JP2003148894A - Heat exchanging coil, air conditioner and air-conditioning method using air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform humidification in addition to positive elimination of chemical substances. SOLUTION: This heat exchanging coil is provided with a hydrophilic water retentive layer provided on the surface of fins 22 of a coil body 21 of a cooling coil 5, and a water supply means 24 for supplying water to the hydrophilic water retentive layer. The water supply means 24 consists of a circulating system 25 in which water supplied to the upper part of the hydrophilic water retentive layer passes through the hydrophilic water retentive layer and reaches the lower part of the hydrophilic water retentive layer, and the water recovered there is supplied again to the upper part of the hydrophilic water retentive layer; and a supply system 26 for supplying water anew to the upper part of the hydrophilic water retentive layer. The supply system 26 is arranged downstream of the flow of air flowing into the heat exchanging coil, and the circulating system is arranged upstream of the flow of air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange coil capable of humidifying and simultaneously removing chemical substances, an air conditioner incorporating the heat exchange coil, and an air conditioning method using the air conditioner. Regarding

[0002]

2. Description of the Related Art Generally, fins made of aluminum are used for a heat exchange coil of an air conditioner. However, an air conditioner used in a factory that manufactures highly integrated semiconductors and liquid crystals does not use aluminum fins as they are, but uses those whose surface is coated with acrylic resin or the like. This is to prevent the aluminum component from entering the clean room in the factory and becoming a pollution source.

[0003]

As described above, in a factory for manufacturing semiconductors, liquid crystals, etc., not only is it possible to prevent aluminum components from entering the clean room, but there is a risk of an air pollution source from the outside air taken into the factory. The advent of an air conditioner capable of positively removing chemical substances such as hydrochloric acid ions, nitrite ions, nitrate ions, and ammonia ions is desired.

On the other hand, in the air conditioners used conventionally,
As a humidifier, a steam humidifier, water spray, etc. are built in, but such a humidifier has energy loss in the case of the steam humidifier, and the humidification efficiency is poor and the amount of water used is large in the case of the water spray method. , And both humidifiers,
Since it occupies a considerable space in the air conditioner, there is a problem that the air conditioner itself becomes large.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat exchange coil and a heat exchange coil capable of efficiently humidifying in addition to positively removing a chemical substance. An object of the present invention is to provide an air conditioner incorporating a heat exchange coil and an air conditioning method using the air conditioner. Another object of the present invention is to provide an air conditioner that can be downsized as compared with the conventional one.

[0006]

In order to solve the above-mentioned problems, in the invention according to claim 1, a hydrophilic / water-retaining layer provided on the surface of the fin of the heat exchange coil body, and the hydrophilic / water-retaining layer. And a water supply means for supplying water to the water.

In the invention according to claim 2, in the heat exchange coil according to claim 1, in the water supply means, the water supplied to the upper portion of the hydrophilic / water-retaining layer passes through the hydrophilic / water-retaining layer to obtain the hydrophilic property.・ Water that has reached the bottom of the water retention layer and is hydrophilic, and the circulation system that supplies water to the top of the water retention layer
It is characterized by a replenishment system that replenishes water to the upper part of the water retention layer.

According to a third aspect of the invention, in the heat exchange coil according to the second aspect, the replenishment system is downstream of the air flow flowing into the heat exchange coil and the circulation system is upstream of the air flow. The feature is that they are arranged on each side.

According to a fourth aspect of the present invention, in the heat exchange coil according to the first or second aspect, the water supply means supplies water by a coil surface on a downstream side of a flow of air flowing into the heat exchange coil. It is characterized by having a mechanism for collecting water on the upstream side of the air flow.

According to a fifth aspect of the present invention, in the heat exchange coil according to the first or second aspect, the water supply means is provided with the hydrophilic / hydrophilic member via a water supply pad arranged so as to be in contact with the heat exchange coil body. It is characterized by supplying water to the water retention layer.

According to a sixth aspect of the present invention, in the heat exchange coil according to the first or second aspect, the water supply means is provided with the hydrophilicity via a water collecting pad arranged so as to be in contact with the heat exchange coil body. -Characterized by collecting water from the water retention layer.

The invention according to claim 7 is characterized in that the heat exchange coil according to any one of claims 1 to 5 is provided as a cooling coil and a heating coil, respectively.

According to an eighth aspect of the invention, there is provided an air conditioning method using the air conditioner according to the sixth aspect, wherein water is supplied from the water supply means to the hydrophilic / water-retaining layer on the surface of the heating coil which is not in operation in summer. It is characterized by supplying water from the water supply means to the hydrophilic / water-retaining layer on the surface of the cooling coil which is not in operation in winter.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are schematic cross-sectional views of an air conditioner (hereinafter referred to as an external air conditioner) for treating the outside air according to the present invention. As shown in this figure, the external air conditioner 1 shown here
Has an outside air intake 2a and an outlet 2b, and has an outlet 2
In the casing 2 in which the duct 2c is connected to b, the pre-filter 3, the medium-performance filter 4, the cooling coil 5, the heating coil 6, the reheating coil 7, the fan 8 and the A performance filter 9 is provided.

The pre-filter 3 is, for example, wound in a roll shape, and a new filter surface is automatically fed into the air flow passage in accordance with the frequency of use. It captures relatively large debris from the incoming air. The medium performance filter 4 captures relatively small dust that cannot be removed by the pre-filter 3. The cooling coil 5 and the heating coil 6 will be described later in detail. Reheating coil 7
In order to mainly control the temperature and humidity, the air further heats the air that has passed through the cooling coil 5 and the heating coil 6 in the preceding stage.

A dew point thermometer 11 and a dry bulb thermometer 12 are interposed between the reheating coil 7 and the fan 8. Both thermometers 11 and 12 are electrically connected to a controller (not shown) that controls the flow rate of the heat medium supplied to the cooling coil 5, the heating coil 6, and the reheating coil 7, respectively.

The high-performance filter 9 captures smaller dust that cannot be removed by the medium-performance filter 4. As a result, it is possible to obtain extremely clean air that can be supplied to a clean room (not shown) in the external air conditioner.

The cooling coil 5 will be described. Since the heating coil 6 has the same basic configuration as the cooling coil, the description thereof will be omitted and the same components will be denoted by the same reference numerals. In the embodiment shown in FIGS. 3 and 4, water moves almost vertically in the hydrophilic / water-retaining layer 23 provided on the surfaces of the fins 22 of the cooling coil 5, and the water and air are absorbed on the surfaces of the fins 22. This is an example of a so-called vertical / cross flow method in which the two come into contact with each other at right angles.

The cooling coil 5 is welded or fixed to the coil main body 21 for flowing the heat medium and a large number of coils constituting the coil main body 21 so as to increase the substantial surface area of the coil and arranged in parallel with each other. And fins 22. A hydrophilic / water-retaining layer 23 is provided on both front and back surfaces of the fin 22, and a water supply means 24 for supplying water to the hydrophilic / water-retaining layer 23 is provided.

The hydrophilic / water-retaining layer 23 is formed by coating, for example, an aluminum fin 22 with an acrylic resin, and further acryl fiber threads or a thin cloth (in FIG. 2, cloth 23 in FIG. 2).
(in the example of a) is formed by being bonded or welded. The layer in which the fins 22 made of aluminum are simply coated with the acrylic resin is hydrophobic and cannot be a hydrophilic / water-retaining layer.

Further, what is adhered or welded on the acrylic resin coating layer is not limited to acrylic fiber thread or cloth, but may be thread or cloth made of other materials. The point is that the fibers or fibers have hydrophilic and water-retaining properties, and the water added to the surface of the fins 22 is sucked to wet not only the fiber body but also the fibers, so that the entire surface is uniform. Anything can be used as long as it makes a wet surface.

Also, in recent years, the fins 22 made of aluminum have been used.
Although a resin coated with an epoxy resin has been used in recent years, this layer alone can only provide hydrophilicity and not water-retaining properties. In such a hydrophilic epoxy resin layer, it is difficult to wet the entire fin surface with a small amount of water. In order to make the entire fin surface wet with a small amount of water, water retention is required in addition to hydrophilicity. In order to obtain water retention, a thread or cloth of epoxy resin fiber or acrylic fiber is further adhered or welded on the epoxy resin coating layer, and a fiber having water absorption is formed on the epoxy resin coating layer. Alternatively, it is effective to coat a resin mixed with an inorganic substance or the like.

When a cloth 23a made of acrylic fiber, epoxy resin fiber or the like is further adhered on the coating layer on the fins 22 made of aluminum, the total pressure loss of the air passing through the coil body 22 is reduced. In order to keep it low and to arrange the fins with high density,
It is preferable to use a cloth having a thinnest possible thickness.

Alternatively, in the water supply means 24, the water supplied to the upper part of the hydrophilic / water-retaining layer 23 passes through the hydrophilic / water-retaining layer 23 to reach the lower part of the hydrophilic / water-retaining layer 23, and is collected there. It comprises a circulation system 25 for supplying water to the upper part of the hydrophilic / water-retaining layer 23 again, and a replenishment system 26 for newly supplying water to the upper part of the hydrophilic / water-retaining layer.

The circulation system 25, as shown in FIGS.
A water supply pipe 25a that is arranged above the coil body 21 and has a large number of small holes on the lower surface, and is interposed between the water supply pipe 25a and the coil body 21 so as to be in contact with the coil body 21, for example, a sponge or the like. Water supply pad 27 made of porous material
And a water tank 25b arranged below the coil body 21,
It comprises a return pipe 25d with a circulation pump 25c for returning the water received in the water tank 25b to the water supply pipe 25a again. Further, the water tank 25b is provided with a drain pipe 25e for discharging overflow water.

The replenishment system 26 is provided on the upper part of the coil body 21 and has a water supply pipe 26a having a large number of small holes on its lower surface.
The water supply pipe 26a and the coil body 21 are interposed between the water supply pad 27 and the water supply pipe 26a (not shown) connected to the water supply pipe 26a.

In this embodiment, the water supply pad 2
7 uses a continuous common one for the circulation system 25 and the replenishment system 26, but is not limited to this, and the circulation system 25 and the replenishment system 26 may use separate and independent water supply pads. Good.

The circulation system 25 and the replenishment system 26 are provided downstream of the flow of the air flowing into the cooling coil 5.
However, the circulation systems 25 are arranged upstream of the air flow.

Next, the operation of the external conditioner having the above structure will be described. When the outside air taken in from the outside air intake port 2a passes through the pre-filter 3 and the medium-performance filter 4 in sequence, dust such as dust is removed, and then reaches the cooling coil 5. In the summer, a heat medium cooled to a predetermined temperature is passed through the cooling coil 5, and heat is exchanged between this heat medium and the outside air via the fins 22 of the cooling coil 5. The outside air is cooled to a preset set dew point, and the dew point of the cooled outside air at this time is detected by the dew point thermometer 11 arranged on the downstream side of the reheating coil 7, and the cooling coil 5 is cooled according to the detected value. The flow rate of the heat medium supplied to the control unit is controlled via a control device (not shown).

Thus, the outside air after passing through the cooling coil 5 next passes through the heating coil 6, but the heating medium is not supplied to the heating coil 6 and the outside air when passing through the heating coil 6 is reached. There is almost no change in temperature and humidity here.

However, to the heating coil 6, water supply means 24
Water is supplied through the heating coil 6, and the hydrophilic / water-retaining layer 23 on the fin surface of the heating coil 6 is a wet surface over the entire surface. That is, the water supplied from the water supply pipes 25a and 26a of the water supply means 24 reaches the water supply pad 27, is made uniform there, and reaches the coil body 21 below. The water supplied to the coil body 21 gradually falls through the hydrophilic / water retentive layer 23 on the surface of the fin 22 due to gravity. At this time, the hydrophilic / water retentive layer 23 on the surface of the fin 22 is uniformly wetted to form a wetted surface. The outside air comes into contact with this wet surface,
Chemical substances such as hydrochloric acid ion, nitrite ion, nitrate ion, ammonium ion, and organic gas contained in the outside air are removed.

The water that has passed through the hydrophilic / water retentive layer 23 reaches the water tank 25b, from which the water is supplied again by the circulation pump 25c provided in the return pipe 25d.
returned to a. Further, new water is constantly replenished from the replenishment system 26, and the replenished portion is discharged to the outside as an overflow portion from the drain pipe 25e. Alternatively, FIG.
As shown in (b), supply makeup water to the hot water coil side,
It is also possible to supply overflow water of the hot water coil to the water tank of the cold water coil through the communication pipe, and cause the drainage direction from the supply water to flow in the opposite direction of the air flow.

The outside air from which the chemical substances have been removed after passing through the heating coil 6 then passes through the reheating coil 7 and is reheated there. The temperature of the reheated supply air is detected by the dry-bulb thermometer 12 on the downstream side, and the flow rate of the heat medium supplied to the reheating coil 7 is controlled via a controller (not shown) according to the detected value. To be done. In this way, the outside air is processed through the coils 5 to 7 so as to satisfy the preset temperature and humidity conditions. Thereafter, the treated outside air is pressure-fed by the fan 8, passes through the high-performance filter 9, and is supplied to the clean room.

On the other hand, in winter, the cooling coil 5 is used.
However, the cooling coil 5 is used as a coil for forming a wet surface, or the cooling coil is used as a preheating coil. That is, water is supplied to the cooling coil 5 from the water supply means 24 attached to the cooling coil 5, and the hydrophilic / water-retaining layer 23 on the fin surface of the cooling coil 5 is supplied.
Is a wet surface containing water over the entire surface. Then, the wet surface thus formed is brought into contact with outside air, and chemical substances such as hydrochloric acid ions, nitrite ions, nitrate ions, ammonium ions, and organic gas are removed from the outside air. In the winter, the outside temperature is low and the wet surface of the fin surface of the cooling coil 5 may freeze. In this case, cooling water after use is poured into the cooling coil 5 to freeze it. It is also possible to prevent preheating and perform pre-humidification.

Further, in the winter season, a wetting surface is formed on the fin surface of the heating coil 6 in addition to the cooling coil 5, and this wetting surface is used for controlling humidity. That is, the heating medium is supplied to the heating coil 6 and water is supplied to the fin surface through the water supply means 24 to form a wet surface. As a result, the outside air is heated and simultaneously humidified. The amount of heat medium supplied to the heating coil 6 is controlled while the dew point thermometer 11 detects whether or not the outside air at this time has reached a preset dew point. After that, the outside air is further heated by the reheating coil 7. At this time, the outside air temperature after reheating is detected by the dry-bulb thermometer 12, and the heat medium supplied to the reheating coil 7 is detected according to the detected value. The flow rate is controlled via a control device (not shown). After that, the treated outside air is blown by the fan 8
It is the same as in the case of summer when it is pressure-fed by, and is passed through the high-performance filter 9 to be supplied to the clean room.

In addition, in the above-described embodiment, the cooling coil 5 or the heating coil 6 includes the coils 5, 6
A replenishment system 26 of the water supply means 24 is arranged on the downstream side of the flow of the air flowing into the chamber, and a circulation system 25 is arranged on the upstream side of the flow of the air. This is because in order to remove the chemical substances in the air, it is best to bring them into contact with water that does not contain the chemical substances, and the removal process is not advanced on the upstream side of the air, but the chemical concentration is high. The concentration of chemical substances in the air decreases on the downstream side where the fin surface comes into contact with water and is absorbed and removed. In order to further remove the low-concentration chemical substance, clean makeup water is supplied to the fin surface on the air downstream side, thereby improving the chemical removal effect. FIG. 1 (b) shows a system in which the flow of water supplied to the cooling coil 5 and the hot water coil 6 and corresponding to the flow of water is made to correspond by the same idea.

Next, another embodiment of the heat exchange coil for the cooling coil or the heating coil will be described. Figure 5
The heat exchange coil for the cooling coil or the heating coil shown in FIG. 7 is a hydrophilic / water-retentive layer provided on one surface (upper surface) of the fin 32 in which the fins 32 of the coil body 31 are inclined and inclined. This is an example of a so-called mixed flow / cross flow method in which water is supplied from the upper side of the water and flows toward the lower side using gravity to form an air flow that is orthogonal to the water flow. .

The heat exchange coil 30 includes a coil body 31 for flowing a heat medium, and a large number of fins welded or fixed to the coil body 31 to increase the surface area of the coil body 31 and arranged in parallel with each other. And 32. Further, the above-mentioned hydrophilic / water-retaining layer is provided on the upper surface of the fin 32, and the water supply means 34 for supplying water to the hydrophilic / water-retaining layer is provided.

Alternatively, the water supply means 34 comprises a circulation system 35 for circulating the hydrophilic / water-retaining layer and a replenishing system 36 for newly replenishing water above the hydrophilic / water-retaining layer.
5 is arranged on the upstream side of the flow of air flowing into the heat exchange coils 30, and the replenishment system 36 is arranged on the downstream side of the air flow. Further, the point that the water tank 35b is arranged below the coil body 31 and the water distribution pipe 35e is provided in the water tank 35b is the same as that shown in FIG. 3 and FIG. 4 described above.

In the heat exchange coil 30 shown here, the fins 32 are arranged obliquely so that they have a predetermined angle θa with respect to the horizontal plane, and only the upper surface side of the fins 32 is hydrophilic and water-retaining. Layers are provided, and the water supply pipes 3 of the circulation system 35 and the replenishment system 36 of the water supply means 34 are provided.
5a and 36a are arranged in an upright state, and
The water collecting pad 37 is provided below the diagonally arranged fins 32.
The arrangement is different from the above-described embodiment.

According to the heat exchange coil 30, the water supplied from the water supply pipes 35a and 36a of the circulation system 35 and the replenishment system 36 of the water supply means 34 is supplied from the upper side of the fins 32 arranged obliquely. The entire surface of the hydrophilic / water-retaining layer on the upper surface of the fin 32 is gradually flowed down to the lower side while reaching the water collecting pad 37 while being wetted substantially uniformly. The water that reaches here flows vertically down the water collecting pad 37 and collects in the water tank 35b. The water collected in the water tank is returned to the water supply pipe 35a again by the circulation pump 35c provided in the return pipe 35d.

As described above, the water supplied by the water supply means 44 evenly wets the hydrophilic / water-retaining layer on the upper surfaces of the fins 32 to form a wet surface. At this time, external air comes into contact with the wet surface and the external air Chemical substances such as hydrochloric acid ion, nitrite ion, nitrate ion, sulfate ion, ammonium ion, and water-soluble organic gas contained in are removed.

In the heat exchange coil 40 for the cooling coil or the heating coil shown in FIGS. 8 and 9, water flows diagonally from the downstream side of the air to the upstream side of the hydrophilic / water-retaining layer on the surface of the fins 42 arranged diagonally. This is an example of a so-called mixed flow / counterflow system in which air and water flow in the counterflow direction.

The heat exchange coil 40 is welded or fixed to the coil main body 41 for flowing the heat medium and the coil constituting the coil main body 31 so as to increase the substantial surface area of the coil and is arranged in parallel with each other. Many fins 42
With. The fins 42 have different inclination directions and angles on the downstream side and the upstream side based on the air flow, and the fins on the downstream side (hereinafter, referred to as first fins) 4
2a is inclined at a constant angle θb in the direction A of air flow, and an upstream fin (hereinafter referred to as a second fin) 4a
2b is arranged so as to incline at a constant angle θc in a direction orthogonal to the air flow direction A. The fins 42a and 42b are connected by a triangular connecting fin 42c as shown in FIG.

Further, the above-mentioned hydrophilic / water-retaining layer is provided on one surface (upper surface) of the fins 42a, 42b, and water-supplying means 44 for supplying water to the hydrophilic / water-retaining layer is provided. In the case of this embodiment, the water supply means 44 does not have a circulation system, but is composed only of a replenishment system for newly replenishing water.
The water supply means 44 is composed of a water supply pipe 44a provided upright at the upper end of the fin 42a and a water supply means for supplying water to the water supply pipe 44a.

A water collecting pad 47 is arranged along the lower portion of the second fin. A water tank 45b is arranged below the coil body 41, and a drain pipe (not shown) is provided in the water tank 45b.

According to the heat exchange coil 40, the water supplied from the water supply pipe 44a of the water supply means 44 moves from the upper side to the lower side of the first fins 42a arranged obliquely.
Along the inclination of the fin 42a, the entire surface of the hydrophilic / water-retaining layer on the upper surface of the fin 42a is gradually flowed while being wetted substantially uniformly. Then, it passes through the connecting fin 42c to reach the second fin 42b, and then the second fin 42b.
The water reaches the water collecting pad 47 by flowing in a direction orthogonal to the flow of air so as to follow the inclination direction of. The water that reaches here flows vertically down the water collecting pad 47 and collects in the water tank 45b. The water collected in the water tank 45b is discharged from here via the drain pipe 45e. Alternatively, when the heat exchange coil 40 is a hot water coil, water is supplied from this water tank to the water tank of the cooling coil through the communication pipe, and is used as makeup water for the cooling coil by the pump.

As described above, water is hydrophilic on the upper surface of the fin 42.
The water-retaining layer is uniformly wetted to form a wet surface. At this time, external air comes into contact with the wet surface, and hydrochloric acid ion, nitrite ion, nitrate ion, sulfate ion, ammonium ion, water-soluble Chemical substances such as organic gas are removed.

In this embodiment, all new water is used as makeup water, and this new water is supplied to the downstream side of the air flow, and the air reaches the downstream side of the wetting surface. The cleanliness becomes high, and new water is replenished to the downstream side of the air having the high cleanliness, which is effective for further improving the cleanliness of the air.

In the above-described embodiment, the water supply means are all constituted by a replenishing system for supplying new water, but the present invention is not limited to this, and it is not limited to this. As described above, the water supply means 44 may be composed of a circulation system and a supply system.

[0051]

According to the invention of claim 1, a hydrophilic / water-retaining layer is provided on the surface of the fins of the heat exchange coil body,
Since the water supply means for supplying water to this hydrophilic / water-retaining layer is provided, water is supplied to the hydrophilic / water-retaining layer on the surface of the fins to make it a wet surface, and air is passed through this to remove the air from the air. It is possible to remove water-soluble chemical substances such as hydrochloric acid ion, nitrite ion, and nitrate ion. In addition, by adding water to the hydrophilic / water-retaining layer on the surface of the fins of the heat exchange coil body, the air flowing therethrough can be humidified, and a special steam humidifier or water spray can be used as a humidifier. No need for a humidifier.

According to the second aspect of the invention, since the water supply means is composed of a circulation system for circulating the hydrophilic / water-retaining layer and a replenishing system for newly replenishing water, the hydrophilic / water-retaining layer is provided. It is excellent in that the amount of water used as a wet surface can be reduced and the amount of water used can be reduced.

According to the third aspect of the present invention, the replenishment system comprises:
On the downstream side of the flow of air flowing into the heat exchange coil,
The circulation system is arranged on the upstream side of the air flow, respectively, and fresh water is replenished on the downstream side of the highly clean air, which is advantageous for removing chemical substances from the air and improving the air cleanliness. is there.

According to the fourth aspect of the invention, the water supply means supplies water by the coil surface on the downstream side of the air flow flowing into the heat exchange coil, and collects water on the upstream side of the air flow. Since it has a collecting mechanism, it is advantageous to increase the air cleanliness by removing chemical substances from the air as in the case of the third aspect of the invention.

According to the fifth aspect of the present invention, the water supply means supplies water to the hydrophilic / water-retaining layer via the water supply pad arranged so as to contact the heat exchange coil body. Water can be uniformly supplied to the layers, which is advantageous for forming a uniform wetting surface in the hydrophilic / water-retaining layers.

According to the sixth aspect of the present invention, the water supply means collects water from the hydrophilic / water-retaining layer via the water collecting pad arranged so as to contact the heat exchange coil body. Water can be gradually dropped over the entire surface from the downstream side of the hydrophilic / water-retaining layer, which is advantageous in forming a uniform wetting surface.

According to the invention of claim 7, claims 1 to
Since the heat exchange coil according to any one of 5 is provided as a cooling coil and a heating coil, respectively, the cooling coil and the heating coil function as a humidifying device, and similarly to the invention according to claim 1, steam humidification No special humidifier is required. Therefore, the air conditioner can be downsized.

According to the eighth aspect of the present invention, water is supplied from the water supply means to the hydrophilic / water-retaining layer on the surface of the heating coil which is not in operation in summer, and the surface of the cooling coil which is not in operation in winter. Since the water is supplied from the water supply means to the hydrophilic / water-retaining layer, the coil can be effectively used while the operation is stopped.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an air conditioner of the present invention.

FIG. 2 is a perspective view illustrating a hydrophilic / water-retaining layer of the heat exchange coil used in the same embodiment.

FIG. 3 is a perspective view showing an embodiment of a heat exchange coil of the present invention.

FIG. 4 is a front view showing the same embodiment.

FIG. 5 is a perspective view showing another embodiment of the heat exchange coil of the present invention.

FIG. 6 is a front view showing another embodiment.

FIG. 7 is a plan view showing the same embodiment.

FIG. 8 is a perspective view of a main part showing still another embodiment of the heat exchange coil of the present invention.

FIG. 9 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

1 External conditioner 2 casing 5 Cooling coil (heat exchange coil) 6 heating coil (coil for heat exchange) 11 Dew point thermometer 12 Dry bulb thermometer 21 coil body 22 fins 23 Hydrophilic / Water retentive layer 24 Water supply means 25 Circulatory system 26 Supply system 27 Water supply pad 37 Water collecting pad

Claims (8)

[Claims] 1. A heat exchange comprising: a hydrophilic / water-retaining layer provided on a surface of a fin of a heat-exchange coil body; and a water supply means for supplying water to the hydrophilic / water-retaining layer. Coil. 2. The heat exchange coil according to claim 1, wherein in the water supply means, the water supplied to the upper part of the hydrophilic / water-retaining layer passes through the hydrophilic / water-retaining layer and the lower part of the hydrophilic / water-retaining layer. The heat that is characterized by a circulation system that supplies the water recovered there again to the upper part of the hydrophilic / water-retaining layer and a replenishment system that newly supplies water to the upper part of the hydrophilic / water-retaining layer. Replacement coil. 3. The heat exchange coil according to claim 2, wherein the replenishment system is arranged on the downstream side of the air flow flowing into the heat exchange coil, and the circulation system is arranged on the upstream side of the air flow. A heat exchange coil characterized by 4. The heat exchange coil according to claim 1, wherein the water supply means supplies water by a coil surface on a downstream side of a flow of air flowing into the heat exchange coil, A coil for heat exchange, comprising a mechanism for collecting water on the upstream side. 5. The heat exchange coil according to claim 1 or 2, wherein the water supply means is a hydrophilic / water retentive layer via a sponge-like water supply pad arranged to be in contact with the heat exchange coil body. A heat exchange coil, characterized in that water is supplied to the coil. 6. The heat exchange coil according to claim 1 or 2, wherein the water supply means is provided with a sponge-like water collecting pad arranged so as to be in contact with the heat exchange coil body. A heat exchange coil characterized by collecting water from a layer. 7. An air conditioner comprising the heat exchange coil according to claim 1 as a cooling coil and a heating coil, respectively. 8. A method of air conditioning using the air conditioner according to claim 7, wherein water is supplied from a water supply means to the hydrophilic / water-retaining layer on the surface of the heating coil which is not in operation in the summer and in the winter. An air conditioning method using an air conditioner, characterized in that water is supplied from a water supply means to a hydrophilic / water-retaining layer on the surface of a cooling coil which is not in operation.