Core plate structure and plate heat exchanger

Abstract

The utility model provides a core plate structure and a plate heat exchanger. The core plate structure comprises a core plate. The core plate is sequentially divided into a first area, a second area and a third area in the first direction. The first end face of the core plate protrudes towards the second end face to form an S-shaped protrusion extending in the first direction. A plurality of bulges are arranged, and the plurality of bulges are arranged at intervals along a second direction; the distance between every two adjacent protrusions in the first area is H1, the distance between every two adjacent protrusions in the second area is H2, the distance between every two adjacent protrusions in the third area is H3, and H2 is larger than H1 and smaller than H3, namely, the distance between every two adjacent protrusions in the first area is minimum, the density is maximum, and the resistance is maximum; the distance between the adjacent protrusions in the third area is the largest, the density is the smallest, then the resistance of cooling liquid in the second area and the third area is reduced, the fluid speed can be balanced, and then the heat exchange efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a core plate structure and a plate heat exchanger. Background Art

[0002] The core plate of the heat exchanger is the basis for heat exchange between cold and hot fluids. It is both a heat transfer element and a pressure bearing element. At present, most core plates of heat exchangers use herringbone corrugated core plates, which have the advantages of good heat transfer and high pressure resistance. Specifically, two adjacent core plates are inverted and combined to form a herringbone flow channel that crosses up and down. When the fluid passes through the channel, it presents an irregular fluid shape.

[0003] However, the current herringbone corrugated core plate has the following shortcomings: the flow at the inlet and outlet ends is close to the inlet and outlet ends, so a high-density fluid area will be formed near the inlet and outlet ends, a low-density fluid area will be formed at the position farthest from the inlet and outlet ends, and a medium-density fluid area will be formed between the high-density fluid area and the low-density fluid area; this fluid distribution area will lead to poor heat exchange effect.

[0004] The flow distance near the inlet and outlet is small and the flow rate is high, which is a high-density area of ​​the fluid. Therefore, the core plate structure and plate heat exchanger are urgently needed to solve the technical problems existing in the existing technology to a certain extent. Utility Model Content

[0005] The purpose of the present application is to provide a core plate structure and a plate heat exchanger, which can to a certain extent solve the technical problem of poor heat exchange effect caused by the use of herringbone corrugated core plates in the prior art.

[0006] The present application provides a core plate structure, comprising a core plate;

[0007] The core plate is divided into a first area, a second area and a third area in sequence along the first direction; a first end surface of the core plate protrudes toward the second end surface with an S-shaped protrusion extending along the first direction; a plurality of protrusions are provided, and the plurality of protrusions are arranged at intervals along the second direction;

[0008] The distance between adjacent protrusions in the first region is H1, the distance between adjacent protrusions in the second region is H2, and the distance between adjacent protrusions in the third region is H3, and H1<H2<H3.

[0009] In the above technical solution, further, H1 is set between 3.3-3.6 cm, H2 is set between 3.1-3.2 cm, and H3 is set between 2.9-3.0 cm.

[0010] In the above technical solution, further, the angle formed between the protrusion and the highest point of the core plate and the core plate is set in the range of 60° to 80°.

[0011] In the above technical solution, further, the angle formed by the protrusion on the first area and the highest point of the core plate is α1, the angle formed by the protrusion on the second area and the highest point of the core plate is α2, and the angle formed by the protrusion on the third area and the highest point of the core plate is α3, wherein α1>α2>α3.

[0012] In the above technical solution, further, the core plate is formed with cooling liquid conducting parts and refrigerant conducting parts at intervals along the first direction;

[0013] The cooling liquid conducting portion includes a cooling liquid inlet and a cooling liquid outlet arranged at intervals along the second direction; the refrigerant conducting portion includes a refrigerant outlet and a refrigerant inlet arranged at intervals along the second direction, and the cooling liquid inlet and the refrigerant outlet as well as the cooling liquid outlet and the refrigerant inlet are both located in the first direction.

[0014] In the above technical solution, further, the circumferential edges of the coolant inlet and the coolant outlet are provided with a first cavity protrusion protruding from the first end surface toward the second end surface of the core plate;

[0015] A second chamber protrusion protrudes from the second end surface of the core plate toward the first end surface at the circumferential edges of the refrigerant inlet and the refrigerant outlet.

[0016] In the above technical solution, further, an arc-shaped guide portion protruding from the first end surface toward the second end surface of the core plate is provided between the coolant inlet and the refrigerant outlet and between the coolant outlet and the refrigerant inlet.

[0017] In the above technical solution, further, a scattering guide portion is provided on a side of the coolant inlet facing away from the coolant outlet and on a side of the refrigerant inlet facing away from the refrigerant outlet.

[0018] In the above technical solution, further, an arc-shaped throttling portion is provided on a side of the coolant outlet away from the coolant inlet and on a side of the refrigerant outlet away from the refrigerant inlet.

[0019] The present application also provides a plate heat exchanger, comprising the core plate structure described above;

[0020] The core plates are provided in plurality, and the plurality of core plates are arranged inverted in sequence along a third direction, so that a first chamber protrusion corresponding to the coolant inlet in one of the adjacent core plates is in contact with a second chamber protrusion corresponding to the refrigerant inlet in another core plate and surrounds a coolant chamber, and a second chamber protrusion corresponding to the refrigerant outlet in the adjacent core plate is in contact with a coolant outlet in another core plate.

[0021] Compared with the prior art, this application has the following beneficial effects:

[0022] The present application provides a core plate structure, comprising a core plate;

[0023] The core plate is divided into a first area, a second area and a third area in sequence along the first direction; a first end surface of the core plate protrudes toward the second end surface with an S-shaped protrusion extending along the first direction; a plurality of protrusions are provided, and the plurality of protrusions are arranged at intervals along the second direction;

[0024] The distance between adjacent protrusions in the first region is H1, the distance between adjacent protrusions in the second region is H2, and the distance between adjacent protrusions in the third region is H3, then H1<H2<H3, that is, the distance between adjacent protrusions in the first region is the smallest, that is, the protrusion density in the first region is the largest, and the distance between adjacent protrusions in the third region is the largest, that is, the protrusion density in the third region is the smallest. Furthermore, the coolant conduction portion on the core plate is located in the first region, and the refrigerant conduction portion is located in the third region. Therefore, when the coolant flows into the core plate through the inlet, due to the large density of protrusions in the first region, the coolant in the first region will be subject to greater resistance, which reduces the flow rate of the coolant. Due to the small regional density of the protrusions in the second region and the third region, the resistance of the coolant in the second region and the third region is reduced, which can increase the flow rate to a certain extent. In summary, the overall speed of the coolant when flowing through the core plate can be the same to a certain extent, balancing the fluid speed, thereby improving the heat exchange efficiency.

[0025] The present application also provides a plate heat exchanger, comprising the core plate structure described above;

[0026] The core plates are provided in plurality, and the plurality of core plates are arranged inverted in sequence along a third direction, so that a first chamber protrusion corresponding to the coolant inlet in one of the adjacent core plates is in contact with a second chamber protrusion corresponding to the refrigerant inlet in another core plate and surrounds a coolant chamber, and a second chamber protrusion corresponding to the refrigerant outlet in the adjacent core plate is in contact with a coolant outlet in another core plate.

[0027] In summary. The flow direction of the coolant is: coolant chamber-coolant inlet-first area-second area-third area-coolant outlet. The flow direction of the refrigerant is: refrigerant chamber-refrigerant inlet-first area-second area-third area-refrigerant outlet, thereby realizing heat exchange between the coolant and the refrigerant. Because the flow speeds of the coolant and the refrigerant in the first area, the second area and the third area in the core plate are the same, the heat exchange efficiency between the coolant and the refrigerant is improved to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the structure of the core plate provided in this application at a first viewing angle;

[0030] Figure 2 for Figure 1 A magnified image of point A;

[0031] Figure 3 for Figure 1 The enlarged view of point B;

[0032] Figure 4 A schematic diagram of the structure of the core plate provided in this application at a second viewing angle;

[0033] Figure 5 A schematic diagram of the structure of three core plate structures provided in this application, placed inverted together and viewed from a first perspective;

[0034] Figure 6 for Figure 5 Enlarged view of point C;

[0035] Figure 7 for Figure 5 The enlarged view of point D;

[0036] Figure 8 A schematic diagram of the structure of three core plate structures provided in the present application, placed inverted together and viewed from a second perspective;

[0037] Fig. 9 A schematic diagram of the structure of the plate heat exchanger provided for this application;

[0038] Figure markings: 1-core plate; 2-first direction; 3-first area; 4-second area; 5-third area; 6-first end face; 7-second end face; 8-protrusion; 9-second direction; 12-cooling liquid inlet; 13-cooling liquid outlet; 14-refrigerant outlet; 15-refrigerant inlet; 16-first chamber protrusion; 17-second chamber protrusion; 21-arc-shaped guide protrusion; 22-scattering guide protrusion; 25-arc-shaped throttling protrusion; 26-third direction; 27-cooling liquid chamber; 28-plate heat exchanger. DETAILED DESCRIPTION

[0039] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0040] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0041] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0042] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0043] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0044] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0045] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0046] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0047] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0048] Embodiment 1

[0049] Combination Figure 1-Figure 3 As shown, a core board 1 structure provided by the present application is described in detail.

[0050] In this embodiment, a core panel 1 structure is provided, including a core panel 1 .

[0051] Specifically, the core plate 1 is divided into a first area 3, a second area 4 and a third area 5 in sequence along the first direction 2; Figure 1 As shown, the first direction 2 refers to the width direction of the core plate 1 , that is, the core plate 1 is divided into a first area 3 , a second area 4 and a third area 5 in sequence along the width direction.

[0052] Specifically, the first end surface 6 of the core plate 1 has an S-shaped protrusion 8 extending along the first direction 2 protruding toward the second end surface 7; since the first direction 2 refers to the width direction of the core plate 1, the S-shaped protrusion 8 here extends along the width direction of the core plate 1.

[0053] Specifically, a plurality of protrusions 8 are provided, and the plurality of protrusions 8 are arranged at intervals along the second direction 9. Figure 1 As shown, the second direction 9 refers to the length direction of the core plate 1 , that is, the plurality of protrusions 8 are arranged at intervals along the length direction of the core plate 1 .

[0054] Specifically, the distance between adjacent protrusions 8 in the first region 3 is H1, the distance between adjacent protrusions 8 in the second region 4 is H2, and the distance between adjacent protrusions 8 in the third region 5 is H3, then H1<H2<H3, that is, the distance between adjacent protrusions 8 in the first region 3 is the smallest, that is, the density of protrusions 8 in the first region 3 is the largest, and the distance between adjacent protrusions 8 in the third region 5 is the largest, that is, the density of protrusions 8 in the first region 3 is the smallest. Further, combined with Figure 1 As described, the coolant conducting portion (the coolant conducting portion is described below) on the core plate 1 is located in the first area 3, and the refrigerant conducting portion (the refrigerant conducting portion is described below) is located in the third area 5. Therefore, when the coolant flows into the core plate 1 through the inlet, due to the high density of the protrusions 8 in the first area 3, the coolant will encounter greater resistance in the first area 3, which reduces the flow rate of the coolant. Since the protrusions 8 in the second area 4 and the regional density in the third area 5 are small, the resistance of the coolant in the second area 4 and the third area 5 is reduced, which can increase the flow rate to a certain extent. In summary, the overall speed of the coolant when flowing through the core plate 1 can be the same to a certain extent, the fluid speed is balanced, and the heat exchange efficiency is improved.

[0055] In this embodiment, H3 is set between 3.3-3.6 cm, H2 is set between 3.1-3.2 cm, and H1 is set between 2.9-3.0 cm.

[0056] Preferably, H1 is 2.9 cm; H2 is 3 cm; and H3 is 3.5 cm.

[0057] In this embodiment, the angle formed between the highest point of the protrusion 8 and the core plate 1 is set in the range of 60° to 80°.

[0058] Specifically, in order to further increase the resistance of the first area 3 and reduce the resistance of the third area 5, the present application has the following conception: the angle formed between the protrusion 8 on the first area 3 and the highest point of the core plate 1 and the core plate 1 is α1, the angle formed between the protrusion 8 on the second area 4 and the highest point of the core plate 1 and the core plate 1 is α2, and the angle formed between the protrusion 8 on the third area 5 and the highest point of the core plate 1 and the core plate 1 is α3, wherein α1>α2>α3. That is, the angle α1 formed between the protrusion 8 on the first area 3 and the highest point of the core plate 1 and the core plate 1 is the largest. When the coolant flows, it will encounter greater resistance. The coolant first flows along the extension direction of the groove (because the protrusion 8 protrudes from the first end face 6 of the core plate 1 toward the second end face 7, a groove corresponding to the protrusion 8 will be formed on the second end face 7, and the coolant actually flows in the groove) from the first area 3 to the third area 5 (the bottom edge of the core plate 1), and then reflects to the third area 5 of another adjacent groove after reaching the bottom edge. Since the α3 of the third area 5 is relatively small, the flow velocity of the coolant between the third areas 5 of adjacent grooves will be increased, so that the flow velocities of the coolant in the first area 3, the second area 4 and the third area 5 are similar, thereby improving the heat exchange efficiency to a certain extent.

[0059] In this embodiment, the core plate 1 is formed with cooling liquid conducting portions and refrigerant conducting portions at intervals along the first direction 2 .

[0060] Specifically, the coolant conducting portion includes a coolant inlet 12 and a coolant outlet 13 arranged at intervals along the second direction 9, and the coolant inlet 12 and the coolant outlet 13 are located in the first area 3; the refrigerant conducting portion includes a refrigerant outlet 14 and a refrigerant inlet 15 arranged at intervals along the second direction 9, and the refrigerant outlet 14 and the refrigerant inlet 15 are located in the third area 5; the coolant inlet 12 and the refrigerant outlet 14 as well as the coolant outlet 13 and the refrigerant inlet 15 are all located in the first direction 2.

[0061] Furthermore, in the actual working process, the coolant conducting part is used to conduct the coolant; the refrigerant conducting part is used to conduct the refrigerant; further, the coolant is introduced into the core plate 1 from the coolant inlet 12, a part of it is diverted from the right side of the core plate 1 to the left side of the core plate 1 along the first area 3, and the other part is diverted from the first area 3 to the second area 4 along the width direction of the core plate 1, and then diverted to the third area 5, and from the right side of the third area 5 to the left side of the third area 5, and finally diverted from the third area 5 to the first area 3 and discharged from the coolant outlet 13.

[0062] In this embodiment, the circumferential edges of the coolant inlet 12 and the coolant outlet 13 protrude from the first end face 6 of the core plate 1 toward the second end face 7 with a first chamber protrusion 16. The circumferential edges of the refrigerant inlet 15 and the refrigerant outlet 14 protrude from the second end face 7 of the core plate 1 toward the first end face 6 with a second chamber protrusion 17.

[0063] Specifically, an arc-shaped guide portion protruding from the first end surface 6 toward the second end surface 7 of the core plate 1 is provided between the coolant inlet 12 and the refrigerant outlet 14 and between the coolant outlet 13 and the refrigerant inlet 15 .

[0064] Furthermore, the arc-shaped guide portion is an arc-shaped guide protrusion 21. The coolant introduced from the coolant inlet 12 is guided from the first area 3 to the third area 5 under the action of the arc-shaped guide protrusion 21, which accelerates the flow rate of the coolant to a certain extent, thereby increasing the amount of coolant in the third area 5.

[0065] Furthermore, a plurality of arc-shaped flow-guiding protrusions 21 are provided, and the plurality of arc-shaped flow-guiding protrusions 21 are arranged at intervals along the length direction of the core plate 1 .

[0066] Specifically, a scattering guide portion is provided on a side of the coolant inlet 12 facing away from the coolant outlet 13 and on a side of the refrigerant inlet 15 facing away from the refrigerant outlet 14 .

[0067] Furthermore, the scattering guide portion is a scattering guide protrusion 22 , and a plurality of scattering guide protrusions 22 are provided, extending in a scattering manner from a side of the coolant inlet 12 away from the coolant outlet 13 and from a side of the refrigerant inlet 15 away from the refrigerant outlet 14 .

[0068] Specifically, an arc-shaped throttling portion is provided on a side of the coolant outlet 13 facing away from the coolant inlet 12 and on a side of the refrigerant outlet 14 facing away from the refrigerant inlet 15 .

[0069] Furthermore, the arc-shaped throttling portion is an arc-shaped throttling protrusion 25 .

[0070] Embodiment 2

[0071] Combination Figure 1-9 A plate heat exchanger 28 provided in the present application is described in detail.

[0072] In this embodiment, a plate heat exchanger 28 is provided, which includes the core plate 1 structure described in the above embodiment.

[0073] Specifically, a plurality of core plates 1 are provided, and the plurality of core plates 1 are sequentially arranged in an inverted manner along the third direction 26. Further, assuming that there are two core plates, the first core plate is Figure 1 Place it as in the figure, and rotate the second core plate 180° and place it on the first core plate.

[0074] Furthermore, the first chamber protrusion 16 corresponding to the coolant inlet 12 in one of the adjacent core plates 1 is connected to the second chamber protrusion 17 corresponding to the refrigerant inlet 15 in the other core plate 1 and surrounds a coolant chamber 27, and the second chamber protrusion 17 corresponding to the refrigerant outlet 14 in the adjacent core plate 1 is abutted against the coolant outlet 13 in the other core plate 1.

[0075] Furthermore, the third direction 26 is a thickness direction of the plate heat exchanger 28 .

[0076] In actual use, the flow direction of the coolant is: coolant chamber 27-coolant inlet 12-first area 3-second area 4-third area 5-coolant outlet 13. The flow direction of the refrigerant is: refrigerant chamber-refrigerant inlet 15-first area 3-second area 4-third area 5-refrigerant outlet 14, thereby achieving heat exchange between the coolant and the refrigerant. Since the flow speeds of the coolant and the refrigerant in the first area 3, the second area 4 and the third area 5 in the core plate 1 are the same, the heat exchange efficiency between the coolant and the refrigerant is improved to a certain extent.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A core plate structure, characterized in that: Including core board; The core plate is divided into a first area, a second area and a third area in sequence along the first direction; a first end surface of the core plate protrudes toward the second end surface with an S-shaped protrusion extending along the first direction; a plurality of protrusions are provided, and the plurality of protrusions are arranged at intervals along the second direction; The distance between adjacent protrusions in the first region is H1, the distance between adjacent protrusions in the second region is H2, and the distance between adjacent protrusions in the third region is H3, and H1<H2<H3.

2. The core plate structure according to claim 1, characterized in that: The H3 is set between 3.3-3.6 cm, the H2 is set between 3.1-3.2 cm, and the H1 is set between 2.9-3.0 cm.

3. The core plate structure according to claim 1, characterized in that: The angle formed between the protrusion and the highest point of the core plate is set in the range of 60° to 80°.

4. The core plate structure according to claim 3, characterized in that: The angle formed between the protrusion on the first area and the highest point of the core plate is α1, the angle formed between the protrusion on the second area and the highest point of the core plate is α2, and the angle formed between the protrusion on the third area and the highest point of the core plate is α3, wherein α1>α2>α3.

5. The core plate structure according to claim 1, characterized in that: The core plate is formed with cooling liquid conducting parts and refrigerant conducting parts at intervals along the first direction; The cooling liquid conducting portion includes a cooling liquid inlet and a cooling liquid outlet arranged at intervals along the second direction; the refrigerant conducting portion includes a refrigerant outlet and a refrigerant inlet arranged at intervals along the second direction, and the cooling liquid inlet and the refrigerant outlet as well as the cooling liquid outlet and the refrigerant inlet are both located in the first direction.

6. The core plate structure according to claim 5, characterized in that: The circumferential edges of the coolant inlet and the coolant outlet are provided with a first cavity protrusion protruding from the first end surface toward the second end surface of the core plate; A second chamber protrusion protrudes from the second end surface of the core plate toward the first end surface at the circumferential edges of the refrigerant inlet and the refrigerant outlet.

7. The core plate structure according to claim 6, characterized in that: An arc-shaped flow guide portion protruding from the first end surface toward the second end surface of the core plate is provided between the coolant inlet and the refrigerant outlet, and between the coolant outlet and the refrigerant inlet.

8. The core plate structure according to claim 6, characterized in that: A scattering guide portion is provided on a side of the coolant inlet facing away from the coolant outlet and on a side of the refrigerant inlet facing away from the refrigerant outlet.

9. The core plate structure according to claim 6, characterized in that: An arc-shaped throttling portion is provided on a side of the coolant outlet facing away from the coolant inlet and on a side of the refrigerant outlet facing away from the refrigerant inlet.

10. A plate heat exchanger, characterized in that: A core plate structure comprising any one of claims 6 to 9; The core plates are provided in plurality, and the plurality of core plates are arranged inverted in sequence along a third direction, so that a first chamber protrusion corresponding to the coolant inlet in one of the adjacent core plates is in contact with a second chamber protrusion corresponding to the refrigerant inlet in another core plate and surrounds a coolant chamber, and a second chamber protrusion corresponding to the refrigerant outlet in the adjacent core plate is in contact with a coolant outlet in another core plate.

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