WO2016190562A1

WO2016190562A1 - Heat exchanger for evaporative cooler for desiccant cooling

Info

Publication number: WO2016190562A1
Application number: PCT/KR2016/004694
Authority: WO
Inventors: 진원재; 한재현; 이동근
Original assignee: 주식회사 경동나비엔
Priority date: 2015-05-27
Filing date: 2016-05-04
Publication date: 2016-12-01
Also published as: KR20160141016A

Abstract

The aim of the present invention is to provide a heat exchanger for an evaporative cooler for desiccant cooling, whereby it is possible to improve the heat-exchange performance by preventing the phenomenon of water condensation due to residual water on a wet-channel fin. In order to achieve the above aim, the present invention concerns a heat exchanger for an evaporative cooler for desiccant cooling which has at least one dry channel and at least one wet channel and in which the heat exchange takes place between the dry channel and the wet channel, wherein: the wet channel has a wet-channel fin which is formed so as to have a flow-path space where air flows, and on which evaporation takes place by means of contact with evaporation water that has been supplied thereto; and the wet channel fin comprises a unitary fin unit incorporating a pair of fin bodies that face each other, and a fin-body-linking section for linking together the upper end parts of the pair of fin bodies, and, formed in one or other of the fin bodies in the pair of fin bodies, there is a cut-away section in the shape of a cut-away in an edge part thereof located at the end of a flow pathway for the air.

Description

Heat exchanger of evaporative cooler for dehumidification cooling

The present invention relates to a heat exchanger of a dehumidification cooling evaporative cooler, and more particularly, to a heat exchanger of a dehumidification cooling evaporative cooler capable of preventing water condensation on a fin provided in a wet channel.

An air conditioner, which is a commonly used cooling and dehumidifying device, uses a refrigerant and is recognized as a major culprit of ozone layer destruction and global warming due to leakage of the refrigerant. In consideration of the problem of using the refrigerant, energy ventilators have been developed to reduce the ventilation load through the sensible and latent heat transfer between indoor exhaust and outdoor intake air.

However, the conventional ventilators have a problem that the latent heat recovery rate is significantly lower than the sensible heat recovery rate and cannot cope with an increase in cooling load. In consideration of the problems of the conventional energy ventilator, regenerative evaporative cooling technology has been developed.

Regenerative evaporative cooling technology lowers the temperature of the air by using the evaporative cooling effect of water, and solves the problems of the existing air conditioner because it does not use a refrigerant other than water, and has the advantage of sufficiently reducing the cooling load. have.

Such an evaporative cooler continuously forms the wet channel and the dry channel, and has a configuration of supplying cooled air to the room through the dry channel through heat exchange by evaporation in the wet channel, and increasing the contact area. In order to use a repeatedly bent fin (fin).

As a prior art in which such an evaporative cooler appeared, there is a Republic of Korea Patent No. 10-1055668 (Core module of regenerative evaporative cooler and its manufacturing method, registered on August 3, 2011).

The prior art includes a unit module in which the dry channel unit and the wet channel unit are repeatedly arranged and bonded, and a wet channel guide duct formed at an outlet side of the wet channel unit to separate the air duct and the indoor air. It is characterized in that it further comprises a coupling portion to fit inside or outside the wet channel portion.

The dry channel part and the wet channel part are provided with a dry channel pin and a wet channel pin having a cross-section. The wet channel pin is hydrophilic coated to allow evaporated water to spread well, In order to supply the evaporated water is supplied 6 to 7 times more than the amount of evaporated water, and the remaining water that is not evaporated passes through the wet channel part is collected in the tank and then recycled.

However, in the case of the wet channel pins, when the wet channel pins are bent so that the waveform becomes dense, the evaporation area is increased to improve the performance of the evaporative cooler, but the residual water that has not evaporated flows down the surface of the wet channel pins and then wets. At the end of the channel pin, the phenomenon occurs due to surface tension.

As such, when water condensation occurs in the residual water, it hinders the flow of air passing through the wet channel part, thereby degrading the heat exchange performance of the evaporative cooler.

The present invention has been made to solve the above-mentioned problems, to provide a heat exchanger of the dehumidification cooling evaporative cooler that can improve the heat exchange performance by preventing water condensation due to residual water in the wet channel fins. There is this.

Dehumidification cooling evaporative cooler of the present invention for achieving the above object, the heat exchanger of the dehumidification cooling evaporative cooler having at least one dry channel and at least one wet channel, the heat exchange between the dry channel and the wet channel Here, the wet channel is provided with a wet channel fin (70) to form a flow path space through which air flows, and evaporation occurs by contact with the supplied evaporated water; The

wet channel pins

70, 170, and 270 may include a pair of

pin bodies

71, 72; 171, 172; 271 and 272 facing each other, and a pin connecting upper ends of the pair of

pin bodies

71, 72, 171, 172, 271 and 272 to each other. Unit pin units (71, 72, 73; 171, 172, 173; 271, 272, 273) consisting of the body connection portion (73, 173, 273), but any one of the pair of pin bodies (71, 72; 171, 172; 271, 272) is in the pin body (72, 172, 272) The

incisions

75, 175, and 275 of the cut shape are formed at the end positioned at the end of the flow path of the air.

The

wet channel pins

70, 170, 270 are connected to a plurality of

unit pin units

71, 72, 73; 171, 172, 173; 271, 272, 273 in a direction parallel to the longitudinal direction thereof, and thus, the

unit pin units

71, 72, 73 are connected. 171, 172, 173; 271, 272, 273 may have a waveform in a direction perpendicular to the longitudinal direction.

The

cutouts

75, 175, and 275 may have a round or polygonal shape.

The

fin bodies

171 and 172 of the wet channel pin 170 may have irregularities 174a and 175a formed to have a cross section of a waveform along a longitudinal direction.

A plurality of

louvers

274a and 274b are formed in the

fin bodies

271 and 272 of the wet channel fins 270 along the longitudinal direction, so that the air passes through the

cutouts

274c and 274d of the

louvers

274a and 274b. It may be flowing.

The

fin bodies

71 and 72 of the wet channel are formed with a plurality of

slits

74a and 74b at regular intervals along the longitudinal direction, and the fin bodies adjacent to each other with the

slits

74a and 74b therebetween ( 71a, 71b and 72a, 72b may protrude in opposite directions as directions perpendicular to the longitudinal direction, such that the air flows through the

slits

74a and 74b.

The wet channel may include a pair of

barrier plates

20 and 30 facing each other; The wet channel pins (70) positioned between the pair of partition plates (20, 30) and located in the center portion; Located at the edge of the pair of

barrier plates

20 and 30, it may be composed of flow path guides (60a, 60b) for determining the flow direction of the air.

According to the present invention, it is possible to improve the heat exchange performance by forming a cutout at the end of the wet channel fin to prevent the build-up of residual water.

In addition, the slit is formed in the wet channel fins, and the fin bodies adjacent to each other based on the slit are protruded in the opposite directions as the directions perpendicular to the longitudinal direction of the wet panel fins, thereby increasing the flow path of air to improve heat exchange performance. You can.

In addition, the wet channel fins are formed with irregularities or louvers along the longitudinal direction, thereby increasing heat transfer area, thereby improving heat exchange performance.

1 is a perspective view showing a heat exchanger according to an embodiment of the present invention

2 is an exploded perspective view of the heat exchanger of FIG.

3 is a view showing the configuration of the wet channel in the heat exchanger of FIG.

4 is a perspective view showing the wet panel pin shown in FIG.

5 is an enlarged perspective view showing the wet channel pins shown in FIG. 4 from different angles;

6 is a front view showing the wet channel pins shown in FIG.

7 is a plan view showing the wet channel pin shown in FIG.

8 is a view showing a wet channel pin according to another embodiment of the present invention.

9 is a view showing a wet channel pin according to another embodiment of the present invention.

** Explanation of Codes **

10, 20, 30, 40:

partition plate

11, 21, 31, 41: protrusion

50a, 50b:

first euro guide

60a, 60b: second euro guide

70,170,270: Wet channel pin 71,171,271: First pin body

72,172,272: second pin body 73,173,273: pin body connection

74a, 74b: Slit 75,175,275: Incision

80: dry channel fin 100: heat exchanger

174a, 174b: Unevenness 274a, 274b, 274-1a, 274-1b: Louver body

274c, 274d: Opening DC: Gun Channel

WC: Wet Channel

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 will be described the overall configuration of the heat exchanger of the dehumidification cooling evaporative cooler of the present invention.

The heat exchanger 100 may include the first to

fourth partition plates

10, 20, 30, and 40, between the first partition plate 10 and the second partition plate 20, and the third partition plate 30. It is formed between the fourth partition plate 40, the dry channel (DC), the indoor air flows, formed between the second partition plate 20 and the third partition plate 30, the additional air flows and at the same time evaporated water It consists of a wet channel (WC) where evaporation takes place.

The first to fourth partition plate (10, 20, 30, 40) is made of a thin plate-like, the overall shape is made of an octagonal shape in which a vertex portion is cut in a rhombus shape.

The first partition 11 includes a plurality of first projections 11, the second partition 20 includes a plurality of second projections 21, and the third partition 30 has a plurality of third projections 31. ), A plurality of third protrusions 41 are formed in the fourth partition plate 40.

Some of the plurality of first protrusions 11 of the first barrier plate 10 protrude in the right direction from the right side of the first barrier plate 10, and the other of the plurality of first protrusions 11 is the first barrier rib. It protrudes from the left side of the board 10 to a left direction.

Some of the plurality of second protrusions 21 of the second barrier plate 10 protrude in the right direction from the right side of the second barrier plate 20, and the other of the plurality of second protrusions 21 is the second barrier rib. It protrudes from the left side of the board 20 to the left direction.

Similarly, some of the

protrusions

31 and 41 of the third and

fourth barrier plates

30 and 40 also protrude in the right direction from the right side of each of the

barrier plates

30 and 40, and the

protrusions

31 and 41. The rest of) is protruded in the left direction from the left side of each partition plate (30, 40).

In this case, some of the

protrusions

11 and 21 which protrude in a direction facing each other among the first protrusion 11 of the first barrier plate 10 and the second protrusion 21 of the second barrier plate 20 face each other. The parts may be configured to be in contact with each other, and the

protrusions

21, 31, and 41 that face each other of the remaining

partition plates

20, 30, and 40 may also be configured to be in contact with each other. When the

protrusions

11, 21, 31, and 41 are configured to be in contact with each other, the flow of air can be guided and

adjacent partition walls

10 and 20 are supported by each other, thereby providing The deformation can be prevented.

The third partition plate 30 has the same shape as the first partition plate 10, and the fourth partition plate 40 has the same shape as the second partition plate 20.

The gun channel DC has a pair of first flow guides 50a positioned to face the edges of the first partition plate 10 and the second partition wall 20 so as to guide the flow direction of indoor air. 50b), a gun channel pin 80 is disposed between the pair of first flow guides 50a and 50b.

The first flow guides 50a and 50b prevent the air passing through the gun channel DC from leaking to the outside of the heat exchanger, and the air flows to the left lower direction of the gun channel fin 80 (refer to FIG. 2). ) Guides to the upper right side of the gun channel pin 80.

For example, the gun channel pin 80 may be formed in a shape in which a cross section is formed in a wave shape to increase a surface area so that a smooth heat exchange may be performed. The air introduced into the dry channel DC passes through the dry channel pin 80 upwards from the lower side, and heat exchanges with the wet channel WC to decrease the temperature and flow into the room.

The wet channel (WC) is a heat exchange with the air passing through the dry channel (DC) while the addition and the evaporated water is introduced, so as to face the edges of the second partition plate 20 and the third partition plate (30). A pair of second channel guides 60a and 60b positioned therein and a wet channel pin 70 positioned between the pair of second channel guides 60a and 60b are provided.

The second flow guides 60a and 60b prevent the air passing through the wet channel WC from leaking to the outside of the heat exchanger, and the additional air flows from the left upper direction WCI of the wet channel fin 70. After passing through the wet channel pin 70 in the downward direction and flows to the right downward direction (WCO) of the wet channel pin 70 is discharged to the outside.

A wet channel pin according to the present invention will be described with reference to FIGS. 4 to 7.

The wet channel pins 70 of the present invention are provided with

unit pin units

71, 72, 73, 74, 75 having a cross-sectional shape having a ∩ or ∧ shape, and one

unit pin unit

71, 72, 73, 74. Other unit pin units 71-1, 72-2, 73-1, 74-1, 75-1 neighboring to 75 are adjacently connected in a direction perpendicular to the flow direction of air, as shown in FIG. 6. As shown, it consists of the shape of the waveform.

Since one

unit pin unit

71, 72, 73, 74, 75 and the neighboring unit pin unit 71-1, 72-2, 73-1, 74-1, 75-1 have the same configuration, The same description will be omitted below.

The

unit pin units

71, 72, 73, 74, and 75 form a flow path space through which air flows, and a pair of first pins facing each other such that evaporation occurs by contact with supplied evaporated water. Body 71 and the second pin body 72, the pin body connecting portion 73 for connecting the upper ends of the pair of pin body (71, 72), the first pin body 71 and the second pin body A plurality of slits 74 formed at a predetermined interval along the longitudinal direction in the 72, 72, the cut portion 75 formed in the shape cut to the end located at the end of the flow path of air in the second pin body (72). .

The first pin body 71 is formed in a predetermined length in the direction of flow of air (in the direction of the arrow in FIG. 4) to guide the flow of air, and the second pin body 72 is the first pin body 71. It is formed to face each other as the same shape as.

The first fin body 71 is formed with a plurality of slits 74a spaced apart in the longitudinal direction thereof, and the first fin body 71 is formed along the longitudinal direction due to the formation of the slits 74a. A plurality of

pin bodies

71a and 71b are separated.

The slit 74a is formed by cutting the first pin body 71 in the height direction, and one pin body 71a and the pin body 71b adjacent to each other with the slit 74a interposed therebetween in the longitudinal direction. It consists of the shape (deviated shape) which protruded in the opposite direction (left-right direction in FIGS. 4 and 6) as a perpendicular direction with respect to each other. That is, in FIG. 4, one pin body 71a is positioned at the right side with respect to the slit 74a, and the other pin body 71b is positioned at the left side with respect to the slit 74a. Therefore, the slit 74a has an open shape, and air flows through the open portion.

The cutout 75 is formed in the pin body 72a, which is an end portion located at the end of the flow path of air as the second pin body 72. The cutout 75 is formed in a round shape and cut in a semicircular shape.

The evaporated water injected into the wet channel fins 70 is spread along the surfaces of the first fin body 71 and the second fin body 72, and the evaporated water remaining without evaporation is the surface of the wet panel fin 70. Along the flow in the same direction as the air flow direction (downward in FIGS. 4 and 7).

The evaporated water flowing down is formed between the first pin body 71 and the

pin bodies

71a and 72a located at the bottom of the second pin body 72 at a position close to the pin body connection portion 73a.

In the case of the present invention, because the incision portion 75 is formed in the second pin body 72a, a portion corresponding to the first pin body 71a in the second pin body 72a close to the pin body connection portion 73a. Since this is cut out, condensation is prevented in the space between the

pin bodies

71a and 72a.

Therefore, the air can flow smoothly through the space between the first fin body 71 and the second fin body 72, thereby preventing a decrease in heat exchange performance.

In the present embodiment, the cutout 75 is illustrated as being formed in the second pin body 72, but may also be configured to be formed in the first pin body 71.

Referring to FIG. 7, air flowing from the upper side to the lower side flows through a space between the first pin body 71 and the second pin body 72. In this case, since one fin body 71a and the adjacent fin body 71b are shifted from each other and

slits

74a and 74b are formed therebetween, air flows in a zigzag form while passing through the

slits

74a and 74b. Done. This flow of air can improve heat exchange efficiency.

In the present embodiment, the cutout 75 is illustrated as being cut in a semicircle shape as a round shape, but may be modified in a polygonal shape such as a triangle or a square.

A wet channel pin according to another embodiment of the present invention will be described with reference to FIG. 8.

The wet channel pin 170 according to the present embodiment includes a pair of

pin bodies

171 and 172 facing each other, and a pin body connecting portion 173 connecting upper ends of the pair of

pin bodies

171 and 172 to each other. It includes a pin unit (171, 172, 173), the unit pin unit (171, 172, 173) is composed of a plurality of contiguous adjacent in the direction perpendicular to the flow direction of the air.

The pair of

pin bodies

171 and 172 form a flow path space through which air flows, and a pair of first pin bodies 171 and a second facing each other so that evaporation occurs by contact with supplied evaporated water. Consists of a pin body 172, the first pin body 171 and the second pin body 172 is formed with concave-convex (174a, 174b) to form a cross section of the waveform along the longitudinal direction, respectively.

Due to the shape of the concave-convex (174a, 174b) it is possible to increase the heat transfer area to improve the heat exchange performance.

In the second fin body 172, the cutout portion 175 of the cut shape is formed at the end located at the end of the flow path of air to prevent the formation of evaporated water that has not evaporated, This can improve the heat exchange performance by preventing the flow of air to be disturbed.

A wet channel pin according to another embodiment of the present invention will be described with reference to FIG. 9.

This embodiment has a different configuration compared to the embodiment shown in FIG. 8, and the plurality of

louvers

274a, 274b, 274c and 274d along the longitudinal direction of the

fin bodies

271 and 272 of the wet channel pin 270. There is a difference in that it is formed.

The

louvers

274a, 274b, 274c and 274d form

openings

274c and 274d by opening portions of the first pin body 271 and the second pin body 272, and the

louver bodies

274a and 274b. Is bent to be inclined with respect to the air flow direction.

In this case, the louver body 274a and the louver body 274-1a adjacent to the louver body 274a formed along the longitudinal direction of the first pin body 271 are inclined in a direction in which the inclination direction is symmetrical with respect to the air flow direction. In addition, the louver body 274b and the louver body 274-1b neighboring the louver body 274b formed along the longitudinal direction of the second fin body 272 are inclined in a direction in which the inclination direction thereof is symmetrical with respect to the air flow direction. In addition, the louver bodies 274a and the other louver bodies 274b facing each other are also inclined in a direction in which the inclined direction thereof is symmetrical with respect to the flow direction of air.

Due to this configuration, as shown in FIG. 9, the air flows through the

openings

274c and 274d to increase the heat transfer area, thereby improving heat exchange performance.

The second fin body 272 is formed at the end of the flow path of the air in the cut portion 275 of the cut shape is formed in the same shape as the first embodiment, to prevent the formation of evaporated water not evaporated, This can improve the heat exchange performance by preventing the flow of air to be disturbed.

Claims

In the heat exchanger of the dehumidification cooling evaporative cooler having at least one dry channel and at least one wet channel, the heat exchange between the dry channel and the wet channel,

The wet channel is provided with a wet channel fin (70) to form a flow path space through which air flows and to evaporate by contact with the supplied evaporated water;

The wet channel pins 70, 170, and 270 may include a pair of pin bodies 71, 72; 171, 172; 271 and 272 facing each other, and a pin connecting upper ends of the pair of pin bodies 71, 72, 171, 172, 271 and 272 to each other. Unit pin units (71, 72, 73; 171, 172, 173; 271, 272, 273) consisting of the body connection portion (73, 173, 273), but any one of the pair of pin bodies (71, 72; 171, 172; 271, 272) is in the pin body (72, 172, 272) Heat exchanger of the evaporative cooler for dehumidification cooling characterized in that the cut portion (75, 175, 275) of the cut shape is formed at the end located at the end of the flow path of the air
The method of claim 1,

The wet channel pins 70, 170, 270 are connected to a plurality of unit pin units 71, 72, 73; 171, 172, 173; 271, 272, 273 in a direction parallel to the longitudinal direction thereof, and thus, the unit pin units 71, 72, 73 are connected. ; 171,172,173; 271,272,273 The heat exchanger of the evaporative cooler for dehumidification cooling characterized in that the cross section perpendicular to the longitudinal direction is made of a wave shape.
The method according to claim 1 or 2,

The cutouts 75, 175, and 275 are heat exchangers of the evaporative cooler for dehumidification cooling, characterized in that the round or polygonal shape.
The method according to claim 1 or 2,

The heat exchanger of the evaporative cooler for dehumidification cooling characterized in that the concave-convex (174a, 175a) is formed in the fin bodies (171,172) of the wet channel fin (170) so as to have a corrugated cross section along the longitudinal direction.
The method according to claim 1 or 2,

A plurality of louvers 274a and 274b are formed in the fin bodies 271 and 272 of the wet channel fins 270 along the longitudinal direction, so that the air passes through the cutouts 274c and 274d of the louvers 274a and 274b. Heat exchanger of the evaporative cooler for dehumidification cooling characterized in that the flow
The method according to claim 1 or 2,

The fin bodies 71 and 72 of the wet channel are formed with a plurality of slits 74a and 74b at regular intervals along the longitudinal direction, and the fin bodies adjacent to each other with the slits 74a and 74b therebetween ( The heat exchanger of the evaporative cooler for dehumidification cooling characterized in that the air flows through the slits (74a, 74b) protruding in opposite directions as a direction perpendicular to the longitudinal direction, 71a, 71b;
The method of claim 1,

The wet channel,

A pair of partition walls 20 and 30 facing each other;

The wet channel pins (70) positioned between the pair of partition plates (20, 30) and located in the center portion;

Flow path guides (60a, 60b) positioned at the edges of the pair of partition plates (20, 30) to determine the flow direction of the air;

Heat exchanger of the evaporative cooler for dehumidification cooling, characterized in that consisting of