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KR-102964279-B1 - Heat exchanger

KR102964279B1KR 102964279 B1KR102964279 B1KR 102964279B1KR-102964279-B1

Abstract

The present invention relates to a heat exchanger, and the objective of the present invention is to provide a heat exchanger formed to allow two different types of fluids and another type of fluid to exchange heat with each other, that is, consequently, to allow three types of fluids to exchange heat with each other. More specifically, the invention is to provide a heat exchanger formed to allow two types of cooling water and one type of refrigerant with different temperature ranges, such as cooling water for battery cooling and cooling water for motor cooling in an electric vehicle, to exchange heat as a single heat exchanger.

Inventors

  • 최지훈
  • 신성홍

Assignees

  • 한온시스템 주식회사

Dates

Publication Date
20260513
Application Date
20210707
Priority Date
20200710

Claims (20)

  1. In a plate heat exchanger formed by stacking multiple plates, A first plate comprising a first flow section through which a first fluid flows; and a second plate comprising a second flow section partitioned by a partition wall on one side and the other side in the longitudinal direction, through which a second fluid and a third fluid flow while being isolated from each other; comprising The first plate and the second plate are alternately stacked, A first inlet hole and a first discharge hole are formed, through which a first fluid is introduced and discharged, respectively, wherein the first inlet hole and the first discharge hole are spaced apart from each other in the longitudinal direction and are positioned at both ends in the longitudinal direction. A fluid distribution structure is formed that protrudes toward the first flow section on a virtual connecting line of the first inlet hole and the first outlet hole to distribute the flow of the first fluid, wherein A heat exchanger characterized in that the above fluid distribution structure is formed in a shape that separates the flow of the first fluid at the center and directs it toward the longitudinal direction of the first plate so that the flow rate of the first fluid meets the longitudinal portion of the flow of the second and third fluids in the second plate increases.
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  4. In claim 1, the fluid distribution structure is, A heat exchanger characterized by being formed such that the protruding area becomes smaller the closer it is to the first inlet hole or the first outlet hole.
  5. In claim 1, the fluid distribution structure is, A heat exchanger characterized by being formed at a position not corresponding to the bulkhead formed on the second plate.
  6. In claim 4, the fluid distribution structure is, A heat exchanger characterized by a protruding part being formed in a shape including a triangle or an arc.
  7. In claim 1, the heat exchanger is, A heat exchanger characterized in that the first inlet hole and the first outlet hole are positioned in the center in the width direction.
  8. In claim 1, the heat exchanger is, A second inlet hole and a second outlet hole through which a second fluid is introduced and discharged, respectively A third inlet hole and a third outlet hole are formed through which a third fluid is introduced and discharged, respectively, and The second inlet hole and the second outlet hole are spaced apart from each other in the width direction and are positioned at one end in the length direction, A heat exchanger characterized in that the third inlet hole and the third outlet hole are spaced apart from each other in the width direction and are positioned at the other end in the length direction.
  9. In claim 8, the above fluid distribution structure is, It is formed in the center of the first plate, and A heat exchanger characterized by a pair of crescent ribs formed in a crescent shape, with the first inlet hole or the first outlet hole side being an arc and the center side being a straight section, and spaced apart from each other to avoid a position corresponding to the bulkhead formed on the adjacent second plate.
  10. In claim 8, the heat exchanger is, A second guide wall extending longitudinally from one side wall of the second plate is provided to partition the space between the second inlet hole and the second outlet hole of the second plate, and A heat exchanger characterized by having a third guide wall extending longitudinally from the other side wall of the second plate to partition the space between the third inlet hole and the third outlet hole of the second plate.
  11. In claim 1, the heat exchanger is, A second inlet hole and a second outlet hole through which a second fluid is introduced and discharged, respectively A third inlet hole and a third outlet hole are formed through which a third fluid is introduced and discharged, respectively, and The second inlet hole and the second outlet hole are spaced apart from each other in the width direction and are arranged so as to be deflected to one side from the center in the length direction, A heat exchanger characterized in that the third inlet hole and the third outlet hole are spaced apart from each other in the width direction and are arranged so as to be deflected from the center in the length direction toward the other side.
  12. In Clause 11, the above fluid distribution structure is, It is formed adjacent to the first inlet hole or the first outlet hole, A heat exchanger characterized by a pair of triangular ribs formed as a triangle, with the first inlet hole or the first outlet hole side being the vertex and the center side being a straight section.
  13. In Clause 11, the heat exchanger is, A second guide wall extending longitudinally from the partition wall is provided to partition the space between the second inlet hole and the second outlet hole of the second plate, and A heat exchanger characterized by having a third guide wall extending longitudinally from the partition wall to partition the space between the third inlet hole and the third outlet hole of the second plate.
  14. In claim 1, the heat exchanger is, A heat exchanger characterized by having a plurality of beads formed on the first plate and the second plate.
  15. In Clause 14, the heat exchanger is, A heat exchanger characterized in that the bead density formed on the first plate is lower than the bead density formed on the second plate.
  16. In Clause 14, the heat exchanger is, A heat exchanger characterized in that the positions of the beads formed on the first plate and the beads formed on the second plate are offset from each other.
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Description

Heat exchanger The present invention relates to a heat exchanger, and more specifically, to a heat exchanger formed so that two different types of fluids and another type of fluid can exchange heat with each other, that is, formed so that three types of fluids can exchange heat with each other. Generally, the engine compartment of a vehicle is equipped with various heat exchangers, such as radiators, intercoolers, evaporators, and condensers, to cool various components within the vehicle, such as the engine, or to regulate the air temperature inside the vehicle, in addition to components for operation like the engine. These heat exchangers typically have a heat exchange medium circulating inside, and cooling or heat dissipation occurs as the heat exchange medium inside the heat exchanger exchanges heat with the air outside the heat exchanger. A heat exchanger that uses a single type of heat exchange medium to exchange heat with external air in this manner is also referred to as an air-cooled heat exchanger. In many cases, a single type of heat exchange medium flows through a heat exchanger, but depending on the need, heat exchangers with two types of heat exchange media may be formed as a single integrated unit. For example, in the case of an automobile's radiator and oil cooler, coolant flows through the radiator to cool the engine, while oils such as engine oil and transmission oil flow through the oil cooler. Of course, they can be formed as separate devices, but they are also frequently formed as an integrated unit, such as to maximize space utilization in the engine compartment or to introduce a water-cooled oil cooler structure that cools the oil using coolant. When two types of heat exchange media flow, there is a method in which the two types of heat exchange media exchange heat with the outside air to cool each other, which also corresponds to an air-cooled heat exchanger; however, there is also a method in which the two types of heat exchange media exchange heat with each other, and specifically when one of the two types of heat exchange media is coolant, it is referred to as a water-cooled heat exchanger. There are various embodiments of a heat exchanger in which two types of heat exchange media exchange heat with each other, such as a structure like a pipe through which one type of heat exchange media flows simply being inserted into a space through which one type of heat exchange media flows, or a plate heat exchanger formed such that different types of heat exchange media flow through each layer, thereby allowing heat exchange to occur at the boundaries of each layer. Korean Patent Registration No. 1545648 ("Plate Heat Exchanger", August 12, 2015; hereinafter referred to as "Prior Art") discloses a heat exchanger technology in which two types of heat exchange media circulate and exchange heat with each other. FIG. 1 is an exploded perspective view of a conventional two-fluid heat exchanger. As shown in FIG. 1, the plate heat exchanger is formed in a form in which two types of plates are alternately stacked, and has four inlets and outlets so that two different types of fluids flow in and out, as indicated as "refrigerant" and "cooling water" in FIG. 1. In the example of FIG. 1, both the first and second plates (500a) and (500b) are recessed downward to form a fluid circulation space. In the first plate (500a), the edges of the communication holes (510) (520) connected to the refrigerant inlet and refrigerant outlet protrude toward the opposite side of the fluid circulation space, i.e., downward, and the edges of the communication holes (530) (540) connected to the cooling water inlet and cooling water outlet protrude toward the fluid circulation space, i.e., upward. The communication holes of the second plate (500b) have the opposite structure. When the second plate (500b) and the first plate (500a) are stacked sequentially, the edges of the cooling water-side communication holes (530) (540) of the lower first plate (500a) protrude upward, and the edges of the cooling water-side communication holes (530) (540) of the upper second plate (500b) protrude downward, so that they come into contact with each other. Accordingly, the space formed by sequentially stacking the second plate (500b) and the first plate (500a), that is, the space indicated by the thick arrow in FIG. 1 where fluid flows, cannot be entered (since the edges of the cooling water-side communication holes come into contact with each other and become blocked), and only refrigerant flows in that space. Conversely, when the first plate (500a) and the second plate (500b) are sequentially stacked, only cooling water flows in the space formed by sequentially stacking the first plate (500a) and the second plate (500b), that is, the space indicated by the light arrow in FIG. 1 where fluid flows. As described above, since the plate heat exchanger is formed in a form where the first and second plates (500a) (500b) are alternately stacked, t