) at a first point (O1) and a second point (O2). The first straight line (L) intersects the inner contour of the second projection (P2) at a third point (O3) and a fourth point (O4). Along the first straight line (L), the third point (O3) is closer to the first point (O1) relative to the fourth point (O4). Along the first straight line (L), the distance between the first point (O1) and the third point (O3) is a first distance (S1), and the distance between the second point (O2) and the fourth point (O4) is a second distance (S2). The first distance (S1) is smaller than the second distance (S2).

3. The plate heat exchanger according to claim 2, characterized in that, The first point (O1) coincides with the third point (O3), or there is a gap between the first point (O1) and the third point (O3).

4. The plate heat exchanger according to any one of claims 1 to 3, wherein, The first projection (P1) has a first inner diameter D1, and the second projection (P2) has a second inner diameter D2, wherein 2D1 is less than or equal to D2.

5. The plate heat exchanger according to any one of claims 1 to 4, wherein, The inner contour of the first projection (P1) partially overlaps with the inner contour of the second projection (P2).

6. The plate heat exchanger according to claim 5, wherein, The inner contours of the first projection (P1) and the second projection (P2) are both circular, and the first projection (P1) and the second projection (P2) are tangent.

7. The plate heat exchanger according to any one of claims 1 to 6, wherein, The main body (2) includes a base plate (24), which is a part of the wall of the distribution channel (221). Along the stacking direction of the plurality of plates (21), the base plate (24) is away from the first opening (11) relative to the distribution channel (221); The base plate (24) has a first groove (241) which is recessed in the direction away from the first opening (11) along the height direction of the plate heat exchanger (100), and the distribution channel (221) is connected to the first groove (241).

8. The plate heat exchanger according to claim 7, wherein, The bottom of the first groove (241) is spherical.

9. The plate heat exchanger according to claim 7 or 8, wherein, The second projection (P2) has a second inner diameter D2, and the first groove (241) is projected onto the projection plane as a third projection (P3), the diameter of the third projection (P3) is D3, and D3 is greater than or equal to D2.

10. The plate heat exchanger according to any one of claims 1 to 6, wherein, The main body (2) includes a base plate (24), which is a part of the wall of the distribution channel (221). Along the stacking direction of the plurality of plates (21), the base plate (24) is away from the first opening (11) relative to the distribution channel (221); The base plate (24) has a channel (246) with a first opening (247) and a second opening (248). Both the first opening (247) and the second opening (248) are connected to the distribution channel (221). The first opening (247) is at least partially aligned with the first port (11).

11. The plate heat exchanger according to claim 10, wherein, Along the height direction perpendicular to the plate heat exchanger (100), the first opening (247) is closer to the first opening (11) relative to the second opening (248), and the flow area of ​​the first opening (247) is larger than the flow area of ​​the second opening (248).

12. The plate heat exchanger according to claim 11, wherein, Along the direction from the second opening (248) to the first opening (247), the flow area of ​​the channel (246) gradually increases.

13. The plate heat exchanger according to any one of claims 7 to 12, wherein, The thickness of the base plate (24) is greater than the thickness of the plate (21).

14. The plate heat exchanger according to any one of claims 1-13, wherein, The plate heat exchanger (100) includes a flow divider (3), which is located in the distribution channel (221). The flow divider (3) has a first hole (31) and a second hole (32) that are disposed through the thickness direction of the flow divider (3). Along the stacking direction of the plurality of plates (21), the first hole (31) is closer to the first opening (11) than the second hole (32). Both the first hole (31) and the second hole (32) are connected to the distribution channel (221). The flow divider plate (3) is at least partially fixedly connected to the base plate (24); the first port (11) is located on one side of the flow divider plate (3) along the direction perpendicular to the height of the plate heat exchanger (100).

15. The plate heat exchanger according to claim 14, wherein, The diversion plate (3) divides the distribution channel (221) into the first cavity (26) and the second cavity (27). Along the direction perpendicular to the height of the plate heat exchanger (100), the first cavity (26) is closer to the first port (11) than the second cavity (27), and the first cavity (26) is directly connected to the first port (11).

16. The plate heat exchanger according to claim 14, wherein, The flow area of ​​the second hole (32) is less than or equal to the flow area of ​​the first hole (11).

17. The plate heat exchanger according to claim 14, wherein, The base plate (24) has a second groove (245) which is recessed in the direction away from the connecting pipe (1) along the stacking direction of the plurality of plates (21). The diverter plate (3) is partially located in the second groove (245) and the diverter plate (3) is connected to the wall of the second groove (245). The second hole (32) is at least partially located outside the second groove (245).

18. The plate heat exchanger according to claim 14, wherein, The flow divider (3) includes a top (35) and a bottom (351). Along the height direction of the plate heat exchanger (100), the first hole (31) is provided through the top (35). Along the direction perpendicular to the height direction of the plate heat exchanger (100), the side portion (36) is close to the wall corresponding to the distribution channel (221) relative to the first hole (31).

19. The plate heat exchanger according to claim 18, wherein, The flow divider (3) includes a side portion (36) located at least partially between the top (35) and the bottom (351) along the height direction of the plate heat exchanger. At least one of the top (35), the side portion (36) and the bottom (351) is in contact with the wall of the distribution channel (221).

20. The plate heat exchanger according to claim 19, wherein, The flow area of ​​the first hole (31) is less than or equal to the flow area of ​​the first opening (1).

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