Plate-type heat exchanger

Abstract

The present invention relates to a plate-type heat exchanger formed by stacking a plurality of heat exchange plates between an upper plate and a lower plate, wherein the upper plate includes a first inlet through which a first heat exchange medium is introduced and a second inlet through which a second heat exchange medium is introduced, and the lower plate includes an outlet through which the first heat exchange medium and the second heat exchange medium are combined and discharged to the outside, so that two types of heat exchange media can be combined together in the plate-type heat exchanger and then discharged to the outside. Therefore, the plate-type heat exchanger can simplify a pipe structure and thus minimize process defects.

Description

plate heat exchanger

[0001] The present invention relates to a plate heat exchanger having a structure for combining different types of heat exchange media.

[0002]

[0003] In electric vehicles, battery cooling is necessary to improve energy efficiency and lifespan. Therefore, a common method involves cooling the battery using coolant cooled through heat exchange with a low-temperature refrigerant from an air conditioning system. A chiller can be used for thermal management. The battery chiller can utilize heat exchange between the low-temperature refrigerant and the coolant, acting as an evaporator. Furthermore, an air conditioning system can be configured such that the refrigerant from the evaporator for indoor cooling and the refrigerant passing through the battery chiller are introduced into a double-pipe or compressor.

[0004] At this time, the refrigerant flowing into the double pipe or compressor must be a mixture of two types of refrigerant: the refrigerant from each evaporator and the refrigerant from the battery chiller. Therefore, a flow path structure is required between the double pipe / compressor and the chiller, allowing the refrigerant flow from the evaporator and the chiller to meet and mix. In other words, a separate refrigerant mixing structure is required between the evaporator and the chiller to allow for refrigerant mixing.

[0005] Fig. 1 shows a conventional refrigerant composite structure. The conventional air conditioning system includes a pipe (1) extending from an evaporator and a pipe (2) extending from a battery chiller, which can meet at a certain point, and a separate composite pipe (3), which mixes two types of refrigerants and then introduces them into a dual pipe / compressor. However, the conventional structure has a limitation in that the air conditioning system becomes complicated due to the configuration that requires separate evaporator refrigerant pipes (1) and chiller refrigerant pipes (2), and requires a composite pipe (3) connecting the two pipes (1, 2). In addition, this may increase the risk of leakage by including a large number of pipe structures (1, 2, 3), and may cause problems such as poor space utilization in the engine room, increased vehicle weight, and lowered system efficiency.

[0006]

[0007] The present invention has been devised to solve the above problems, and the purpose of the present invention is to provide a plate heat exchanger that includes a structure in which two types of refrigerants that have passed through an evaporator and a chiller can be combined inside a plate heat exchanger without a separate combining structure, thereby simplifying the piping configuration of an air conditioning system and minimizing process defects, when mixing two types of refrigerants that have passed through an evaporator and a chiller and providing them to a double pipe / compressor.

[0008]

[0009] In a plate heat exchanger formed by stacking a plurality of heat exchange plates between an upper plate and a lower plate of the present invention, the upper plate includes a first inlet through which a first heat exchange medium flows in, and a second inlet through which a second heat exchange medium flows in, and the lower plate includes an outlet through which the first heat exchange medium and the second heat exchange medium flow out together to the outside.

[0010] At this time, the plate heat exchanger includes a first flow path connecting the first inlet and the outlet so that the first heat exchange medium passes through the plurality of heat exchange plates and exchanges heat, and a second flow path connecting the second inlet and the outlet so that the second heat exchange medium passes through the plurality of heat exchange plates and exchanges heat, and the first flow path and the second flow path are characterized in that they are connected to each other at a specific position.

[0011] At this time, the first flow path is characterized by being a straw structure of a certain length that extends from the first inlet and has an end positioned on the outlet side.

[0012] At this time, the first flow is characterized in that the end forms a gap of a predetermined distance from the outlet.

[0013] Here, the first flow path is characterized in that it communicates with the second flow path at the gap formed at the end of the first flow path.

[0014] In addition, the second flow path is characterized in that it includes a flow path in which at least the second heat exchange medium flows along a portion of the outer surface of the first flow path.

[0015] At this time, the first heat exchange medium that has passed through the first flow path and the second heat exchange medium that has flowed along the outer surface of the first flow path are combined at the end of the first flow path and discharged through the outlet.

[0016] In addition, the second flow path is characterized in that it includes a flow path formed by a through hole having a diameter larger than the diameter of the first flow path, which is formed at least in a portion surrounding the first flow path in the heat exchange plate.

[0017] Here, the second flow path is characterized in that it includes a flow path formed by a through hole continuously along the stacking direction of the heat exchange plate from the second inlet in the heat exchange plate.

[0018] In addition, the second flow path is characterized in that the second heat exchange medium introduced into the second inlet is a U-turn flow path in which the second heat exchange medium flows through the area of ​​the heat exchange plate or between adjacent heat exchange plates.

[0019] At this time, when the second inlet is arranged at one end of the longitudinal direction of the upper plate, the U-turn flow path is characterized in that the second heat exchange medium first flows in the stacking direction of the heat exchange plate, then flows to the other end, then flows along the edge, and then flows to one end.

[0020] In addition, the first inlet and the outlet are characterized in that they are arranged on the same line in the stacking direction of the heat exchange plates.

[0021] At this time, the first inlet and the second inlet are characterized in that they are respectively positioned at corners close to each other in the upper plate.

[0022] In addition, the length of the first flow path is characterized by being more than half the length between the first inlet and the outlet.

[0023]

[0024] The plate heat exchanger of the present invention having the above configuration includes a structure capable of combining the refrigerant passing through the evaporator and the refrigerant passing through the plate heat exchanger performing the battery chiller inside the plate heat exchanger, and in particular, the refrigerant passing through the evaporator can be combined with the refrigerant of the plate heat exchanger at the rear end of the flow path of the outlet of the plate heat exchanger and then discharged to the outside of the heat exchanger, thereby enabling the elimination of a separate welding point structure, thereby minimizing process defects and simplifying piping, and preventing the refrigerant and oil passing through the evaporator from stagnating in the battery chiller as much as possible, thereby not hindering the heat exchange efficiency and having the effect of transporting the refrigerant to a double pipe / compressor.

[0025]

[0026] Figure 1 is a partial configuration diagram of an air conditioning system according to the prior art.

[0027] Figure 2 is a conceptual diagram of an air conditioning system according to one embodiment of the present invention.

[0028] Figure 3 is a perspective view of a plate heat exchanger according to one embodiment of the present invention.

[0029] Figure 4 is a rear perspective view of a plate heat exchanger according to one embodiment of the present invention.

[0030] Figure 5 is a cross-sectional perspective view of A-A' of Figure 3.

[0031] Figure 6 is a cross-sectional view of Figure 5.

[0032] Figure 7 is a conceptual diagram of the first and second euros according to one embodiment of the present invention.

[0033] Figure 8 is a flow chart of the first and second flow paths according to one embodiment of the present invention.

[0034] Figure 9 is a cross-sectional perspective view of B-B' of Figure 3.

[0035] Figure 10 is a cross-sectional view of Figure 9.

[0036]

[0037] Hereinafter, the technical concept of the present invention will be described in more detail using the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concept of a term to best explain his or her invention, they should be interpreted in a way that aligns with the technical concept of the present invention.

[0038] Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and that there may be various modified examples that can replace them at the time of filing this application.

[0039] Hereinafter, the technical concept of the present invention will be described in more detail using the attached drawings. The attached drawings are merely examples provided to more specifically explain the technical concept of the present invention, and therefore, the technical concept of the present invention is not limited to the form of the attached drawings.

[0040]

[0041] In general, in the air conditioning system of an electric vehicle, it is desirable for the refrigerant passing through the battery chiller to be combined with the refrigerant passing through the evaporator and then introduced into a double pipe or compressor for recycling. At this time, as illustrated in Fig. 1, in the conventional case, a pipe (1) for discharging the refrigerant from each evaporator and a pipe (2) for discharging the refrigerant from the battery chiller are respectively provided, and a joint welded structure (3) is configured so that each discharge pipe (1, 2) is grounded at one point, so that each refrigerant is combined at the joint welded structure (3) and then introduced into the double pipe / compressor through a pipe connected to the double pipe or compressor. At this time, the air conditioning system has the limitation that it must be configured in a complex manner due to the structure of each refrigerant discharge pipe (1, 2) and the joint welded structure (3), and the large number of pipe configurations increases the risk of leakage. In addition, such a complex configuration can cause manufacturing defects, and there are problems such as increased vehicle weight due to the large number of configurations.

[0042]

[0043] Referring to FIG. 2, the present invention is characterized in that it is configured to solve the above-mentioned problem by deleting the joint welding structure and arranging the pipe transporting the evaporator inside the battery chiller, so that the refrigerant discharged from the evaporator and the refrigerant discharged from the battery chiller are combined inside the battery chiller and then introduced into a double pipe or compressor. At this time, the present invention is characterized in that the device performing the function of the battery chiller may be a plate heat exchanger, and includes a structure for combining different refrigerants in the plate heat exchanger.

[0044] A plate heat exchanger may be configured by stacking a plurality of heat exchange plates, and structures such as ribs, channels, and inner fins that can facilitate the flow of fluid may be selectively configured on each of the heat exchange plates as needed. In addition, the plate heat exchanger is characterized in that at least a refrigerant delivered from a condenser can pass therethrough and perform heat exchange. In addition, the plate heat exchanger can be designed so that various fluids can flow through it by designing a flow path as needed, and for example, it can be designed so that two types of fluids, such as coolant and oil, can flow and exchange heat, like a water-cooled oil cooler. At this time, the plate heat exchanger preferably includes a flow path that is separated so that different fluids do not mix when passing through it, and preferably includes an inlet and an outlet through which each fluid can be introduced.

[0045] The plate heat exchanger of the present invention is characterized by including a structure in which refrigerant passing through different devices is combined and then moved inside the plate heat exchanger in order to introduce the refrigerant into a double pipe (14) or a compressor (14). Referring to Fig. 2, the refrigerant discharged from the condenser (11) passes through the expansion valve (12) and then moves to the evaporator (13) or the plate heat exchanger (10). That is, the refrigerant introduced into the evaporator (13) and the refrigerant passing through the condenser (11) and the expansion valve (12) pass through the plate heat exchanger (10). Here, the refrigerant that must be introduced into the double pipe (14) or compressor (14) after heat exchange in the evaporator (13) may be a first heat exchange medium, and the refrigerant that must be introduced into the double pipe (14) or compressor (14) after heat exchange while flowing inside the plate heat exchanger (10) after passing through the expansion valve (12) may be a second heat exchange medium. In addition, the plate heat exchanger (10) may further include a cooling water inlet and a cooling water outlet through which separate cooling water can pass.

[0046] Referring to FIGS. 3 and 4, the plate heat exchanger (10) of the present invention may have a structure in which the plurality of heat exchange plates (100) constituting the plate heat exchanger (10) are laminated with the same plates, or in which the plates through which the refrigerant flows and the plates through which the cooling water flows are separately configured and laminated alternately with each other. At this time, each plate may include a flow path structure having the same or different shapes as needed. In addition, the plate heat exchanger (10) may have a structure in which an upper plate (101) and a lower plate (102) are arranged on the outermost side and the outermost side in the lamination direction of a core in which a plurality of heat exchange plates (100) are laminated. That is, the plate heat exchanger (10) may be formed by laminating a plurality of heat exchange plates (100) between the upper plate (101) and the lower plate (102). At this time, the upper plate (101) may be placed on the other side of the core, and the lower plate (102) may be placed on one side of the core, and these may be positioned and changed as needed. In addition, the upper plate (101) includes a first inlet (110) through which a first heat exchange medium is introduced, and a second inlet (120) through which a second heat exchange medium is introduced, and the lower plate (102) is characterized in that it includes an outlet (130) through which the first heat exchange medium and the second heat exchange medium are combined and discharged to the outside. That is, it is characterized in that an inlet port through which the first heat exchange medium and the second heat exchange medium are introduced is formed in the upper plate (101) arranged on one side in the stacking direction of the heat exchange plate (100), and an outlet port (130) through which the first heat exchange medium and the second heat exchange medium are discharged after being combined is formed in the lower plate (102) arranged on the other side in the stacking direction of the heat exchange plate (100).

[0047] The heat exchange plate (100) may be in the form of a rectangular plate having a length in one direction, and a plurality of heat exchange plates (100) are stacked while facing each other. Accordingly, they are stacked along the surface direction formed on the heat exchange plate (100). In addition, it is preferable that the upper plate (101) and the lower plate (102) also have rectangular shapes corresponding to the heat exchange plate (100). In addition, the heat exchange plate (100) is characterized in that a first inlet (110) and a second inlet (120) are formed separately on the upper plate (101). At this time, some of the refrigerant needs to flow and exchange heat within the plate-type heat exchanger (10), and at this time, it is good for thermal efficiency if the refrigerant flows while contacting the largest possible area within the heat exchange plate (100) on which it is stacked. Therefore, it is preferable that the inlet for introducing at least the heat exchange medium circulating inside the plate heat exchanger (10) among the first heat exchange medium and the second heat exchange medium is arranged at a corner portion of the upper plate (101).

[0048] Referring to FIG. 3, in one embodiment of the present invention, the inlet through which the first heat exchange medium flows in is the first inlet (110), the inlet through which the second heat exchange medium flows in is the second inlet (120), the refrigerant flowing in from the evaporator may be the first heat exchange medium, and the refrigerant circulating inside the plate heat exchanger (10) may be the second heat exchange medium. In addition, the first inlet (110) and the second inlet (120) are preferably arranged at respective corner portions of the upper plate (101). In addition, the first inlet (110) and the second inlet (120) may be arranged at corners that are close to each other among the rectangular plates. That is, the first inlet (110) and the second inlet (120) may be formed at two corners formed on either side of the longitudinal direction, respectively. At this time, as an embodiment of the present invention, a first inlet (110) and a second inlet (120) may be formed at one end in the longitudinal direction of the upper plate (101).

[0049] In addition, referring to FIG. 4, the lower plate (102) includes at least one outlet (130). One of the outlets (130) is characterized in that it can discharge the heat exchange medium circulating inside the plate heat exchanger (10) and also discharge the heat exchange medium received from the evaporator. Therefore, the outlet (130) of the present invention includes a structure in which a first heat exchange medium and a second heat exchange medium are combined inside, so that after the first heat exchange medium and the second heat exchanger are combined inside the plate heat exchanger (10), they are discharged together through the outlet (130). The outlet (130) can be freely selected and arranged at a position as needed on the lower plate (102). At this time, it is preferable that the plate heat exchanger (10) form a long flow path so that the second heat exchange medium circulating inside can flow the heat exchange medium over a wider area. Accordingly, it is preferable that the second inlet (120) and the outlet (130) through which the second heat exchange medium flows in are not arranged on the same vertical line in the stacking direction of the heat exchange plates (100). That is, it is preferable that the outlet (130) is arranged at a different position in the stacking direction with respect to the second inlet (120). In addition, since it is preferable that the first heat exchange medium stagnates as briefly as possible inside the plate heat exchanger (10), it is preferable that the first flow path (140) forms a short flow path. Accordingly, the first inlet (110) through which the first heat exchange medium flows in may be on the same vertical line as the outlet (130).

[0050]

[0051] The plate heat exchanger (10) of the present invention is characterized in that the first heat exchange medium and the second heat exchange medium are combined inside the plate heat exchanger (10) and then introduced into a double pipe or compressor through an outlet (130). Accordingly, it is characterized in that it includes a flow path structure that allows the first heat exchange medium and the second heat exchange medium to pass through a core composed of a plurality of heat exchange plates (100), and each flow path is formed to communicate with each other at a specific location inside the core. That is, by forming the flow path that connects the first heat exchange medium that has circulated through the evaporator to the double pipe or compressor so as to pass through the inside of the plate heat exchanger (10), piping simplification can be achieved. In addition, the second heat exchange medium circulates inside the core, but is combined with the first heat exchange medium at a specific location inside the plate heat exchanger (10), so that a separate welding structure at the combined point can be eliminated, thereby simplifying the air conditioning system.

[0052] Referring to FIG. 2, the plate heat exchanger (10) is characterized by including a first flow path (140) for flowing a first heat exchange medium, and a second flow path (150) for flowing a second heat exchange medium. At this time, the second heat exchange medium may be a refrigerant that circulates and exchanges heat within the plate heat exchanger (10), and thus the second flow path (150) may be formed as a longer flow path that circulates within the plate heat exchanger (10). In addition, since the first heat exchange medium and the second heat exchange medium are refrigerants moved from different devices, they may have different temperature characteristics. Therefore, in order to improve the thermal efficiency of the plate heat exchanger (10), the first heat exchange medium may be formed as a flow path as short as possible so that the first heat exchange medium passes through the plate heat exchanger (10) quickly without stagnating. Therefore, it is preferable that the second flow path (150) be formed longer than the first flow path (140). At this time, each heat exchange plate (100) may include a cooling water flow path through which cooling water passes, and the cooling water flow path may be formed by a cooling water through hole formed in the heat exchange plate (100). However, a detailed description of the cooling water flow path will be omitted.

[0053] To explain in more detail, the plate heat exchanger (10) is a battery chiller, and heat exchange must be performed by the refrigerant flowing over the heat exchange plate (100), and the second heat exchange medium can circulate inside the core. Accordingly, the plate heat exchanger (10) includes a second flow path (150) through which the second heat exchange medium circulates and flows inside, and a first flow path (140) through which the first heat exchange medium passes. At this time, the first heat exchange medium is a refrigerant received from the evaporator, and has different temperature characteristics from the refrigerant of the second heat exchange medium that circulates and exchanges heat in the plate heat exchanger (10). In addition, for thermal efficiency as a battery chiller, the first heat exchange medium and the second heat exchange medium having different characteristics may be combined inside the battery chiller, and may be combined as close to the exhaust port (130) as possible. That is, for the thermal efficiency of the plate heat exchanger (10), it is preferable that the first flow path (140) and the second flow path (150) are connected at the rear end of the battery chiller, which is the possible exhaust port (130) side, so that the first heat exchange medium and the second heat exchange medium are combined inside the plate heat exchanger (10) and then exhausted to the outside through the exhaust port (130). Here, the rear end refers to the lower plate (102) side where the exhaust port (130) is formed.

[0054] The first flow path (140) of the present invention is preferably formed with the shortest distance so as to minimize stagnation within the plate heat exchanger (10). In addition, the first flow path (140) is preferably structured so that the first heat exchange medium flows separately from the second heat exchange medium flowing within the plate heat exchanger (10), and then the rear ends of each first flow path (140) and the second flow path (150) communicate with each other so that the heat exchange medium merges and is then discharged through the discharge port (130). Accordingly, the first flow path (140) of the present invention is characterized in that it is formed as a pipe structure in which the first heat exchange medium can flow independently. In addition, the first flow path (140) of the pipe structure is characterized in that it is formed as a straw structure of a certain length that extends from the first inlet (110) through which the first heat exchange medium flows and has an end disposed on the discharge port (130) side.

[0055] Referring to FIGS. 5 to 7, the first flow path (140) may be a straw structure in the form of a pipe, and may be formed to extend in length from the first inlet (110) so that the first heat exchange medium introduced into the first inlet (110) flows inward. The first flow path (140) is characterized in that one end extends from the first inlet (110) and the other end is formed to be disposed on the side of the outlet (130), so that the first heat exchange medium from the first inlet (110) can flow along the straw structure while being separated from the second heat exchange medium. At this time, the first flow path (140) is characterized in that the portion on the side of the outlet (130) is spaced apart from the outlet (130) by a predetermined distance. That is, the first flow path (140) is characterized in that one end extends from the first inlet (110) and the other end extends in length toward the outlet (130), but the other end of the first flow path (140) is not connected to the outlet (130) so that the extension length is formed before the outlet (130).

[0056] And, in order to have the shortest length, the first flow path (140) is characterized in that the first inlet (110) and the outlet (130) are arranged on the same line in the stacking direction of the heat exchange plates (100). That is, the outlet (130) is formed on the lower plate in a straight line from the first inlet (110) formed on the upper plate, and when the first inlet (110) is formed at one edge of one end of the upper plate, the outlet (130) is also formed at one edge of one end of the lower plate. And, the first flow path (140) is characterized in that it is formed shorter than the length connecting the first inlet (110) and the outlet (130), and the other end is arranged at a distance from the outlet (130). At this time, as illustrated in FIG. 7, the length (L2) of the extended straw of the first flow path (140) is preferably shorter than the straight-line distance (L1) between the first inlet (110) and the outlet (130), and longer than half (L1 / 2) of the straight-line distance. That is, the length (L2) of the first flow path (140) is preferably formed to be extended longer than at least half (L1 / 2) of the distance (L1) from the first inlet (110) to the outlet (130).

[0057] The present invention is characterized in that the second flow path (150) and the first flow path (140) are connected in the gap formed between the first flow path (140) and the outlet (130). However, referring to FIG. 8, the second flow path (150) of the present invention is characterized in that it is formed as a U-turn flow path that flows between the area of ​​the heat exchange plates (100) or between adjacent heat exchange plates (100) so that the second heat exchange medium introduced from the second inlet (120) can remain on the plurality of heat exchange plates (100) for as long as possible in order for the plate heat exchanger (10) to function as a battery chiller. At this time, the first inlet (110) and the second inlet (120) are arranged parallel to each other at corners close to each other, and the outlet (130) is arranged on the same line as the first inlet (110).

[0058] Accordingly, referring to FIGS. 5 to 7, the second flow path (150) of the present invention is characterized by including a flow path (second-second flow path) (152) that flows along at least a portion of the outer circumferential surface of the first flow path (140) connected to the discharge port (130) in order to be connected to the discharge port (130). At this time, as illustrated in FIG. 7, the second-second flow path (152) may be formed by a through hole (162, D2) that has a diameter larger than the diameter (D1) of the first flow path (140) and is continuously formed in the stacking direction of the heat exchange plate (100) along the first flow path (140). Accordingly, the second heat exchange medium flows through the second inlet (120) and circulates inside the core, and later flows along the outer surface of the first flow path (140) through the second-second flow path (152), and is combined with the first heat exchange medium in the gap between the first flow path (140) and the discharge port (130), and then is discharged together through the discharge port (130). In more detail, the second inlet (120) may be arranged at one end of the length direction of the upper plate (101), and may be arranged at each corner of the end in parallel with the first inlet (110). At this time, the heat exchange plate (100) can form a second-second flow path by forming a through hole (162) with a diameter larger than the diameter (D1) of the first flow path (140) in a portion surrounding the first flow path (140) and continuously forming the heat exchange plate (100) along the stacking direction.

[0059] In addition, referring to FIGS. 8 to 10, the second flow path (150) may have a through hole (161) formed in a straight line along the stacking direction on the side of the second inlet (120) to form the second-first flow path (151) on the side of the second inlet (120). The second-first flow path (151) may be formed parallel to the first flow path (140). At this time, the diameters of the through hole (161) forming the second-first flow path (151) and the through hole (162) forming the second-second flow path (151) may be the same or different, and in different cases, it is preferable that the through hole (162) forming the second-second flow path (152) be larger than the through hole (161) forming the second-first flow path (151). Accordingly, the second heat exchange medium flows in the direction of plate stacking along the second-first flow path (151) after flowing into the second inlet (120), and the second heat exchange medium flows horizontally along the area of ​​the heat exchange plate (100) through the through hole (161) of the second-first flow path (151) and can move toward the other end in the longitudinal direction of the plate. In addition, the second heat exchange medium flows along the edge of the plate and then flows again toward the first inlet (110) and then flows into the second-second flow path (152) formed by the through hole (162), so that the second heat exchange medium can flow along the outer circumferential surface of the first flow path (140) and then be discharged to the outside through the discharge port (130).

[0060] Accordingly, the plate heat exchanger (10) of the present invention includes a first passage (140) through which a first heat exchange medium having the above-described characteristics flows, and a second passage (150) through which a second heat exchange medium flows, and is characterized in that the first heat exchange medium and the second heat exchange medium flow through the plate heat exchanger through the first passage (140) and the second passage (150). Referring to Fig. 8, in more detail, the first heat exchange medium received from the evaporator introduced through the first inlet (110) is separated from the second heat exchange medium along a straw structure and moves toward the outlet (130). And, the second heat exchange medium received from the expansion valve is first introduced through the second inlet (120) along the second-first flow path (151), flows along the heat exchange plate (100) and performs heat exchange, and then flows along the outer side of the first flow path (140) by the second-second flow path (152). Thereafter, the second heat exchange medium can be combined with the first heat exchange medium by the gap between the first flow path (140) formed in front of the discharge port (130) and the discharge port (130), and the combined heat exchange medium is discharged through the discharge port (130) and introduced into a double pipe or a compressor.

[0061]

[0062] As described above, the present invention has been described with specific details such as specific components and limited example drawings, but these are provided only to help a more general understanding of the present invention, and the present invention is not limited to the above-described embodiment, and those skilled in the art to which the present invention pertains can make various modifications and variations from this description.

[0063] Therefore, the idea of ​​the present invention should not be limited to the described embodiments, and all things that are equivalent or equivalent to the scope of the patent claims as well as the scope of the patent claims are considered to fall within the scope of the idea of ​​the present invention.

[0064]

[0065] [Explanation of symbols]

[0066] 10: Plate heat exchanger

[0067] 100: Heat exchange plate

[0068] 101: Top plate

[0069] 102: Lower plate

[0070] 110: First inlet

[0071] 120: Second inlet

[0072] 130: exhaust port

[0073] 140: 1st Euro

[0074] 150: Second Euro

Claims

1. In a plate heat exchanger formed by stacking a plurality of heat exchange plates between an upper plate and a lower plate, The upper plate includes a first inlet through which a first heat exchange medium is introduced, and a second inlet through which a second heat exchange medium is introduced. A plate heat exchanger characterized in that the lower plate includes an outlet through which the first heat exchange medium and the second heat exchange medium are combined and discharged to the outside.

2. In paragraph 1, The above plate heat exchanger A first flow path connecting the first inlet and the outlet so that the first heat exchange medium passes through a plurality of the heat exchange plates and exchanges heat; A second passage is included that connects the second inlet and the outlet so that the second heat exchange medium passes through the plurality of heat exchange plates and exchanges heat. A plate heat exchanger characterized in that the first and second flow paths are connected to each other at a specific location.

3. In paragraph 2, A plate heat exchanger characterized in that the first flow path is a straw structure of a certain length extending from the first inlet and having an end positioned on the outlet side.

4. In paragraph 3, The above first flow is a plate heat exchanger characterized in that the end forms a gap of a predetermined distance from the outlet.

5. In paragraph 4, A plate heat exchanger characterized in that the first flow path is connected to the second flow path at the gap formed at the end of the first flow path.

6. In paragraph 3, The above second euro is, A plate heat exchanger characterized in that at least the second heat exchange medium includes a flow path along a portion of the outer circumferential surface of the first flow path.

7. In paragraph 6, A plate heat exchanger characterized in that the first heat exchange medium that has passed through the first flow path and the second heat exchange medium that has flowed along the outer surface of the first flow path are combined at the end of the first flow path and discharged through the outlet.

8. In paragraph 6, The above second euro A plate heat exchanger characterized in that the heat exchange plate includes a passage formed by a through hole having a diameter larger than the diameter of the first passage formed at least in a portion surrounding the first passage.

9. In paragraph 8, The above second euro is, A plate heat exchanger characterized in that the heat exchange plate includes a flow path formed by a through hole continuously formed along the stacking direction of the heat exchange plate from the second inlet.

10. In paragraph 6, The above second euro is, A plate heat exchanger characterized in that the second heat exchange medium introduced through the second inlet is a U-turn flow path that flows through the area of ​​the heat exchange plate or between adjacent heat exchange plates.

11. In paragraph 10, If the second inlet is arranged at any end of the length of the upper plate, The above U-turn euro is a plate heat exchanger characterized in that the second heat exchange medium first flows in the stacking direction of the heat exchange plates, then flows to the other end, then flows along the edge, and then flows to one end.

12. In paragraph 3, A plate heat exchanger, characterized in that the first inlet and the outlet are arranged on the same line in the stacking direction of the heat exchange plates.

13. In paragraph 12, The above first inlet and the above second inlet, A plate heat exchanger characterized in that the upper plate is arranged at corners close to each other.

14. In paragraph 12, The length of the first euro above is, A plate heat exchanger characterized in that the length between the first inlet and the outlet is at least half.

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