Plate heat exchanger

Abstract

A plate heat exchanger is disclosed. The plate heat exchanger includes: a housing; the plate stack is arranged in the shell and is formed by stacking a plurality of plates; the plate stack comprises an inlet and outlet through hole which is formed in the plate stack and is communicated with the shell; and a moving through-hole formed inside the stack and spaced apart from the access through-hole by a predetermined distance, in which the access through-hole and the moving through-hole are formed at positions offset from each other when viewed in the vertical direction.

Description

Technical Field

[0001] The present invention relates to a plate heat exchanger, and more specifically, to a plate heat exchanger having improved heat exchange efficiency between two fluids flowing therein. Background Technology

[0002] Generally, in equipment such as air conditioning, cooling systems and heat pump systems, plate heat exchangers are used to heat or cool a target fluid by transferring heat between one fluid (hereinafter referred to as "first fluid") and another fluid with a different temperature (hereinafter referred to as "second fluid").

[0003] A plate heat exchanger is a device configured to exchange heat between a first fluid and a second fluid at different temperatures via stacked plates (heat transfer plates), which allows the first fluid and the second fluid to move through separate flow channels with the stacked plates inserted between them.

[0004] However, in a typical plate heat exchanger, there is a problem where the first fluid moving through a first fluid flow channel formed in the stacked plates is directed into the space between a pair of through holes, while the second fluid moving through a second fluid flow channel formed in the stacked plates is directed into the regions in front of and behind the pair of through holes because its movement path is restricted by the pair of through holes. This results in a reduction in the intersection area between the movement paths of the first and second fluids, thereby reducing the heat exchange efficiency.

[0005] Therefore, there is a need for a plate heat exchanger configured to increase the contact area between the two fluids undergoing heat exchange, thereby improving the heat exchange efficiency between the two fluids. Summary of the Invention

[0006] Technical issues

[0007] One object of the present invention is to provide a plate heat exchanger that can improve the heat exchange efficiency between two fluids.

[0008] Another object of the present invention is to provide a plate heat exchanger capable of increasing the cross-region between the movement paths of the two fluids in which heat exchange occurs.

[0009] A further object of the present invention is to provide a plate heat exchanger that can ensure consistent flow rate and consistent hydraulic pressure of two fluids moving through it while preventing fluid stagnation.

[0010] Another object of the present invention is to provide a plate heat exchanger with improved heat exchange efficiency, which can be achieved with minimal modifications to existing plate heat exchanger designs.

[0011] Technical means

[0012] According to one aspect of the invention, a plate heat exchanger includes a housing and a plate stack. The plate stack may be disposed inside the housing. The plate stack can be formed by stacking multiple plates. The plate stack includes inlet / outlet through-holes and movable through-holes. The inlet / outlet through-holes are formed inside the plate stack. The inlet / outlet through-holes communicate with the housing. The movable through-holes are formed inside the plate stack. The movable through-holes are spaced a predetermined distance from the inlet / outlet through-holes. When viewed in the vertical direction, the inlet / outlet through-holes and the movable through-holes are formed at positions offset from each other.

[0013] Specifically, the plate stack may include a first plate stack and a second plate stack. The first plate stack may be disposed on one side inside the housing. The second plate stack may be disposed on the other side inside the housing. One end of the second plate stack may be in surface contact with one end of the first plate stack.

[0014] The inlet / outlet through-holes may include: a first through-hole and a second through-hole. The first through-hole may be formed inside the first plate stack. The second through-hole may be formed inside the second plate stack.

[0015] The movable through-hole may include a third through-hole, a fourth through-hole, a fifth through-hole, and a sixth through-hole. The third through-hole may be formed below the first through-hole, spaced diagonally at a predetermined distance from the first through-hole in one direction. The fourth through-hole may be formed below the first through-hole, spaced diagonally at a predetermined distance from the first through-hole in another direction. The fifth through-hole may be formed below the second through-hole, spaced diagonally at a predetermined distance from the second through-hole in one direction. The sixth through-hole may be formed below the second through-hole, spaced diagonally at a predetermined distance from the second through-hole in another direction.

[0016] For example, a movable through-hole can have a smaller diameter than an inlet / outlet through-hole.

[0017] A first fluid can move through a first fluid flow channel formed in the plate stack. A second fluid having a different temperature from the first fluid can move through a second fluid flow channel formed in the plate stack.

[0018] Specifically, the first fluid introduced into the plate stack can move through a first fluid flow channel extending from the interior of the inlet / outlet through-hole to the interior of the moving through-hole, and then can move through the first fluid flow channel extending from the interior of the moving through-hole to the interior of the inlet / outlet through-hole to be discharged from the plate stack.

[0019] Furthermore, the second fluid introduced into the plate stack can move through a second fluid flow channel extending from the outside of the moving through hole to the outside of the inlet and outlet through hole, and then be discharged from the plate stack through the second fluid flow channel extending from the outside of the inlet and outlet through hole to the outside of the moving through hole.

[0020] Beneficial effects

[0021] Embodiments of the present invention provide a plate heat exchanger, comprising: a housing; and a plate stack disposed inside the housing and formed by stacking a plurality of plates, wherein the plate stack includes: inlet and outlet through-holes formed inside the plate stack and communicating with the housing; and movable through-holes formed inside the plate stack and spaced at a predetermined distance from the inlet and outlet through-holes, wherein the inlet and outlet through-holes and the movable through-holes are formed at positions offset from each other when viewed in the vertical direction. This configuration can increase the contact area between a first fluid flow channel and a second fluid flow channel by setting the movable through-holes to be inclined relative to the inlet and outlet through-holes.

[0022] In the plate heat exchanger according to the invention, the plate stack may include: a first plate stack disposed on one side inside the housing; and a second plate stack disposed on the other side inside the housing and having one end in surface contact with one end of the first plate stack. This configuration can improve the heat exchange efficiency between the two fluids by varying the shape of the plate stack, while minimizing modifications to existing housing designs.

[0023] In the plate heat exchanger according to the invention, the inlet and outlet through-holes may include: a first through-hole formed on the upper part of a first plate stack; and a second through-hole formed inside a second plate stack. This configuration ensures that a first fluid is introduced into the first through-hole, moves through a first fluid flow channel formed in the plate stack, and then exits from the second through-hole.

[0024] In the plate heat exchanger according to the invention, the movable through-hole may include: a third through-hole formed below the first through-hole and diagonally spaced at a predetermined distance from the first through-hole in one direction; a fourth through-hole formed below the first through-hole and diagonally spaced at a predetermined distance from the first through-hole in another direction; a fifth through-hole formed below the second through-hole and diagonally spaced at a predetermined distance from the second through-hole in one direction; and a sixth through-hole formed below the second through-hole and diagonally spaced at a predetermined distance from the second through-hole in another direction. This configuration can increase the intersection area between the movement path of the first fluid moving through the first fluid flow channel of the plate stack and the movement path of the second fluid moving through the second fluid flow channel.

[0025] In the plate heat exchanger according to the invention, the movable through-holes can have a smaller diameter than the inlet and outlet through-holes. This configuration ensures that the velocity of the first fluid flowing inside the inlet and outlet through-holes remains equal to the velocity of the first fluid flowing inside the movable through-holes, and the number of movable through-holes is greater than the number of inlet and outlet through-holes, thereby preventing the first fluid from stagnating as it moves through the plate stack.

[0026] In the plate heat exchanger according to the invention, a first fluid can move through a first fluid flow channel formed in the plate stack, and a second fluid having a different temperature from the first fluid can move through a second fluid flow channel formed in the plate stack. This configuration ensures that heat exchange can occur between the first and second fluids through the plate stack when the first and second fluids move together with the plate stack inserted therebetween.

[0027] In the plate heat exchanger according to the invention, the first fluid introduced into the plate stack can move through a first fluid flow channel extending from the interior of the inlet / outlet through-hole to the interior of the moving through-hole, and then can be discharged from the plate stack by moving through the first fluid flow channel extending from the interior of the moving through-hole to the interior of the inlet / outlet through-hole. Since the movement path of the first fluid is formed as described above, the intersection area between the movement paths of the two fluids can be increased with minimal modification to the existing shell design.

[0028] In the plate heat exchanger according to the invention, a second fluid introduced into the plate stack can move through a second fluid flow channel extending from the outside of the moving through-hole to the outside of the inlet and outlet through-holes, and then be discharged from the plate stack by moving through the second fluid flow channel extending from the outside of the inlet and outlet through-holes to the outside of the moving through-hole. Since the movement path of the second fluid is formed as described above, the intersection area between the movement paths of the two fluids can be increased with minimal modification to the existing shell design. Attached Figure Description

[0029] Figure 1 This is a three-dimensional cross-sectional view of a typical plate heat exchanger.

[0030] Figure 2 This is a three-dimensional cross-sectional view of a plate heat exchanger according to an embodiment of the present invention.

[0031] Figure 3 It is along Figure 2 The transverse cross-sectional view obtained from the VV line shows the operating state of the plate heat exchanger.

[0032] Figure 4 This is an exploded perspective view of a plate heat exchanger stack according to an embodiment of the present invention.

[0033] Figure 5a This is a longitudinal cross-sectional view showing the movement paths of the first and second fluids through flow channels formed in a typical plate stack.

[0034] Figure 5b This is a longitudinal cross-sectional view showing the movement paths of a first fluid and a second fluid through a flow channel formed in a first plate stack according to an embodiment of the present invention.

[0035] Figure 5cThis is a longitudinal cross-sectional view showing the movement paths of a first fluid and a second fluid through a flow channel formed in a second plate stack according to an embodiment of the present invention.

[0036] Figure 6a This is a longitudinal cross-sectional view showing the movement paths of the first fluid and the second fluid through a flow channel formed in the first plate stack according to another embodiment.

[0037] Figure 6b This is a longitudinal cross-sectional view showing the movement paths of the first fluid and the second fluid through a flow channel formed in the second plate stack according to another embodiment. Detailed Implementation

[0038] The above and other aspects, features and advantages of the present invention will become apparent from the following detailed description of embodiments and in conjunction with the accompanying drawings.

[0039] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that throughout the specification and drawings, the same components will be indicated by the same reference numerals.

[0040] Here, the longitudinal direction of the outer casing refers to the direction parallel to the ground on which the outer casing is placed.

[0041] Here, the circumferential direction of the outer shell refers to the direction extending along the periphery of the outer shell.

[0042] Here, the radial direction of the outer casing refers to the direction extending from the center inside the casing toward the outer periphery.

[0043] Here, cross section refers to the section obtained along a direction parallel to the longitudinal direction of the shell.

[0044] Here, the longitudinal section refers to the section taken in a direction perpendicular to the longitudinal direction of the shell.

[0045] Here, the first fluid refers to a specific fluid, and the second fluid refers to another fluid with a different temperature than the first fluid.

[0046] Figure 1 This is a three-dimensional cross-sectional view of a typical plate heat exchanger.

[0047] Reference Figure 1A typical plate heat exchanger (10) may have a structure in which a plate stack (200) is integrally formed inside a housing (100). Furthermore, the plate heat exchanger (10) may include a pair of through-holes formed respectively at the upper and lower portions of the plate stack (200), wherein the pair of through-holes extends in the front-rear direction through the center of the plate stack (200). Therefore, a first fluid moving through a first fluid flow channel formed in the plate stack (200) is directed towards the center of the plate stack (200) in the front-rear direction through the through-holes, while a second fluid moving through a second fluid flow channel formed in the plate stack (200) is directed towards the front or rear portion of the plate stack (200) because its movement path is restricted by the through-holes. However, this configuration results in reduced heat exchange efficiency due to the reduced area where the respective movement paths of the first and second fluids intersect.

[0048] Figure 2 This is a three-dimensional cross-sectional view of a plate heat exchanger according to an embodiment of the present invention. Figure 3 It is along Figure 2 The cross-sectional view obtained from the center line VV shows the operating status of the plate heat exchanger.

[0049] Reference Figure 2 and Figure 3 The plate heat exchanger (10) according to this embodiment may include a housing (100) and a plate stack (200). A first fluid (20) can move through a first fluid flow channel formed in the plate stack (200). A second fluid (30) having a different temperature from the first fluid (20) can move through a second fluid flow channel formed in the plate stack (200). Therefore, when the first fluid (20) and the second fluid (30) introduced into the housing (100) move through their respective flow channels in the plate stack (200), heat can be transferred from the higher-temperature fluid to the lower-temperature fluid. As a result, heat exchange can occur between the first fluid (20) and the second fluid (30).

[0050] Reference Figure 2 and Figure 3 According to this embodiment, the housing (100) may be provided with channels for the first fluid (20) and the second fluid (30) to enter or leave the plate heat exchanger (10). The housing (100) may accommodate the plate stack (200).

[0051] The housing (100) may include a housing (110), connecting members (120), and a housing support (130). The connecting members (120) may be formed on both sides of the housing (110). The housing support (130) may be formed on the lower part of the housing (110).

[0052] The housing (110) can accommodate the plate stack (200). The housing (110) can be formed of a material that is rigid, heat-resistant and corrosion-resistant.

[0053] Connecting components (120) may be formed on both sides of the housing (110). The connecting components (120) may provide channels for the introduction of a first fluid (20) and a second fluid (30) into or out of the housing (110). Given the movement of high-temperature, high-pressure fluids within the connecting components (120), the connecting components (120) may be formed of a material possessing rigidity, heat resistance, and corrosion resistance. The connecting components (120) may include a first connector (121), a second connector (122), a third connector (123), and a fourth connector (124).

[0054] A first connector (121) may be formed on the upper part of one side of the housing (110). The first connector (121) may extend through one end of the housing (110). A second connector (122) may be formed on the upper part of the other side of the housing (110). The second connector (122) may extend through the other end of the housing (110). A third connector (123) may be formed on the lower part of that side of the housing (110). The third connector (123) may extend through that end of the housing (110). A fourth connector (124) may be formed on the lower part of the other side of the housing (110). The fourth connector (124) may extend through the other end of the housing (110).

[0055] The first connector (121) and the second connector (122) provide channels for the first fluid (20) to enter or leave the plate heat exchanger. The third connector (123) and the fourth connector (124) provide channels for the second fluid (30) to enter or leave the plate heat exchanger.

[0056] It should be understood that the present invention is not limited to the above figures or descriptions. These are merely exemplary and are not intended to limit the scope of the invention.

[0057] Figure 4 This is an exploded perspective view of the plate stack of the plate heat exchanger according to this embodiment.

[0058] Reference Figures 2 to 4 According to this embodiment, the plate stack (200) can be disposed inside the housing (100). The plate stack (200) can be formed by stacking multiple plates (230). Therefore, a first fluid (20) and a second fluid (30) with different temperatures can exchange heat with each other through the plates (230) forming the plate stack (200).

[0059] The plate stack (200) may include a first plate stack (210) and a second plate stack (220). A first fluid (20) and a second fluid (30) can move through the first plate stack (210) and the second plate stack (220) arranged in a symmetrical structure. This configuration allows the first fluid (20) and the second fluid (30) to be introduced and discharged through connecting parts formed in a typical housing (100), regardless of their movement path within the plate stack (200).

[0060] The first plate stack (210) may be disposed on one side inside the housing (100). The first fluid (20) may move through a first fluid flow channel formed in the first plate stack (210). The second fluid (30) may move through a second fluid flow channel formed in the first plate stack (210).

[0061] The second plate stack (220) may be disposed on the other side inside the housing (100). One end of the second plate stack (220) may be in surface contact with one end of the first plate stack (210). The first fluid (20) may move through a first fluid flow channel formed in the second plate stack (220). The second fluid (30) may move through a second fluid flow channel formed in the second plate stack (220).

[0062] The first plate stack (210) and the second plate stack (220) can be formed by stacking plates (230) along the longitudinal direction of the housing (100). The plates (230) can be formed of a thermally conductive material to allow heat exchange between the first fluid (20) and the second fluid (30). Therefore, the first fluid (20) and the second fluid (30) can exchange heat with each other through the plates (230).

[0063] It should be understood that the present invention is not limited to the above figures or descriptions. These are merely exemplary and are not intended to limit the scope of the invention.

[0064] Reference Figures 2 to 4 The plate stack (200) according to this embodiment may include inlet / outlet through-holes (300) and movable through-holes (400). Thus, a first fluid (20) introduced into the plate stack (200) through the inlet / outlet through-holes (300) can move to the movable through-holes (400) to pass through them, and then can move back to the inlet / outlet through-holes (300) to exit from the plate stack (200). This configuration allows for an increased contact area between the first and second fluid flow channels while maintaining full compatibility with a typical housing (100) without any design changes.

[0065] It should be understood that the present invention is not limited to the above figures or descriptions. These are merely exemplary and are not intended to limit the scope of the invention.

[0066] Reference Figures 2 to 4Inlet / outlet through-holes (300) may be formed inside the plate stack (200). Therefore, the first fluid (20) can move into the inlet / outlet through-holes (300). The inlet / outlet through-holes (300) may include a first through-hole (310), a first barrier (320), a second through-hole (330), and a second barrier (340).

[0067] A first through-hole (310) may be formed inside the first plate stack (210). Therefore, the first fluid (20) can move into the first through-hole (310) after being introduced into the plate stack (200).

[0068] A first barrier (320) may be disposed inside the first through-hole (310). The first barrier (320) may prevent further movement of the first fluid (20) inside the first through-hole (310). This configuration ensures that the first fluid (20) introduced into the first plate stack (210) can move to the moving through-hole (400) through the first fluid flow channel formed in the first plate stack (210), rather than moving to the second plate stack (220) through the first through-hole (310).

[0069] A second through-hole (330) may be formed inside the second plate stack (220). Therefore, the first fluid (20) can move into the second through-hole (330) before being discharged from the plate stack (200).

[0070] A second barrier (340) may be disposed inside the second through-hole (330). The second barrier (340) may prevent further movement of the first fluid (20) inside the second through-hole (330). This configuration ensures that the first fluid (20) can move from the first plate stack (210) to the second plate stack (220) through the movable through-hole (400), rather than through the second through-hole (330).

[0071] It should be understood that the present invention is not limited to the above figures or descriptions. These are merely exemplary and are not intended to limit the scope of the invention.

[0072] Reference Figures 2 to 4 According to this embodiment, a movable through-hole (400) may be formed inside the plate stack (200). The movable through-hole (400) may be spaced a predetermined distance from the inlet / outlet through-hole (300). The inlet / outlet through-hole (300) and the movable through-hole (400) may be formed at positions offset from each other when viewed in a vertical direction. This configuration ensures that a first fluid (20) introduced from the outside into the inlet / outlet through-hole (300) can move to the movable through-hole (400) to pass through the movable through-hole (400), and then can move back to the inlet / outlet through-hole (300) to be discharged to the outside. The movable through-hole (400) may include a third through-hole (410), a fourth through-hole (420), a fifth through-hole (430), and a sixth through-hole (440).

[0073] A third through-hole (410) may be formed below the first through-hole (310) at a predetermined diagonal distance from the first through-hole (310) in one direction. A fourth through-hole (420) may be formed below the first through-hole (310) at a predetermined diagonal distance from the first through-hole (310) in another direction. This configuration ensures that when the first fluid (20) moves from the inlet / outlet through-hole (300) formed in the first plate stack (210) to the moving through-hole (400), the first fluid (20) can be distributed from the central region to the front and rear regions.

[0074] A fifth through-hole (430) may be formed below the second through-hole (330) at a predetermined diagonal distance from the second through-hole (330) in one direction. A sixth through-hole (440) may be formed below the second through-hole (330) at a predetermined diagonal distance from the second through-hole (330) in another direction. This configuration ensures that when the first fluid (20) moves from the movable through-hole (400) formed in the second plate stack (220) to the inlet / outlet through-hole (300), the first fluid (20) can accumulate from the front and rear regions to the central region.

[0075] The third through hole (410) can communicate with the fifth through hole (430). The fourth through hole (420) can communicate with the sixth through hole (440). Therefore, the first fluid (20) can move from the first plate stack (210) to the second plate stack (220) through the movable through hole (400).

[0076] It should be understood that the present invention is not limited to the above figures or descriptions. These are merely exemplary and are not intended to limit the scope of the invention.

[0077] Figure 5a This is a longitudinal cross-sectional view showing the movement paths of the first and second fluids through flow channels formed in a typical plate stack. Figure 5b This is a longitudinal cross-sectional view showing the movement paths of the first fluid and the second fluid through the flow channels formed in the first plate stack according to this embodiment. Figure 5c It is a longitudinal cross-sectional view showing the movement path of the first fluid and the second fluid through the flow channel formed in the second plate stack according to this embodiment.

[0078] The technical advantages provided by the plate heat exchanger (10) according to this embodiment are as follows.

[0079] Reference Figures 5a to 5c The first fluid (20) introduced into the plate stack (200) can move through a first fluid flow channel extending from the interior of the inlet / outlet through hole (300) to the interior of the moving through hole (400), and then can be discharged from the plate stack (200) through the first fluid flow channel extending from the interior of the moving through hole (400) to the interior of the inlet / outlet through hole (300).

[0080] Furthermore, the second fluid (30) introduced into the plate stack (200) can move through a second fluid flow channel extending from the outside of the movable through hole (400) to the outside of the inlet and outlet through hole (300), and then be discharged from the plate stack (200) through the second fluid flow channel extending from the outside of the inlet and outlet through hole (300) to the outside of the movable through hole (400).

[0081] A first fluid (20) and a second fluid (30) with different temperatures can be introduced into the plate stack (200) through a connecting member (120) formed in the plate heat exchanger (10). When the first fluid (20) moves through a first fluid flow channel formed in the first plate stack (210) and the second fluid (30) moves through a second fluid flow channel formed in the first plate stack (210), the first fluid (20) and the second fluid (30) can exchange heat with each other with the plates (230) of the first plate stack (210) inserted therebetween.

[0082] Furthermore, when the first fluid (20) moves through the first fluid flow channel formed in the second plate stack (220) and the second fluid (30) moves through the second fluid flow channel formed in the second plate stack (220), the first fluid (20) and the second fluid (30) can exchange heat with each other when the plates (230) of the second plate stack (220) are inserted therebetween.

[0083] Reference Figure 1 and Figure 5a A typical plate stack (200) is characterized by a movable through-hole (400) formed directly below the inlet / outlet through-hole (300). Therefore, a first fluid (20) can move from the inlet / outlet through-hole (300) formed at the center of the plate stack (200) in the front-rear direction through a flow channel formed at the center of the plate stack (200) in the front-rear direction to the movable through-hole (400) formed at the center of the plate stack (200) in the front-rear direction. Furthermore, since the movement path of a second fluid (30) is restricted by the inlet / outlet through-hole (300) and the movable through-hole (400) formed at the center of the plate stack (200) in the front-rear direction, the second fluid (30) can move through a flow channel formed at the front or rear of the plate stack (200). This configuration reduces the area where the respective movement paths of the first fluid (20) and the second fluid (30) intersect each other. In a typical plate stack (200), the first fluid (20) can be discharged to the outside through the moving through hole (400) after moving from the inlet / outlet through hole (300).

[0084] Reference Figures 2 to 4 and Figure 5bAccording to this embodiment, the plate heat exchanger (10) is configured such that a first fluid (20) is introduced therein through a first connector (121) and a second fluid (30) is discharged therefrom through a third connector (123). Therefore, the first fluid (20), moving through a first fluid flow channel formed in the first plate stack (210), can be directed from the first through-hole (310) to the lower front and rear regions of the first plate stack to enter the third through-hole (410) or the fourth through-hole (420). Furthermore, the second fluid (30), moving through a second fluid flow channel formed in the first plate stack (210), can be directed from the front and rear regions of the first through-hole (310) to the lower region of the first plate stack to enter the space formed between the third through-hole (410) and the fourth through-hole (420). This configuration allows the creation of fluid intersections (40) in the movement paths of the first fluid (20) and the second fluid (30), thereby increasing the area where the first fluid (20) and the second fluid (30) intersect each other.

[0085] In addition, refer to Figures 2 to 4 and Figure 5c According to this embodiment, the plate heat exchanger (10) is configured such that a first fluid (20) is discharged from it through a second connector (122) and a second fluid (30) is introduced therein through a fourth connector (124). Therefore, the first fluid (20), moving through a first fluid flow channel formed in the second plate stack (220), can be directed from a fifth through-hole (430) or a sixth through-hole (440) to the upper central region of the second plate stack in the front-rear direction to enter the second through-hole (330). Furthermore, the second fluid (30), moving through a second fluid flow channel formed in the second plate stack (220), can be directed from the space formed between the fifth through-hole (430) and the sixth through-hole (440) to the upper region of the second plate stack to enter the front and rear regions of the second through-hole (330). This configuration allows the creation of fluid intersections (40) in the movement paths of the first fluid (20) and the second fluid (30), thereby increasing the area where the first fluid (20) and the second fluid (30) intersect each other.

[0086] It should be understood that the present invention is not limited to the above figures or descriptions. These are merely exemplary and are not intended to limit the scope of the invention.

[0087] Figure 6a This is a longitudinal cross-sectional view showing the movement paths of the first fluid and the second fluid through flow channels formed in the first plate stack according to another embodiment. Figure 6b This is a longitudinal cross-sectional view showing the movement paths of the first fluid and the second fluid through flow channels formed in the second plate stack according to another embodiment.

[0088] Reference Figures 2 to 4 and Figure 6aAccording to another embodiment, the plate heat exchanger (10) is configured such that a first fluid (20) is introduced therein through a first connector (121) and a second fluid (30) is introduced therein through a third connector (123). Therefore, the first fluid (20), moving through a first fluid flow channel formed in the first plate stack (210), can be directed from the first through-hole (310) to the lower front and rear regions of the first plate stack to enter the third through-hole (410) or the fourth through-hole (420). Furthermore, the second fluid (30), moving through a second fluid flow channel formed in the first plate stack (210), can be directed from the space formed between the third through-hole (410) and the fourth through-hole (420) to the upper region of the first plate stack to enter the front and rear regions of the first through-hole (310). This configuration ensures that even when the vertical movement direction of the first fluid (20) through the first fluid flow channel formed in the first plate stack (210) is opposite to the vertical movement direction of the second fluid (30) through the second fluid flow channel formed in the first plate stack (210), a fluid intersection (40) can be created in the movement paths of the first fluid (20) and the second fluid (30), thereby increasing the area where the first fluid (20) and the second fluid (30) intersect each other.

[0089] Reference Figures 2 to 4 and Figure 6b According to this embodiment, the plate heat exchanger (10) is configured such that a first fluid (20) is discharged from it through a second connector (122) and a second fluid (30) is discharged from it through a fourth connector (124). Therefore, the first fluid (20), moving through a first fluid flow channel formed in the second plate stack (220), can be directed from the fifth through-hole (430) or the sixth through-hole (440) to the upper central region of the second plate stack in the front-rear direction. Furthermore, the second fluid (30), moving through a second fluid flow channel formed in the second plate stack (220), can be directed from the front and rear regions of the second through-hole (330) to the lower region of the second plate stack to enter the space formed between the fifth through-hole (430) and the sixth through-hole (440). This configuration ensures that even when the vertical movement direction of the first fluid (20) through the first fluid flow channel formed in the second plate stack (220) is opposite to the vertical movement direction of the second fluid (30) through the second fluid flow channel formed in the second plate stack (220), a fluid intersection (40) can be created in the movement paths of the first fluid (20) and the second fluid (30), thereby increasing the area where the first fluid (20) and the second fluid (30) intersect each other.

[0090] While some embodiments have been described, it will be apparent to those skilled in the art that these embodiments are given by way of example only, and various modifications, variations, alterations, and equivalent embodiments may be made without departing from the spirit and scope of the invention. Therefore, the appended claims and their equivalents are intended to cover such variations or modifications that fall within the scope and spirit of the invention.

Claims

1. A plate heat exchanger, comprising: shell; as well as A plate stack, disposed inside the housing and formed by stacking multiple plates. The plate stack includes: Inlet and outlet through holes are formed inside the plate stack and communicate with the outer shell; as well as A movable through-hole is formed inside the plate stack and spaced at a predetermined distance from the inlet / outlet through-hole. The inlet / outlet through-hole and the movable through-hole are formed at positions offset from each other when viewed in the vertical direction.

2. The plate heat exchanger according to claim 1, wherein the plate stack comprises: The first plate stack is disposed on one side inside the outer casing; as well as The second plate stack is disposed on the other side inside the housing and has one end in surface contact with one end of the first plate stack.

3. The plate heat exchanger according to claim 2, wherein the inlet and outlet through holes comprise: A first through hole is formed inside the first plate stack; as well as A second through hole is formed inside the second plate stack.

4. The plate heat exchanger according to claim 3, wherein the movable through hole comprises: A third through hole is formed below the first through hole, and is diagonally spaced from the first through hole by a predetermined distance in one direction; A fourth through hole is formed below the first through hole, at a predetermined distance diagonally from the first through hole in another direction; A fifth through hole is formed below the second through hole, and is diagonally spaced from the second through hole by a predetermined distance in one direction; and A sixth through hole is formed below the second through hole, and is diagonally spaced from the second through hole by a predetermined distance in another direction.

5. The plate heat exchanger according to claim 1, wherein the movable through-hole has a smaller diameter than the inlet and outlet through-holes.

6. The plate heat exchanger according to claim 1, wherein a first fluid moves through a first fluid flow channel formed in the plate stack, and a second fluid having a different temperature from the first fluid moves through a second fluid flow channel formed in the plate stack.

7. The plate heat exchanger of claim 6, wherein the first fluid introduced into the plate stack moves through a first fluid flow channel extending from the interior of the inlet / outlet through-hole to the interior of the movable through-hole, and moves through the first fluid flow channel extending from the interior of the movable through-hole to the interior of the inlet / outlet through-hole to be discharged from the plate stack.

8. The plate heat exchanger of claim 6, wherein the second fluid introduced into the plate stack moves through a second fluid flow channel extending from the outside of the movable through-hole to the outside of the inlet / outlet through-hole, and moves through the second fluid flow channel extending from the outside of the inlet / outlet through-hole to the outside of the movable through-hole to be discharged from the plate stack.

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