WO2023211141A1

WO2023211141A1 - Cooling system

Info

Publication number: WO2023211141A1
Application number: PCT/KR2023/005659
Authority: WO
Inventors: 이동근; 황인수
Original assignee: 주식회사 경동나비엔
Priority date: 2022-04-26
Filing date: 2023-04-26
Publication date: 2023-11-02

Abstract

The present invention provides a cooling system that sufficiently cools air without a freeze cycle by using latent heat from the vaporization of water and heat exchange. Provided in one embodiment is a cooling system comprising: a housing; first and second flow paths formed in the housing; a first heat exchanger disposed on the first flow path; a main water supplier disposed above the first heat exchanger to supply water thereto; a second heat exchanger disposed on the second flow path; and a gas-liquid contact part disposed on the second flow path so as to pass there-through the air that has passed through the second heat exchanger, wherein the first heat exchanger and the second heat exchanger are connected to each other such that a cooling fluid can circulate there-between, and a pump for circulating the cooling fluid is disposed between the first heat exchanger and the second heat exchanger.

Description

cooling system

The present invention relates to a natural cooling system that cools air by utilizing the latent heat of evaporation of water and heat exchange without a refrigeration cycle.

Figure 1 shows a cooling system used in a space that requires adequate cooling with low energy, for example, a poultry farm. As shown in Figure 1, the cooling system 1 includes a pump 20 connected to a water source WS and a gas-liquid contact part 10 connected to the pump. The gas-liquid contact part 10 provides water using a material such as cellulose and passes air through the material, thereby reducing the temperature of the passing gas and increasing the humidity as the water evaporates. This cooling system 1 can lower the temperature of the air by utilizing the latent heat of evaporation of water without a refrigerant, but the temperature range that can be lowered is limited, making it difficult to provide substantially cool air.

Meanwhile, evaporative cooling technology is known to lower the temperature of the air by using the double cooling effect of water and does not use refrigerants other than water.

This evaporative cooler is configured to alternately and repeatedly form wet channels and dry channels and cool the air passing through the dry channels by evaporation in the wet channels.

(Patent Document 1) KR 10-2020-0073720 A

The present invention is intended to solve problems in the prior art and aims to provide a cooling system that sufficiently cools the air by utilizing the latent heat of evaporation of water and heat exchange without a refrigeration cycle.

The present invention provides the following cooling system to solve the above objectives.

In one embodiment, the present invention includes a housing; first and second flow paths formed within the housing; a first heat exchanger disposed on the first flow path; a watering device disposed above the first heat exchanger and providing water to the first heat exchanger; a second heat exchanger disposed on the second flow path; and a gas-liquid contact portion disposed on the second flow path to allow air passing through the second heat exchanger to pass through, wherein the first heat exchanger and the second heat exchanger are connected to each other so that the cooling fluid circulates, and the first heat exchanger and the second heat exchanger are connected to each other so that the cooling fluid circulates. A cooling system is provided in which a pump for circulating cooling fluid is disposed between the second heat exchangers.

In one embodiment, the gas-liquid contact unit may include a water supply unit located at the top and a contact body connected to the water supply unit and configured to contact air as the water supplied from the water supply unit moves downward.

In one embodiment, a tank for collecting water that has passed through the gas-liquid contact portion and the first heat exchanger; and a pump that provides water stored in the tank to the water injection device and the gas-liquid contact portion, wherein the first and second flow paths are formed by a separation wall disposed inside the housing, and the second A through hole is formed in the lower part of the gas-liquid contact part in the dividing wall dividing the flow path, the tank is disposed in the lower part of the through hole, and an end of the gas-liquid contact part may be located in the through hole.

In one embodiment, the first heat exchanger may have a structure in which multiple layers formed of a first head and a second head arranged side by side and a plurality of tubes connecting the first head and the second head are stacked.

In one embodiment, a water storage unit is disposed below the contact body, and the water storage unit is connected to the water injection device, so that water stored in the water storage unit can be provided to the first heat exchanger through the water injection device.

In one embodiment, the water supply unit is connected to a water supply source, and a tank storing water that has passed through the first heat exchanger is disposed below the first heat exchanger, and the tank may include a drain unit.

In one embodiment, the second heat exchanger is a fin-tube heat exchanger, and the gas-liquid contact portion may be disposed at a higher position than the first heat exchanger.

In one embodiment, the present invention includes a housing; a plurality of flow paths formed within the housing; An evaporative cooler that includes a main body in which a plurality of dry channels and a plurality of wet channels are alternately arranged and a watering device that supplies water from the upper part of the main body to the wet channels, and cools the supplied air passing through the dry channels; and a gas-liquid contact portion disposed at the rear end of the dry channel of the evaporative cooler, wherein the flow path includes a first flow path passing through the wet channel and a second flow path sequentially passing through the dry channel and the gas-liquid contact portion. Provides a cooling system.

In one embodiment, the gas-liquid contact unit may be connected to a water supply unit at the top, so that water supplied from the water supply unit contacts air as it moves downward.

In one embodiment, it further includes a third flow path passing through the gas-liquid contact part, and the third flow path may be configured to pass through an upper part of the gas-liquid contact part than the second flow path.

In one embodiment, the housing includes a separation wall that separates the second flow path and the third flow path and includes a through groove through which the gas-liquid contact part passes, and the gas-liquid contact part extends in a vertical direction, and the through groove passes through the gas-liquid contact part. It can be placed through the groove.

In one embodiment, a first pump disposed between the water collection unit and the water injection device may be further included to supply water from the water collection unit provided below the gas-liquid contact unit to the water injection device.

In one embodiment, the first flow path is formed to pass through a first inlet, a wet channel of the evaporative cooler, and a first outlet, and the second flow path is formed through a second inlet, a dry channel of the evaporative cooler, and the gas-liquid. It may be formed to pass through the contact portion and the second outlet portion.

The present invention can provide a cooling system that sufficiently cools the air with a small energy source by utilizing the latent heat of evaporation of water and heat exchange.

1 is a schematic diagram of a conventional natural cooling system.

Figure 2 is a schematic diagram of a natural cooling system according to a first embodiment of the present invention.

Figure 3 is a schematic diagram showing temperature changes in the natural cooling system of Figure 2.

Figure 4 is a schematic diagram of a natural cooling system according to a second embodiment of the present invention.

Figure 5 is a schematic diagram of a natural cooling system according to a third embodiment of the present invention.

Figure 6 is a schematic diagram of a natural cooling system according to a fourth embodiment of the present invention.

* Explanation of symbols *

1: Natural cooling system 10: Gas-liquid contact part

11: water supply part 12: contact body

13: water storage part 21, 24: inlet part

22, 23, 25:

outlet

31, 32, 33: fan

50: housing 51, 52: separating wall

60: Evaporative cooler 61: Main body

62:

watering device

70, 70a, 70b: pump

80: first heat exchanger 81: water injection device

85: second heat exchanger WS: water source

Hereinafter, with reference to the attached drawings, preferred embodiments will be described in detail so that those skilled in the art can easily practice the present invention. However, when describing preferred embodiments of the present invention in detail, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the same symbols are used throughout the drawings for parts that perform similar functions and actions. In addition, in this specification, terms such as 'upper', 'top', 'upper surface', 'lower', 'lower', 'lower surface', 'side', etc. are based on the drawings and are actually elements or components. It may vary depending on the direction in which it is placed.

In addition, throughout the specification, when a part is said to be 'connected' to another part, this does not only mean 'directly connected', but also 'indirectly connected' with another element in between. Includes. In addition, 'including' a certain component means that other components may be further included rather than excluding other components, unless specifically stated to the contrary.

Figure 2 shows a schematic diagram of a natural cooling system according to a first embodiment of the present invention.

As shown in Figure 2, the natural cooling system 1 according to an embodiment of the present invention includes a housing 50, a plurality of flow paths F1, F2, and F3 formed within the housing 50; It includes a main body 61 in which a plurality of dry channels and a plurality of wet channels are alternately arranged, and a watering device 62 that supplies water from the upper part of the main body 61 to the wet channel. An evaporative cooler (60) that cools the air; and a gas-liquid contact portion 10 disposed at the rear end of the gun channel of the evaporative cooler 60.

Separation walls

51 and 52 are formed inside the housing 50 to separate air flows so that the flow paths F1, F2 and F3 do not mix, and the housing 50 has a plurality of

inlets

21 and 24 and A plurality of

outlets

22, 23, and 25 are formed.

A tank 63 is provided at the bottom of the wet channel of the evaporative cooler 60, and a water storage portion 13 is provided at the bottom of the gas-liquid contact portion 10. The tank 63 and the water storage unit 130 are connected to a pump 70, and the pump 70 transfers water collected from the tank 63 and the water storage unit 13 to the gas-liquid contact unit 10. It is circulated to the water supply unit 11 and the water injection device 61. A filter may be provided on the circulation path through which water circulates.

The flow paths (F1, F2, F3) sequentially pass through the first flow path (F1) passing through the wet channel of the evaporative cooler 60, the dry channel of the evaporative cooler 60, and the gas-liquid contact portion 10. It includes a second flow path (F2) and a third flow path (F3) configured to pass through an upper part of the contact body 12 of the gas-liquid contact portion 10 rather than the second flow path.

The gas-liquid contact part 10 includes a water supply part 11 located at the top, a contact body 12, and a water storage part 13 located at the bottom, and the contact body 12 allows water to flow along the surface. It may be a structure made of plastic and/or paper, for example, Celdek from Munters. The gas-liquid contact unit 10 is configured to cool the passing air by vaporizing it when the water supplied to the water supply unit 11 flows down the contact main body 12.

The water supply unit 11 sprays or flows the supplied water to the contact body 12, and the air flow passes through the contact body 12, and the water flows through the surface of the contact body 12. Heat exchange between air and water takes place. The water that flows down the contact body (12) due to its own weight is collected into the water storage unit (13), and the water collected in the water storage unit (13) is supplied back to the water supply unit (11) by the pump (70). do. Since evaporation occurs in the gas-liquid contact part 10, water supply is necessary, and water supply may be provided from the water storage part 13, but in this embodiment, the water supply source is provided in the tank 60 below the evaporative cooler 60. (WS) is connected to supply water to the natural cooling system (1).

In this embodiment, two air flows pass through the gas-liquid contact portion 10: a third flow path (F3) passes through the upper part, and a second flow path (F2) passes through the lower part. As the third flow path (F3) passes through the gas-liquid contact part 10, the water in the gas-liquid contact part 10 evaporates, and the air passing through the third flow path (F3) is cooled by the latent heat of evaporation, and at the same time, the gas-liquid contact part 10 The water passing through that region in (10) is also cooled.

The second flow path (F2) causes evaporation again as it comes into contact with the water that has been primarily cooled by the third flow path (F3), and the air passing through the second flow path (F2) is cooled by the latent heat of evaporation. At this time, because water of a lower temperature is supplied to the second flow path (F2) than to the third flow path (F3), the air passing through the second flow path (F2) may have a lower temperature.

Meanwhile, the second flow path (F2) undergoes primary cooling while passing through the dry channel of the evaporative cooler (60) before passing through the gas-liquid contact portion (10). Since the configuration of the evaporative cooler 60 is known in Patent Document 1 of the background technology, description of the configuration itself will be omitted. The evaporative cooler 60 has a main body 61 in which dry channels and wet channels are alternately formed. and a watering device 62 that sprays or supplies water from the upper part of the main body 61 to the wet channel.

In the evaporative cooler 60, the first flow path (F1) passes through the wet channel, and therefore, the water supplied to the wet channel through the water pouring device 62 is caused by the air passing through the first flow path (F1). As evaporation occurs, the temperature drops, and the air in the second flow path (F2) passing through the gun channel can be cooled. Since the dry channel and wet channel are separated in the evaporative cooler 60, the temperature of the air passing through the dry channel decreases without increasing humidity.

The first flow path (F1) receives outside air (OA) through the inlet 21, passes through the water injection device 62 of the evaporative cooler 60 and the wet channel of the main body 61, and flows through the outlet 22. It is exhausted (EA). The air flow in the first flow path (F1) is formed by the fan 31 disposed at the outlet 22, but the position of the fan 31 is not limited to the outlet 22, and the first flow path F1 It may be formed anywhere on the image.

In the second flow path (F2), outside air (OA) enters through an inlet (24) different from the inlet (21), passes through the dry channel of the evaporative cooler (60), passes through the gas-liquid contact portion (10), and then enters the indoor air. Or, the air is supplied (SA) to the desired space. The air flow in the second flow path (F2) is formed by the fan 33 disposed at the outlet 25 for supply air (SA), but the position of the fan 33 is not limited to the outlet 25 and the second It may be formed anywhere on the flow path (F2). For example, the fan 33 may be located between the dry channel of the evaporative cooler 60 and the gas-liquid contact portion 10.

Outside air (OA) enters the third flow path (F3) through the same inlet (21) as the first flow path (F1), passes through the gas-liquid contact portion (10), and is then exhausted (EA) through the outlet (23). . The air flow of the third flow path (F3) is formed by the fan 32 disposed at the outlet 23, but the position of the fan 32 is the same as that of the first and second flow paths F1 and F2. (F3) It may be formed at any position on the image.

In the first embodiment, the first flow path (F1) and the third flow path (F3) are introduced into the housing 50 through the same inlet 21 and then branched by the separation wall 51. The separation wall 51 includes a through groove 51a, and the gas-liquid contact portion 10 passes through the through groove 51a. The gas-liquid contact portion 10 can be positioned across the third flow path F3 and the second flow path F2 by passing through the through groove 51a of the separation wall 51, and the third flow path ( Due to the air in F3), the temperature of the water flowing through the gas-liquid contact portion 10 can meet the air in the second flow path (F2) in a lowered state, so that the temperature of the air passing through the second flow path (F2) can be sufficiently lowered. there is.

FIG. 3 is a diagram illustrating the temperature at each point of the second flow path F2 in the embodiment of FIG. 2 on a psychrometric diagram.

Considering that the outdoor air (A) temperature on a summer day in Korea is approximately 35℃, humidity 40%, and wet bulb temperature 24℃, when only the gas-liquid contact part 10 passes, the temperature changes along the wet bulb temperature, so the temperature can be lowered. is limited.

However, in this embodiment, the outside air (A) is primarily cooled by the evaporative cooler 60 without changing the amount of moisture contained in the air, so the temperature is lowered while the absolute humidity is maintained, and the temperature moves to point B. It will happen. In the case of point B, for example, the temperature is 27℃, humidity is 63.5%, and wet bulb temperature is about 21.8℃. The air after passing through the evaporative cooler 60 passes through the gas-liquid contact part 10, and the temperature can be lowered once more while the wet bulb temperature is maintained. At point C, the temperature is approximately 23.5°C, humidity 85%, and wet bulb temperature. It is about 21.7℃, and through the natural cooling system (1), air can be provided at a sufficiently low temperature, approximately 23℃. This level of temperature provides a practical cooling effect, allowing the barn to be run without significant power consumption even on hot summer days. In addition, it is possible to provide cold air to the home or various spaces.

In particular, tap water is maintained at about 25°C even on a normal summer day, but in this embodiment, the temperature of the tap water is lowered through the air in the third flow path (F3) and the gas-liquid contact portion 10 flows through the second flow path (F2). Because of the contact, in addition to the temperature drop due to evaporation of water, there is also a temperature drop due to heat exchange with tap water at a lower temperature, so it is possible to achieve a temperature lower than the above approximate temperature.

Therefore, this embodiment can provide cold air without running a refrigeration cycle when cooling to a low temperature is not required, thereby improving energy efficiency, and the temperature of the exhausted air does not increase, so there is no heat emission. There is also.

Figure 4 shows a schematic diagram of a second embodiment of the present invention.

As shown in Figure 4, the natural cooling system 1 according to the second embodiment of the present invention includes a housing 50, a plurality of flow paths F1 and F2 formed within the housing 50; It includes a main body 61 in which a plurality of dry channels and a plurality of wet channels are alternately arranged, and a watering device 62 that supplies water from the upper part of the main body 61 to the wet channel. An evaporative cooler (60) that cools the air; and a gas-liquid contact portion 10 disposed at the rear end of the gun channel of the evaporative cooler 60.

Separation walls

51 and 52 are formed inside the housing 50 to separate air flows so that the flow paths F1 and F2 do not mix, and the housing 50 has a plurality of

inlets

21 and 24 and a plurality of

inlets

21 and 24.

Outlets

22 and 25 are formed.

The gas-liquid contact part 10 includes a water supply part 11 located at the top, a contact body 12, and a water storage part 13 located at the bottom, and the contact body 12 allows water to flow along the surface. It may be a structure made of plastic and/or paper. The water supply part 11 of the gas-liquid contact part 10 is connected to the water source WS, and when water from the water source WS flows down along the contact main body 12 through the water supply part 11, the contact main body 12 The air passing through (12) evaporates and cools the passing air.

The water supply unit 11 sprays or flows the supplied water to the contact body 12, and the air flow passes through the contact body 12, and the water flows through the surface of the contact body 12. Heat exchange between air and water takes place. The water that flows down the contact body (12) due to its own weight is collected into the water storage unit (13).

A pump 70 is connected to the water storage unit 13, and the water collected in the water storage unit 13 is supplied to the water injection device 61 of the evaporative cooler 60 through the pump 70.

The evaporative cooler 60 is the same as the evaporative cooler 60 of the first embodiment and includes a water injection device 61 and a main body 62. The main body 62 includes dry channels and wet channels arranged alternately, and as the water sprayed or supplied from the watering device 61 meets the air passing through the wet channels, the temperature is lowered, and the air and dry channels in the lowered wet channels are combined. As the air in the channel exchanges heat, the temperature of the air in the gun channel can be lowered without changing the absolute humidity.

A tank 63 is provided at the bottom of the wet channel of the evaporative cooler 60, and water collected in the tank 63 can be drained. In the second embodiment, water is not circulated, and the water supplied to the gas-liquid contact part 10 exchanges heat with air and evaporates, and then is supplied to the water injection device 61 of the evaporative cooler 60 by the pump 70, After passing through the evaporative cooler 60, it is drained from the tank 63.

In the second embodiment, water is not circulated, so there is no concern about bacterial growth or foreign matter contamination, and new water is supplied to each component, that is, the evaporative cooler 60 and the gas-liquid contact part 10, providing an advantage in terms of hygiene. It can be used for cooling by utilizing the temperature of tap water.

The flow paths (F1, F2) include a first flow path (F1) passing through the wet channel of the evaporative cooler 60, and a second flow path sequentially passing through the dry channel of the evaporative cooler 60 and the gas-liquid contact portion 10. Includes Euro (F2).

In the evaporative cooler 60, the first flow path (F1) passes through the wet channel, and therefore, the water supplied to the wet channel through the water pouring device 62 is caused by the air passing through the first flow path (F1). As evaporation occurs, the temperature drops. Accordingly, as the temperature of the wet channel decreases, the air in the second flow path F2 passing through the dry channel that exchanges heat with the wet channel may be cooled. Since the dry channel and wet channel are separated in the evaporative cooler 60, the temperature of the air passing through the dry channel decreases without increasing humidity.

In the second flow path (F2), outside air (OA) enters through an inlet (24) different from the inlet (21), passes through the dry channel of the evaporative cooler (60), passes through the gas-liquid contact portion (10), and then enters the indoor air. Or, the air is supplied (SA) to the desired space. The air flow in the second flow path (F2) is formed by the fan 33 disposed at the air supply outlet 25, but the position of the fan 33 is not limited to the outlet 25 and the second flow path F2 ) may be formed at any position on the surface.

In the second embodiment, water whose temperature has been lowered due to the latent heat of evaporation from the gas-liquid contact portion 10 is supplied to the water injection device 61 of the evaporative cooler 60, and accordingly, not only the latent heat of evaporation is generated in the wet channel of the evaporative cooler 60. In addition, due to water-air heat exchange, the temperature of the wet channel can be lowered compared to the first embodiment, and thus the temperature of the air passing through the dry channel can be provided even lower than that of the first embodiment. Accordingly, the temperature difference between points A and B on the second flow path F2 may become larger.

In addition, the temperature of the air that has passed through the evaporative cooler 60 in the second flow path (F2) may drop again as it passes through the gas-liquid contact portion 10, and accordingly, the air supplied (SA) through the outlet 25 can be provided at a sufficiently low temperature.

In the case of the second embodiment, water is not recycled, so water consumption may slightly increase, but by recycling the water lowered in the gas-liquid contact part 10 in the evaporative cooler 60, not only is water consumption less than when operating separately. , it can provide a low supply air temperature, and in terms of management, it is easy to manage because the risk of breeding bacteria, etc. is lowered by discharging water rather than storing it.

In the case of the second embodiment, compared to the first embodiment, the temperature difference between point A and point B is larger than that of the first embodiment, and the temperature difference between point B and point C is smaller than that of the first embodiment. , overall, it can provide the same level of cooling.

Therefore, like the first embodiment, the natural cooling system of the second embodiment can also provide cold air without running a refrigeration cycle when cooling to a low temperature is not required, thereby improving energy efficiency and reducing exhaust air. There is also the advantage that there is no heat emission as the temperature does not rise.

Figure 5 shows a third embodiment of the present invention.

As shown in Figure 5, the natural cooling system 1 according to an embodiment of the present invention includes a housing 50, a plurality of flow paths F1 and F2 formed within the housing 50; First and second heat exchangers (80, 85) disposed in the plurality of flow paths (F1, F2) and a pump (70a) for circulating refrigerant to the first and second heat exchangers (80, 85); A water injection module (81) providing water to the first heat exchanger (80); It includes a gas-liquid contact portion 10 disposed at the rear end of the second heat exchanger 85.

Separation walls

51 and 52 are formed inside the housing 50 to separate air flows so that the flow paths F1 and F2 do not meet, and the housing 50 has a plurality of

inlets

21 and 24 and a plurality of outlets. (22, 25) is formed.

The gas-liquid contact part 10 includes a water supply part 11 and a contact body 12 located at the top, and the contact body 12 may be a structure made of plastic and/or paper that allows water to flow along the surface. . The water that has passed through the contact body 12 flows down into the tank 83 through the through hole 52a of the separation wall 52 and is collected.

The water supply part 11 of the gas-liquid contact part 10 is connected to the pump 70b, and the pump 70b supplies water from the tank 83 under the housing 50 to the gas-liquid contact part 10. When water flows down along the contact body 12 through the water supply unit 11, it is vaporized by the air passing through the contact body 12 and cools the passing air.

In the third embodiment, the first heat exchanger 80, the second heat exchanger 85, and a pump 70a for moving the cooling fluid circulating between the first heat exchanger 80 and the second heat exchanger 85 Includes. In the case of the first heat exchanger 80, a water injection device 81 is disposed at the top, and the cooling fluid passing through the first heat exchanger 80 is brought into contact with water sprayed/supplied from the water injection device 81 to change the temperature. may be lowered.

The first heat exchanger 80 cools by utilizing the latent heat of evaporation from the evaporation of water provided from the water pouring device 81, making it possible to cool the water to a temperature lower than the temperature of the water supplied from the water pouring device 81. The water sprayed from the water injection device 81 to the first heat exchanger 80 evaporates and cools the cooling fluid of the first heat exchanger 80, but in the case of the remaining water, it is stored in a tank located below the first heat exchanger 80. Collected in (83).

The first heat exchanger 80 has a multi-layer structure in which a pair of heads (80a, 80c) disposed on both sides and a plurality of tubes (80b) connect the heads (80a, 80c) between the pair of heads (80a, 80c). It is formed by stacking, and fins are connected between the tubes 80b to increase the contact area.

The stacked heads (80a) are connected to each other, and the cooling fluid supplied to one head (80a) of the uppermost layer goes to the other head (80c) through the tube (80b), then goes down to the other head (80c) of the lower layer, and then through the tube again. In the first heat exchanger (80), the cooling fluid passes through the multi-layer and changes direction to exchange heat with the air and water passing through the head (80a) of the lower layer through (80b). It is not limited to this, and other structures can be applied as long as they can sufficiently contact the air in the first flow path F1 and the water sprayed from the water injection device 81.

The water collected in the tank 83 can be supplied back to the water injection device 81 by the pump 70b, and a filter (not shown) is placed in the tank 83 connected to the pump 70b. It can remove foreign substances from circulating water. The tank 83 is sprayed from the water injection device 81 and collects water that has not been evaporated in the first heat exchanger 80 and water that has not been evaporated as it passes through the gas-liquid contact part 10. Even in the case of the water that has not been evaporated, it is evaporated. Since the temperature is lowered by the latent heat of evaporation of the water, the temperature of the water in the tank 83 can be maintained lower than the temperature of the water supplied from the water source WS.

Meanwhile, the tank 83 is connected to the water supply source (WS) and can continuously replenish the amount of water reduced by evaporation.

The second heat exchanger 85 is a heat exchanger that performs heat exchange between air and cooling fluid and may be, for example, a fin-tube heat exchanger.

The temperature of the cooling fluid that has passed through the first heat exchanger (80) is lowered by the water provided from the water injection device (81), and is supplied to the second heat exchanger (85) through the pump (70a). The second heat exchanger (85) absorbs heat from the air while exchanging heat with low-temperature water and relatively high-temperature outside air, that is, the temperature of the air passing through the second flow path (F2) changes the amount of moisture contained in the air. It will be lowered without it.

The cooling fluid circulating through the first and

second heat exchangers

80 and 85 may be water, but is not limited to water, and of course it is also possible to use other cooling fluids. The circulation structure consisting of the first and

second heat exchangers

80 and 85 and the pump 70a does not utilize the phase change of the cooling fluid, and the pump 70a is for circulation of the cooling fluid.

The first flow path (F1) receives outside air (OA) through the inlet 21, passes through the first heat exchanger 80, and is exhausted (EA) through the outlet 22. The air flow in the first flow path (F1) is formed by the fan 31 disposed at the outlet 22, but the position of the fan 31 is not limited to the outlet 22, and the first flow path F1 It may be formed anywhere on the image.

In the second flow path (F2), outside air (OA) enters through an inlet (24) different from the inlet (21), passes through the second heat exchanger (85), passes through the gas-liquid contact portion (10), and then enters the room or Air is supplied (SA) to the desired space. The air flow in the second flow path (F2) is formed by the fan 33 disposed at the outlet 25 for supply air (SA), but the position of the fan 33 is not limited to the outlet 25 and the second It may be formed anywhere on the flow path (F2).

In the third embodiment, similar to the first and second embodiments, the temperature of the air supplied from the outside along the second flow path F2 is primarily lowered without a change in absolute humidity, and the wet bulb temperature is maintained thereafter. The temperature drops once more. Therefore, even in the case of the natural cooling system 1 of the third embodiment, sufficiently low air, for example, about 23°C, can be provided as supply air (SA) with low energy consumption.

Therefore, it is possible to apply the natural cooling system 1 of the third embodiment in cases where a low temperature is not required but a large amount of air is required.

Figure 6 shows a schematic diagram of a natural cooling system 1 of a fourth embodiment of the present invention.

In the case of the fourth embodiment, the first heat exchanger 80, the second heat exchanger 85, and the pump 70a are the same as those of the third embodiment, and the first and second flow paths F1 and F2 pass through Since the configuration and configuration of the

inlets

21 and 24 and the

outlets

22 and 25 of the housing 50 are the same, the description will focus on the different configurations.

In the fourth embodiment, the gas-liquid contact part 10 includes a water supply part 11 located at the top, a contact body 12, and a water storage part 13 located at the bottom, and the gas-liquid contact part 10 includes a water supply part ( When the water supplied to 11) flows down the contact body 12, it is vaporized by the air passing through the contact body 12 and cools the passing air.

The water supply unit 11 is connected to the water supply source WS, and the water storage unit 13 is connected to the pump 70b. The pump 70b supplies water from the water storage unit 13 to the water injection device 81.

The water injection device 81 receives water from the water storage unit 13 and sprays it into the first heat exchanger 80. Since the water supplied to the water injection device 81 is water that has passed through the contact body 12 and may have a lower temperature than the water source WS, the fourth embodiment is the water supplied to the water injection device 81 in the first heat exchanger 80 under the same conditions. The cooling fluid can be cooled to a lower temperature than in Example 3.

Among the water sprayed from the water injection device 83 to the first heat exchanger 80, water that has not evaporated in the first heat exchanger 80 is collected in the tank 83, and the collected water is drained.

In the case of the fourth embodiment, since water is not circulated, the configuration required for water circulation is unnecessary and management is easy. In particular, there is no concern about contamination by bacteria or foreign substances that may be generated from stored water, and the capacity of the pump 70b can be smaller than that of the third embodiment, so the energy input to the pump 70b can be saved. However, the amount of water used may be increased compared to the third embodiment.

The above description has focused on embodiments of the present invention, but the present invention is not limited thereto and can of course be implemented in various modifications.

Claims

housing;

first and second flow paths formed within the housing;

a first heat exchanger disposed on the first flow path;

a watering device disposed above the first heat exchanger and providing water to the first heat exchanger;

a second heat exchanger disposed on the second flow path; and

It includes a gas-liquid contact portion disposed on the second flow path through which air passing through the second heat exchanger passes,

The first heat exchanger and the second heat exchanger are connected to each other so that cooling fluid circulates, and a pump for circulating cooling fluid is disposed between the first heat exchanger and the second heat exchanger.
According to claim 1,

The air-liquid contact part includes a water supply part located at the top and a contact body connected to the water supply part and configured to contact air as the water supplied from the water supply part moves downward.
According to claim 1,

a tank that collects water that has passed through the gas-liquid contact portion and the first heat exchanger; and

A pump that supplies water stored in the tank to the water injection device and the gas-liquid contact portion.
According to claim 3,

The first and second flow paths are formed by a separation wall disposed inside the housing,

A cooling system in which a through hole is formed in a lower part of the gas-liquid contact part in the dividing wall dividing the second flow path, the tank is disposed in the lower part of the through hole, and an end of the gas-liquid contact part is located in the through hole.
According to claim 1,

The first heat exchanger is a cooling system having a structure in which a plurality of layers are stacked, including a first head and a second head arranged side by side and a plurality of tubes connecting the first head and the second head.
According to claim 2,

A water storage portion is disposed at the bottom of the contact body,

The water storage unit is connected to the water injection device, and the water stored in the water storage unit is provided to the first heat exchanger through the water injection device.
According to claim 6,

The water supply unit is connected to a water supply source,

A cooling system in which a tank storing water that has passed through the first heat exchanger is disposed below the first heat exchanger, and the tank includes a drain portion.
According to claim 6,

The second heat exchanger is a fin-tube heat exchanger,

A cooling system in which the gas-liquid contact portion is disposed at a higher position than the first heat exchanger.
housing;

a plurality of flow paths formed within the housing;

An evaporative cooler that includes a main body in which a plurality of dry channels and a plurality of wet channels are alternately arranged and a watering device that supplies water from the upper part of the main body to the wet channels, and cools the supplied air passing through the dry channels; and

It includes a gas-liquid contact portion disposed at the rear end of the gun channel of the evaporative cooler,

The flow path is a cooling system including a first flow path passing through the wet channel and a second flow path sequentially passing through the dry channel and the gas-liquid contact portion.
According to clause 9,

The air-liquid contact part is connected to a water supply part at the top, and the water supplied from the water supply part comes down and comes into contact with air.
According to claim 10,

It further includes a third flow path passing through the gas-liquid contact portion,

The third flow path is a cooling system configured to pass through an upper part of the gas-liquid contact part than the second flow path.
According to claim 11,

A cooling system configured to allow external air to flow into the first to third passages.
According to claim 12,

The housing includes a separation wall that separates the second flow path and the third flow path and includes a through groove through which the gas-liquid contact part passes,

A cooling system wherein the gas-liquid contact portion extends in a vertical direction and is disposed through the through groove.
According to claim 11,

A tank provided below the wet channel; and

A cooling system further comprising a pump between the tank, the water injection device, and the gas-liquid contact portion to supply water from the tank to the water injection device and the gas-liquid contact portion.
According to claim 10,

The cooling system further includes a first pump disposed between the water collection unit and the water injection device to supply water from the water collection unit provided below the gas-liquid contact portion to the water injection device.
According to claim 15,

A tank provided below the wet channel; and

A cooling system further comprising a second pump between the tank and the gas-liquid contact portion to supply water from the tank to the water injection device and the gas-liquid contact portion.
According to claim 16,

A cooling system configured to allow outside air to flow into the first and second flow paths.
According to claim 17,

The first flow path is formed to pass through a first inlet, a wet channel of the evaporative cooler, and a first outlet,

The second flow path is formed to pass through a second inlet, a dry channel of the evaporative cooler, the gas-liquid contact part, and a second outlet.