KR102523184B1 - Printed circuit type heat exchanger - Google Patents

Abstract

The present invention relates to a printed board type heat exchanger, and according to one aspect of the present invention, a first inlet through which a first fluid flows in, a first outlet through which the first fluid is discharged, and a second fluid into which a body formed with a second inlet and a second outlet through which the second fluid is discharged; and a printed circuit board portion accommodated in the derby and through which the first fluid and the second fluid flow and heat exchange between the first fluid and the second fluid, wherein the printed board portion includes a plurality of flow channels through which the first fluid flows. a first printed circuit board on which two first micro-channels are formed; and a second printed circuit board having a plurality of second micro-channels through which the second fluid flows, wherein the second inlet includes: a second inlet through which the second fluid flows; a plurality of second inlet branch pipes branched from the second inlet pipe; and second inlet valves respectively installed in the plurality of second inlet branch pipes, and between the plurality of branch connector pipes connected to the plurality of second inlet branch pipes and the plurality of branch connector pipes on the second printed board. A heat exchanger may be provided in which a plurality of flow resistance parts are disposed to drop the pressure of the second fluid.

Description

Printed circuit board type heat exchanger {PRINTED CIRCUIT TYPE HEAT EXCHANGER}

The present invention relates to a printed board type heat exchanger, and more particularly, to a printed board type heat exchanger having a micro-channel.

The printed board type heat exchanger is a heat exchanger having a micro-channel, in which a plurality of plate-shaped printed boards are stacked, and a low-temperature fluid and a high-temperature fluid flow through the micro-channel formed on the printed board, so that heat is exchanged between the high-temperature fluid and the low-temperature fluid. It is a device.

This printed board type heat exchanger has a primary side (high temperature part) inlet header and discharge header and a secondary side (low temperature part) inlet header and discharge header. The printed board type heat exchanger has a structure in which fluid is introduced into the inlet header on the primary side and the secondary side, respectively, and the fluid is moved along the micro-channel of the printed board and then discharged to the outside through the discharge header.

A conventional printed circuit board type heat exchanger has one inlet header and one outlet header on both the primary side and the secondary side, and has flow rate and pressure drop characteristics according to the shape of the microchannel, and the flow rate and pressure drop characteristics cannot be changed. Therefore, there is a problem in that flow rate and pressure drop characteristics cannot be changed according to circumstances or different flow rates cannot be formed with the same pressure drop characteristics.

In particular, when a printed board type heat exchanger is used as a steam generator of a nuclear reactor, a flow path formed on a plurality of printed boards forms a multi-channel, which may cause flow instability. In order to suppress this flow instability, a pressure drop may be generated by installing a flow resistance (eg, changing the shape of an orifice or flow path) in the inlet flow path of the secondary side. In this case, the effect is effective when the steam generator is operated at low power. However, in the case of high-power operation, there is a problem in that the pump capacity increases by acting as an additional pressure resistor.

Republic of Korea Patent No. 10-1976543 (2019.05.02.) Republic of Korea Patent No. 10-1927814 (2018.12.05.)

Embodiments of the present invention have been invented in the above background, and to provide a printed board type heat exchanger capable of adjusting flow rate and pressure drop characteristics in order to suppress flow instability when using the printed board type heat exchanger as a steam generator.

According to one aspect of the present invention, a first inlet through which a first fluid is introduced, a first discharge through which the first fluid is discharged, a second inlet through which a second fluid is introduced, and a first inlet through which the second fluid is discharged. Body with 2 discharge parts; and a printed circuit board portion accommodated in the derby and through which the first fluid and the second fluid flow and heat exchange between the first fluid and the second fluid, wherein the printed board portion includes a plurality of flow channels through which the first fluid flows. a first printed circuit board on which two first micro-channels are formed; and a second printed circuit board having a plurality of second micro-channels through which the second fluid flows, wherein the second inlet includes: a second inlet through which the second fluid flows; a plurality of second inlet branch pipes branched from the second inlet pipe; and second inlet valves respectively installed in the plurality of second inlet branch pipes, and between the plurality of branch connector pipes connected to the plurality of second inlet branch pipes and the plurality of branch connector pipes on the second printed board. A heat exchanger may be provided in which a plurality of flow resistance parts are disposed to drop the pressure of the second fluid.

In one embodiment of the present invention, a plurality of second inlet branch pipes are disposed in a second inlet pipe through which fluid flows into a second printed board of a printed board type heat exchanger having a micro-channel, and a second inlet valve is used to provide fluid flow. By adjusting the inflow of the flow path passing through the flow resistance unit, it is possible to adjust the capacity of the feed water pump.

In addition, by optimizing the capacity of the water pump supplied to the second printed circuit board in this way, since unnecessary pressure drop does not occur in the heat exchanger, the power required for operating the water pump can be reduced, thereby increasing the power generation efficiency of the nuclear power plant. there is.

1 is a view showing a heat exchanger according to a first embodiment of the present invention.
2 is a view showing a first printed board of a heat exchanger according to a first embodiment of the present invention.
3 is a view showing a second printed board of the heat exchanger according to the first embodiment of the present invention.
4 is a view showing a printed circuit board of a heat exchanger according to a second embodiment of the present invention.
5 is a view showing a second printed board of a heat exchanger according to a second embodiment of the present invention.
6 is a view for explaining the connection of the flow path resistance part of the second printed circuit board of the heat exchanger according to the third embodiment of the present invention.
7 is a view for explaining the connection of the flow path resistance part of the second printed circuit board of the heat exchanger according to the fourth embodiment of the present invention.
8 is a view for explaining the connection of the flow resistance part of the second printed board of the heat exchanger according to the fifth embodiment of the present invention.
9 is a view for explaining the connection of the flow path resistance part of the second printed circuit board of the heat exchanger according to the sixth embodiment of the present invention.

Hereinafter, specific embodiments for implementing the present invention will be described in detail with reference to the drawings.

In addition, in the description of the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

In addition, when a component is referred to as 'connecting', 'supporting', 'connecting', 'supplying', 'transferring', or 'contacting' to another component, it is directly connected to, supported by, or connected to the other component. It may be supplied, delivered, or contacted, but it should be understood that other components may exist in the middle.

Terms used in this specification are only used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In addition, in this specification, expressions such as upper, lower, side, etc. are described based on the drawings, and it is made clear in advance that they may be expressed differently if the direction of the object is changed. For the same reason, some components in the accompanying drawings are exaggerated, omitted, or schematically illustrated, and the size of each component does not entirely reflect the actual size.

In addition, terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by these terms. These terms are only used to distinguish one component from another.

As used herein, the meaning of "comprising" specifies specific characteristics, regions, integers, steps, operations, elements, and/or components, and other specific characteristics, regions, integers, steps, operations, elements, elements, and/or groups. does not exclude the presence or addition of

Referring to FIGS. 1 to 3 , a printed board type heat exchanger 10 according to a first embodiment of the present invention will be described. The printed board type heat exchanger 10 according to the first embodiment of the present invention includes a body 100, a first inlet 110, a first outlet 120, a second inlet 130, and a second outlet. 140 , a first printed board 151 and a second printed board 153 .

The body 100 may include a housing providing an overall appearance of the printed board type heat exchanger 10 and a frame supporting other components. The body 100 may accommodate the printed board unit 150 .

In the printed board type heat exchanger 10, a high-temperature fluid and a low-temperature fluid may flow into the body 100 and exchange heat with each other. Hereinafter, the high-temperature fluid is referred to as a first fluid, and the low-temperature fluid is referred to as a second fluid. Also, the first fluid may be relatively hot reactor coolant, and the second fluid may be relatively cold water.

In addition, the first fluid may be cooled to a low temperature by exchanging heat with the second fluid and discharged from the body 100, and the second fluid may be heated to a high temperature by exchanging heat with the first fluid and discharged from the body 100.

The first inlet 110 is disposed on one side of the body 100, and the first fluid flows into the body 100. The first inlet 110 allows the first fluid introduced into the body 100 to be supplied to the first printed board 151, and the first inlet 110 includes the first inlet pipe 111 and A first inlet header 113 is included.

As shown in FIG. 2 , the first inlet pipe 111 is a passage through which the first fluid flows into the body 100 . The first fluid introduced through the first inlet pipe 111 may flow into the first inlet header 113 .

The first inflow header 113 distributes the first fluid to the first microchannel 151a formed in the first printed circuit board 151 . The first inlet header 113 may have a predetermined space so that the first fluid introduced through the first inlet pipe 111 flows into the first microchannel 151a.

The first discharge part 120 is disposed on the other side of the body 100, is disposed at a position opposite to the first inlet part 110, and the first fluid is discharged from the body 100 to the outside. The first discharge unit 120 allows the first fluid to be discharged from the first printed board 151, and the first discharge unit 120 includes a first discharge pipe 121 and a first discharge header 123. do.

As shown in FIG. 2 , the first discharge pipe 121 is a passage through which the first fluid is discharged from the body 100 to the outside.

The first discharge header 123 is a space in which the first fluid passing through the first micro-channel 151a formed on the first printed circuit board 151 gathers, and may be a space having a predetermined size. The first fluid collected in ) may be discharged to the outside through the first discharge pipe 121 .

The second inlet 130 is disposed on one side of the surface forming the body 100, and the second fluid flows into the body 100. The second inlet 130 allows the second fluid introduced into the body 100 to be supplied to the second printed board 153, and the second inlet 130 includes a second inlet pipe 131, It includes a second inlet branch pipe 133, a second inlet valve 135, a second inlet header 137 and a flow resistance part 154.

As shown in FIG. 3 , the second inlet pipe 131 is a passage through which the second fluid flows into the body 100 . The second fluid introduced through the second inlet pipe 131 may flow into the second printed board 153 .

As shown in FIG. 3 , a plurality of second inlet branch pipes 133 are provided. The plurality of second inlet branch pipes 133 may be disposed branched off from the second inlet pipe 131 .

The second inlet valve 135 is installed in the second inlet branch pipe 133 . As the second inlet branch pipe 133 is provided in plurality, a plurality of second inlet valves 135 may also be provided. That is, the plurality of second inlet valves 135 are installed in the plurality of second inlet branch pipes 133 .

The second inlet header 137 is installed in the second inlet branch pipe 133 and is provided to allow the second fluid introduced through the second inlet branch pipe 133 to flow into the second printed board 153 . As shown in FIG. 3 , a plurality of such second inlet headers 137 may be provided.

The second discharge part 140 is disposed on the other side of the surface forming the body 100, is disposed at a position opposite to the second inlet part 130, and the second fluid is discharged from the body 100 to the outside. The second discharge unit 140 allows the second fluid to be discharged from the second printed board 153, and the second discharge unit 140 includes a second discharge pipe 141 and a second discharge header 143. do.

As shown in FIG. 3, the second discharge pipe 141 is a passage through which the second fluid is discharged from the body 100 to the outside.

The second discharge header 143 is a space in which the second fluid passing through the second micro-channel 153a formed on the second printed circuit board 153 gathers, and may be a space having a predetermined size. The second fluid collected in ) may be discharged to the outside through the second discharge pipe 141 .

As shown in FIGS. 1 to 3 , the printed board unit 150 is disposed inside the body 100, and the first fluid and the second fluid move so that heat exchange can be performed between the first fluid and the second fluid. there is. The printed board unit 150 includes a first printed board 151 and a second printed board 153 .

The first printed circuit board 151 has a plate shape, and a plurality of first microchannels 151a having a groove shape through which the first fluid can move may be formed on one surface. The plurality of first microchannels 151a may be formed in a predetermined pattern so that the first fluid introduced through the first inlet 110 flows. Also, the first fluid that has passed through the plurality of first microchannels 151a may be discharged to the outside through the first discharge unit 120 .

The second printed circuit board 153 has a plate shape, and a plurality of second microchannels 153a having a groove shape through which the second fluid can move may be formed on one surface. The plurality of second microchannels 153a may be formed in a predetermined pattern so that the second fluid introduced through the second inlet 130 flows. In addition, the second fluid passing through the plurality of second micro-channels 153a may be discharged to the outside through the second discharge unit 140 .

Here, a plurality of first printed boards 151 and a plurality of second printed boards 153 may be provided, and the plurality of first printed boards 151 and the plurality of second printed boards 153 are alternately laminated with each other. It can be.

In the second printed circuit board 153, a branch connector 153b and a flow resistance part 154 are formed to be connected to the second microchannel 153a together with the second microchannel 153a.

As shown in FIG. 3 , a plurality of branch connection pipes 153b may be formed, each having a predetermined width. The plurality of branch connectors 153b may be disposed at positions corresponding to the plurality of second inlet headers 137, and may be smaller than the width of the plurality of second inlet headers 137.

That is, the branch connector 153b is disposed at the end of the second printed circuit board 153 . Accordingly, the second fluid may flow into the branch connection pipe 153b from the side of the second printed board 153 through the plurality of second inlet headers 137 .

At least one flow resistance part 154 may be formed and may be disposed between the plurality of branch connectors 153b, and the second fluid passing through the plurality of branch connectors 153b may move while receiving a predetermined resistance. can have a structure with For example, the flow resistance part 154 may have a relatively smaller width than the branch connector 153b or may have a shape in which the width of the flow path decreases or expands in one direction. Alternatively, the flow resistance part 154 may have a zigzag shape, may have a serpentine shape, and may have various shapes capable of changing the pressure drop.

For example, as shown in FIG. 3 , when five branch connectors 153b are formed, four flow resistance parts 154 may be formed between the five branch connectors 153b. The four flow resistance parts 154 thus formed may have the same shape, but are not limited thereto and may have different shapes. In addition, some of the four flow resistance parts 154 may have the same shape, and others may have different shapes.

As described above, as the flow resistance part 154 is formed, the pressure of the second fluid flowing into the second printed board 153 can be variably adjusted. For example, by individually controlling the opening and closing of the plurality of inlet valves disposed in the plurality of second inlet branch pipes 133, the second fluid flowing into the second micro-channel 153a of the second printed circuit board 153 Pressure can be regulated.

Here, the plurality of second inlet valves 135 are described as an example in which five are disposed in the drawing, but the number of second inlet valves 135 may vary according to need. For example, when two inlet valves are disposed, the pressure drop characteristic of the second fluid may be adjusted in three cases in which one of the two inlet valves is selectively opened or both are opened.

Meanwhile, in addition to these configurations, the second embodiment of the present invention will be described. Hereinafter, a second embodiment will be described with reference to FIGS. 4 and 5 . In describing the second embodiment of the present invention, differences from the above-described embodiments will be mainly described, and the same description and reference numerals refer to the above-described embodiments.

Also, as shown in FIGS. 4 and 5, a heat exchanger 10 according to a second embodiment of the present invention will be described. The heat exchanger 10 according to the first embodiment of the present invention includes a body 100, a first inlet 110, a first outlet 120, a second inlet 130, and a second outlet 140. ), a first printed board 151 and a second printed board 153 are included. In this embodiment, the second inlet header 137 is formed inside the second printed board 153 .

The second inlet header 137 may be formed inside the second printed circuit board 153 and may have a shape of a groove or hole having a predetermined width. As shown in FIG. 5 , the second inlet header 137 is formed at a position adjacent to the edge of the second printed circuit board 153 and is disposed while being connected to the branch connector 153b. Here, the second inlet header 137 may have a relatively larger width than the branch connection pipe 153b.

A plurality of second inlet headers 137 are formed on one second printed board 153 and may be connected to a plurality of branch connectors 153b formed on the second printed board 153, respectively.

In addition, the second inlet header 137 is formed on each of the plurality of second printed boards 153, and the second inlet header 137 formed on each of the plurality of second printed boards 153 may be connected to each other in a vertical direction. It may have the shape of a hole so that Here, as the plurality of first printed boards 151 and the plurality of second printed boards 153 are alternately stacked, the plurality of first printed boards 151 have predetermined positions corresponding to the second inlet headers 137. A hole of may be formed.

In addition, as the second inlet header 137 is formed inside the second printed board 153, the second inlet pipe 131 is formed on a plurality of first printed boards 151 or a plurality of second printed boards 153. It may be connected to one surface of the first printed board 151 or the second printed board 153 disposed on the outermost side of the stacked printed board unit 150 .

Meanwhile, other than these configurations, the third to sixth embodiments of the present invention will be described. Hereinafter, a second embodiment will be described with reference to FIGS. 6 and 7 . In describing the third to sixth embodiments of the present invention, differences from the above-described embodiments will be mainly described, and the same descriptions and reference numerals refer to the above-described embodiments.

In the third to sixth embodiments of the present invention shown in FIGS. 6 to 9, the position where the flow resistance part 154 is formed and the position where the branch connector 153b is formed on the second printed circuit board 153 Shows an example of a modified version of .

First, a third embodiment of the present invention shown in FIG. 6 will be described. In the heat exchanger 10 according to the third embodiment of the present invention, the flow resistance part 154 is disposed on the second printed circuit board 153, and the flow resistance part 154 includes the first flow resistance 154a and the eighth flow resistance part 154. A flow resistance 154h is included.

The first flow resistance 154a and the second flow resistance 154b are respectively disposed in the branch connectors 153b connected to the two second inlet branch pipes 133 among the five second inlet branch pipes 133, A third flow resistance 154c and a fourth flow resistance 154d are disposed on the branch connection pipe 153b connected to the other two second inlet branch pipes 133, respectively.

A fifth flow resistance 154e is disposed on the branch connection pipe 153b where the branch connector 153b on which the first flow resistance 154a and the second flow resistance 154b are disposed are joined, and the third flow resistance ( 154c) and the fourth flow resistance 154d are disposed on the branch connection pipe 153b where the branch connection pipe 153b is joined.

A seventh flow resistance 154g is disposed on the branch connection pipe 153b where the fifth flow resistance 154e and the branch connection pipe 153b on which the sixth flow resistance are disposed are joined.

In addition, an eighth flow resistance 154h is disposed in the second inlet branch 133 of the remaining one of the five second inlet branch pipes 133 . The branch connector 153b on which the seventh flow resistance 154g is disposed and the branch connection tube 153b on which the eighth flow resistance 154h is disposed are connected to the second microchannel 153a.

As described above, as the first to eighth flow resistances 154a, 154b, 154c, 154d, 154e, 154f, 154g, and 154h are disposed, the first to eighth flow resistances 154a, 154b, 154c, 154d, 154e, The pressure of the second fluid flowing into the second microchannel 153a may be adjusted by 154f, 154g, and 154h.

Here, when the second fluid is all introduced through the five second inlet branch pipes 133, the seventh flow resistance 154g, the fifth flow resistance 154e, the first flow resistance 154a, and the second flow path The flow resistance may be large in the order of the resistor 154b, the sixth flow resistance 154f, the third flow resistance 154c, the fourth flow resistance 154d, and the eighth flow resistance 154h. The flow resistance of the first to eighth flow resistances 154a, 154b, 154c, 154d, 154e, 154f, 154g, and 154h may vary depending on which one of the five second inlet valves 135 is opened or closed. The size of the flow resistance may vary according to the shape of the first to eighth flow resistances 154a, 154b, 154c, 154d, 154e, 154f, 154g, and 154h.

Referring to FIG. 7, a heat exchanger 10 according to a fourth embodiment of the present invention will be described. In the heat exchanger 10 according to the fourth embodiment of the present invention, the flow resistance part 154 is disposed on the second printed circuit board 153, and the flow resistance part 154 includes the first flow resistance 154a and the seventh flow resistance part 154. A flow resistance 154g is included.

The first flow resistance 154a and the second flow resistance 154b are respectively disposed in the branch connectors 153b connected to the two second inlet branch pipes 133 among the five second inlet branch pipes 133, A third flow resistance 154c and a fourth flow resistance 154d are disposed on the branch connection pipe 153b connected to the other two second inlet branch pipes 133, respectively.

A fifth flow resistance 154e is disposed on the branch connection pipe 153b where the branch connector 153b on which the first flow resistance 154a and the second flow resistance 154b are disposed are joined, and the third flow resistance ( 154c) and the fourth flow resistance 154d are disposed on the branch connection pipe 153b where the branch connection pipe 153b is joined.

A seventh flow resistance 154g is disposed in the second inlet branch 133 of the remaining one of the five second inlet branch pipes 133 . And the branch connector 153b in which the fifth flow resistance 154e is disposed, the branch connector 153b in which the sixth flow resistance 154f is disposed, and the branch connector 153b in which the seventh flow resistance 154g is disposed. ) are combined and connected to the second microchannel 153a.

As described above, as the first to seventh flow resistances 154a, 154b, 154c, 154d, 154e, 154f, and 154g are disposed, the first to seventh flow resistances 154a, 154b, 154c, 154d, 154e, 154f, 154g), the pressure of the second fluid flowing into the second microchannel 153a may be adjusted.

Here, when the second fluid is all introduced through the five second inlet branch pipes 133, the fifth flow path resistance 154e, the first flow resistance 154a, the second flow resistance 154b, and the sixth flow path The flow resistance may be large in the order of the resistor 154f, the third flow resistance 154c, the fourth flow resistance 154d, and the seventh flow resistance 154g. The flow resistance of the first to seventh flow resistances 154a, 154b, 154c, 154d, 154e, 154f, and 154g may vary depending on which one of the five second inlet valves 135 is opened or closed. Further, the size of the flow resistance may vary depending on the shape of the first to seventh flow resistances 154a, 154b, 154c, 154d, 154e, 154f, and 154g.

Referring to FIG. 8, a heat exchanger 10 according to a fifth embodiment of the present invention will be described. In the heat exchanger 10 according to the fifth embodiment of the present invention, the flow resistance part 154 is disposed on the second printed board 153, and the flow resistance part 154 includes the first flow resistance 154a and the fifth flow resistance part 154. A flow resistance 154e is included.

Between the branch connectors 153b connected to the four second inlet branch pipes 133 among the five second inlet branch pipes 133, the first flow resistance 154a, the second flow resistance 154b and the third flow path Resistors 154c are disposed, respectively, and the first flow resistance 154a and the first flow resistance 154a and the first flow resistance 154a of the branch connector 153b passing through the second flow resistance 154b and the third flow resistance 154c A fourth flow resistance 154d is disposed on the branch connector 153b coupled between the two flow resistances 154b.

Also, a fifth flow resistance 154e is disposed in the second inlet branch pipe 133 of the remaining one of the five second inlet branch pipes 133 . The branch connector 153b on which the fourth flow resistance 154d is disposed and the branch connection tube 153b on which the fifth flow resistance 154e is disposed are connected to the second microchannel 153a.

Here, when the second fluid is all introduced through the five third inlet branch pipes, the fourth flow resistance 154d, the third flow resistance 154c, the second flow resistance 154b, and the first flow resistance 154a ) and the fifth flow resistance 154e, the flow resistance may be large. The flow resistance of the first to fifth flow resistances 154a, 154b, 154c, 154d, and 154e may vary depending on which one of the five second inlet valves 135 is opened or closed. The size of the flow resistance may vary according to the shape of the first to fifth flow resistance 154a, 154b, 154c, 154d, and 154e.

Referring to FIG. 9, a heat exchanger 10 according to a sixth embodiment of the present invention will be described. In the heat exchanger 10 according to the sixth embodiment of the present invention, the flow resistance part 154 is disposed on the second printed circuit board 153, and the flow resistance part 154 includes the first flow resistance 154a and the fifth flow resistance part 154. A flow resistance 154e is included.

The first to fifth flow resistances 154a, 154b, 154c, 154d, and 154e are respectively disposed in the branch connection pipe 153b connected to each of the five second inlet branch pipes 133. In addition, the branch connectors 153b in which the first to fifth flow resistances 154a, 154b, 154c, 154d, and 154e are disposed are all joined together and connected to the second microchannel 153a.

As described above, as the first to fifth flow resistances 154a, 154b, 154c, 154d, and 154e are disposed, the second microchannel is formed by the first to fifth flow resistances 154a, 154b, 154c, 154d, and 154e. The pressure of the second fluid flowing into (153a) may be adjusted.

Here, when the second fluid is all introduced through the five second inlet branch pipes 133, the first flow resistance 154a, the second flow resistance 154b, the third flow resistance 154c, and the fourth flow path The flow resistance may be large in the order of the resistor 154d and the fifth flow resistance 154e. The flow resistance of the first to fifth flow resistances 154a, 154b, 154c, 154d, and 154e may vary depending on which one of the five second inlet valves 135 is opened or closed. The size of the flow resistance may vary according to the shape of the first to fifth flow resistance 154a, 154b, 154c, 154d, and 154e.

Although the embodiments of the present invention have been described as specific embodiments, this is merely an example, and the present invention is not limited thereto, and should be construed as having the widest scope according to the embodiments disclosed herein. A person skilled in the art may implement a pattern of a shape not indicated by combining/substituting the disclosed embodiments, but this also does not deviate from the scope of the present invention. In addition, those skilled in the art can easily change or modify the disclosed embodiments based on this specification, and it is clear that such changes or modifications also fall within the scope of the present invention.

10: heat exchanger
100: body 110: first inlet
111: first inlet pipe 113: first inlet header
120: first discharge unit
121: first discharge pipe 123: first discharge header
130: second inlet
131: second inlet pipe 133: second inlet branch pipe
135: second inlet valve 137: second inlet header
140: second discharge unit
141: second discharge pipe 143: second discharge header
150: printed board unit
151: first printed board 151a: first microchannel
153: second printed board
153a: second micro-channel 153b: branch connector
154: flow resistance part
154a: first flow resistance 154b: second flow resistance
154c: third flow resistance 154d: fourth flow resistance
154e: 5th flow resistance 154f: 6th flow resistance
154g: 7th flow resistance 154h: 8th flow resistance

Claims (10)

a body formed with a first inlet through which a first fluid is introduced, a first discharge through which the first fluid is discharged, a second inlet through which a second fluid is introduced, and a second discharge through which the second fluid is discharged; and
A printed circuit board portion accommodated in the body and through which the first fluid and the second fluid flow and heat exchange between the first fluid and the second fluid;
The printed board part,
a first printed circuit board having a plurality of first micro-channels through which the first fluid flows; and
A second printed circuit board having a plurality of second micro-channels through which the second fluid flows;
The second inlet,
a second inlet pipe through which the second fluid flows;
a plurality of second inlet branch pipes branched from the second inlet pipe;
second inlet valves installed in each of the plurality of second inlet branch pipes and selectively opened and closed; and
A plurality of second inlet headers disposed on one side of the second printed board and connected to the plurality of second inlet branch pipes, respectively;
In the second printed board, a plurality of branch connection pipes connected to the plurality of second inlet branch pipes and a plurality of flow resistance parts disposed between the plurality of branch connection pipes to drop the pressure of the second fluid are formed,
The plurality of second inlet headers,
Connected to at least some of the plurality of branch connection pipes so that the second fluid introduced through the plurality of second inlet branch pipes flows into the plurality of branch connection pipes,
heat exchanger. According to claim 1,
The plurality of branch connectors,
a first branch connection pipe connected to one of the plurality of second inlet branch pipes and communicating with the plurality of second micro-channels so that the second fluid flows into the plurality of second micro-channels; and
Including a plurality of second branch connection pipes connected to other parts of the plurality of second inlet branch pipes and communicating with the first branch connection pipe so that the second fluid flows into the first branch connection pipe,
heat exchanger. delete According to claim 1,
Each of the plurality of flow resistance parts is formed to have a relatively smaller width than the plurality of branch connectors,
heat exchanger. According to claim 1,
The plurality of flow resistance parts have at least one shape of a shape in which the width decreases in one direction, a shape in which the width increases in one direction, a zigzag shape, and a serpentine shape,
heat exchanger. According to claim 1,
The plurality of flow resistance parts have different shapes,
heat exchanger. According to claim 1,
The plurality of branch connectors in which the plurality of flow resistance units are disposed are laminated to each other and connected to the second microchannel,
heat exchanger. According to claim 7,
The flow resistance of the plurality of flow resistance parts is different from each other according to the position where the plurality of flow resistance parts are disposed.
heat exchanger. According to claim 1,
The second fluid flowing into the second printed board through a plurality of branch connection pipes flows into the second microchannel through at least one flow resistance part,
heat exchanger. According to claim 1,
The plurality of first microchannels and the plurality of second microchannels are each formed to have a predetermined pattern.
heat exchanger.

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