JP2016023850A - Cool air fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cool air fan showing a superior vaporization efficiency and capable of positively getting cooling effect.SOLUTION: This invention relates to a cool air fan in which a vaporization filter 2 is provided near a rear surface 10B of a casing 10. The vaporization filter 2 is constituted in such a way that a first corrugated band made of pine pulp and solidification agent with corrugated irregularity being formed in a forward downward inclination state and having entire vertical fine band-like shape and a second corrugated band with corrugated irregularity being formed in a rearward downward inclination state and having entire vertical fine band-like shape are alternatively laminated in a lateral direction, many small holes 13 are formed by the first corrugated band and the second corrugated band. Water is supplied from above the vaporization filter 2, air is passed through the small holes 13 while water is being flowed down and cooling is carried out by vaporization heat.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cold air fan.

  Conventionally, there has been a cold air fan that sends air cooled by using the heat of vaporization of water by a blower fan and supplies the air into a room (see Patent Document 1).

JP 2010-38523 A

  However, conventional cold air fans try to absorb the heat from the air around the vaporization filter by applying air to the vaporization filter and vaporize the water to obtain a cooling effect. The vaporization efficiency was poor, and a sufficient cooling effect could not be obtained. Accordingly, there is a problem that even when a conventional cold air fan is used in a hot and humid room in summer, the water in the vaporizing filter hardly evaporates and the room temperature cannot be lowered.

  Then, an object of this invention is to provide the cold wind fan which is excellent in the vaporization efficiency of water and can acquire the cooling effect reliably.

  The cold air fan according to the present invention is a cold air fan in which a vaporization filter is disposed in the vicinity of the rear surface of the casing. The vaporization filter is made of pine pulp and a solidifying agent, and corrugated irregularities are formed in a downwardly inclined manner. In addition, first corrugated strips having a vertically elongated strip shape, and second corrugated strips having corrugated irregularities formed in a backward and downwardly inclined manner and the entire vertically striped strip shape are alternately stacked in the left-right direction. A large number of small holes are formed by the first corrugated band and the second corrugated band. In use, water is supplied from above the vaporizing filter and allowed to flow down, and the air passes through the small holes. And cooling by vaporization heat is performed.

Further, two vaporization filters and a dust removal filter are sequentially stacked in the vicinity of the rear surface of the casing. The vaporization filter is made of pine pulp and a solidifying agent, and the corrugated irregularities are inclined forward and downward. And a first corrugated band having a vertically elongated strip shape, and a second corrugated band having a corrugated irregularity formed in a backward and downwardly inclined manner and an entire vertically corrugated strip shape alternately in the left-right direction. A plurality of small holes are formed by the first corrugated band and the second corrugated band, and in the state of use, air is supplied to the small holes while supplying water from the upper side of the vaporizing filter and flowing down. And is cooled by vaporization heat.
The vaporizing filter is sprayed or coated with a paint containing silver ions and / or active stones.

  According to the cold air fan of the present invention, the water vaporization efficiency in the vaporization filter is improved, and the temperature of the air can be reliably lowered. That is, the air can be brought into contact with the surface of the vaporization filter and a large number of small holes, and the water can be efficiently vaporized over a wide area, whereby a cooling effect can be reliably obtained. As a result, the temperature of the supplied air can be lowered by 3 ° C. to 5 ° C., the use of the cooler can be avoided, and the amount of power used can be reduced.

It is the simplified side sectional view showing the use condition of the 1 embodiment of the present invention. It is the principal part perspective view which showed the vaporization filter. It is the top view which showed the dust removal filter. It is a disassembled perspective view which shows a 1st waveform strip and a 2nd waveform strip It is the principal part perspective view which showed the other vaporization filter. FIG. 3 is an enlarged view of a main part of FIG. 2 and a perspective view for explaining an operation. FIG. 6 is an enlarged view of a main part of FIG. 5 and a perspective view for explaining an operation.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIG. 1, the cold air fan of the present invention includes the blower fan 4 inside the casing 10, the air outlet 8 is provided on the front surface 10 </ b> A of the casing 10, and the air inlet 9 is provided on the rear surface 10 </ b> B of the casing 10. Is provided.
Two vaporization filters 2 and 2 and a dust removal filter 3 are sequentially stacked in the vicinity of the suction port 9 on the rear surface 10B of the casing 10. Further, a water storage tank 5 is provided below the vaporization filters 2 and 2. Furthermore, the pump 10 that pumps water from the tank 5, the water supply basin 15 that supplies water by dropping from above the vaporization filters 2 and 2, and the water discharged from the pump 6 are sent to the casing 10. A pipe 7 is provided.

As shown in FIG. 2 and FIG. 4, the vaporization filter 2 has a corrugated irregularity formed in a forward and downward inclined manner, and a first corrugated concave and convex portion having a vertically elongated strip shape and a corrugated irregularity in a backward downwardly inclined shape. And the second corrugated strips 12 that are formed in the form of vertically elongated strips are alternately stacked in the left-right direction.
The first corrugated band 11 and the second corrugated band 12 are made of pine pulp, which is wood fiber taken out from the pine, and a solidifying agent that bonds and integrates the pine pulp. The pine as a raw material may be any kind such as red pine, black pine, goyo pine, etc., and may be Chinese pine. Even if the pine pulp contains water and does not swell, the rigidity of the first corrugated band 11 and the second corrugated band 12 is reduced even when the vaporizing filter 2 gets wet with water under use conditions. No, the vaporization filter 2 can maintain its shape. In addition, there is an advantage that bacteria and mold are less likely to occur.
The first corrugated band 11 and the second corrugated band 12 are overlapped and bonded so that the corrugated irregularities come into contact with each other at a plurality of bonding points 20.

In FIG. 2, a large number of small holes 13 are formed in the vaporization filter 2 by the first corrugated band 11 and the second corrugated band 12.
The vaporization filter 2 cannot be seen through the small hole 13 in the front-rear direction when viewed from the front horizontal direction. However, when the vaporization filter 2 is looked down diagonally from the front, half of the area of the small hole 13 appears to be in communication, and when the vaporization filter 2 is looked up from diagonally below, the other half of the area of the small hole 13 is Looks like they are communicating. This is because each of the small holes 13 is formed by a concave surface having a forward downward wave shape and a concave surface having a backward downward wave shape, and more specifically, the small hole 13 is formed by a concave surface having a downward downward inclination. And the rear downward inclined wave-shaped concave surface face each other, and the small holes 13 are formed in a complicated manner by branching or merging inside. With this configuration, when the vaporization filter 2 is blown from the front and rear horizontal directions, the air cannot pass straight through the small holes 13 and collides with the corrugated uneven surfaces of the first corrugated band 11 and the second corrugated band 12. It passes as turbulent flow. That is, when water is supplied to the vaporization filter 2 under use and water collides with the corrugated uneven surfaces of the first corrugated belt body 11 and the second corrugated belt body 12 with water adhering to the surface, the water becomes efficient. It evaporates (vaporizes) well, and the vaporization filter 2 efficiently cools the water with the heat of vaporization.

The vaporizing filter 2 is sprayed or coated with a paint containing silver ions and / or active stones.
The vaporization filter 2 is formed by alternately laminating and bonding the first corrugated strips 11 and the second corrugated strips 12, and then spraying or applying a paint containing silver ions and active stones to form surfaces and small holes. 13 is coated. In addition, it is also preferable to mix EM powder and an ion ore in a coating material.
Silver ions have a deodorizing and antibacterial action and prevent mold and other fungi and bacteria from adhering to the surface of the vaporization filter 2. The active stone is composed of natural rocks (minerals) such as quartz porphyry, granite, barleystone, tourmaline (tourmaline), andesite, rhyolite, mudstone, sandstone, etc. Has been. The active stone generates negative air components by negatively ionizing water in the air by ion exchange. The vaporization filter 2 has a large area in contact with air, and silver ions and active stones mixed in the paint sufficiently exert their deodorizing / antibacterial action and ion exchange action.
In addition, EM powder consists of ceramic powder. In addition, ionic ores are specifically called horn health, horn health yayoi, and metamorphic rocks, and contain silicon dioxide, aluminum oxide, titania, iron oxide, calcium oxide, magnesium oxide, sodium oxide, oxidation Contains potassium, etc. and is mixed in the paint in powder form.

  As shown in FIG. 3, the dust removal filter 3 is composed of a pleated filter bent at a plurality of points along a vertical folding line 18, and removes fine dust, virus splashes, pollen and PM2.5 from the passing air. Remove and clean the air. When the dust removal filter 3 is deployed in a planar shape, the length dimension L in the left-right direction is tripled and the ventilation area is large, so the ventilation resistance is small and the wind passes smoothly. Accordingly, the dust removal filter 3 cleans the air at a position behind the vaporization filter 2, but does not hinder the smooth flow of air and does not hinder vaporization heat cooling of the vaporization filter 2. That is, the dust removal filter 3 does not reduce the vaporization efficiency of the vaporization filter 2 and does not apply an excessive load to the motor M that drives the blower fan 4.

As shown in FIG. 1, the blower fan 4 is constituted by a water turbine type fan that is driven by a motor M and rotates around a vertical axis, and has a central shaft portion 4A and a plurality of blade piece portions 4B and 4B. Yes. Note that the blower fan 4 may be a propeller fan that rotates around a horizontal axis.
The tank 5 can be inserted from the lower rear side of the casing 10, and the water stored in the tank 5 is pumped up by the pump 6 and the pipe 7 and supplied from above the vaporization filters 2 and 2.
The blower fan 4 and the tank 5 are made of a resin mixed with silver ions and active stones, suppress the occurrence of mold on the blower fan 4 and the tank 5 by deodorizing and antibacterial action of silver ions, Air purifying components (negative ions) are generated in the water supplied to the vaporization filter 2 and the wind sent by the blower fan 4 by the ion exchange action. In addition, it is also preferable to mix EM powder and an ion ore in the ventilation fan 4 and the tank 5. FIG.

In FIG. 1, a water supply trough portion 15 is provided on the upper surface 10 </ b> C of the casing 10. The water supply trough portion 15 may be formed as a separate member from the casing 10 or may be provided as a suspended part inside the casing 10. The water supply trough 15 is disposed above the vaporization filters 2 and 2, and can supply (drop) water to the vaporization filters 2 and 2. The water supplied from the water supply tank 15 flows down the vaporization filters 2 and 2, is then stored in the tank 5, is pumped up by the pump 6 and the pipe 7, and is repeatedly supplied from above the vaporization filters 2 and 2.
The outer surface of the casing 10 is sprayed or coated with a photocatalyst such as titanium oxide after painting. By coating the outer surface of the casing 10 with the photocatalyst, the outer surface of the casing 10 is less likely to become dirty, and a beautiful appearance is maintained for a long time.

  Further, a negative ion generating electrode 25 for negatively ionizing the wind sent in the direction of arrow C by the blower fan 4 is disposed at the air outlet 8 of the casing 10. The negative ion generating electrode 25 has an upright piece 26 erected by bending an intermediate portion of a conductive metal strip into an L-shaped cross section, and the upright piece 26 has triangular peaks and valleys. It is formed in a saw blade shape that is alternately formed in the left-right direction. Both ends of the negative ion generating electrode 25 have flat connection portions, and the connection portions are electrically connected to a power supply device (not shown). The power supply device configures an electric circuit so that the supply of current to the negative ion generating electrode 25 is switched ON / OFF in response to the ON / OFF of the motor M that drives the blower fan 4. The power supply device is turned on in conjunction with the motor M, and applies a negative DC voltage (for example, minus 4000 V to minus 7000 V) to the negative ion generating electrode 25. By applying a voltage to the negative ion generating electrode 25, the air (wind C) passing through the vicinity of the electrode 25 is negatively ionized. Note that the negative ion generating electrode 25 is housed in a semicircular dome-shaped protective cover 27 in a side view and prevents a human hand from directly touching the negative ion generating electrode 25.

Further, an active stone body 30 for negatively ionizing the wind C is disposed at the outlet 8 of the casing 10.
The active stone body 30 is formed by spherically molding natural rock (mineral) powder containing silicon dioxide and alumina as main components and various kinds of metal oxides such as titanium dioxide as trace components. Specifically, powder obtained by pulverizing natural rock is mixed with water-soluble cellulose powder, then water is added and mixed, and the resulting mud is 2 mm to 10 mm in diameter, more preferably 2 mm to 5 mm. A so-called ceramic ball which is formed into a spherical shape (sphere), dried and then sintered is desirable. Alternatively, the natural rock powder may be formed into a spherical shape by being fixed in a film shape on the surface of a sphere having a diameter of 2 mm to 10 mm made of synthetic resin or a foam thereof, and may be formed into a ceramic ball. Examples of natural rocks (minerals) include quartz porphyry, granite, barleystone, tourmaline (tourmaline), andesite, rhyolite, mudstone, sandstone, and the like, and have the ability to negatively ionize air by ion exchange. Further, it may have far-infrared radiation, antibacterial / deodorant (deodorization) property, and weak magnetic field forming ability.
A plurality of rectifying plates 19 for adjusting the flow of the wind C are provided at the outlet 8 of the casing 10, and a resin attachment member 35 for holding a plurality of active stone bodies 30 is attached to the rectifying plates 19. Yes. The attachment member 35 includes a holding portion 31 that holds a plurality of active stone bodies 30 in a horizontal row and a clip portion 32 that sandwiches the rectifying plate 19. At the air outlet 8 of the casing 10, attachment members 35 are arranged at seven locations. When the wind C passes through the vicinity of the active stone body 30 in the use state, the air is negatively ionized.

  A large amount of negative ions is discharged from the outlet 8 of the casing 10 by lowering the temperature in the room and sending the wind C by the blower fan 4 while supplying water to the vaporization filters 2 and 2 from above. Is done. Negative ions reach every corner of the room, and at the same time as the room is cooled, the air is purified. Negative ions deodorize odors such as toilet odor, cigarette odor, pet odor, body odor, and mold odor. In addition, we will create a healthy indoor environment by removing nicotine tar and harmful substances such as tobacco, removing bacteria, and inactivating viruses. It can also be used to sterilize (antibacterial) and deodorize (deodorize) indoor curtains and laundry. In addition, the negative ions can relieve the indoor air to the fresh air near rivers and waterfalls and provide a relaxing effect.

The use method (action) of the above-described cold air fan of the present invention will be described.
As shown in FIG. 1, in use, water is supplied from above the vaporization filters 2 and 2 to flow down, and air is sent in the direction of arrow C by the blower fan 4. The dust removal filter 3 removes fine dust, virus splashes, and the like behind the vaporization filters 2 and 2 and cleans the air sucked from the suction port 9. In the vaporization filter 2, water supplied from above flows along the surface (front surface / rear surface) and the internal small hole 13, and at the same time, the air is passed through the small hole 13, so that the surface of the vaporization filter 2 ( Water is vaporized in the front and rear surfaces) and the small holes 13, and cooling is performed by heat of vaporization of water. Since the vaporization filter 2 is formed of pine pulp, the vaporization filter 2 is not swollen even when wet, and the rigidity and shape of the vaporization filter 2 are maintained. In addition, mold and bacteria are less likely to occur. Further, since the vaporization filter 2 causes water to adhere to a wide area of the front surface / rear surface and the small hole 13 and generates turbulent air flow in the small hole 13 to efficiently vaporize the water, the conventional vaporization filter is used. Compared to the above, the vaporization efficiency is improved and a large cooling effect can be expected.

FIG. 6 is an enlarged view of the main part of FIG. 2, and the flow of water is indicated by arrows F ₁ and B ₁ . Flow F ₁ of water occurs stoma 13F of the rear lower傾状indicate the flow of (from the front) to the rear, also flows B ₁ of water occurs stoma 13B of front lower傾状(from behind ) Shows forward flow. Since the small hole group of the small holes 13F inclined downward and the small hole group of the small holes 13B inclined downward are formed alternately, the backward flow F ₁ is the first corrugated band 11. As shown in FIG. 6, the rear edge of the second corrugated band 12 smoothly wraps around, and the flow of the entire water flows from the arrow F ₀ to B ₀ , and on the front and rear surfaces of the vaporization filter 2. As it arrives alternately, it flows down in a zigzag shape (as viewed from the side). (Note that the flow of water on the front surface of the vaporization filter 2 appears in the same manner as the flow on the rear surface of FIG. 6 and is not shown).
As described with reference to FIG. 6, the flow of water alternately flows down the small holes 13 </ b> B that are inclined forward and the small holes 13 </ b> F that are inclined downward, and the water flow distance becomes extremely long, and , It flows down in a complicated manner, adheres substantially uniformly to the entire inner surface of the small holes 13F, 13B, and the contact area with the air and the contact time become extremely long. In addition, the cross-sectional area of each small hole 13 is reduced by being reduced at the front and rear intermediate positions, and air turbulence is also generated in the small hole 13, so that the contact between water and air becomes denser and more intense, The water vaporization efficiency can be improved, and the cooling effect can be remarkably improved.

Next, in another embodiment shown in FIG. 5, the vaporization filter 2 includes a triangular corrugated first corrugated first corrugated corrugated concave / convex shape formed in a forward and downward inclined manner, and a triangular corrugated mountain shape. You may laminate | stack the 2nd waveform strip | belt body 12 of the elongate strip | belt shape in which the unevenness | corrugation of the waveform was formed in the back downward inclination alternately by the left-right direction. In this case, a large number of small rectangular holes 13 are formed in the vaporization filter 2 by the first corrugated band 11 and the second corrugated band 12.
FIG. 7 is an enlarged view of the main part of FIG. 5, and the flow of water is indicated by arrows F ₁ and B ₁ . The same reference numerals as those in FIG. 6 described above have the same operation and configuration, and thus redundant description is omitted. However, the small hole group of the rearwardly inclined small holes 13F and the forwardly downwardly inclined small holes 13B are omitted. The small hole groups are alternately formed, and the backward flow F ₁ smoothly moves around the rear edge of the first corrugated belt body 11 and the second corrugated belt body 12 (the water is vertically downward). It flows from arrow F ₀ to B _{0 (} without falling immediately) and flows down in a zigzag shape in side view. (Note that the flow of water on the front surface of the vaporization filter 2 appears in the same manner as in FIG. 7 and is not shown).
Then, the water flow alternately flows down the small holes 13B inclined downward in the front and the small holes 13F inclined downward in the rear to draw a zigzag in a side view, and flows down from the upper end to the lower end of the vaporization filter 2. The distance becomes very long, and it flows down in a complicated manner, adheres almost evenly to the entire inner surface of the small holes 13F and 13B (no dry portion is formed), and the contact area with air and the contact time become extremely long. . Furthermore, the cross-sectional area of the small hole 13 is changed in size, and air turbulence is generated. Further, the contact between water and air is intensely performed, the vaporization efficiency is improved, and the cooling effect can be improved.

  As described above, the cold air fan according to the present invention is a cold air fan in which the vaporization filter 2 is disposed in the vicinity of the rear surface 10B of the casing 10, and the vaporization filter 2 is composed of pine pulp and a solidifying agent. The first corrugated band 11 is formed with an upward and downward slanted shape, and the whole is vertically elongated strip-shaped, and the second corrugated band 12 is formed with a corrugated unevenness and is tilted backward and downwardly, with the entire shape being vertically elongated. Are alternately stacked in the left-right direction, and a plurality of small holes 13 are formed by the first corrugated belt body 11 and the second corrugated belt body 12, and water is supplied from above the vaporization filter 2 in use. The air is allowed to pass through the small holes 13 while flowing down and cooling is performed by the heat of vaporization, so that the vaporization efficiency of water in the vaporization filter 2 is improved and the temperature of the air can be reliably reduced. it can. That is, the air can be brought into contact with the front and rear surfaces of the vaporization filter 2 and the numerous small holes 13 to efficiently vaporize water over a wide area, whereby a cooling effect can be reliably obtained. As a result, the temperature of the supplied air can be lowered by 3 ° C. to 5 ° C., the use of the cooler can be avoided, and the amount of power used can be reduced.

  In addition, two vaporization filters 2 and 2 and a dust removal filter 3 are sequentially stacked in the vicinity of the rear surface 10B of the casing 10, and the vaporization filters 2 and 2 are made of pine pulp and a solidifying agent, A first corrugated body 11 having a corrugated unevenness formed in a forward and downward inclined manner and an overall vertically elongated strip shape, and a second corrugated portion having an corrugated unevenness formed in a downwardly tilted backward shape and an entire vertically elongated strip shape. The body 12 is alternately laminated in the left-right direction, and a plurality of small holes 13 are formed by the first corrugated belt body 11 and the second corrugated belt body 12, and from above the vaporizing filters 2, 2 in the usage state The structure is such that air is passed through the small holes 13 while cooling down by supplying water, and cooling by vaporization heat is performed, so that the vaporization efficiency of the water in the vaporization filter 2 is improved, and the temperature of the air is ensured. Can be reduced. That is, the air can be brought into contact with the front and rear surfaces of the vaporization filter 2 and the numerous small holes 13 to efficiently vaporize water over a wide area, whereby a cooling effect can be reliably obtained. The two vaporization filters 2 and 2 can reliably cool the passing air, and as a result, the temperature of the supplied air can be lowered by 3 ° C to 5 ° C. it can. Furthermore, the dust removal filter 3 can remove minute dust, virus splashes, pollen and PM2.5, and can clean the air.

  In addition, since the paint containing silver ions and / or active stones is sprayed or applied to the vaporization filter 2, the generation of mold on the vaporization filter 2 is suppressed and the vaporization filter 2 is passed. Negative ions can be generated in the air.

2 Vaporization filter 3 Dust removal filter 10 Casing 10B Rear surface 11 First corrugated belt 12 Second corrugated belt 13 Small hole

The cold air fan according to the present invention is a cold air fan in which a vaporization filter is disposed in the vicinity of the rear surface of the casing. The vaporization filter is made of pine pulp and a solidifying agent, and corrugated irregularities are formed in a downwardly inclined manner. In addition, first corrugated strips having a vertically elongated strip shape, and second corrugated strips having corrugated irregularities formed in a backward and downwardly inclined manner and the entire vertically striped strip shape are alternately stacked in the left-right direction. The first corrugated band and the second corrugated band alternately form a small hole group of small holes inclined downward and a small hole group of small holes inclined downward in the front direction. In the state of use, water is supplied from above the vaporization filter, and the water is guided to flow alternately through the small holes inclined downward and the small holes inclined downwardly. Flow down in a zigzag manner to attach water to the entire inner surface of the small hole, and behind the vaporization filter Suction air to Luo forward, by passing air into the small hole, to the water attached to the inner surface of the small holes while generating the turbulent flow of the air in the small hole is brought into contact with air, cooling by heat of vaporization It is comprised so that it may perform.

Further, two vaporization filters and a dust removal filter are sequentially stacked in the vicinity of the rear surface of the casing. The vaporization filter is made of pine pulp and a solidifying agent, and the corrugated irregularities are inclined forward and downward. And a first corrugated band having a vertically elongated strip shape, and a second corrugated band having a corrugated irregularity formed in a backward and downwardly inclined manner and an entire vertically corrugated strip shape alternately in the left-right direction. By stacking the first corrugated belt body and the second corrugated belt body , a small hole group of small holes inclined downward and a small hole group of small holes inclined downward in the front are alternately arranged in the left-right direction. In the use state, water is supplied from above the vaporization filter, and the water is guided so as to alternately flow through the small holes inclined forward and the small holes inclined downward. In a zigzag shape as viewed from the side, allowing water to adhere to the entire inner surface of the small hole, and Draws air from the rear of the filter forward, by passing air into the small hole, to the water attached to the inner surface of the small holes while generating the turbulent flow of the air in the small hole is brought into contact with air, vaporized It is configured to perform cooling by heat.
The aforementioned vaporization filter, silver ions, and / or, in which paint containing active stones are coated fabric.

2 Evaporation filter 3 Dust removal filter 10 Casing 10B Rear surface 11 First corrugated belt 12 Second corrugated belt 13 B Small hole
13F small hole

Claims (3)

In the cold air fan in which the vaporizing filter (2) is disposed in the vicinity of the rear surface (10B) of the casing (10),
The vaporization filter (2) is composed of pine pulp and a solidifying agent, and the corrugated irregularities are formed in a forward and downward inclined shape, and the entire corrugated irregularities are formed as a first corrugated first strip (11) having a vertically elongated strip shape. The first corrugated band (11) and the second corrugated band are formed by alternately laminating the second corrugated band (12), which is formed in a backward and downwardly inclined manner and has a vertically elongated strip shape as a whole. A number of small holes (13) are formed by (12),
It is characterized in that, in use, water is supplied from above the vaporization filter (2) and allowed to flow down while allowing air to pass through the small hole (13) and cooling by vaporization heat. A cold air fan. Two vaporization filters (2), (2), and a dust removal filter (3) are sequentially stacked in the vicinity of the rear surface (10B) of the casing (10),
The vaporization filters (2) and (2) are made of pine pulp and a solidifying agent, and the corrugated irregularities are formed in a forward and downward inclined shape, and the first corrugated band (11) having a vertically elongated strip shape as a whole. And the second corrugated strips (12), which are vertically elongated strips as a whole, are alternately stacked in the left-right direction, and the first corrugated strip (11) and the second corrugated strips are stacked. A number of small holes (13) are formed by the corrugated band (12),
In use, water was supplied from above the vaporization filters (2) and (2) while allowing the air to pass through the small holes (13) and cooling by vaporization heat. A cold air fan characterized by   The cold air fan according to claim 1 or 2, wherein the vaporizing filter (2) is sprayed or coated with a paint containing silver ions and / or active stones.

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