JP2008256330A - Water droplet releasing device and air-conditioner mounted therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water droplet releasing device constructed to promote the scattering of water droplets and to prevent contact with water repellent processed faces, and to provide an air-conditioner mounted therewith. <P>SOLUTION: The water droplet releasing device comprises a metal member 10 for producing condensed water droplets, a cooling means (a Pelletier element) 20 for cooling the metal member, and heat release fins 40. The metal member 10 has mutually opposed faces to which water repellent processing is applied with unevenness formation and chemical vapor deposition. A space between the water repellent processed faces is such that a finger cannot be inserted thereinto. The water repellent faces each have a water droplet contacting angle of 170° or larger. The metal member is formed in a rectangular pipe-like shape, in a U-shape with a one set of opposed faces, or in a comb-like shape with a plurality of plate materials inserted between the U-shape. This construction promotes the scattering of condensed water droplets from the water repellent processed faces of the metal member and prevents finger contact with the water repellent processed faces. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water droplet discharge device and an air conditioner equipped with the water droplet discharge device, and more particularly to a water droplet discharge device that prevents a drop in water repellency and promotes water droplet scattering.

  As a conventional technique for scattering fine water droplets, for example, Patent Document 1 discloses a technique for scattering fine condensed water droplets generated on a water-repellent treatment surface by cooling and condensing a water-repellent cooling plate. This water droplet discharge device is applied to the ceiling of the refrigerator's vegetable compartment.

According to this patent document 1, the condensed water collected in the refrigerator is discharged again into the vegetable compartment as fine condensed water droplets and used for preventing the drying of vegetables. Since the water repellency is lowered when, for example, vegetables come into contact with the surface of the cooling plate subjected to the water repellency treatment, a lattice-shaped contact prevention member is provided.
JP 2004-232902 A

  As described above, the surface of the cooling plate subjected to the water repellent treatment disclosed in Patent Document 1 is covered with fine irregularities. When a finger or the like comes into contact with this surface, fine irregularities on the surface of the cooling plate are broken and the water repellency is lowered. For this reason, the cooling plate that has been subjected to the water-repellent treatment needs to be careful not to come into contact with the water-repellent surface during the manufacturing process, and there is a problem that it is difficult to handle. Further, not only during the manufacturing process but also when using the product, it is necessary to provide a contact preventing member so that the user does not touch the cooling plate with hands or vegetables.

  By the way, since this cooling plate can discharge condensed water as fine water droplets, when the cooling plate is mounted on an indoor unit of an air conditioner, the air supplied to the room by the air conditioner includes fine water droplets. be able to. As a result, the temperature of cold air can be lowered by the latent heat of evaporation of fine water droplets during cooling operation.

  However, since the space in which the air conditioner scatters water droplets is wider than the space in the refrigerator, it is necessary to increase the amount of water droplets to be released in order to obtain the effect. When the amount of water droplets discharged is increased by enlarging the cooling plate, the cooling plate becomes large and may not be mounted on the air conditioner. Therefore, in order to mount it on an air conditioner, it is necessary to release many water droplets without making the cooling plate as large as possible.

  An object of the present invention is to provide a water droplet discharge device that maintains the water repellency of a water repellent treated surface, or an air conditioner equipped with the water droplet discharge device. Moreover, it is providing the water droplet discharge | release apparatus which promotes scattering of a water droplet, or an air conditioner provided with this water droplet discharge | release device.

In order to solve the above problems, the present invention mainly adopts the following configuration.
In a water droplet discharge apparatus comprising a metal member that generates condensed water droplets and a cooling means that cools the metal member, the metal member has opposed surfaces that face each other, and the opposed surface has an uneven surface formation and chemical structure. It is set as the structure which performed the water-repellent process by vapor deposition.

  Further, in the water droplet discharge device, the surface subjected to the water repellent treatment is configured such that the contact angle of the water droplet is 170 ° or more. Furthermore, in the water droplet discharge device, the metal member is a rectangular tubular metal member. Further, in the water droplet ejection device, the metal member is a U-shaped metal member having a pair of opposed surfaces. Furthermore, in the water droplet ejection device, the metal member has a comb-teeth shape in which a plate material subjected to water repellent treatment is interposed between a U-shaped metal member having a pair of opposed surfaces, It is set as the structure which is a dimension which cannot insert a finger | toe between the comb teeth. Furthermore, the said water droplet discharge | release apparatus WHEREIN: The said metal member is set as the structure which is the pin shape of the column or the prism which was provided in multiple numbers by the board | plate material and the said board | plate material vertically and horizontally.

  According to the present invention, it is possible to prevent a decrease in water repellency. In addition, it is possible to promote the scattering of condensed water droplets generated on the water repellent surface and to increase the amount of water droplets released. Moreover, when the water droplet discharge device of the present invention is applied to an air conditioner, air containing fine water droplets can be supplied into the room.

  A water droplet discharge device according to an embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a perspective view showing a configuration of a water droplet ejection apparatus according to the first embodiment of the present invention. FIG. 2 is a flowchart showing the water-repellent treatment process according to this embodiment. FIG. 3 is a view showing the water repellency depending on the contact angle between the surface of the water repellent metal plate and water droplets according to this embodiment. FIG. 4 is a diagram illustrating scattering characteristics of condensed water droplets according to the present embodiment.

  FIG. 5 is a perspective view showing a configuration of a water droplet ejection apparatus according to the second embodiment of the present invention. FIG. 6 is a perspective view showing a configuration of a water droplet ejection apparatus according to the third embodiment of the present invention. FIG. 7 is a diagram showing one configuration example in which the water droplet discharge device according to the embodiment of the present invention is mounted on an air conditioner. FIG. 8 is a diagram showing another configuration example in which the water droplet discharge device according to the embodiment of the present invention is mounted on an air conditioner. FIG. 9 is a perspective view showing the configuration of the water droplet discharge device shown in FIG.

“First Embodiment”
The structure of the water droplet discharge device according to the first embodiment of the present invention will be described with reference to FIG. In the present embodiment, since the rectangular tubular metal member 10 is used as the metal member, two sets of opposing surfaces are provided on the inside thereof. The surfaces of the two opposing surfaces are water-repellent (described in FIG. 2 described later), the distance between the opposing water-repellent surfaces is 5 millimeters, and each water-repellent surface is a long side. Is 25 millimeters and the short side is 5 millimeters. Incidentally, when a plate material is used as a metal member as in the prior art, it is necessary to pay attention to the manufacturing process and use so that a finger or the like does not touch the water repellent surface of the surface.

  On the other hand, it can make it difficult to touch a water-repellent surface by having an opposing surface in a metal member like this embodiment. Further, when a rectangular tube is used for the metal member and the inner surface is subjected to water repellent treatment, for example, even during the manufacturing process, the outer surface of the tube may be retained when the metal member is retained. It is easy to handle because it is hard to touch. In addition, since the distance between the water-repellent treatment surfaces is 5 mm, it is difficult to put a fingertip into the opening of the metal member, and the water droplet discharge device of this embodiment does not require a contact prevention member as in the prior art. It can be.

  In this embodiment, the Peltier element 20 is used as a cooling means for the metal member. A direct current power source 30 is connected to the Peltier element 20, and when a current is passed, a cooling surface is formed on one surface and a heat radiating surface is formed on the back surface. In the present embodiment, the cooling surface of the Peltier element 20 is in contact with the rectangular tubular metal member 10, and the heat dissipation surface is in contact with the heat dissipation fins 40. Each contact surface is coated with thermally conductive silicon grease to facilitate heat exchange. Furthermore, since the outer periphery of the rectangular tubular metal member 10 is covered with the heat insulating material 19, dew condensation occurs only on the inner surface of the metal member 10 when being cooled by the Peltier element 20.

  Next, the water repellent treatment applied to the inner surface of the metal member 10 will be described with reference to FIG. In the present embodiment, the processing steps shown in FIG. 2 are performed, and the aluminum member metal member 10 is provided with fine irregularities on the surface by etching treatment and hydration oxidation treatment, and a single fluorine compound having water repellency on the surface. The molecular film is formed by chemical vapor deposition. In this embodiment, the water repellent treatment is applied to the aluminum alloy metal member 10, but the aluminum metal member can also be treated. In other words, the water repellent treatment is performed on the inner surface of the metal member by the formation of unevenness and the chemical vapor deposition treatment (the flow itself in FIG. 2 is conventionally known).

  The water repellency will be described. Generally, the water repellency is evaluated by the angle formed between the liquid surface and the solid surface when water drops are placed on the solid surface and the liquid surface is in equilibrium. This angle is called the contact angle (that is, the contact angle is the angle formed between the tangent formed by the water drop and the metal surface at the contact point where the water drop is in contact with the metal surface). If the contact angle θ is 150 ° or more, the water repellency is higher and the water repellency is super water repellency. The contact angle θ can be set to 170 ° or more on the water repellent surface used in the present embodiment.

  FIG. 3 is a photograph of a 0.5 microliter water droplet 16 collected on the surface of the metal plate 13 subjected to the water repellent treatment used in the present embodiment. From this photograph, the contact angle θ can be measured to be 170 ° or more, and it can be seen that the water repellent treatment used in this embodiment has high water repellency. On the surface having such a high water repellency, since the influence of the surface tension is small, the water droplet is easily separated from the surface. By contacting and coalescing fine water droplets, the total surface area is reduced and the surface white energy is also reduced. This reduced amount is converted into kinetic energy, which causes a phenomenon that fine water droplets scattered from the surface are scattered. That is, when the contact angle, which is the angle formed between the tangent at the contact point of the water droplet and the metal surface, is 90 ° or more, the water droplet tends to be detached from the metal surface, and the water droplets coalesce into one. As a result, the total surface free energy is reduced, so that the reduced amount is converted into kinetic energy, which becomes the energy of splashing water droplets (this is described in Patent Document 1 described above).

  In the present embodiment, the rectangular tubular metal member 10 having the inner surface subjected to the water-repellent treatment as described above is cooled using the Peltier element 20. When the inner surface of the metal member 10 becomes below the dew point temperature of the surrounding air by cooling, the inner surface of the metal member 10 is condensed and covered with countless fine condensed water droplets. As these condensed water droplets grow over time, they come into contact with neighboring condensed water droplets and coalesce from the surface. In addition, when the diameter of the water droplets at the time of scattering was observed, it was uneven because it depended on the distance to the adjacent water droplets, etc., but was approximately 30 micrometers or less in diameter.

  Moreover, the distance which a condensed water droplet scatters is demonstrated using FIG. FIG. 4 shows an observation of the locus of condensed water droplets 17 (water droplets after coalescence) scattered from the water repellent treatment surface 15 arranged perpendicular to the plane 14. The water-repellent surface 15 is cooled by the Peltier 20 to produce condensed water droplets 17 at a height of 25 millimeters. The condensed water droplets 17 were scattered and reached the flat surface 14 at about 30 mm from the contact point between the water repellent surface 15 and the flat surface 14 (depending on the experimental result). Since the condensed water droplet 17 has a large particle size among the condensed water droplets generated in the metal member 10 of the present embodiment (for the sake of ease of observation, it is intended for a large particle size). It can be estimated that condensed water droplets (water droplets of 30 micrometers or less) generated on the water-repellent surface are scattered farther than the distance at which the condensed water droplets 17 are scattered.

  In the present embodiment, on the inner surface of the rectangular tubular metal member 10, the distance between the two opposing water-repellent surfaces is within 30 mm, so condensed water droplets scattered from one surface are generated on the opposite surface. It collides with another condensed water droplet and merges into a single condensed water droplet. Normally, it does not scatter unless it grows in contact with the adjacent condensed water droplets, but by colliding with condensed water droplets with a small diameter on the opposing surface, condensed water droplets with a small diameter on the opposing surface can also be scattered. In the embodiment, scattering of condensed water droplets can be promoted by disposing the water-repellent treatment surfaces facing each other. In other words, normally, adjacent water droplets on the same surface gradually grow and become larger, coalesce and fly, but if they collide with water droplets from the opposite surface and merge, It will grow and scatter.

  By the way, the condensed water droplets on the water-repellent treatment surface gradually increase in particle size as time passes, covering the metal member, and narrowing the area where the metal member contacts the surrounding air. Although the amount of condensed water droplets that are generated decreases as the condensation area decreases, in this embodiment, the scattering of condensed water droplets can be promoted, so that the water-repellent treated surface is prevented from being covered with large water droplets, and condensed water droplets are prevented. That is, it becomes possible to increase the amount of water droplets to be released.

  In the present embodiment, the rectangular tubular metal member 10 is cooled by the Peltier element 20. In the present embodiment, the rectangular tubular metal member 10 having four water-repellent treatment surfaces on the inside is cooled with respect to one cooling means, so that it is compared with the conventional technique in which one metal plate is cooled by the same cooling means. Then, the surface area on which the condensed water droplets are condensed is enlarged, and the amount of fine condensed water droplets that are scattered can be increased. Further, in order to increase the surface area, a plurality of metal members may be arranged. For example, by arranging a plurality of metal members 10 of this embodiment in contact with each other (the rectangular tubular metal member 10 shown in FIG. 1 is placed on the Peltier element in the drawing). To prevent contact with the water-repellent surface and increase the surface area where condensed water droplets are generated.

  Moreover, the rectangular tubular metal member 10 of the present embodiment may be a cylindrical metal member. The water repellency does not decrease even if the outer surface is contacted by applying water repellency treatment to the inner surface of the cylindrical metal member. Further, it is better if the inner diameter of the cylindrical metal member is 5 mm or less, which makes it difficult to put a finger into the inner diameter of the metal member, and the water-repellent treated surface is not provided with a contact prevention member. It is possible to protect the water repellent surface.

  Further, the metal member 10 may be U-shaped (the U-shaped opening may be upward or sideward in the example of FIG. 1), and even in this shape, a pair of opposing repellent members Effective because it has a water treatment surface. At this time, if the distance between the opposing water-repellent surfaces is 5 mm or less, it is difficult to put a finger into the opening of the metal member, and the water-repellent surface of the water-repellent surface is not provided with a contact prevention member. Can be prevented. Moreover, this metal member does not necessarily need to be parallel in the opposing surface.

“Second Embodiment”
Next, a water droplet discharge device according to a second embodiment of the present invention will be described with reference to FIG. The metal member 11 in the present embodiment adds two metal plate members so as to be parallel to a set of opposing surfaces provided in the U-shaped metal member which is a modified example of the first embodiment, Each plate has a comb-like shape with water repellent treatment on both surfaces (two comb teeth provided inside the U-shaped space are metal plates). By making the metal member 11 into a comb-teeth shape, a plurality of sets of opposing surfaces can be formed, so that the effect of promoting the scattering of water droplets can be obtained as in the case of a rectangular tube. In addition, since the comb-shaped metal member 11 has two plate materials that have been subjected to water repellent treatment on both sides, the surface area is enlarged, and it becomes possible to easily promote the scattering of water droplets.

  Furthermore, the comb-shaped metal member 11 of the present embodiment has a structure in which a finger cannot be inserted from the opening by setting the interval between the comb teeth to 5 mm or less, and handling at the time of manufacturing or the like becomes easy. ing. Further, even if the size of the entire metal member 11 is increased by narrowing the interval between the comb teeth, the inner water-repellent treatment surface cannot be touched from the opening, so that a contact preventing member is required. Without increasing the size of the metal member 11, it becomes easy to increase the amount of water droplets scattered.

  In the present embodiment, the metal member 11 is arranged so that the comb-shaped mold faces downward in the water droplet discharge device (the U-shaped opening is directed downward), thereby promoting the scattering of condensed water droplets (gravity of the water droplets). Effect), the structure increases the amount of splashed water droplets. The comb-shaped metal member 11 is oriented vertically as shown in FIG. 5 (the bottom of the U-shape is disposed above), thereby preventing condensed water droplets from accumulating on the inner surface of the metal member 11. can do. In other words, in this embodiment, the U-shaped opening is facing downward, and the two plate members are arranged so that water droplets do not accumulate on the plate member with the open end portion facing downward.

“Third Embodiment”
Next, a water droplet discharge device according to a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the metal member as a water droplet discharge device is a pin fin type. The pin fin shape shown in the figure can be configured with a plurality of pairs of opposing surfaces by installing a large number of pins (not limited to a cylindrical shape but may be a prismatic shape), so that the rectangular tube shown in FIG. As in the case of the comb-tooth type shown in FIG.

  Further, by reducing the distance between adjacent pins, it is possible to prevent contact with the water-repellent surface and increase the surface area where pseudo-condensed water droplets are generated. This makes it easy to increase the amount of pseudo-condensed water droplets that scatter. Further, in the comb-shaped metal member 11 shown in FIG. 5, the air passing through the metal member is blocked by the installation direction (if the air is configured to flow along the recess formed by the comb teeth, the air It is not dammed, but air is dammed if the comb-tooth plane is formed so as to face the air flow), and condensed water droplets adhering to the surface of the metal member will accumulate inside without scattering There was a fear.

  On the other hand, the pin fin type metal member (cooling member) 12 shown in FIG. 6 is composed of a single plate member (ceiling plate in the figure) and a large number of pointed portions, so that air is blocked in the metal member. Therefore, it is possible to prevent the condensed water droplets from being accumulated inside without being scattered without considering the flow path of the flowing air.

“Fourth Embodiment”
Next, one configuration example in which the water droplet discharge device according to the embodiment of the present invention is mounted on an air conditioner will be described with reference to FIG. The water droplet discharge device includes a rectangular tubular metal member 10, a Peltier element 20 that cools the metal member 10, and a heat dissipation fin 40 provided on a heat dissipation surface of the Peltier element 20 (see FIG. 1).

  The air conditioner according to the present embodiment takes in indoor air from the grill 50, exchanges heat with the heat exchanger 90 and cools it, and then discharges it into the room through the outlet 60. In this embodiment, a water droplet discharge unit 80 is provided next to the heat exchanger 90, and this unit 80 includes the above-described water droplet discharge device, a blow hand throw 81 that sends room air to the heat radiating fin 40, and a blow unit 81. It consists of a partition plate 82 that divides the flow path of the sent air into two parts, and an opening (not shown) for discharging the air heated by the heat radiation fin 40 to the outside of the water droplet discharge unit 80. . The partition plate 82 divides the flow path into two in order to flow the air from the air blowing means 81 to the heat radiating fin 40 side and the metal member 10 side as indicated by arrows.

  When the water droplet discharge unit 80 is operated, the inner surface of the rectangular tubular metal member 10 is dewed, covered with countless pseudo-condensed water droplets, and scattered. The condensed water droplets are discharged toward the air outlet 60 by the air from the air blowing means 81, mixed with the heat exchanged air discharged from the air outlet 60, and released into the indoor space. As described with reference to FIG. 1, the water droplet discharge device promotes the scattering of pseudo-condensed water droplets by making the water-repellent treatment surfaces face each other. In the present embodiment, the indoor air sent from the blower 81 is flowed on the water repellent treatment surface, thereby not only promoting the scattering of the condensed water droplets on the opposite surface but also causing the condensed water droplets on the same plane to collide with each other. It is possible to promote the scattering of the pseudo-condensed water droplets and further increase the discharge amount of the condensed water droplets.

  The amount of water released into the space of the water droplet discharge device mounted on the air conditioner according to the present embodiment varies depending on the environment in which the air conditioner is installed, but can be estimated from the following experiment. The experiment was carried out in an environment of room temperature of 20 ° C. and relative humidity of 60% using a rectangular metal member having a side of 25 mm. At this time, it has been confirmed by experiments that about 2000 milligrams of water per hour are released into the space. As a result, the water droplet ejection device according to the present embodiment is simple because the distance between the inner facing water-repellent treatment surfaces is 5 millimeters, and each water-repellent treatment surface has a long side of 25 millimeters and a short side of 5 millimeters. From the area ratio of the water-repellent surface, it can be estimated that about 80 milligrams of water can be released per hour.

Actually, the amount of moisture released varies depending on the wind speed as well as the area ratio of the water repellent surface. When the area of the water repellent surface increases, it tends to increase, and when the area of the water repellent surface decreases, it tends to decrease. In addition, if the wind speed is high, the amount of water taken away there increases, so that the amount of water released tends to increase. If the cross-sectional area of the rectangular tube (the part through which air passes) is reduced, the wind speed increases.
Here, in consideration of the mountability to the air conditioner, the distance between the water-repellent treatment surfaces is 15 millimeters (about ± 2 millimeters), and the short side of each water-repellent treatment surface is 15 millimeters (about ± 2 millimeters). In this case, the long side of each water-repellent surface is about 15 to 25 millimeters. Even if it is not about 2000 milligrams per hour, an appropriate amount of water can be obtained by balancing the decrease in the amount of water released by reducing the water-repellent surface and the increase in the amount of water released by increasing the wind speed. Can do.

  The air provided to the indoor space by the air conditioner according to the present embodiment is air in which condensed water droplets are mixed. However, the particle size of the condensed water droplets is as small as about 30 micrometers, and the mass of the condensed water droplets is light, so heat exchange is performed. It is easy to fly away with the air. As a result, it is possible to prevent the inconvenience that the condensed water droplet falls near the outlet 60 and wets the room. Moreover, the air in which condensed water droplets are mixed has an effect of making it easier for the user to experience the cooling effect during cooling operation. During the cooling operation, fine condensed water droplets are discharged into the room together with the cold air subjected to heat exchange. The condensed water droplets released into the room take away latent heat when evaporating, so that the user can easily experience the cooling effect. In addition, although the thing of FIG. 1 illustrated the water droplet discharge | release apparatus applied to the air conditioner, it is not restricted to this, A square shape, a comb-tooth type, or a pin fin type is applicable (5th Embodiment mentioned later). But the same).

“Fifth Embodiment”
Next, another configuration example in which the water droplet discharge device according to the embodiment of the present invention is mounted on an air conditioner will be described with reference to FIGS. 8 and 9. FIG. 8 is a longitudinal sectional view of the air conditioner according to the present embodiment, and the water droplet discharge device is installed at the outlet 60. FIG. 9 shows details of the water droplet discharge device mounted on the air conditioner according to this embodiment.

  The water droplet discharge device uses a metal plate 41 as the heat radiating means and radiates heat using the air flowing through the outlet 60. Part of the air passes through the inner surface of the rectangular tubular metal member 10, promotes the scattering of the condensed water droplets, and releases the condensed water droplets to the heat-exchanged air discharged from the outlet 60. The cool air discharged from the outlet 60 has a large air volume and a fast flow. Therefore, in this embodiment, it is possible to dissipate heat without installing a blower for heat dissipation by attaching a water droplet discharge device to the air outlet 60. Moreover, since the air discharged from the outlet 60 has a low temperature and a high relative humidity, the air passing through the metal member is likely to condense.

  As described above, the water droplet discharge device according to the embodiment of the present invention reduces the water repellency due to the contact with the water repellent treated surface by performing the water repellent treatment on the opposing surfaces of the metal member. In addition to being able to prevent this, the main feature is that the amount of fine water droplets generated can be increased by promoting the scattering of condensed water droplets.

It is a perspective view which shows the structure of the water droplet discharge | release apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the process of the water repellent process regarding this embodiment. It is a figure which shows the water repellency by the contact angle of the surface of the water-repellent treatment metal plate regarding this embodiment, and a water droplet. It is a figure showing the scattering characteristic of the condensed water droplet regarding this embodiment. It is a perspective view which shows the structure of the water droplet discharge | release apparatus which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the structure of the water droplet discharge | release apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows one structural example which mounts the water droplet discharge | release apparatus which concerns on embodiment of this invention in the air conditioner. It is a figure which shows the other structural example which mounts the water droplet discharge | release apparatus which concerns on embodiment of this invention in the air conditioner. It is a perspective view which shows the structure of the water droplet discharge | release apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rectangular tubular metal member 11 Comb-shaped metal member 12 Pin fin type metal member 13 Water repellent treatment surface 14 Plane 15 Water repellent treatment surface 16 Water droplet 17 Water droplet 18 Water droplet 19 Heat insulating material 20 Peltier element 30 Power supply 40 Radiation fin 41 Radiation plate 50 Grill 60 Air outlet 70 Louver 80 Water droplet discharge unit 81 Blowing means 82 Partition plate 90 Heat exchanger 100 Ventilation path

Claims (13)

In a water droplet discharge apparatus comprising: a metal member that generates condensed water droplets; and a cooling means that cools the metal member.
The metal members have opposing surfaces facing each other;
A water droplet discharge device characterized in that the opposite surface is subjected to water repellency treatment by forming an uneven surface and chemical vapor deposition. In claim 1,
The water droplet discharge device characterized in that the surface subjected to the water repellent treatment has a contact angle of water droplets of 170 ° or more. In claim 1 or 2,
The water droplet discharge device according to claim 1, wherein the metal member is a rectangular tubular metal member. In claim 1 or 2,
The water droplet discharge apparatus according to claim 1, wherein the metal member is a U-shaped metal member having a pair of opposing surfaces. In claim 1 or 2,
The metal member has a comb-like shape in which a water-repellent plate material is interposed between U-shaped metal members having a pair of opposing surfaces, and the interval between the comb teeth is inserted between fingers. A water droplet discharge device characterized in that it cannot be dimensioned. In claim 1 or 2,
The metal member has a plate shape and a pin shape of a cylinder or a prism that is provided in a plurality of length and width on the plate material. In claim 1, 2, 3 or 4,
The water droplet discharge device characterized in that the interval between the surfaces subjected to the water repellent treatment is such that the condensed water droplets scattered from one surface can collide with the condensed water droplets on the opposite surface. In claim 1, 2, 3 or 4,
The water droplet discharging device according to claim 1, wherein a distance between the surfaces subjected to the water repellent treatment is 5 mm or less where a finger cannot be inserted. In claim 1, 2, 3 or 4,
A water droplet discharge device using a Peltier element as the cooling means.   An air conditioner including the water droplet discharge device according to any one of claims 1 to 6. In claim 10,
The air conditioner is characterized in that the water droplet discharge device is installed at an air outlet of an indoor unit in the air conditioner, and the air discharged from the air outlet flows in a space between opposing surfaces of the metal member. In claim 11,
An air conditioner characterized in that a Peltier element is used as the cooling means, and a heat radiation surface of the Peltier element or a heat radiation plate provided on the heat radiation surface is disposed at the air outlet. In claim 10,
The water droplet discharge device is installed in the vicinity of the air outlet of the indoor unit in the air conditioner, and further, a space between the opposing surfaces of the metal member separately from the first air blowing means provided in the air conditioner. Providing a second air blowing means for supplying air to
The air from the second blowing unit is guided to the air outlet through the space between the opposing surfaces.