Heat exchanger

Abstract

The present invention relates to a heat exchanger, and more particularly, to a heat exchanger of this kind having a branch pipe at the coolant outlet side, so that the size of the entire heat exchange system can be reduced and the packability can be improved.

Description

Technical Field

[0001] The present invention relates to a heat exchanger, and more specifically, to a heat exchanger in which branch pipes are arranged adjacent to coolant discharge ports, which allows for miniaturization of the entire heat exchange system and improves packageability. Background Technology

[0002] In the refrigeration cycle of a general-purpose air conditioner used in vehicles, the actual cooling operation is performed by an evaporator, where a liquid heat exchange medium is evaporated by absorbing heat corresponding to the evaporative heat from the surrounding environment. The gaseous heat exchange medium introduced from the evaporator to the compressor is compressed into a high-temperature, high-pressure heat exchange medium. The compressed gaseous heat exchange medium is liquefied as it passes through a condenser, causing the heat of liquefaction to be released to the surroundings. The liquefied heat exchange medium is then converted back into low-temperature, low-pressure, wet saturated vapor as it passes through an expansion valve, and then the heat exchange medium is reintroduced into the evaporator. These processes thus define the cycle.

[0003] In other words, a condenser can be either an air-cooled condenser or a liquid-cooled condenser. Air-cooled condensers use air as the heat exchange medium, while liquid-cooled condensers use a liquid. The heat exchange medium is used to cool the refrigerant. High-temperature, high-pressure gaseous refrigerant is introduced into the condenser, condenses during heat exchange and radiation to dissipate liquefaction heat, and is then discharged as a liquid. In recent years, liquid-cooled condensers have been widely used in the surge of electric vehicles.

[0004] Figure 1 This is a diagram illustrating a liquid-cooled condenser in the related art. The liquid-cooled condenser 20 may have a structure in which multiple plates 23 are stacked. More specifically, a first flow section 21 and a second flow section 22 through which a first heat exchange medium and a second heat exchange medium flow are formed by stacking multiple plates 23, and the liquid-cooled condenser 20 may include: a first inlet pipe 31 and a first outlet pipe 32 through which the first heat exchange medium is introduced and discharged; a second inlet pipe 41 and a second outlet pipe 42 through which the second heat exchange medium is introduced and discharged; a gas-liquid separator 50 configured to separate the first heat exchange medium into a gaseous heat exchange medium and a liquid heat exchange medium; a first connecting pipe 51 configured to connect the condensation region of the first flow section 21 and the gas-liquid separator 50; and a second connecting pipe 52 configured to connect the gas-liquid separator 50 and the subcooled region of the first flow section 21.

[0005] In the liquid-cooled condenser 20, a first heat exchange medium, introduced through the first inlet pipe 31, flows in the condensation region of the first flow section 21 and through the first connecting pipe 51 to the gas-liquid separator 50. The first heat exchange medium flows through the second connecting pipe 52 in the subcooled region of the first flow section 21 and is discharged through the first outlet pipe 32. In this case, a second heat exchange medium is introduced through the second connecting pipe 52 and flows to a second flow section 22 that alternates with the first flow section 21, allowing heat exchange to occur between the first and second heat exchange media. In this case, the first heat exchange medium can correspond to a refrigerant, and the second heat exchange medium can correspond to a coolant.

[0006] In electric vehicles, liquid-cooled condensers function as both condensers (for condensing the refrigerant during the cooling process) and evaporators (for evaporating the refrigerant during the heating process). Liquid-cooled condensers require the refrigerant to evaporate at a relatively low temperature during the cooling process, thus functioning as condensers. For this purpose, heat exchange in the radiator maintains the refrigerant at a relatively low temperature. Conversely, liquid-cooled condensers require the refrigerant to be heated at a relatively high temperature during the heating process, thus functioning as evaporators. For this purpose, waste heat from the PE components (electrical components) maintains the refrigerant at a relatively high temperature. In this case, cooling the refrigerant with a radiator during the heating process is unnecessary.

[0007] The coolant path needs to be adjusted to perform the aforementioned functions. Therefore, in related technologies, valves are installed in the coolant path. However, limited space and packaging constraints make valve installation difficult, causing unnecessary space occupation and requiring additional valve installation procedures.

[0008] [Related Technical Documents]

[0009] Korean Patent Application Publication No. 10-2021-0034954 (published on March 31, 2021) Summary of the Invention

[0010] Technical issues

[0011] The present invention aims to solve the above-mentioned problems. The purpose of the present invention is to provide a heat exchanger in which the branch pipe is arranged adjacent to the coolant discharge port, so that the entire heat exchange system can be miniaturized and the packability can be improved.

[0012] Technical solution

[0013] An example heat exchanger according to the invention may include: a core in which heat exchange occurs between a refrigerant and a coolant; a refrigerant inlet port through which refrigerant is introduced into the core; a refrigerant outlet port through which refrigerant is discharged from the core; a coolant inlet port through which coolant is introduced into the core; a coolant outlet port through which coolant is discharged from the core; and a branch pipe disposed adjacent to the coolant outlet port and configured to distribute the coolant to different paths.

[0014] The branch pipe may include: a coolant discharge pipe through which coolant is introduced from the coolant discharge port; and a first branch pipe and a second branch pipe branching off from the coolant discharge pipe.

[0015] The first branch pipe can deliver coolant to a first coolant path, and the second branch pipe can deliver coolant to a second coolant path. The first coolant path can be a path in which the coolant is cooled, and the second coolant path can be a path in which the coolant is heated.

[0016] Coolant that has moved to the first branch pipe can move through a path through a radiator configured to exchange heat with the outside air to lower the temperature of the coolant, and coolant that has moved to the second branch pipe can be heated by waste heat from electrical components that have a relatively higher temperature than the coolant.

[0017] The outer diameter of the first branch pipe can be equal to or greater than the outer diameter of the second branch pipe.

[0018] The coolant discharge pipe can be arranged downwards from the first branch pipe and the second branch pipe in the direction of gravity.

[0019] The branch pipe may have a structure in which the first branch pipe and the second branch pipe form an integrated pipe, and the end of the coolant discharge pipe is connected to the middle part of the lateral side of the integrated pipe.

[0020] The integrated pipe and the coolant discharge pipe can be connected by welding.

[0021] The solder bead portion may be disposed at the connecting end of the coolant discharge pipe and have a connecting surface, the connecting surface having a shape that is in close contact with the outer peripheral surface of the integrated pipe.

[0022] At least one protruding portion may be provided on the integrated tube and protrude in a ring shape along the outer peripheral surface of the integrated tube.

[0023] The heat exchanger may further include a fixing structure configured to fix the branch pipe.

[0024] One end of the fixing structure can be fixed to the coolant discharge pipe, and the other end of the fixing structure can be fixed to the core.

[0025] The coolant discharge pipe may include a bent portion that extends from the core and bends toward the first branch pipe and the second branch pipe. One end of the fixing structure may be fixed to a point on the coolant discharge pipe, and the other end of the fixing structure may be fixed to another point on the coolant discharge pipe. The bent portion may be positioned between the one point and the other point.

[0026] At least one of the fixed structure's ends may surround the outer peripheral surface of the coolant discharge pipe.

[0027] The branch tube can be positioned upwards from the core.

[0028] The core may include a condensation region and a subcooling region for the refrigerant, and the heat exchanger may also include a gas-liquid separator disposed on one side of the core.

[0029] The core can be configured such that multiple plates on which coolant advances and multiple plates on which coolant flows are stacked alternately for heat exchange.

[0030] Beneficial effects

[0031] According to the present invention, the branch pipe is arranged adjacent to the coolant discharge port, which enables the entire heat exchange system to be miniaturized and improves packageability. Attached Figure Description

[0032] Figure 1 This is a diagram illustrating a liquid-cooled condenser in the relevant art.

[0033] Figure 2 This is a diagram illustrating an example heat exchanger according to the present invention.

[0034] Figure 3 yes Figure 2 An exploded 3D diagram.

[0035] Figure 4 and Figure 5 This is a diagram illustrating a branch pipe according to an example of the present invention.

[0036] Figure 6 This is a top plan view of a branch pipe according to an example of the present invention.

[0037] Figure 7 yes Figure 6 Cross-sectional view.

[0038] Figure 8 This is a diagram illustrating a welding process according to an example of the present invention.

[0039] Figure 9 This is a diagram illustrating an example of a fixed structure according to the present invention.

[0040] Figure 10 This is a diagram illustrating a fixed structure according to another example of the invention. Detailed Implementation

[0041] The invention will be described below with reference to the accompanying drawings.

[0042] Figure 2 This is a diagram illustrating an example heat exchanger according to the present invention, and Figure 3 yes Figure 2 An exploded perspective view. The heat exchanger 10 includes: a core 100 in which heat exchange occurs between a refrigerant and a coolant; a coolant inlet port 110A and a coolant outlet port 110B through which coolant is introduced and discharged; and a refrigerant inlet port 120A and a refrigerant outlet port 120B through which refrigerant is introduced and discharged. The heat exchanger 10 may also include a gas-liquid separator 200.

[0043] The core 100 is a component in which refrigerant and coolant flow and exchange heat with each other. As described in the background section, the core 100 may have a structure formed, for example, by alternately stacking multiple plates on which coolant and refrigerant flow. In this structure, the core 100 may include a condensation region and a subcooling region for the refrigerant.

[0044] The coolant inlet port 110A can be located on one side of the core, for example, the lower right side of the core according to the attached drawing, so that coolant can be introduced into the core from the outside. The coolant outlet port 110B can be located on the other side of the core, for example, the upper right side of the core according to the attached drawing, so that coolant can be discharged to the outside. As described below, the branch pipe 300 can be arranged adjacent to the coolant inlet port 110A, and the general coolant outlet pipe can be arranged adjacent to the coolant outlet port 110B.

[0045] at the same time, Figure 2The heat exchanger shown is a double-sided heat exchanger and has a structure in which a first core 100-1 through which coolant circulates through a first coolant path flows and a second core 100-2 through which coolant circulates through a second coolant path are stacked in a left / right direction based on the figures (it is also generally described as stacked in an up / down direction based on the cores). Two pipes located on the left side, based on the figures, can correspond to a second coolant inlet pipe 110A-2 and a second coolant outlet pipe 110B-2, through which coolant circulating through the second coolant path is introduced and discharged. However, of course, the following features of the invention can be applied to integrated heat exchangers in which the first and second coolant paths are integrated, or, as needed, heat exchangers having multiple single cores installed in a single coolant path, as well as the double-sided heat exchanger shown.

[0046] The gas-liquid separator 200 can be disposed on one side of the core and is used to separate liquid refrigerant and gaseous refrigerant from refrigerant in which liquid refrigerant and gaseous refrigerant are mixed. The gas-liquid separator 200 can have a structure that is brazed to one side of the core (e.g., the left side of the core).

[0047] The refrigerant inlet port 120A can be located on one side of the core, for example, the lower right side of the core according to the attached drawing, so that refrigerant can be introduced into the core from the outside. The refrigerant discharge port 120B can be located on one side of the gas-liquid separator, for example, the lower side of the gas-liquid separator according to the attached drawing, so that refrigerant can be discharged to the outside.

[0048] In the heat exchanger 10, the present invention may have a branch pipe 300 disposed adjacent to the coolant discharge port 110B, and configured to distribute the coolant discharged from the coolant discharge port 110B to different paths. Because the branch pipe is installed adjacent to the coolant discharge port, the coolant that has already undergone heat exchange in the core and has been discharged can flow to the appropriate path. In this case, unlike related technologies, the branch pipe or valve does not need to be installed in a location separately from the heat exchanger. Therefore, the number of additional components can be reduced, the entire heat exchange system can be miniaturized, and the packageability of the heat exchanger can be improved.

[0049] The branch tube of the present invention will be described in more detail below. Figure 4 and Figure 5This is a diagram illustrating a branch pipe according to an example of the invention. The branch pipe 300 may have: a coolant discharge pipe 303 connected to a coolant discharge port 110B, and configured such that coolant discharged from the coolant discharge port is introduced into the coolant discharge pipe 303; and a first branch pipe 301 and a second branch pipe 302 branching from the coolant discharge pipe 303 in a first direction and a second direction, respectively. That is, as shown, the branch pipe 300 has a T-shaped shape. The left portion of the drawing may correspond to the first branch pipe 301 based on the branch point, the right portion may correspond to the second branch pipe 302, and the lower portion may correspond to the coolant discharge pipe 303. However, the shape of the branch pipe is not limited to this. The branch pipe may have a Y-shape or various shapes, such as one or more branch pipes branching from a main pipe. In this case, the coolant discharge pipe 303 may be arranged downwards in the direction of gravity from the first branch pipe 301 and the second branch pipe 302.

[0050] In this configuration, the first branch pipe 301 can deliver coolant to the first coolant path, and the second branch pipe 302 can deliver coolant to the second coolant path. In this configuration, the first coolant path can be a path through which the coolant is cooled, and the second coolant path can be a path through which the coolant is heated. That is, as described above, because the heat exchanger needs to condense the refrigerant during the vehicle cooling process, the radiator that exchanges heat with the outside air can cool the coolant to provide a relatively low temperature coolant. In this configuration, the coolant path can correspond to the first coolant path in this invention. Furthermore, because the heat exchanger needs to heat the refrigerant during the vehicle heating process, the coolant can be heated by the waste heat from the PE components (electrical components) to provide a relatively high temperature coolant. In this configuration, the path can correspond to the second coolant path in this invention. Coolant discharged to the first coolant path can pass through a low-temperature radiator (LTR) positioned adjacent to the battery lines, and coolant discharged to the second coolant path can pass through a high-temperature radiator (HTR) positioned adjacent to the lines of the PE components (e.g., motor, inverter, etc.).

[0051] In this case, in the present invention, the outer diameter 301_D of the first branch pipe 301 can be equal to or greater than the outer diameter 302_D of the second branch pipe 302. During the cooling process, i.e., when the coolant flows through the first branch pipe 301 into the first coolant path, the coolant flow rate is high, while during the heating process, i.e., when the coolant flows through the second branch pipe 302 into the second coolant path, the coolant flow rate is relatively low because the coolant viscosity is low or the cooling load of the PE component is low. Therefore, the outer diameter of the first branch pipe 301 can be equal to or greater than the outer diameter of the second branch pipe 302. More specifically, the outer diameter of the outlet end of the first branch pipe 301 can be equal to or greater than the outer diameter of the outlet end of the second branch pipe 302. For this purpose, the outer diameter can gradually increase from the outlet end of the second branch pipe 302 towards the outlet end of the first branch pipe 301. Alternatively, the outer diameter changes near the branch point, and in other parts, the outer diameter of the first branch pipe 301 can be equal to or greater than the outer diameter of the second branch pipe 302.

[0052] Figure 6 This is a top plan view of a branch pipe according to an example of the present invention. Figure 7 yes Figure 6 The cross-sectional view is shown. As shown, the branch pipe can have a T-shape. In this case, the first branch pipe 301 and the second branch pipe 302 can form an integrated pipe 304, and the end of the coolant discharge pipe 303 can be connected to the middle part of the transverse side of the integrated pipe 304.

[0053] In this configuration, the integrated pipe 304 and the coolant drain pipe 303 can be connected to each other by welding. That is, both the integrated pipe 304 and the coolant drain pipe 303 can be constructed as extruded pipes. The T-shaped branch pipe 300 can be manufactured by fixing and welding the coolant drain pipe 303 to the middle portion of the transverse side of the integrated pipe 304.

[0054] As described above, the branch pipe 300 of the present invention can be manufactured by welding and connecting the integrated pipe 304 and the coolant discharge pipe 303. For this purpose, as... Figure 5 As shown, the weld bead portion 310 can be disposed at the connecting end of the coolant discharge pipe 303 and has a connecting surface that is in close contact with the outer peripheral surface of the integrated pipe 304. That is, the weld bead portion 310 can have a saddle shape and be in close contact with the integrated pipe 304, which makes it easy to fix the position of the coolant discharge pipe 303. In addition, the welded portion is formed to be thicker than other portions, which achieves strong welding and helps to increase the connection force between the two components.

[0055] Figure 8This is a diagram illustrating the welding process according to an example of the invention. As shown, the integrated tube 304 can be positioned vertically such that the longitudinal direction of the integrated tube 304 is parallel to the direction of gravity. The lateral side of the integrated tube 304 can be fixed to the coolant discharge tube 303, which has an end side arranged in a horizontal direction, and the integrated tube 304 and the coolant discharge tube 303 can be connected by welding. That is, during the process of manufacturing the branch tube, the coolant discharge tube 303 is first fixed to the core 100 by welding or the like, and then the integrated tube 304 can be connected to the open end of the coolant discharge tube 303 by welding. In this case, as described below, the coolant discharge tube 303 can have a shape that bends towards the upper side of the core 100, such that the branch tube 300 is positioned upward from the core 100. Therefore, the end side of the coolant discharge tube 303 can be arranged horizontally in the state where the heat exchanger 10 is lying flat. Welding can be performed after the integrated tube 304 is vertically positioned and fixed to the horizontal end side of the coolant discharge tube 303.

[0056] In this case, during the welding process, welding material generated by the weld bead portion 310 can flow downwards along the integrated tube 304 by gravity, which may lead to contamination. To prevent this problem, one or more protrusions 320 can be provided on the integrated tube 304 and protrude in an annular shape along the outer peripheral surface of the integrated tube 304. Therefore, contamination caused by welding material can be prevented. In this case, for ease of manufacturing, the protrusions 320 can be respectively provided on the first branch tube 301 and the second branch tube 302. Two or more protrusions can be respectively provided on the first branch tube 301 and the second branch tube 302.

[0057] Unlike the previous example where extruded tubes were welded together to form branch pipes, the branch pipe 300 according to another embodiment of the invention can be configured such that a first branch pipe 301, a second branch pipe 302, and a coolant discharge pipe 303 are integrated. That is, the branch pipe can be manufactured as a single product in which all components are integrated by injection molding or the like. The heat exchanger can be manufactured by attaching the branch pipe, manufactured as a single product, to the coolant discharge port of the core.

[0058] The fixing structure of the present invention will now be described. Figure 9 This is a diagram illustrating a fixed structure according to an example of the invention. Figure 10 This is a diagram illustrating a fixing structure according to another example of the invention. As shown, the heat exchanger of the invention may further include a fixing structure 400 for fixing the branch pipe 300.

[0059] like Figure 9As shown, according to an example of the fixing structure 400 of the present invention, one end 400A of the fixing structure 400 can be fixed to the coolant discharge pipe 303, and the other end 400B of the fixing structure 400 can be fixed to the core 100. Since one side and the other side of the fixing structure are respectively fixed to the coolant discharge pipe and the core constituting the branch pipe as described above, the connection force between the branch pipe and the core can be increased.

[0060] like Figure 10 As shown, in another example of the fixing structure 400 according to the invention, both one end 400A and the other end 400B of the fixing structure 400 can be fixed to the coolant discharge pipe 303. That is, one end of the fixing structure 400 can be fixed to a point on the coolant discharge pipe 303, and the other end of the fixing structure 400 can be fixed to another point on the coolant discharge pipe 303. As described above, when the coolant discharge pipe 303 bends at its midpoint, the coolant discharge pipe 303 may include a bent portion C. The lower portion of the bent portion C may be parallel to the ground, and the upper portion of the bent portion C may be configured to be perpendicular to the ground. In this case, one end 400A of the fixing structure 400 can be fixed to the lower portion of the bent portion C as the midpoint, and the other end 400B of the fixing structure 400 can be fixed to the upper portion of the bent portion C as the midpoint. This helps to improve the durability of the coolant discharge pipe because the fixing structure disperses the stress concentrated on the bent portion of the coolant discharge pipe when the coolant flows.

[0061] Furthermore, although not shown separately, the fixing structure can of course be constructed by combining the above-described structures of the two examples, namely, by fixing the first and second sides of the fixing structure to the coolant discharge pipe and fixing the third side of the fixing structure to the core.

[0062] In addition, such as Figure 9 and Figure 10 As shown, the fixing structure 400 can be formed as an elongated plate, and at least one end of the fixing structure 400 can be formed to surround the outer peripheral surface of the coolant discharge pipe 303. Because the fixing structure is formed as a plate, the contact area between the fixing structure and the fixing target (i.e., the coolant discharge pipe or core) can be increased, and the fixing force can be increased. Because the fixing structure is constructed to surround the outer peripheral surface of the coolant discharge pipe, the connection force between the coolant discharge pipe and the fixing structure can be increased, and the two components can be connected without a separate welding process.

[0063] Meanwhile, in the heat exchanger 10 of the present invention, the branch pipe 300 can be positioned upward from the core 100. That is, return to reference. Figure 2The branch pipe 300, and more specifically the branch points on the branch pipe 300, namely the first branch pipe 301 and the second branch pipe 302, can be positioned above the core 100 based on the ground. Because the branch pipes are positioned on the upper side when the heat exchanger is installed in the vehicle, the operator can easily access the branch pipes when performing the operation of venting air from the core.

[0064] Although embodiments of the invention have been described with reference to the accompanying drawings, those skilled in the art will understand that the invention may be practiced in any other specific form without altering its technical spirit or essential characteristics. Therefore, it should be understood that the above embodiments are illustrative in all respects and do not limit the invention.

[0065] [Description of reference numerals in the attached figures]

[0066] 10: Heat exchanger

[0067] 100: Core

[0068] 110A: Coolant inlet port

[0069] 110B: Coolant vent port

[0070] 120A: Refrigerant inlet port

[0071] 120B: Refrigerant discharge port

[0072] 200: Gas-liquid separator

[0073] 300: Branch pipe

[0074] 301: First branch pipe

[0075] 302: Second branch pipe

[0076] 303: Coolant drain pipe

[0077] 304: Integrated tube

[0078] 400: Fixed structure

Claims

1. A heat exchanger, the heat exchanger comprising: The core, in which heat exchange occurs between the refrigerant and the coolant; A refrigerant inlet port through which refrigerant is introduced into the core; A refrigerant discharge port through which refrigerant is discharged from the core; Coolant inlet port, through which coolant is introduced into the core; A coolant discharge port through which coolant is discharged from the core; as well as A branch pipe, configured to be adjacent to the coolant discharge port and to distribute coolant along different paths. The branch pipe includes: Coolant discharge pipe, through which coolant is introduced from the coolant discharge port; and A first branch pipe and a second branch pipe, which branch off from the coolant discharge pipe. The coolant discharge pipe is arranged downwards from the first branch pipe and the second branch pipe in the direction of gravity, and The branch pipe has a structure in which the first branch pipe and the second branch pipe form an integrated pipe, and the end of the coolant discharge pipe is connected to the middle part of the transverse side of the integrated pipe.

2. The heat exchanger according to claim 1, wherein, The first branch pipe delivers coolant to a first coolant path, and the second branch pipe delivers coolant to a second coolant path, wherein the first coolant path is the path in which the coolant is cooled, and the second coolant path is the path in which the coolant is heated.

3. The heat exchanger according to claim 2, wherein, The coolant that has moved to the first branch pipe moves toward a path through a radiator configured to exchange heat with the outside air to lower the temperature of the coolant, and the coolant that has moved to the second branch pipe is heated by waste heat from electrical components that have a relatively higher temperature than the coolant.

4. The heat exchanger according to claim 2, wherein, The outer diameter of the first branch pipe is equal to or greater than the outer diameter of the second branch pipe.

5. The heat exchanger according to claim 1, wherein, The integrated pipe and the coolant discharge pipe are connected by welding.

6. The heat exchanger according to claim 1, wherein, The solder ball portion is disposed at the connecting end of the coolant discharge pipe and has a connecting surface, the connecting surface having a shape that is in close contact with the outer peripheral surface of the integrated pipe.

7. The heat exchanger according to claim 1, wherein, At least one protruding portion is provided on the integrated tube and protrudes in a ring shape along the outer peripheral surface of the integrated tube.

8. The heat exchanger according to claim 1, further comprising: A fixing structure is configured to fix the branch pipe.

9. The heat exchanger according to claim 8, wherein, One end of the fixing structure is fixed to the coolant discharge pipe, and the other end of the fixing structure is fixed to the core.

10. The heat exchanger according to claim 8, wherein, The coolant discharge pipe includes a bent portion that extends from the core and bends toward the first branch pipe and the second branch pipe. Wherein, one end of the fixing structure is fixed to a point on the coolant discharge pipe, the other end of the fixing structure is fixed to another point on the coolant discharge pipe, and the bent portion is positioned between the one point and the other point.

11. The heat exchanger according to claim 8, wherein, At least one of the fixed structure's ends surrounds the outer peripheral surface of the coolant discharge pipe.

12. The heat exchanger according to claim 1, wherein, The branch tube is positioned upwards from the core.

13. The heat exchanger according to claim 1, wherein, The core includes a condensation region and a subcooling region for the refrigerant, and the heat exchanger further includes a gas-liquid separator disposed on one side of the core.

14. The heat exchanger according to claim 1, wherein, The core is configured such that multiple plates on which coolant advances and multiple plates on which coolant flows are stacked alternately for heat exchange.

Images