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KR-102964277-B1 - Combined heat exchanger

KR102964277B1KR 102964277 B1KR102964277 B1KR 102964277B1KR-102964277-B1

Abstract

The present invention relates to a composite heat exchanger. The objective of the present invention is to provide a composite heat exchanger that performs heating or cooling by having a cooling water circulating inside a secondary loop connected to a primary loop through which a refrigerant circulates, and which performs heating or cooling by heating or cooling the cooling water circulating therein by the refrigerant, wherein two heat exchanger cores are arranged in parallel, and a path control manifold is provided to appropriately and selectively connect each inlet and outlet so that the cooling water can flow sequentially through the two heat exchangers or flow independently through each of them, thereby maximizing heat exchange efficiency by causing the cooling water to flow sequentially through the two heat exchangers (i.e., creating the effect of being connected in series) during a cooling mode or a heating mode, and smoothly realizing dehumidification by causing low-temperature/high-temperature cooling water to flow independently through the two heat exchangers during a dehumidification mode, thereby enabling heating, cooling, and dehumidification to be performed with maximum efficiency using a single heat exchanger.

Inventors

  • 전영하

Assignees

  • 한온시스템 주식회사

Dates

Publication Date
20260513
Application Date
20210602

Claims (13)

  1. A composite heat exchanger (100) is provided in a secondary loop in which cooling water circulates and exchanges heat with the refrigerant, connected to a primary loop in which refrigerant circulates including a compressor, condenser, expansion valve, and evaporator, and performs at least one air conditioning mode selected among cooling, heating, and dehumidification by exchanging heat between high-temperature cooling water or low-temperature cooling water and external air. When the direction in which the outside air blows is called the front and the direction in which it blows out is called the rear, A first heat exchanger (110) comprising a pair of first tanks (111) formed side by side and spaced apart from each other at a certain distance to form a cooling water flow space inside, a plurality of first tubes (112) with both ends fixed to the first tanks (111) to form a cooling water flow path, a first one-sided flow port (113) formed in one of the first tanks (111) to circulate cooling water, and a first other-sided flow port (114) formed in the other of the first tanks (111) to circulate cooling water; A second heat exchanger (120) comprising a pair of second tanks (121) formed side by side and spaced apart from each other at a certain distance to form a cooling water flow space inside, a plurality of second tubes (122) with both ends fixed to the second tanks (121) to form a cooling water flow path, a second one-sided flow port (123) formed in one of the second tanks (121) to circulate cooling water, and a second other-sided flow port (124) formed in the other of the second tanks (121) to circulate cooling water; A one-sided manifold (130) connecting the first one-sided flow port (113) and the second one-sided flow port (123), comprising a first connecting port (131) connected to the first one-sided flow port (113), a flow path (1) connected to the first connecting port, a second connecting port (132) connected to the second one-sided flow port (123), and a flow path (2) connected to the second connecting port (132); A side manifold (140) connecting the first side flow port (114) and the second side flow port (124), comprising a third connecting port (143) connected to the second side flow port (124), a passage (3) connected to the third connecting port (143), a fourth connecting port (144) connected to the first side flow port (114), and a passage (4) connected to the fourth connecting port (144); Includes, A plurality of flow channels provided in the first heat exchanger (110) and the second heat exchanger (120) positioned behind the first heat exchanger (110) are connected to each other, Depending on the inflow and outflow positions of the high-temperature cooling water and the low-temperature cooling water, the cooling water is formed to flow sequentially through the first heat exchanger (110) and the second heat exchanger (120), or to flow independently through the first heat exchanger (110) and the second heat exchanger (120), respectively, wherein the inflow and outflow positions of the high-temperature cooling water and the low-temperature cooling water are determined by controlling an external valve. By adjusting the external valve above, the one-sided manifold (130) and the other-sided manifold (140) are, In cooling mode, the flow path (1) becomes a low-temperature cooling water inflow path, the flow path (3) and the flow path (4) are connected to each other, and the flow path (2) becomes a low-temperature cooling water discharge path. In heating mode, the flow path (3) becomes a high-temperature cooling water inflow path, the flow path (1) and the flow path (2) are connected to each other, and the flow path (4) becomes a high-temperature cooling water discharge path, or In heating mode, the flow path (3) becomes a high-temperature cooling water inflow path, and the flow path (2) becomes a high-temperature cooling water outflow path. A composite heat exchanger characterized in that, in the dehumidification mode, the path (1) becomes a low-temperature cooling water inlet path, the path (4) becomes a low-temperature cooling water outlet path, the path (3) becomes a high-temperature cooling water inlet path, and the path (2) becomes a high-temperature cooling water outlet path.
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  6. In claim 1, the composite heat exchanger (100) is, In cooling mode, Low-temperature cooling water sequentially passes through the above flow path (1) - above first connecting port (131) - above first one-sided flow port (113) - above first heat exchanger (110) - above first other-sided flow port (114) - above fourth connecting port (144) - above flow path (4) - above flow path (3) - above third connecting port (143) - above second other-sided flow port (124) - above second heat exchanger (120) - above second one-sided flow port (123) - above second connecting port (132) - above flow path (2), A composite heat exchanger characterized by being formed so that low-temperature cooling water flows sequentially through the first heat exchanger (110) and the second heat exchanger (120).
  7. In claim 1, the composite heat exchanger (100) is, In heating mode, High-temperature cooling water sequentially passes through the above flow path (3) - above third connecting port (143) - above second other side flow port (124) - above second heat exchanger (120) - above second one side flow port (123) - above second connecting port (132) - above flow path (2) - above flow path (1) - above first connecting port (131) - above first one side flow port (113) - above first heat exchanger (110) - above first other side flow port (114) - above fourth connecting port (144) - above flow path (4), A composite heat exchanger characterized by being formed so that high-temperature cooling water flows sequentially through the second heat exchanger (120) and the first heat exchanger (110).
  8. In claim 1, the composite heat exchanger (100) is, In heating mode, High-temperature cooling water sequentially passes through the above flow path (3) - above third connecting port (143) - above second other side flow port (124) - above second heat exchanger (120) - above second one side flow port (123) - above second connecting port (132) - above flow path (2), A composite heat exchanger characterized by being formed so that high-temperature cooling water flows only through the second heat exchanger (120).
  9. In claim 1, the composite heat exchanger (100) is, In dehumidification mode, Low-temperature cooling water sequentially passes through the above flow path (1) - above first connecting port (131) - above first one-sided flow port (113) - above first heat exchanger (110) - above first other-sided flow port (114) - above fourth connecting port (144) - above flow path (4), and High-temperature cooling water sequentially passes through the above flow path (3) - above third connecting port (143) - above second other side flow port (124) - above second heat exchanger (120) - above second one side flow port (123) - above second connecting port (132) - above flow path (2), A composite heat exchanger characterized by being formed such that low-temperature cooling water flows only through the first heat exchanger (110) and high-temperature cooling water flows only through the second heat exchanger (120).
  10. In claim 1, the composite heat exchanger (100) is, A support (101) connecting the first tank (111) and the second tank (112) at both ends of the tube rows, wherein a front portion is positioned at the end of a tube row formed by a plurality of first tubes (112) and a rear portion is positioned at the end of a tube row formed by a plurality of first tubes (112); A composite heat exchanger characterized by including
  11. In claim 1, the composite heat exchanger (100) is, A connecting member (102) that connects the first tank (111) and the second tank (121), which are arranged side by side, to integrate them; A composite heat exchanger characterized by including
  12. In claim 11, the above connecting material (102) is, Multiple notches are formed arranged in the direction of the arrangement of the tube rows, or A composite heat exchanger characterized by being formed in the shape of multiple bars that are separated from each other and arranged in the direction of the arrangement of the tube rows.
  13. In claim 1, the composite heat exchanger (100) is, Insulating material (103) interposed between the first tank (111) and the second tank (121) arranged side by side; A composite heat exchanger characterized by including

Description

Combined heat exchanger The present invention relates to a composite heat exchanger, and more specifically, to a composite heat exchanger that enables various air conditioning modes by controlling the flow of cooling water in a refrigerant-cooling water secondary loop system. Generally, the engine compartment of a vehicle is equipped with various heat exchangers, such as radiators, intercoolers, evaporators, and condensers, not only for driving components like the engine but also for cooling internal parts or regulating the air temperature inside the vehicle. These heat exchangers typically have a heat exchange medium circulating within them, and cooling or heat dissipation occurs through the exchange of heat between the internal medium and the external air. The heat exchange media circulating in these heat exchangers vary, ranging from coolant for cooling internal components to refrigerants for regulating air temperature. An air conditioning system designed to regulate the air temperature inside a vehicle is basically formed in such a way that a compressor, condenser, expansion valve, and evaporator are connected in a single loop to circulate refrigerant, and cooling is achieved by blowing air cooled by the evaporator into the vehicle's interior. Because this system performs direct cooling, it is also referred to as a direct cooling system or a primary loop. Meanwhile, since the refrigerant circulating in this primary loop possesses significant thermal energy, it is also connected to another cooling system by utilizing this energy to exchange heat with a separate heat exchange medium (e.g., cooling water). Another system connected to the primary loop in this way is called a secondary loop. Fig. 1 illustrates an embodiment of an air conditioning system having primary and secondary loops. Refrigerant circulates in the primary loop on the left, which consists of a compressor, condenser, expansion valve, and chiller, while cooling water circulates in the secondary loop on the right, which consists of a pump, chiller, and cooler. In the embodiment of Fig. 1, the refrigerant cools the cooling water by exchanging heat with the cooling water in the chiller, and the cooling water, having reached a low temperature, cools the surrounding air as it passes through the cooler, thereby performing indoor cooling. This system is well described in Korean Patent Publication No. 2019-0124931 ("Heat exchange system for vehicles," Nov. 06, 2019). The embodiment of FIG. 1 is merely a very simple example that performs only cooling using a secondary loop; however, a system in which such primary and secondary loops are actually used has a more complex configuration and can implement various air conditioning modes such as cooling, heating, and dehumidification by utilizing the flow of refrigerant or cooling water. FIG. 2 is another embodiment of an air conditioning system having primary and secondary loops, in FIG. 2, the darker lines form the primary loop as the path through which the refrigerant passes, and the lighter lines form the secondary loop as the path through which the cooling water passes. FIG. 3a to 3c illustrate the paths of the refrigerant and cooling water when performing cooling, heating, and dehumidification in the air conditioning system of FIG. 2. The heat exchangers used for air conditioning are the first and second heat exchangers indicated as ① and ② in FIG. 3a to 3c. In the cooling mode, as shown in FIG. 3a, the cooling water, which has become low temperature by cooling through heat exchange with a water-cooled evaporator, passes through the first and second heat exchangers (①) and (②), and thus low-temperature air is blown into the vehicle interior to provide cooling. In the heating mode, as shown in FIG. 3b, the cooling water, which has become high temperature by heating through heat exchange with a water-cooled condenser, passes through the first and second heat exchangers (①) and (②), and thus high-temperature air is blown into the vehicle interior to provide heating. In the dehumidification mode, as shown in FIG. 3c, the cooling water, which has become low temperature by cooling through heat exchange with a water-cooled evaporator, passes through the first heat exchanger (①) to condense moisture in the air and dehumidify it, and the cooling water, which has become high temperature by heating through heat exchange with a water-cooled condenser, passes through the second heat exchanger (②) to appropriately heat the dehumidified and cooled air to create a medium temperature, and thus dehumidified medium-temperature air is blown into the vehicle interior to provide dehumidification. As can be seen in FIGS. 3a to 3c, the system of FIG. 2 can implement various air conditioning modes such as heating, cooling, and dehumidification by maintaining the flow of the refrigerant in the primary loop while appropriately controlling only the flow of the cooling water in the secondary loop using a valve. However, the syst