Heat exchanger

Abstract

Introduced in the present invention is a heat exchanger, which ensures heat exchange efficiency between a plurality of refrigerants, circulates cooling water through an independent flow path, and prevents thermal interference when a plurality of heat exchange parts are provided.

Description

heat exchanger device

[0001] The present invention relates to a heat exchanger device that allows different cooling media to exchange heat.

[0002] Heat exchangers are generally devices that perform heat exchange by absorbing or releasing heat between different heat-exchange media. These heat exchangers are manufactured in a variety of ways, depending on their intended use. These include condensers and evaporators that use refrigerant as the heat-exchange medium, radiators and heater cores that use coolant as the heat-exchange medium, and oil coolers that use oil used in engines and transmissions as the heat-exchange medium.

[0003] With the recent advancement of electric mobility technology, air conditioning technology using heat exchangers is becoming a hot topic. Specifically, to ensure air conditioning efficiency in electric mobility, energy consumption is reduced through efficient heat exchange between refrigerant and coolant.

[0004] Typically, heat exchangers operate a cooling water plate through which cooling water circulates and a refrigerant plate through which refrigerant circulates, so that the refrigerant and cooling water exchange heat through the cooling water plate and the refrigerant plate.

[0005] These heat exchangers utilize multiple internal heat exchangers to improve cooling performance. However, securing a certain number of straight sections within the complex internal structure of electric vehicles makes it difficult to apply internal heat exchangers.

[0006] To this end, multiple internal heat exchangers are integrated and combined, but thermal efficiency is reduced due to thermal interference between each internal heat exchanger.

[0007]

[0008] The matters described as background technology above are only intended to enhance understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those skilled in the art.

[0009] The problem to be solved by the present invention is to provide a heat exchanger device in which heat exchange efficiency between a plurality of refrigerants is secured, cooling water is circulated through an independent flow path, and thermal interference is prevented when a plurality of heat exchange units are configured.

[0010] In order to achieve the above object, a heat exchanger device according to the present invention comprises: a first heat exchanger comprising a plurality of first heat exchange plates, wherein refrigerant and cooling water are introduced through different paths and individually circulated between the first heat exchange plates, thereby exchanging heat between the refrigerant and cooling water; a second heat exchanger comprising a plurality of second heat exchange plates, wherein refrigerant mixed after heat exchange in the first heat exchanger is introduced through a different path, thereby exchanging heat between the refrigerant; and a cooling water passage through which cooling water is circulated, the cooling water passage being connected to the first heat exchanger and the second heat exchanger, the cooling water passage being connected to be supplied to the first heat exchanger and to be bypassed by the second heat exchanger.

[0011] The first heat exchange unit is provided with a first cooling water passage through which cooling water is introduced and a second cooling water passage through which cooling water heat-exchanged in the first heat exchange unit is discharged, and the second heat exchange unit is provided with a third cooling water passage that is connected to the first cooling water passage and bypasses the second heat exchange unit.

[0012] The second heat exchanger is characterized in that a partition wall is formed around the third cooling water passage on some of the second heat exchange plates or each of the second heat exchange plates, so that the second heat exchanger plates are divided into an isolation area and a heat exchange area by the partition wall.

[0013] Among the plurality of second heat exchange plates, some of the second heat exchange plates are characterized in that the baffle portion is sunken toward the opposing second heat exchange plate and is joined to the opposing second heat exchange plate, thereby forming a sealed structure.

[0014] The second heat exchanger is characterized by having second heat exchange plates with a partition formed thereon and second heat exchange plates without a partition formed thereon alternately laminated.

[0015] The bulkhead section is characterized by comprising a first bulkhead that is sunken in one of the second heat exchange plates and contacts the opposing heat exchange plate, a second bulkhead that is sunken in the opposite direction to the first bulkhead and forms a space, and a third bulkhead that faces the second bulkhead in another second heat exchange plate and is sunken in the same direction as the first bulkhead and forms a closed space together with the space of the second bulkhead.

[0016] The second heat exchange unit is characterized in that a second heat exchange plate having a first bulkhead and a second bulkhead formed thereon and a second heat exchange plate having a third bulkhead formed thereon are alternately laminated and the bulkheads are joined together.

[0017] The first heat exchange unit is provided with a first refrigerant inlet and a second refrigerant inlet through which refrigerant is introduced from different paths, the second heat exchange unit is provided with a third refrigerant inlet through which refrigerant is introduced from another path, a first refrigerant outlet through which refrigerant introduced through the third refrigerant inlet is discharged, and a second refrigerant outlet through which refrigerant heat-exchanged in the first heat exchange unit and the second heat exchange unit is discharged.

[0018] The second heat exchanger is characterized in that a partition wall is formed around the third cooling water passage on some of the second heat exchange plates or each of the second heat exchange plates, so that the second heat exchange plates are divided into an isolation area and a heat exchange area by the partition wall, the third cooling water passage is arranged in the isolation area, and the third refrigerant inlet, the first refrigerant outlet, and the second refrigerant outlet are arranged in the heat exchange area.

[0019] The third refrigerant inlet and the second refrigerant outlet are arranged on one side of the heat exchange area, and the first refrigerant outlet and the communication path connected to the first heat exchange section are arranged spaced apart on the other side of the heat exchange area.

[0020] One of the plurality of second heat exchange plates is formed to be in communication with the third refrigerant inlet and the first refrigerant outlet, and the other is formed to be in communication with the first refrigerant outlet and the communication path, and each of the second heat exchange plates is alternately stacked.

[0021] The second heat exchanger is characterized in that a third refrigerant inlet and a third cooling water passage are respectively arranged near each corner on one side, a first refrigerant outlet and a communication passage connected to the first heat exchanger are respectively arranged near each corner on the other side, and a second refrigerant outlet is arranged on the other side of the third cooling water passage.

[0022] As a partition wall is formed around the third coolant passage on the second heat exchange plate, the second heat exchange plate is characterized in that the isolation region in which the third coolant passage is arranged, the third refrigerant inlet, the first refrigerant outlet, and the second refrigerant outlet are divided into heat exchange regions.

[0023] In the second heat exchanger, the third refrigerant inlet and the first refrigerant outlet are arranged diagonally apart from each other, and the second refrigerant outlet and the communication path are arranged diagonally apart from each other.

[0024] The first heat exchange unit is provided with a first refrigerant inlet through which refrigerant flows in, the second heat exchange unit is provided with a second refrigerant inlet through which refrigerant flows in from another path, a third refrigerant inlet through which refrigerant flows in from another path, a first refrigerant outlet through which refrigerant flowing in through the third refrigerant inlet is discharged, and a second refrigerant outlet through which refrigerant heat-exchanged in the first heat exchange unit and the second heat exchange unit is discharged.

[0025] The second heat exchanger is characterized in that a partition wall is formed around a third cooling water passage on some of the second heat exchange plates or each of the second heat exchange plates, so that the second heat exchanger plates are divided into an isolation area and a heat exchange area by the partition wall, the third cooling water passage is arranged in the isolation area, and the second refrigerant inlet, the third refrigerant inlet, the first refrigerant outlet, and the second refrigerant outlet are arranged in the heat exchange area.

[0026] The second refrigerant inlet is arranged to match the communication path that is connected from the second heat exchanger to the first heat exchanger, the third refrigerant inlet and the second refrigerant outlet are arranged on one side of the heat exchange area, and the first refrigerant outlet and the second refrigerant inlet are arranged spaced apart from each other on the other side.

[0027] One of the plurality of second heat exchange plates is formed to be in communication with the third refrigerant inlet and the first refrigerant outlet, and the other is formed to be in communication with the second refrigerant inlet, the first refrigerant outlet, and the communication path, and each of the second heat exchange plates is alternately stacked.

[0028] A plate is provided between the first heat exchanger and the second heat exchanger, and the first heat exchanger and the second heat exchanger are connected via the plate.

[0029] The plate is characterized in that a sunken pocket portion having a certain area is formed, and a space is formed by the pocket portion on a surface facing the first heat exchange section or the second heat exchange section.

[0030] A heat exchanger device having a structure as described above ensures heat exchange efficiency between multiple refrigerants, circulates cooling water through an independent flow path, and prevents thermal interference by configuring multiple heat exchange sections.

[0031] FIG. 1 is a drawing showing a heat exchanger device according to a first embodiment of the present invention.

[0032] Figure 2 is a drawing showing an embodiment of a second heat exchange unit in a heat exchanger device according to the present invention.

[0033] Fig. 3 is a cross-sectional view of a second heat exchange unit according to an embodiment illustrated in Fig. 1.

[0034] Figure 4 is a drawing showing another embodiment of a second heat exchanger in a heat exchanger device according to the present invention.

[0035] Fig. 5 is a cross-sectional view of a second heat exchange unit according to an embodiment illustrated in Fig. 1.

[0036] FIG. 6 is a drawing showing one of the second heat exchange plates in the second heat exchange unit according to the first embodiment of the present invention.

[0037] Fig. 7 is a drawing showing another second heat exchange plate in a second heat exchange unit according to the first embodiment of the present invention.

[0038] Figure 8 is a drawing showing the fluid flow of the first heat exchange unit and the second heat exchange unit according to the first embodiment of the present invention.

[0039] Fig. 9 is a drawing showing a heat exchanger device according to a second embodiment of the present invention.

[0040] Fig. 10 is a drawing showing one of the second heat exchange plates in the second heat exchange unit according to the second embodiment of the present invention.

[0041] Fig. 11 is a drawing showing another second heat exchange plate in a second heat exchange unit according to a second embodiment of the present invention.

[0042] Fig. 12 is a drawing showing the fluid flow of the first heat exchange unit and the second heat exchange unit according to the second embodiment of the present invention.

[0043] Fig. 13 is a drawing showing a heat exchanger device according to a third embodiment of the present invention.

[0044] Fig. 14 is a drawing showing one of the second heat exchange plates in the second heat exchange unit according to the third embodiment of the present invention.

[0045] Fig. 15 is a drawing showing another second heat exchange plate in a second heat exchange unit according to a third embodiment of the present invention.

[0046] Fig. 16 is a drawing showing the fluid flow of the first heat exchange unit and the second heat exchange unit according to the third embodiment of the present invention.

[0047] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components are given the same reference numbers and redundant descriptions thereof will be omitted.

[0048] The suffixes "module" and "part" used for components in the following description are given or used interchangeably only for the convenience of writing specifications, and do not have distinct meanings or roles in themselves.

[0049] In describing the embodiments disclosed in this specification, detailed descriptions of related known technologies will be omitted if it is determined that such detailed descriptions may obscure the gist of the embodiments disclosed in this specification. In addition, the attached drawings are provided solely to facilitate understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included within the spirit and technical scope of the present invention.

[0050] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0051] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0052] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0053] In this specification, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0054] Hereinafter, a heat exchanger device according to a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0055]

[0056] A heat exchanger device according to the present invention, as illustrated in FIGS. 1 and 2, comprises: a first heat exchange unit (100) composed of a plurality of first heat exchange plates (110), in which refrigerant and cooling water are introduced through different paths and individually circulated between the first heat exchange plates (110) so that heat is exchanged between the refrigerant and cooling water; a second heat exchange unit (200) composed of a plurality of second heat exchange plates (210), in which refrigerant mixed after heat exchange in the first heat exchange unit (100) is introduced through a different path so that each refrigerant is heat-exchanged; and a cooling water passage (300) through which cooling water is circulated, connected to the first heat exchange unit (100) and the second heat exchange unit (200), connected so that cooling water is supplied to the first heat exchange unit (100) and connected so that the second heat exchange unit (200) is bypassed.

[0057] The first heat exchange unit (100) and the second heat exchange unit (200) can be configured to be built into the housing.

[0058] The first heat exchange unit (100) is formed by stacking a plurality of first heat exchange plates (110), so that refrigerant and cooling water are circulated between each of the first heat exchange plates (110). Refrigerants of different temperatures can be introduced into the first heat exchange unit (100) through different paths, and the temperatures of the refrigerant and cooling water can be controlled through heat exchange between the refrigerant and cooling water.

[0059] The second heat exchange unit (200) is formed by stacking a plurality of second heat exchange plates (210), so that refrigerant flows between each of the second heat exchange plates (210). A refrigerant of another temperature is introduced into the second heat exchange unit (200), and the refrigerant that has undergone heat exchange in the first heat exchange unit (100) is introduced thereto. As a result, the temperature can be controlled by heat-exchanging the refrigerant of another temperature with the refrigerant that has passed through the first heat exchange unit (100) in the second heat exchange unit (200).

[0060] Meanwhile, a cooling water passage (300) is connected to the first heat exchange unit (100) and the second heat exchange unit (200). In this way, the cooling water passage (300) is configured to pass through the first heat exchange unit (100) and the second heat exchange unit (200), thereby enabling the overall structure within the electric mobility to be reduced.

[0061] In addition, the cooling water passage (300) is connected to the first heat exchange unit (100) so that cooling water can be circulated, and in the case of the second heat exchange unit (200), heat exchange between refrigerants is performed, so that the second heat exchange unit (200) is configured to bypass the second heat exchange unit (200) so that heat exchange between the cooling water and the refrigerant is not performed. In this way, the cooling water passage (300) passes through the second heat exchange unit (200), but is separated from the refrigerant that is heat-exchanged in the second heat exchange unit (200), thereby forming an independent circulation path.

[0062]

[0063] Specifically, the present invention described above may be described as follows: the first heat exchange unit (100) may be provided with a first cooling water passage (310) through which cooling water is introduced and a second cooling water passage (320) through which cooling water heat-exchanged in the first heat exchange unit (100) is discharged, and the second heat exchange unit (200) may be provided with a third cooling water passage (330) that is connected to the first cooling water passage (310) and bypasses the second heat exchange unit (200).

[0064] The first cooling water passage (310) and the second cooling water passage (320) provide a path for cooling water that has exchanged heat with the refrigerant in the first heat exchange unit (100) to circulate, and the third cooling water passage (330) provides a path for circulating by bypassing each heat exchange unit without heat exchange with the refrigerant.

[0065] For example, in the thermal management circuit, the first coolant passage (310) may be configured to circulate coolant that has passed through the battery, and the second coolant passage (320) may be configured to supply coolant that has exchanged heat with the refrigerant in the first heat exchange unit (100) to the battery side.

[0066] In addition, the third coolant passage (330) may be configured to circulate coolant to the radiator. This third coolant passage (330) may be configured as an inlet through which coolant flows in or an outlet through which coolant flows out, depending on the design of the coolant circuit. That is, when the third coolant passage (330) is configured as an inlet, the coolant flowing in through the third coolant passage (330) may bypass the second heat exchanger (200) and flow to the first heat exchanger (100), and then join with the coolant flowing in through the first coolant passage (310) to form a flow that is discharged to the first coolant passage (320). In addition, when the third cooling water passage (330) is configured as an outlet, it can be connected to the first cooling water passage (310) in the second heat exchange unit (200) so that the cooling water introduced through the first cooling water passage (310) bypasses the first heat exchange unit (100) and the second heat exchange unit (200).

[0067] Through this, various thermal management modes can be performed according to the temperature control of the coolant, including heating or cooling of the battery, by controlling the coolant valve provided in the thermal management circuit.

[0068]

[0069] Meanwhile, in the present invention, a structure is configured to prevent heat exchange between the refrigerant and the cooling water by forming a cooling water passage (300) in the second heat exchange unit (200).

[0070] That is, as the second heat exchange unit (200) is formed with a partition wall (P) around the third cooling water passage (330) on some of the second heat exchange plates (210) or each of the second heat exchange plates (210), the second heat exchange plate (210) can be divided into an isolation region (A) and a heat exchange region (B) by the partition wall (P). In the case of the isolation region (A), the cooling water circulating in the cooling water passage (300) is circulated, and in the case of the heat exchange region (B), the refrigerant is introduced to perform heat exchange between the refrigerants.

[0071] In this way, the partition wall (P) is formed on the second heat exchange plate (210) to block the circulation of the refrigerant circulating between each second heat exchange plate (210), thereby separating the refrigerant and the cooling water circulating in the third cooling water passage (330) from the second heat exchange plate (210).

[0072] This bulkhead (P) can be applied in various embodiments.

[0073] As an example according to the partition wall (P), as shown in FIGS. 2 and 3, among the plurality of second heat exchange plates (210), some of the second heat exchange plates (210) may have the partition wall (P) sunk toward the opposing second heat exchange plate (210) and be joined to the opposing second heat exchange plate (210), thereby forming an airtight structure.

[0074] Here, the second heat exchange unit (200) may be formed by alternately stacking a second heat exchange plate (210) having a partition wall (P) formed thereon and a second heat exchange plate (210) without a partition wall (P).

[0075] In this way, the partition wall portion (P) according to one embodiment may be formed by alternately forming the partition walls (P) among a plurality of second heat exchange plates (210), and each partition wall portion (P) may be extended by being sunken toward the opposing second heat exchange plate (210) and may form an airtight structure by being joined to the facing second heat exchange plate (210).

[0076] Accordingly, in the second heat exchange unit (200), the cooling water and refrigerant circulating in the cooling water passage (300) in each second heat exchange plate (210) are separated, and heat transfer is minimized by the partition wall (P), so that thermal interference between the cooling water and the refrigerant can be prevented.

[0077] In addition, the leakage of cooling water is prevented by the airtight structure of the bulkhead (P), thereby ensuring the durability of the second heat exchanger (200).

[0078]

[0079] Meanwhile, as another embodiment according to the partition wall portion (P), as illustrated in FIGS. 4 and 5, the partition wall portion (P) may be composed of a first partition wall (P1) that is sunken in one of the second heat exchange plates (210) and contacts the opposing heat exchange plate, a second partition wall (P2) that is sunken in the opposite direction to the first partition wall (P1) to form a space, and a third partition wall (P3) that faces the second partition wall (P2) in another second heat exchange plate (210) and is sunken in the same direction as the first partition wall (P1) to form a closed space together with the space of the second partition wall (P2).

[0080] Here, the second heat exchange unit (200) is formed by alternately stacking a second heat exchange plate (210) having a first partition wall (P1) and a second partition wall (P2) formed thereon and a second heat exchange plate (210) having a third partition wall (P3) formed thereon so that each partition wall can be joined.

[0081] In this way, the partition wall portion (P) according to another embodiment is formed on each second heat exchange plate (210), and is configured to be divided into a second heat exchange plate (210) in which a first partition wall (P1) and a second partition wall (P2) are formed, and a second heat exchange plate (210) in which a third partition wall (P3) is formed.

[0082] Through this, the plurality of second heat exchange plates (210) form an airtight structure as the first partition wall (P1) formed on one of the second heat exchange plates (210) extends toward the opposing heat exchange plate and is joined, and the second partition wall (P2) recessed in the opposite direction to the first partition wall (P1) matches the third partition wall (P3) formed on the opposing second heat exchange plate (210) to form a closed space, thereby forming an additional airtight structure.

[0083] In this way, the first bulkhead (P1) allows the facing second heat exchange plates (210) to be mutually joined, and the second bulkhead (P2) and the third bulkhead (P3) form an airtight structure while also securing heat blocking performance through a closed space, thereby minimizing heat exchange between the refrigerant and the cooling water.

[0084] In this way, the present invention, when forming a partition wall (P) on the second heat exchange plate (210) of the second heat exchange unit (200), can form an optimal structure in which a heat blocking function between the refrigerant and the cooling water is secured by selectively applying each embodiment of the partition wall (P) such as design conditions and airtightness performance.

[0085]

[0086] Meanwhile, the present invention can be applied in various embodiments to a structure in which refrigerant and cooling water are circulated in the first heat exchange unit (100) and the second heat exchange unit (200).

[0087] In the description of each embodiment below, the refrigerant circulated in the second heat exchange unit (200) or another heat exchange medium can be distributed to the first refrigerant inlet (D1), the refrigerant heat-exchanged at the outlet of the evaporator can be distributed to the second refrigerant inlet (D2), and the refrigerant discharged from the outlet of the compressor can be distributed to the third refrigerant inlet (D3). This can be configured differently depending on the thermal management circuit, and the distribution of each refrigerant can be determined by a valve provided in the thermal management circuit.

[0088]

[0089] As a first embodiment, as shown in FIGS. 1, 6 and 7, the first heat exchange unit (100) may be provided with a first refrigerant inlet (D1) and a second refrigerant inlet (D2) through which refrigerant is introduced from different paths.

[0090] The second heat exchange unit (200) may be provided with a third refrigerant inlet (D3) through which refrigerant is introduced from another path, a first refrigerant outlet (D4) through which the refrigerant introduced through the third refrigerant inlet (D3) is discharged, and a second refrigerant outlet (D5) through which the refrigerant heat-exchanged in the first heat exchange unit (100) and the second heat exchange unit (200) is discharged.

[0091] In this way, the first heat exchange unit (100) is provided with a first refrigerant inlet (D1) and a second refrigerant inlet (D2) so that refrigerants of different temperatures can be introduced through different paths. For example, refrigerant circulated in the second heat exchange unit (200) or another heat exchange medium can be introduced into the first refrigerant inlet (D1), and refrigerant heat-exchanged at the outlet of the evaporator can be introduced into the second refrigerant inlet (D2).

[0092] In this way, the refrigerant introduced through the first refrigerant inlet (D1) is heat-exchanged with the cooling water introduced through the first cooling water passage (310), and then mixed with the refrigerant introduced through the second refrigerant inlet (D2) and distributed to the second heat exchange unit (200).

[0093] The second heat exchange unit (200) is provided with a third refrigerant inlet (D3), through which high-temperature refrigerant that has passed through the compressor can be circulated. In addition, the second heat exchange unit (200) is provided with a first refrigerant outlet (D4) through which the refrigerant introduced through the third refrigerant inlet (D3) is circulated through the second heat exchange plate (210) and then discharged, and a second refrigerant outlet (D5) through which the mixed refrigerant that has undergone heat exchange in the first heat exchange unit (100) is heat-exchanged with the refrigerant introduced through the third refrigerant inlet (D3) in the second heat exchange unit (200) and then discharged.

[0094] In this way, the present invention is configured so that the first heat exchange unit (100) and the second heat exchange unit (200) are connected, so that the refrigerant introduced through the first refrigerant inlet (D1) in the first heat exchange unit (100) and the refrigerant introduced through the second refrigerant inlet (D2) are mixed and distributed to the second heat exchange unit (200), and the refrigerant that has passed through the first heat exchange unit (100) and the refrigerant introduced through the third refrigerant inlet (D3) are heat-exchanged in the second heat exchange unit (200), thereby efficiently managing the temperature of the refrigerant.

[0095]

[0096] Here, the second heat exchanger (200) is formed with a partition wall (P) around the third cooling water passage (330) on some of the second heat exchange plates (210) or each of the second heat exchange plates (210), so that the second heat exchanger plate (210) is divided into an isolation area (A) and a heat exchange area (B) by the partition wall (P), the third cooling water passage (330) is arranged in the isolation area (A), and the third refrigerant inlet (D3), the first refrigerant outlet (D4), and the second refrigerant outlet (D5) can be arranged in the heat exchange area (B).

[0097] In this way, the second heat exchange unit (200) is divided into an isolation area (A) and a heat exchange area (B) by a partition wall (P) for each second heat exchange plate (210), and in the isolation area (A), the cooling water circulated in the cooling water passage (300) is circulated, and in the heat exchange area (B), heat exchange between refrigerants is performed.

[0098] Due to this, the second heat exchange unit (200) separates the flow of coolant and refrigerant in each second heat exchange plate (210), and heat transfer is minimized by the partition wall (P), thereby preventing thermal interference between the coolant and refrigerant.

[0099]

[0100] In addition, the third refrigerant inlet (D3) and the second refrigerant outlet (D5) may be arranged on one side of the heat exchange area (B), and the first refrigerant outlet (D4) and the communication path (D6) connected to the first heat exchange unit (100) may be arranged spaced apart from each other on the other side of the heat exchange area (B).

[0101] One of the plurality of second heat exchange plates (210) is formed to be in communication with the third refrigerant inlet (D3) and the first refrigerant outlet (D4), and the other is formed to be in communication with the first refrigerant outlet (D4) and the communication path (D6), and each of the second heat exchange plates (210) can be alternately stacked.

[0102] As illustrated in FIG. 6, one of the second heat exchange plates (210) has a third refrigerant inlet (D3) and a first refrigerant outlet (D4) spaced apart from each other on one side and the other side, so that heat exchange of the refrigerant can be performed in the heat exchange area (B) therebetween.

[0103] In addition, as illustrated in FIG. 7, another second heat exchange plate (210) is arranged so that the first refrigerant outlet (D4) and the communication path (D6) are spaced apart from each other on one side and the other side, so that heat exchange of the refrigerant can be performed in the heat exchange area (B) therebetween.

[0104] As these second heat exchange plates (210) are alternately stacked, a flow in which refrigerant is heat-exchanged can be formed through the heat exchange area (B) of each second heat exchange plate (210).

[0105] That is, as illustrated in FIG. 8, in the first heat exchange unit (100), the cooling water introduced through the first cooling water passage (310) to one first heat exchange plate (110) is circulated to the second cooling water passage (320), and the refrigerant introduced through the first refrigerant inlet (D1) to the other second heat exchange plate (210) is mixed with the refrigerant introduced through the second refrigerant inlet (D2) after heat exchange with the cooling water and circulated to the communication path (D6). In this first heat exchange unit (100), the refrigerant and the cooling water can exchange heat as different first heat exchange plates (110) are alternately stacked.

[0106] In the second heat exchange unit (200), the refrigerant introduced through the communication passage (D6) to one of the second heat exchange plates (210) is circulated to the second refrigerant outlet (D5), and in the other second heat exchange plate (210), the refrigerant is circulated to the first refrigerant outlet (D4) after heat exchange with the refrigerant introduced through the communication passage (D6) through the third refrigerant inlet (D3). In this second heat exchange unit (200), heat exchange between refrigerants can be performed as different second heat exchange plates (210) are alternately stacked.

[0107] In particular, in the second heat exchange unit (200), a third cooling water passage (330) connected to the first cooling water passage (310) is separated from the refrigerant side by a partition wall (P), so that cooling water circulating in the third cooling water passage (330) can pass without heat exchange.

[0108]

[0109] Meanwhile, as a second embodiment, as shown in FIGS. 9 to 11, the second heat exchange unit (200) may have a third refrigerant inlet (D3) and a third cooling water passage (330) arranged near each corner on one side, a first refrigerant outlet (D4) and a communication passage (D6) connected to the first heat exchange unit (100) may be arranged near each corner on the other side, and a second refrigerant outlet (D5) may be arranged on the other side of the third cooling water passage (330).

[0110] In this way, the second heat exchanger (200) is provided with a third cooling water passage (330) near one edge, and a third refrigerant inlet (D3) and a second refrigerant outlet (D5) are provided adjacent to the periphery of the third cooling water passage (330), so that the cooling water circulating in the third cooling water passage (330) in each second heat exchanger plate (210) can be independently separated, while the third refrigerant inlet (D3) and the second refrigerant outlet (D5) can be optimally arranged.

[0111] In addition, in the second heat exchange unit (200), the third refrigerant inlet (D3) and the first refrigerant outlet (D4) are spaced apart from each other in a diagonal direction, and the second refrigerant outlet (D5) and the communication path (D6) are spaced apart from each other in a diagonal direction, thereby securing a heat exchange area for each refrigerant.

[0112] That is, as can be seen in FIGS. 9 and 10, the third refrigerant inlet (D3) and the second refrigerant outlet (D5) are arranged by utilizing the entire surrounding space of the third cooling water passage (330), the first refrigerant outlet (D4) is arranged diagonally to the third refrigerant inlet (D3), and the communication path (D6) is arranged diagonally to the second refrigerant outlet (D5), thereby improving the heat exchange efficiency by increasing the heat exchange area of ​​each second heat exchange plate (210).

[0113] Here, as a partition wall (P) is formed around the third cooling water passage (330) on the second heat exchange plate (210), the second heat exchange plate (210) can be divided into an isolation area (A) where the third cooling water passage (330) is arranged, and a heat exchange area (B) where the third refrigerant inlet (D3), the first refrigerant outlet (D4), and the second refrigerant outlet (D5) are located.

[0114] That is, the second heat exchange unit (200) is divided into an isolation area (A) and a heat exchange area (B) by a partition wall (P) for each second heat exchange plate (210). In the isolation area (A), the cooling water circulated in the third cooling water passage (330) is circulated, and in the heat exchange area (B), heat exchange between refrigerants is performed.

[0115] Due to this, the second heat exchange unit (200) separates the flow of coolant and refrigerant in each second heat exchange plate (210), and heat transfer is minimized by the partition wall (P), thereby preventing thermal interference between the coolant and refrigerant.

[0116] As the second heat exchange plates (210) described above are alternately stacked, a flow in which refrigerant is heat-exchanged can be formed through the heat exchange area (B) of each second heat exchange plate (210).

[0117] That is, as illustrated in FIG. 12, the first heat exchange unit (100) is configured such that the cooling water introduced through the first cooling water passage (310) to one first heat exchange plate (110) is distributed to the second cooling water passage (320), and the refrigerant introduced through the first refrigerant inlet (D1) to the other second heat exchange plate (210) is mixed with the refrigerant introduced through the second refrigerant inlet (D2) after heat exchange with the cooling water and distributed to the communication path (D6). In this first heat exchange unit (100), the illustrated first heat exchange plates (110) are configured to be alternately stacked.

[0118] In the second heat exchange unit (200), the refrigerant introduced through the communication path (D6) to one of the second heat exchange plates (210) is distributed to the second refrigerant outlet (D5), and the refrigerant is heat-exchanged through the third refrigerant inlet (D3) to the other second heat exchange plate (210) and then distributed to the first refrigerant outlet (D4). In this second heat exchange unit (200), the respective second heat exchange plates (210) illustrated are configured to be alternately stacked.

[0119] In particular, in the second heat exchange unit (200), a third cooling water passage (330) connected to the first cooling water passage (310) is separated from the refrigerant side by a partition wall (P), so that cooling water circulating in the third cooling water passage (330) can pass without heat exchange.

[0120]

[0121] Meanwhile, as a third embodiment, as illustrated in FIGS. 13 to 15, the first heat exchange unit (100) may be provided with a first refrigerant inlet (D1) through which refrigerant is introduced, the second heat exchange unit (200) may be provided with a second refrigerant inlet (D2) through which refrigerant is introduced from another path, a third refrigerant inlet (D3) through which refrigerant is introduced from another path, a first refrigerant outlet (D4) through which refrigerant introduced through the third refrigerant inlet (D3) is discharged, and a second refrigerant outlet (D5) through which refrigerant heat-exchanged in the first heat exchange unit (100) and the second heat exchange unit (200) is discharged.

[0122] In this way, the first heat exchange unit (100) is provided with a first refrigerant inlet (D1), and the refrigerant flowing into the first refrigerant inlet (D1) exchanges heat with the cooling water flowing through the first cooling water passage (310) and then flows to the second heat exchange unit (200). For example, the refrigerant circulated in the second heat exchange unit (200) or another heat exchange medium may flow into the first refrigerant inlet (D1), and the refrigerant heat-exchanged at the outlet of the evaporator may flow into the second refrigerant inlet (D2).

[0123] The second heat exchanger (200) is provided with a second refrigerant inlet (D2) and a third refrigerant inlet (D3). A low-temperature refrigerant that has passed through the evaporator can be circulated through the second refrigerant inlet (D2), and a high-temperature refrigerant that has passed through the compressor can be circulated through the third refrigerant inlet (D3).

[0124] In addition, the second heat exchange unit (200) is provided with a first refrigerant outlet (D4) through which the refrigerant introduced through the third refrigerant inlet (D3) is circulated through the second heat exchange plate (210) and then discharged. Here, the low-temperature refrigerant introduced through the second refrigerant inlet (D2) is mixed with the refrigerant heat-exchanged in the first heat exchange unit (100), and then heat-exchanged with the refrigerant introduced through the third refrigerant inlet (D3) and then discharged through the second refrigerant outlet (D5).

[0125] In this way, the first heat exchange unit (100) and the second heat exchange unit (200) are configured to be connected, so that the refrigerant introduced through the first refrigerant inlet (D1) in the first heat exchange unit (100) is mixed with the refrigerant introduced through the second refrigerant inlet (D2) in the second heat exchange unit (200) and then heat-exchanged with the refrigerant introduced through the third refrigerant inlet (D3), thereby enabling efficient temperature management of the refrigerant.

[0126]

[0127] Here, the second heat exchanger (200) may be divided into an isolation region (A) and a heat exchange region (B) by the partition wall (P) formed around the third cooling water passage (330) on some of the second heat exchange plates (210) or each of the second heat exchange plates (210), and the third cooling water passage (330) may be arranged in the isolation region (A), while the second refrigerant inlet (D2), the third refrigerant inlet (D3), the first refrigerant outlet (D4), and the second refrigerant outlet (D5) may be arranged in the heat exchange region (B).

[0128] In this way, the second heat exchange unit (200) is divided into an isolation area (A) and a heat exchange area (B) by a partition wall (P) for each second heat exchange plate (210), and in the isolation area (A), the cooling water circulated in the cooling water passage (300) is circulated, and in the heat exchange area (B), heat exchange between refrigerants is performed.

[0129] Due to this, the second heat exchange unit (200) separates the flow of coolant and refrigerant in each second heat exchange plate (210), and heat transfer is minimized by the partition wall (P), thereby preventing thermal interference between the coolant and refrigerant.

[0130]

[0131] In addition, the second refrigerant inlet (D2) is arranged to match the communication path (D6) connected to the first heat exchanger (100) in the second heat exchanger (200), the third refrigerant inlet (D3) and the second refrigerant outlet (D5) are arranged on one side of the heat exchange area (B), and the first refrigerant outlet (D4) and the second refrigerant inlet (D2) can be arranged spaced apart from each other on the other side.

[0132] Through this, the refrigerant introduced into the second refrigerant inlet (D2) can be mixed with the refrigerant that has been heat-exchanged with the cooling water in the first heat exchanger (100) and then distributed to the second heat exchanger (200) through the communication path (D6).

[0133] This second heat exchange unit (200) is formed such that one of the plurality of second heat exchange plates (210) is formed to be in communication with the third refrigerant inlet (D3) and the first refrigerant outlet (D4), and the other is formed to be in communication with the second refrigerant inlet (D2), the first refrigerant outlet (D4), and the communication path (D6), and each of the second heat exchange plates (210) can be alternately stacked.

[0134] As illustrated in Fig. 14, one of the second heat exchange plates (210) is arranged so that the third refrigerant inlet (D3) and the first refrigerant outlet (D4) are spaced apart from each other on one side and the other side, so that heat exchange of the refrigerant can be performed in the heat exchange area (B) therebetween.

[0135] In addition, as illustrated in FIG. 15, another second heat exchange plate (210) has a first refrigerant outlet (D4) arranged on one side, and a second refrigerant inlet (D2) and a communication path (D6) arranged to be spaced apart from each other on the other side, so that heat exchange of the refrigerant can be performed in the heat exchange area (B) therebetween.

[0136] As these second heat exchange plates (210) are alternately stacked, a flow in which refrigerant is heat-exchanged can be formed through the heat exchange area (B) of each second heat exchange plate (210).

[0137] That is, as illustrated in FIG. 16, the first heat exchange unit (100) is configured such that the cooling water introduced through the first cooling water passage (310) to one first heat exchange plate (110) is distributed to the second cooling water passage (320), and the refrigerant introduced through the first refrigerant inlet (D1) to the other second heat exchange plate (210) is distributed to the communication passage (D6) after heat exchange with the cooling water. In this first heat exchange unit (100), the illustrated first heat exchange plates (110) are configured to be alternately stacked.

[0138] In the second heat exchange unit (200), the refrigerant introduced through the communication path (D6) into one of the second heat exchange plates (210) and the refrigerant introduced through the second refrigerant inlet (D2) are mixed and circulated to the second refrigerant outlet (D5), and the refrigerant is heat-exchanged through the third refrigerant inlet (D3) into the other second heat exchange plate (210) and then circulated to the first refrigerant outlet (D4), thereby performing heat exchange between the refrigerants.

[0139] In this second heat exchange unit (200), each of the second heat exchange plates (210) as illustrated is configured to be alternately stacked.

[0140] In particular, in the second heat exchange unit (200), a third cooling water passage (330) connected to the first cooling water passage (310) is separated from the refrigerant side by a partition wall (P), so that cooling water circulating in the third cooling water passage (330) can pass without heat exchange.

[0141]

[0142] Meanwhile, as illustrated in FIG. 2, a plate (400) is provided between the first heat exchange unit (100) and the second heat exchange unit (200), so that the first heat exchange unit (100) and the second heat exchange unit (200) can be connected via the plate (400).

[0143]

[0144] A plate (400) is provided between the first heat exchange unit (100) and the second heat exchange unit (200) to prevent thermal interference between the first heat exchange unit (100) and the second heat exchange unit (200). In addition, a plurality of holes matching the passages through which refrigerant flows, including the cooling water passages (300), may be formed in the plate (400).

[0145] Here, a sunken pocket portion (410) having a certain area is formed in the plate (400), so that a space can be formed by the pocket portion (410) on the surface facing the first heat exchange unit (100) or the second heat exchange unit (200).

[0146] In this way, a pocket portion (410) may be formed on the plate (400) on either the surface of the first heat exchange unit (100) or the second heat exchange unit (200), or on the surface facing the first heat exchange unit (100) or the second heat exchange unit (200). This pocket portion (410) is formed to be sunken in the plate (400), thereby forming an empty space, thereby reducing heat transfer between the plate (400) and the first heat exchange unit (100) or the plate (400) and the second heat exchange unit (200).

[0147]

[0148] A heat exchanger device having a structure as described above ensures heat exchange efficiency between multiple refrigerants, circulates cooling water through an independent flow path, and prevents thermal interference by configuring multiple heat exchange sections.

[0149]

[0150] Although the present invention has been illustrated and described with respect to specific embodiments, it will be apparent to those skilled in the art that the present invention may be variously improved and modified without departing from the technical spirit of the invention as defined by the following claims.

[0151] [Explanation of symbols]

[0152] 100: 1st heat exchanger 110: 1st heat exchanger plate

[0153] 200: Second heat exchanger 210: Second heat exchanger plate

[0154] 300: Coolant passage 310: First coolant passage

[0155] 320: Second coolant passage 330: Third coolant passage

[0156] 400: Plate 410: Pocket

[0157] A: Isolation area B: Heat exchange area

[0158] D1: First refrigerant inlet D2: Second refrigerant inlet

[0159] D3: Third refrigerant inlet D4: First refrigerant outlet

[0160] D5: Second refrigerant outlet D6: Flue gas

[0161] P: Bulkhead P1: 1st bulkhead

[0162] P2: Second bulkhead P3: Third bulkhead

Claims

1. A first heat exchange unit composed of a plurality of first heat exchange plates, in which refrigerant and cooling water are introduced from different paths and individually circulated between each of the first heat exchange plates, thereby exchanging heat between the refrigerant and cooling water; A second heat exchanger comprising a plurality of second heat exchange plates, wherein the refrigerant is introduced through a different path from the refrigerant mixed after heat exchange in the first heat exchanger, and each refrigerant is heat exchanged; and A heat exchanger device comprising: a cooling water passage through which cooling water is distributed, connected to a first heat exchanger and a second heat exchanger, connected to provide cooling water to the first heat exchanger and connected to bypass the second heat exchanger; 2. In claim 1, The first heat exchanger is provided with a first cooling water passage through which cooling water is introduced and a second cooling water passage through which cooling water heat-exchanged in the first heat exchanger is discharged. A heat exchanger device characterized in that the second heat exchanger is provided with a third cooling water passage that communicates with the first cooling water passage and bypasses the second heat exchanger.

3. In claim 2, A heat exchanger device characterized in that the second heat exchanger is divided into an isolation region and a heat exchange region by the partition wall portion, as a partition wall portion is formed around the third cooling water passage on some of the second heat exchanger plates or each of the second heat exchanger plates.

4. In claim 3, A heat exchanger device characterized in that some of the second heat exchange plates among the plurality of second heat exchange plates have a baffle portion sunk toward an opposing second heat exchange plate and are joined to the opposing second heat exchange plate to form a hermetic structure.

5. In claim 4, A heat exchanger device characterized in that the second heat exchanger is formed with second heat exchange plates having partitions and second heat exchange plates without partitions alternately laminated.

6. In claim 3, A heat exchanger device characterized in that the baffle part is composed of a first baffle that is sunken in one of the second heat exchange plates and contacts the opposing heat exchange plate, a second baffle that is sunken in the opposite direction to the first baffle and forms a space, and a third baffle that faces the second baffle in another second heat exchange plate and is sunken in the same direction as the first baffle and forms a closed space together with the space of the second baffle.

7. In claim 6, A heat exchanger device characterized in that a second heat exchanger section is formed with a second heat exchange plate having a first bulkhead and a second bulkhead and a second heat exchange plate having a third bulkhead alternately laminated and the bulkheads are joined together.

8. In claim 2, The first heat exchanger is provided with a first refrigerant inlet and a second refrigerant inlet, through which refrigerant is introduced from different paths. A heat exchanger device characterized in that the second heat exchanger is provided with a third refrigerant inlet through which refrigerant is introduced from another path, a first refrigerant outlet through which the refrigerant introduced through the third refrigerant inlet is discharged, and a second refrigerant outlet through which the refrigerant heat-exchanged in the first heat exchanger and the second heat exchanger is discharged.

9. In claim 8, The second heat exchanger is divided into an isolation region and a heat exchange region by the partition wall formed around the third cooling water passage on some of the second heat exchanger plates or each of the second heat exchanger plates. A heat exchanger device characterized in that a third cooling water passage is arranged in an isolation area, and a third refrigerant inlet, a first refrigerant outlet, and a second refrigerant outlet are arranged in a heat exchange area.

10. In claim 8, A heat exchanger device characterized in that a third refrigerant inlet and a second refrigerant outlet are arranged on one side of a heat exchange area, and a communication path communicating with the first refrigerant outlet and the first heat exchange section is arranged spaced apart from each other on the other side of the heat exchange area.

11. In claim 8, A heat exchanger device characterized in that one of the plurality of second heat exchange plates is formed to be connected to the third refrigerant inlet and the first refrigerant outlet, and the other is formed to be connected to the first refrigerant outlet and a communication path, and the second heat exchange plates are alternately stacked.

12. In claim 8, A heat exchanger device characterized in that a second heat exchanger has a third refrigerant inlet and a third cooling water passage arranged near each corner of one side, a first refrigerant outlet and a communication passage connected to the first heat exchanger are arranged near each corner of the other side, and a second refrigerant outlet is arranged on the other side of the third cooling water passage.

13. In claim 12, A heat exchanger device characterized in that the second heat exchanger plate is divided into an isolation region in which the third cooling water passage is arranged, a third refrigerant inlet, a first refrigerant outlet, and a second refrigerant outlet as heat exchange regions, as a baffle portion is formed around the third cooling water passage on the second heat exchanger plate.

14. In claim 12, A heat exchanger device characterized in that in a second heat exchanger, a third refrigerant inlet and a first refrigerant outlet are arranged diagonally spaced apart from each other, and a second refrigerant outlet and a communication passage are arranged diagonally spaced apart from each other.

15. In claim 2, The first heat exchanger is provided with a first refrigerant inlet port through which refrigerant flows in. A heat exchanger device characterized in that the second heat exchanger is provided with a second refrigerant inlet through which refrigerant is introduced from a different path, a third refrigerant inlet through which refrigerant is introduced from another path, a first refrigerant outlet through which refrigerant introduced through the third refrigerant inlet is discharged, and a second refrigerant outlet through which refrigerant heat-exchanged in the first heat exchanger and the second heat exchanger is discharged.

16. In claim 15, The second heat exchanger is divided into an isolation region and a heat exchange region by the partition wall formed around the third cooling water passage on some of the second heat exchanger plates or each of the second heat exchanger plates. A heat exchanger device characterized in that a third cooling water passage is arranged in an isolation area, and a second refrigerant inlet, a third refrigerant inlet, a first refrigerant outlet, and a second refrigerant outlet are arranged in a heat exchange area.

17. In claim 15, The second refrigerant inlet is arranged to match the communication path connecting the second heat exchanger to the first heat exchanger, A heat exchanger device characterized in that the third refrigerant inlet and the second refrigerant outlet are arranged on one side of a heat exchange area, and the first refrigerant outlet and the second refrigerant inlet are arranged spaced apart from each other on the other side.

18. In claim 15, A heat exchanger device characterized in that one of the plurality of second heat exchange plates is formed to be in communication with the third refrigerant inlet and the first refrigerant outlet, and the other is formed to be in communication with the second refrigerant inlet, the first refrigerant outlet, and the communication path, and each of the second heat exchange plates is alternately stacked.

19. In claim 1, A heat exchanger device characterized in that a plate is provided between a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are connected via the plate.

20. In claim 19, A heat exchanger device characterized in that a plate has a sunken pocket portion having a predetermined area, and a space is formed by the pocket portion on a surface facing the first heat exchange section or the second heat exchange section.

Images