JP2005274075A - Air cooling device and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cooling method for saving space and energy while reducing pressure drop. <P>SOLUTION: This air cooling device comprises a cooling unit having an approximately rectangular parallelepiped oblique honeycomb formed with a plurality of corrugated plates laminated and stored in a case having opening portions in only two opposed faces, the opening portions in the two opposed faces being arranged as an upper face opening portion and a lower face opening portion in a vertical duct in an approximately horizontal direction, a cooling water supply means, a water receiving part, and a blowing means. The oblique honeycomb has a flushing cut portion formed in the lower end opening of each cell cavity portion or a flushing pin attached to the lower end of each cell cavity portion. In the cooling unit, the height between both upper and lower faces of the oblique honeycomb is 100-600mm and the oblique angle of each cell is 30-80°. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air cooling device and an air cooling method for efficiently cooling high-temperature air such as in summer. More specifically, the present invention relates to an air cooling device and an air cooling method for air in office buildings, hospitals, and production factories.

  Currently, energy used for air conditioning in office buildings and factories accounts for over 30% of Japan's energy consumption, and its reduction is an urgent issue. Conventionally, the circulating air and intake air in office buildings and factories have been cooled by sending air to a fin coil heat exchanger in which a refrigerant or cooling water is passed and passing through the fin coil. However, since the fin coil heat exchanger requires a large amount of cooling water relative to the amount of air to be cooled, that is, the liquid-gas ratio is large, a large amount of electric power is required to operate the cooling water circulation pump and the like. Necessary, the pressure loss is large, and if water droplets adhere to the fin coil, the water droplets greatly impede heat conduction, resulting in a significant reduction in thermal efficiency. In addition, although the method of blowing off with a blower etc. can also be considered as a method of removing the adhering water droplet, since installation space and electric power, such as a blower, are needed, it is not preferable from a viewpoint of space efficiency or power saving.

  Accordingly, an air cooling system in which a skewed honeycomb is used as a gas-liquid contact means, and a cooling unit in which the skewed honeycomb is housed in a case is disposed substantially horizontally in a vertical duct or in a vertical portion of an L-shaped duct bent upward. Equipment is being considered. As a method for cooling the air using the apparatus, for example, air is supplied to the skewed honeycomb from the lower method of the cooling unit, and water is allowed to flow down from above the cooling unit to the skewed honeycomb. May be brought into contact with each other so as to form a counterflow. Note that the skew honeycomb is obtained by laminating a plurality of corrugated plates alternately and obliquely crossing, and the outer shape is generally a rectangular parallelepiped from the viewpoint of ease of manufacture, ease of handling, etc. Things are used. For this reason, in the above-described air cooling device, the end face of the skewed honeycomb in the cooling unit usually has a substantially flat outer shape including the end face on the lower surface opening side. Since the above air cooling device uses a skewed honeycomb having excellent gas-liquid contact efficiency, cooling air using this device has high cooling performance, good thermal efficiency, low liquid-gas ratio, and relatively low pressure loss. Space saving and energy saving can be achieved, and the cost can be reduced.

  However, when cooling the air using the air cooling device, if the cell size of the skewed honeycomb is reduced to improve the cooling efficiency, or the amount of water flowing down is increased to lower the cooling temperature, A hemispherical water film that closes the entire opening of the cell is likely to be generated in a part of the cell on the end surface on the lower surface opening side of the skewed honeycomb, and this tends to hinder cell ventilation and water flow. For this reason, the air cooling device has a problem that the pressure loss tends to increase excessively depending on the conditions such as the cell size of the skewed honeycomb and the amount of water.

  Accordingly, it is an object of the present invention to provide an air cooling device and an air cooling method that have low pressure loss, can save space and energy, and are low in cost.

  In this situation, the inventor has conducted intensive studies, and as a result, a cooling unit housed in a case having openings on two opposite surfaces of a skewed honeycomb is bent in a vertical duct or upward. In which the draining cut portion is formed at the lower end opening of each cellular cavity, or at the lower end opening of each cellular cavity. If an air cooling device in which the thickness between the upper and lower surfaces of the skewed honeycomb and the skew angle of each cell are within a specific range is used as the cooling unit, the pressure loss is small. It has been found that it is space-saving and energy-saving, and the present invention has been completed.

  That is, the present invention (1) opposes a slanted honeycomb having a substantially rectangular parallelepiped appearance having a cellular cavity formed by laminating a plurality of corrugated sheets and formed in a gap between the laminated corrugated sheets. It is housed in a case having openings on only two surfaces, and the two openings facing each other are used as upper surface openings and lower surface openings, and the upper surface openings and the lower surface openings flow in the duct. A cooling unit that is arranged not to be parallel to the cooling unit, a cooling water supply means that is attached above the upper surface opening of the cooling unit and supplies cooling water to the upper surface opening, and below the lower surface opening of the cooling unit An air cooling device having a water receiving portion for collecting discharged water discharged from the lower surface opening of the cooling unit, and an air blowing means for supplying air to the lower surface opening of the cooling unit. Row honeycomb, each cell shape A draining cut portion is formed at the lower end opening of the cave, or a draining pin is attached to the lower end opening of each cellular cavity, and the cooling unit is the cellular cavity The air cooling apparatus is characterized in that the cell direction, which is the length direction of each, is arranged so as to be inclined with respect to the surface formed by the two openings facing each other.

  Further, the present invention (2) is the air cooling device according to the present invention (1), wherein the draining cut portion is obtained by cutting a corner of a peak portion or a valley portion of a cell forming a lower end opening. Is to provide.

  Further, the present invention (3) is the present invention (2) wherein the cell direction of a part of the cell-shaped cavities in the cell direction is the first to the surface formed by the two opposing openings. The air cooling device is characterized in that it intersects at an angle of 1 and the cell direction of the remaining cellular cavity intersects at a second angle with respect to the surface to be formed.

  In the present invention (4), in the present invention (3), the first angle has an angle of 30 to 80 ° with respect to the air introduction direction, and the second angle is 150 with respect to the air introduction direction. An air cooling device having an angle of ˜100 ° is provided.

  In the present invention (5), a slanted honeycomb having a substantially rectangular parallelepiped appearance formed by laminating a plurality of corrugated plates is housed in a case having openings on only two opposed surfaces, and the opposed A cooling unit disposed substantially horizontally in a vertical duct with two openings as an upper surface opening and a lower surface opening, and cooling water is provided above the upper surface opening of the cooling unit and supplied to the upper surface opening. Cooling water supply means, a water receiving part attached below the lower surface opening of the cooling unit for collecting discharged water discharged from the lower surface opening of the cooling unit, and supplying air to the lower surface opening of the cooling unit An air cooling device having a blowing means for performing the above operation, wherein the skewed honeycomb is formed by forming a draining cut portion at a lower end opening of each cellular cavity, or a lower end opening of each cellular cavity. With drainage pins attached to the part And the cooling unit provides an air cooling device in which the thickness between the upper and lower surfaces of the skewed honeycomb is 100 to 600 mm, and the skew angle of each cell is 30 to 80 °. .

  Moreover, this invention (6) provides the air cooling device characterized by the said draining cut part cutting the corner | angular part or trough part of the cell which forms a lower end opening. .

  In the present invention (7), a slanted honeycomb having a substantially rectangular parallelepiped appearance formed by laminating a plurality of corrugated plates is housed in a case having openings on only two opposed surfaces, and the opposed A cooling unit disposed substantially horizontally in a vertical portion of an L-shaped duct bent upward with two openings as an upper surface opening and a lower surface opening, and the upper surface opening provided above the upper surface opening of the cooling unit A cooling water supply means for supplying cooling water to the part, a water receiving part attached to the elbow bottom of the L-shaped duct for collecting discharged water discharged from the lower surface opening of the cooling unit, and a lower surface opening of the cooling unit An air cooling device having air blowing means for supplying air to the part, wherein the skewed honeycomb is formed by forming a draining cut portion at a lower end opening of each cellular cavity, or each cellular A draining pipe is inserted in the lower end opening of the cavity. The cooling unit comprises an air cooling device characterized in that the thickness between the upper and lower surfaces of the skewed honeycomb is 100 to 600 mm, and the skew angle of each cell is 30 to 80 °. It is to provide.

  Further, the present invention (8) is the air cooling according to the present invention (7), wherein the draining cut portion is obtained by cutting a corner of a peak portion or a valley portion of a cell forming a lower end opening. A device is provided.

  The present invention (9) is characterized in that, in the present invention (1) to (5), the water receiving section and the cooling water supply means are connected via a drain water cooling means and a circulation pump. An air cooling device is provided.

  Further, the present invention (10) is the present invention (1) to (6), wherein the corrugated sheet is at least one filler or binder selected from the group consisting of alumina, silica and titania, and glass fiber. The present invention provides an air cooling device comprising ceramic fibers or alumina fibers.

  The present invention (11) provides the air cooling device according to any of the present inventions (1) to (7), wherein the corrugated sheet has a porosity of 50 to 80%.

  The present invention (12) provides the air cooling device according to any of the present inventions (1) to (11), wherein the skew honeycomb has a cell height of 3.0 to 9.0 mm. Is.

  Further, the present invention (13) is characterized in that, in the present inventions (1) to (12), a skewed honeycomb similar to the skewed honeycomb is separately installed above the cooling unit and used as a demister. A cooling device is provided.

  Further, the present invention (14) uses the air cooling device according to any one of the present inventions (1) to (4), introduces air into the lower surface opening of the cooling unit and discharges it from the upper surface opening, An air cooling method is characterized in that cooling water is supplied to the upper surface opening of the cooling unit and discharged from the lower surface opening.

  Further, the present invention (15) uses the air cooling device according to the present invention (5), introduces air into the lower surface opening of the cooling unit and discharges it from the upper surface opening, and supplies cooling water to the cooling unit. An air cooling method for supplying to the upper surface opening and discharging from the lower surface opening is provided.

  Further, the present invention (16) uses the air cooling device according to the present invention (7), introduces air from the horizontal portion of the L-shaped duct to the lower surface opening of the cooling unit and discharges it from the upper surface opening. An air cooling method is provided in which cooling water is supplied from the vertical part of the L-shaped duct to the upper surface opening of the cooling unit and discharged from the lower surface opening.

  Also, in the present invention (17), in the present invention (15) or (16), the liquid gas ratio between the supply weight of the cooling water supplied to the cooling unit and the supply weight of the air supplied to the cooling unit is 0. An air cooling method characterized by being 3 to 1.5 is provided.

  In the air cooling device according to the present invention, the slanted honeycomb is formed with a draining cut portion at the lower end opening of each cellular cavity, or the draining pin is attached to the lower end opening of each cellular cavity. Therefore, when air is cooled using the air cooling device, a hemispherical water film that covers the entire surface of the cell is generated in the cell on the end face on the lower surface opening side of the skewed honeycomb. It can be avoided or significantly suppressed. For this reason, for example, with respect to the intake air and circulating air of office buildings and factories, the simple configuration of the slanted honeycomb can reduce pressure loss, save space and energy, and further reduce the cost.

  First, a first embodiment of an air cooling device according to the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram of a first embodiment of an air cooling device. In FIG. 1, 1a is an air cooling device, 2 is a cooling unit, 5 is a water dispersion device (cooling water supply means), and 6 is a water receiving pan (water receiving portion). Moreover, the air cooling device 1a is provided with the ventilation means which is not illustrated other than the above.

  The cooling unit is formed by housing a skewed honeycomb in a case. The skew honeycomb will be described with reference to FIGS. 2, 8, 9, and 10. FIG. 2 is a schematic diagram illustrating the skewed honeycomb 3, and FIGS. 8 and 9 are schematic diagrams illustrating a draining cut portion on the end surface of the skewed honeycomb 3 on the side of the lower surface opening 104. FIG. 4 is a schematic diagram for explaining a draining pin on an end surface of the skewed honeycomb 3 on the lower surface opening 104 side. The oblique honeycomb 3 is a honeycomb body having an outer shape formed by stacking a plurality of corrugated plates 20 and having a substantially rectangular parallelepiped shape. The corrugated plate 20 includes two types of first corrugated plate 27 and second corrugated plate 28 adjacent to the first corrugated plate 27, and a gap in which the first corrugated plate 27 and the second corrugated plate 28 are alternately stacked. A cellular cavity is formed. Since the cellular cavity is partitioned by the corrugated plate 20, it is substantially impossible to vent in the laminating direction of the corrugated plate 20, but air can be vented in the direction perpendicular to the laminating direction. Yes. The first corrugated plate 27 and the second corrugated plate 28 may be stacked with different lengths in the direction of the upper surface opening 101 to the lower surface opening 104, thereby closing the entire surface of the cell. The generation of a hemispherical water film can be further suppressed.

  In the skewed honeycomb 3, the depth direction (hereinafter also referred to as “cell direction”) 40 of the cells that can be ventilated continuously formed by the crests of the corrugated sheet 20 is the cell of the first corrugated sheet 27 (hereinafter, The cell direction (hereinafter also referred to as “first cell direction”) 47 of “37” (also referred to as “first cell”) is substantially the same in common with each first corrugated plate 27, and the second corrugated plate 28. The cell direction (hereinafter, also referred to as “second cell direction”) 48 of the cells (hereinafter also referred to as “second cells”) 48 formed in the same manner is common to the second corrugated plates 28. It is. That is, in the present invention, in the oblique honeycomb 3, all the first cells 37 are directed in the substantially same direction 47, all the second cells 38 are directed in the substantially same direction 48, and the first cell direction 47 and the second cell A honeycomb-like body intersecting with the cell direction 48 at a predetermined angle. In the present invention, the cell direction of the first cell 37 and the cell direction of the second cell 38 do not have to be substantially the same as described above as long as they are within a range that can be established as a corrugated plate, and are slightly shifted. It may be.

  Further, in the skewed honeycomb 3, the four surfaces 101 to 104 other than the side surfaces parallel to the corrugated plate 20 are cell openings, and the two surfaces 105 and 106 parallel to the corrugated plate 20 are the end corrugated plates 23 and 23. The outer shape closed by is a substantially rectangular parallelepiped shape. In the present invention, the cell opening means a surface in the skewed honeycomb 3 where both the cross section of the first cell 37 and the cross section of the second cell 38 open. That is, the surface in which only the cross section of either the first cell 37 or the second cell 38 exists as a result of being cut by a plane parallel to the first cell 37 or the second cell 38 is not a cell opening, What is formed in this way does not correspond to the skewed honeycomb 3.

  As shown in FIG. 8, the end surface on the lower surface opening 104 side of the skewed honeycomb 3 is formed on the lower end cell opening 691 of each of the cellular cavities of the first corrugated plate 27 and the second corrugated plate 28. Is formed. FIG. 8 shows a state in which the draining cut portions 65 formed at the corners of the ridges of the cells of the left cell openings 69a to 69c are cut out in order to make the draining cut portions 65 easy to understand. The draining cut portion 65 on the opening surface is hatched so that it can be compared with the original shape. That is, in the draining cut portion 65 according to the present invention, notches similar to those formed in the cell openings 69a to 69c are formed in the openings of all cells. Note that the position of forming the draining cut portion 65 is not particularly limited as long as it is a part of the opening portion of the cell, and the opening portion of the cell is formed as shown in FIG. Of the two corrugated sheets, the one formed on one corrugated sheet (first corrugated sheet 27 in FIG. 9) (one-side cut form) may be used. Moreover, it is not limited to the corner | angular part of a cell opening part, In the figure, the ridgeline part (straight line part) which connects a peak part and a trough part may be sufficient.

  Further, instead of forming the draining cut portion on the end surface of the oblique honeycomb 3 on the lower surface opening 104 side, as shown in FIG. 10, each cellular shape of the first corrugated plate 27 and the second corrugated plate 28 is formed. A drainage pin 68 may be attached to the lower end cell opening 691 of the hollow portion. The draining pin 68 is a so-called nail or water pin, and includes a pin main body 67 and a pin head 66 formed at one end of the pin main body 67. The attachment position of the draining pin 68 is not particularly limited as long as the pin main body 67 penetrates the cell opening surface 69 (position that breaks the water film formed on the cell opening surface 69). In this way, the valley 271 of the cell opening is mentioned. If it is such a position, when the lower surface opening surface 104 on the front in the drawing faces downward, the pin main body 67 slightly inclines downward due to gravity and penetrates the cell opening 69. In the present invention, if the draining cut portion 65 is formed in the cell opening, the water film area is reduced, and generation of a hemispherical water film that closes the cell opening can be avoided or greatly suppressed. . Moreover, if the draining pin 68 is formed in the cell opening, it is possible to avoid or greatly suppress the generation of a water film by breaking the hemispherical water film that closes the cell opening surface.

  The height of the cells of the skewed honeycomb 3, that is, the height between the corrugated peaks and valleys is usually 3 to 10 mm, preferably 5 to 7 mm. If the height of the cell is less than 3 mm, it is difficult to manufacture and the pressure loss increases, which is not preferable. If the height of the cell exceeds 10 mm, the cooling efficiency decreases, which is not preferable. Among the cells formed by the corrugated sheet 20 in the skewed honeycomb 3, the interval between the peak portions of adjacent cells, that is, the cell pitch is usually 6 to 16 mm, preferably 7 to 10 mm.

  Further, the skew honeycomb 3 has a thickness between the ventilation directions 43 and 44 when installed as the cooling unit 2 (t in FIG. 4), that is, an opening on the upper surface when the ventilation direction of the cooling unit 2 is both upper and lower sides. The dimension between 43 and the lower surface opening 44 is usually 100 to 600 mm, preferably 200 to 400 mm. When the thickness is less than 100 mm, the cooling efficiency is lowered, which is not preferable. When the thickness exceeds 600 mm, the cooling efficiency is not further improved and the pressure loss is increased.

  In the present invention, when the skewed honeycomb 3 is a small one that does not satisfy the dimensions within the above range, a plurality of the skewed honeycombs 3 may be combined to have a dimension within the above range. . As described above, when the skewed honeycomb 3 is used as the air cooling means, the heat exchange rate per volume is higher than that of the conventionally used fin coil, so that the size of the skewed honeycomb 3 can be reduced. The installation space can be reduced. Furthermore, the circulation amount of water is much smaller than that of the conventional fin coil, and a significant energy saving can be achieved.

  The skew honeycomb 3 is formed by laminating a plurality of corrugated plates 20. It is preferable that the corrugated plate 20 has irregularities on the surface and has a porous inside because the surface area of the element can be increased and the contact area between water and air that permeates and flows down the element increases. Examples of such corrugated sheets include at least one filler or binder selected from the group consisting of alumina, silica and titania, and a fiber substrate such as glass fiber, ceramic fiber or alumina fiber. Is mentioned. Among these, those containing titania are preferable because the removal efficiency of acidic chemical contaminants is improved. Further, the corrugated plate usually contains 60 to 93% by weight of filler or binder and 7 to 40% by weight of fiber base material, preferably 70 to 88% by weight of filler or binder and 12 fiber base material. Contains ~ 30% by weight. It is preferable that the mixing ratio of the corrugated sheet is within the above range because the water permeability and strength of the corrugated sheet are high.

  The corrugated plate 20 can be produced by a known method. For example, a paper made of glass fiber, ceramic fiber or alumina fiber is immersed in a slurry obtained by mixing a binder such as alumina sol and a filler such as alumina hydrate. Then, it can be obtained by drying, corrugating, and then performing drying and heat treatment to remove moisture and organic components. When silica or titania is contained in addition to alumina, for example, the blending amount of silica and titania is usually 5 to 40 parts by weight with respect to 100 parts by weight of alumina. In addition, corrugating includes, for example, a method in which a known corrugator that passes between a plurality of wide gears on the surface of which corrugated irregularities that oscillate in the radial direction are used and a flat plate is passed through the corrugator.

  The corrugated plate 20 has a thickness of usually 200 to 1000 μm, preferably 300 to 800 μm. Moreover, the porosity of a corrugated sheet is 50-50% normally, Preferably it is 60-75%. By setting the porosity within the above range, the corrugated sheet can achieve moderate permeability, and therefore the skewed honeycomb 3 can increase the contact efficiency between air and water. It is preferable that the corrugated plate has the above thickness and porosity because the liquid gas ratio and the water permeation rate are within an appropriate range, the contact efficiency between water and air is increased, and the strength is increased.

  As a method of forming the skewed honeycomb 3 from the corrugated sheet 20, for example, the corrugated sheet 20 is first cut to produce the first corrugated sheet 27 and the second corrugated sheet 28, and then the first corrugated sheet 27 and the first corrugated sheet There is a method in which the two corrugated plates 28 are arranged so as to have an intersecting angle which will be described later, and these are laminated in the case 4 and fixed as a laminated body. It is sufficient that the corrugated sheets are fixed to each other in the laminated body, and the corrugated sheets do not need to be bonded to each other. However, when these are bonded, they may be bonded at a peak portion or a valley portion. Examples of the method of bonding the corrugated plates include a method in which an inorganic adhesive such as alumina sol is bonded to the crests of the corrugated plate 20 and pressed.

  In the first embodiment 1a, the skewed honeycomb as shown in FIG. 8 includes a first corrugated plate 27 and a second corrugated plate 28 in which a draining cut portion 65 is previously formed in a cell opening at the lower end surface. It is preferable from the viewpoint of good production efficiency that the layers are alternately laminated. Further, in the skewed honeycomb as shown in FIG. 9, the first corrugated plate 27 in which the draining cut portion 65 is previously formed in the cell opening portion on the lower end surface, and the draining cut portion is formed on the cell opening surface on the lower end surface. The second corrugated plates 28 that are not formed are alternately stacked. Further, in the skewed honeycomb as shown in FIG. 10, after the first corrugated plate 27 and the second corrugated plate 28 are alternately laminated, a draining pin 68 is attached to the valley portion 271 of the cell opening at the lower end surface. .

  In the present invention, the cooling unit 2 is configured by housing the skewed honeycomb 3 in a case 4 having a predetermined shape. The case used in the present invention has openings on only two opposing surfaces. FIG. 3 shows an example of the case 4 used in the present invention. In FIG. 3, the case 4 is formed such that four surfaces other than the two facing openings 43 and 44 form a frame body 45, and the frame body 45 is formed so that ventilation and water passage are impossible. The shape of the openings 43 and 44 on the two opposing surfaces is not particularly limited as long as the cell openings of the skewed honeycomb 3 to be housed can be vented, and examples thereof include a rectangular shape and a circular shape. . The material of the case 4 is not particularly limited, but is preferably a material that is excellent in durability and has few components eluted into water. Examples of such a material include metals such as SUS and aluminum, and plastics such as vinyl chloride resin.

  FIG. 4 shows a cooling unit 2 in which the skew honeycomb 3 is housed in a case 4. In the cooling unit 2, the skewed honeycomb 3 is accommodated so that the two surfaces 101 and 104 of the cell openings 101 to 104 having four surfaces coincide with the openings 43 and 44 on the two opposite surfaces of the case. That is, the cooling unit 2 has a structure that allows ventilation and cooling water to flow only between the openings 43 and 44 on the two opposing surfaces of the case.

  In the air cooling device 1 a, the cooling unit 2 is disposed substantially horizontally in the vertical duct 70 with the openings 43 and 44 on the two opposite faces of the case 4 as the upper surface opening 43 and the lower surface opening 44. Here, the vertical duct is a duct in which at least the portion where the cooling unit is disposed and the vicinity thereof are extended in the vertical direction, and the air flow direction of the cooled air is substantially vertical before and after passing through the cooling unit. It means a duct with a shape that becomes a direction. Moreover, it is preferable that the cooling unit 2 has no gap between the cooling unit 2 and the inner wall of the vertical duct 70 so that substantially the entire amount of air and cooling water passes through the cooling unit 2.

  When the cooling unit 2 is installed, the oblique honeycomb 3 has an intersecting angle of usually 20 to 120 °, preferably 30 to 80 °. When the crossing angle is within the above range, the skew angle with respect to the entry of the cooled air 11 and the cooling water 15 is likely to be within an appropriate range described later, and the contact efficiency between the cooled air 11 and the cooling water 15, that is, This is preferable because the cooling efficiency of the air to be cooled 11 tends to be high.

  The intersection angle will be described with reference to FIG. FIG. 5 is an enlarged schematic view of the cross section of the cooling unit 2. In FIG. 5, the first cell direction 47 and the second cell direction 48 intersect and form two angles. Of these, when the cooling unit 2 is installed, the first cell direction 47 and the second cell direction 48 open in the direction between the openings 43 and 44, that is, the ventilation direction side. The angle of the other corner (α in FIG. 5) is called the crossing angle.

  In the air cooling device 1a, the skew angle of each cell in the cooling unit 2 when the cooling unit 2 is installed is usually 30 to 80 °, preferably 45 to 70 °. It is preferable that the skew angle is within this range because the contact efficiency between air and water is high and the pressure loss is small. Here, the skew angle is the angle of the smaller one of the two angles formed by the cell direction of each cell in the skewed honeycomb 3 with respect to the horizontal plane when the cooling unit 2 is installed. . For this reason, the skew angle does not exceed 90 °.

The skew angle will be described with reference to FIG. In FIG. 5, the first cell direction 47 forms a skew angle θ ₁ with the horizontal plane (hereinafter, the skew angle of the first corrugated plate 27 is also referred to as “first cell skew angle”). Further, the second cell direction 48 forms a skew angle θ ₂ with the horizontal plane (hereinafter, the skew angle of the first corrugated plate 27 is also referred to as “second cell skew angle”). In the present invention, the skew angle is a concept including both the first cell skew angle θ ₁ and the second cell skew angle θ ₂ , and in the present invention, both θ ₁ and θ ₂ are in the above range of angles. Is in. From FIG. 5, there is a relationship of α + θ ₁ + θ ₂ = 180 °.

  In the air cooling device 1 a, the cooling water supply means 5 that supplies the cooling water 15 to the upper surface opening 43 of the cooling unit 2 is provided above the upper surface opening 43. Although the form of the cooling water supply means 5 is not particularly limited, for example, a normal water supply duct for simply dropping water drops shown in FIG. 1 or a spray nozzle attached to a water supply pipe (not shown) to supply the cooling water 15 to the oblique honeycomb 3. And the like that can be distributed and supplied to the upper surface opening 43. Among these, the thing which attached the spray nozzle to the water supply pipe | tube which can spray a cooling water with a uniform quantity over a wide range is preferable. The cooling water supply means 5 is preferably capable of adjusting the amount of water so that the minimum amount of cooling water is supplied to the skewed honeycomb 3 of the cooling unit 2.

  In the air cooling device 1 a, a water receiving unit 6 that collects the discharged water 16 discharged from the cooling unit 2 is provided below the lower surface opening 44 of the cooling unit 2. Although it does not specifically limit as a form of the water receiving part 6, For example, a water receiving pan etc. are mentioned. Further, the water receiving part 6 may be provided with a discharge pipe 61 for discharging the discharged water 16 to the outside of the water receiving part 6, but the installation of the discharge pipe 61 is not essential. Since the water receiving portion 6 requires substantially the same area as the lower surface opening 44 of the cooling unit 2, it is possible to increase the pressure loss by providing the flat portion on the lower side, for example, the elbow bottom portion 75 of the L-shaped duct 71. It is preferable because it is excellent in suppression of space and space saving.

  The air cooling device 1 a includes a blowing unit that supplies air to the lower surface opening 44 of the cooling unit 2. Although the air blowing means is not shown, the installation location may be either on the lower surface opening 44 side or the upper surface opening 43 side of the cooling unit 2. As a ventilation means, the air blower provided with the fan etc. are mentioned, for example.

  Further, the air cooling device 1a, when the water receiving section 6 and the cooling water supply means 5 are connected via a discharge water cooling means and a circulation pump (not shown), flows down the skewed honeycomb 3 in the cooling unit 2 to be covered. This is preferable in that the discharged water 16 warmed by the cooling air 11 can be reused as the cooling water 15. Examples of the discharged water cooling means include a heat exchanger.

  The air cooling device 1a prepares a skewed honeycomb similar to the skewed honeycomb 3, and separately installs the skewed honeycomb above the upper surface opening 43 of the cooling unit 2 and above the cooling water supply means 5. It is preferable to use the skewed honeycomb as a demister (not shown) because water droplets can be prevented from being scattered from the upper surface opening 43 of the cooling unit 2 and mixed with the cooling air. In addition, it is preferable for the demister to accommodate the slanted honeycomb in the case 4 and have the same form as the cooling unit 2 because water drops can be efficiently removed.

  Next, the operation of the air cooling device 1a will be described with reference to FIG. First, the cooling water 15 flows down from the cooling water supply means 5 to the upper surface opening 43 of the cooling unit 2. At this time, the supply water amount of the cooling water 15 is appropriately adjusted so that the entire skewed honeycomb 3 in the cooling unit 2 is in a wet state. Next, the air to be cooled 11 is introduced from the lower surface opening 44 of the cooling unit 2 in the direction of the arrow in FIG. In the cells in the skewed honeycomb 3 in the cooling unit 2, the cooling water 15 flowing down from the top and the air 11 to be cooled introduced from the bottom to the top are in direct gas-liquid contact in a counterflow contact form. When the air to be cooled 11 is cooled and chemical contaminants or the like are present in the air to be cooled 11, the chemical contaminants or the like are taken into the cooling water 15. The cooling water 15 warmed by heat exchange and possibly taking in chemical pollutants becomes discharged water 16 after flowing down the oblique honeycomb 3 in the cooling unit 2 and falls from the lower surface opening 44 to the water receiving unit 6. To do. At this time, since the end face on the lower surface opening 44 side of the skewed honeycomb 3 is formed in an uneven shape, the discharged water 16 can be smoothly received without generating a water film on the end surface on the lower surface opening 44 side. On the other hand, the air supplied from the lower surface opening 44 side is also smoothly introduced into the skewed honeycomb 3, so that the pressure loss is small. Further, the discharged water 16 in the water receiving section 6 is supplied to a heat exchanger by a circulation pump (not shown) through a drain pipe 61 and cooled to a predetermined temperature, and again passes through a water supply pipe 51 to the cooling water supply means 5. If it is made to supply, since it can be reused as the cooling water 15, it is preferable. On the other hand, the cooled cooling air 12 is obtained from the upper surface opening 43 of the cooling unit 2.

  The air cooling device 1a according to the first embodiment horizontally arranges the cooling unit 2 including the skewed honeycomb 3 in which the air to be cooled 11 and the cooling water 15 are in direct contact, and the cooling unit 2 includes the skewed honeycomb. 3 and the end face on the lower surface opening 44 side of the skewed honeycomb 3 is formed in a concavo-convex shape, so that the pressure loss is small, the cooling performance is high, the thermal efficiency is high, The gas ratio is small, space and energy can be saved, and the cost is low.

  Next, a first embodiment of the air cooling method according to the present invention will be described. The method uses the air cooling device 1 a to introduce the cooled air 11 into the lower surface opening 44 of the cooling unit 2 and discharge it from the upper surface opening 43, and the cooling water 15 to the upper surface opening 43 of the cooling unit 2. This is an air cooling method for supplying and discharging from the lower surface opening 44. The operation and the like are the same as those described for the air cooling device 1a.

  Further, the liquid gas ratio, that is, the ratio of the supply weight of the cooling water 15 supplied to the cooling unit 2 to the supply weight of the cooled air 11 supplied to the cooling unit 2 is usually 0.3 to 1.5. It is preferable because the balance between the efficiency of the exchange efficiency and the heat exchange rate is good.

  In the present invention, the air to be cooled 11 is not particularly limited. In addition to clean air, air containing fine chemical contaminants that pass through the stitches of a high performance (ULPA) filter can also be used. Examples of chemical pollutants include inorganic metal elements such as sodium, potassium, calcium, and boron, anions such as fluorine ion, chloride ion, nitrate ion, nitrite ion, sulfate ion, and sulfite ion, and ammonium. And cations such as ions.

  In the air cooling apparatus used in the present invention, since the air to be cooled and the cooling water are in direct contact with each other, these chemical contaminants can be taken into the cooling water to obtain clean cooling air. In addition, when the amount of chemical pollutants in the air to be cooled is large, as a means for removing chemical pollutants in the discharged water between the water receiving unit 6 and the cooling water supply means 5 as necessary, for example, It is preferable to use a dewatering device incorporating an ion exchange resin or the like because the cooling water can be kept clean.

  Next, a second embodiment 1b of the air cooling device according to the present invention will be described with reference to FIG. FIG. 6 is a schematic diagram of the second embodiment 1b of the air cooling device. In the air cooling device 1b according to the second embodiment, the same components in FIG. 6 as those in FIG. 1 are denoted by the same reference numerals and the description thereof is omitted, and only different points will be mainly described.

  6 differs from the air cooling device 1a of FIG. 1 in that the cooling unit 2 is disposed substantially horizontally in the vertical duct 70, and the water receiving unit 6 is the cooling unit 2. In the air cooling device 1b, the cooling unit 2 is disposed substantially horizontally in the vertical portion 72 of the L-shaped duct 71 bent upward, and the water receiving portion 6 is provided in the air cooling device 1b. It exists in the point provided in the elbow bottom part 75 of the L-shaped duct 71. FIG.

  The air cooling device 1b has substantially the same operation as the air cooling device 1a according to the first embodiment, but the cooling unit 2 is disposed horizontally in the vertical portion 72 of the L-shaped duct 71, and the cooling unit Since the water receiving part 6 is installed using the elbow bottom part 75 in which the L-shaped duct 71 inevitably has the discharged water 16 discharged from 2, the space-saving property is superior to the air cooling device 1a. Further, when the protruding corner portion 76 is moved backward in the left direction in the drawing to expand the inside of the vertical portion 72 of the L-shaped duct 71, and the cooling unit 2 having the larger areas of the openings 43 and 44 is disposed in the expanded space. It is preferable because the cooling capacity is more excellent.

  Next, a second embodiment of the air cooling method according to the present invention will be described. The method uses the air cooling device 1b to introduce the cooled air 11 into the lower surface opening 44 of the cooling unit 2 and discharge it from the upper surface opening 43, and to cool the cooling water 15 into the upper surface opening 43 of the cooling unit 2. This is an air cooling method for supplying and discharging from the lower surface opening 44. The difference of the method from the method according to the first embodiment is that, in the first embodiment of the air cooling method, the cooling unit 2 is arranged substantially horizontally in the vertical duct 70, whereas the air In the second embodiment of the cooling method, the cooling unit 2 is arranged substantially horizontally in the vertical portion 72 of the L-shaped duct 71. The second embodiment of the air cooling method has substantially the same operation as the first embodiment of the air cooling method, but the cooling unit 2 is arranged substantially horizontally in the vertical portion 72 of the L-shaped duct 71. Therefore, it is excellent in space saving.

  In the second embodiment of the air cooling method, the temperature of the cooling water 15 supplied to the cooling unit 2, the temperature of the cooled air 11 supplied to the cooling unit 2, the liquid gas ratio, the type of the cooled air 11, etc. These are the same as in the first embodiment of the air cooling method.

  The air cooling device according to the present invention is not limited to a duct shape like the air cooling device 1a or 1b, and the cooling unit is a slanted honeycomb like the air cooling device 1a or 1b. Instead of arranging so that the thickness between the upper and lower surfaces is 100 to 600 mm and the skew angle of each cell is 30 to 80 °, the cell direction is the surface formed by the two opposing openings in the case You may arrange | position so that it may become diagonal with respect to. In this embodiment as well, the thickness between the upper and lower surfaces of the skewed honeycomb is usually 100 to 600 mm, preferably 200 to 400 mm. In this embodiment, among the cell directions, the cell directions of some of the cellular cavities intersect at a first angle with respect to the surface formed by the two opposing openings, and the remaining cellular shape What is necessary is just to make it the cell direction of a cavity part cross | intersect at the 2nd angle with respect to this surface to form. The first angle usually has an angle of 30 to 80 °, preferably 45 to 70 ° with respect to the air introduction direction, and the second angle is usually 150 to 100 ° with respect to the air introduction direction, preferably What is necessary is just to make it have an angle of 135-110 degrees.

  The air cooling apparatus and method according to the present invention can be used as an air cooling apparatus and method for air in office buildings, hospitals, and production factories.

  Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto.

  A glass nonwoven fabric formed of E glass fibers and an organic binder was immersed in a slurry containing alumina hydrate as a filler and alumina sol as a binder, then dried and corrugated to obtain a corrugated product. The corrugated object is cut into two different lengths to produce a first corrugated sheet and a second corrugated sheet, and the first corrugated sheet and the second corrugated sheet are alternately arranged so that the wave propagation directions intersect. And then heat-treated at 500 ° C., consisting of 80% by weight of the total amount of alumina and the alumina sol cured product and 20% by weight of E glass fiber, with a porosity of 65%. A rectangular parallelepiped oblique honeycomb was produced. The skew honeycomb has a draining cut portion 65 as shown in FIG. 8 in all the cell openings on the lower surfaces of the first corrugated plate and the second corrugated plate. Next, the slanted honeycomb was incorporated into a case having a size capable of holding the slanted honeycomb and only the upper and lower surfaces being ventilated to form a cooling unit. The cooling unit was mounted in a vertical duct having a rectangular cross section so that the opening on the top faced upward and there was substantially no gap between the inner wall of the vertical duct and the cooling unit. The skew angle of the skew honeycomb when the cooling unit is arranged was set to 60 °. A spray attached with a nozzle for supplying cooling water to the upper surface opening of the cooling unit was attached to the upper part of the cooling unit, and a drain pan for attaching the cooling water that passed through the honeycomb was attached to the lower part of the cooling unit. A skewed honeycomb similar to that used in the cooling unit was mounted in the vertical duct and above the cooling unit so as to face in the same direction as the skewed honeycomb in the cooling unit, thereby forming a demister. Cooling water (discharged water) with an elevated temperature received by a drain pan is sent to a water cooling heat exchanger through a water pump, cooled, and circulated and supplied to the spray. Table 1 shows the conditions of the cooling unit and the like. FIG. 7 shows the meanings of the symbols of dimensions used in this embodiment.

Air of 32 ° C. and 70 rh%, which is the same air condition as in summer, is passed through the device at a flow rate of 10800 m ³ / hour, and cold water of 8 ° C. is supplied from the water supply unit to a water amount of 108 L / min (liquid / gas ratio L / G = 0.5kg / kg) and the pressure loss of the air cooling device was measured. The pressure loss is a value for a portion composed of a cooling unit, a spray, and a drain pan, and does not include the demister. The results are shown in Table 1.

  The pressure loss of the air cooling device was measured in the same manner as in Example 1 except that the draining cut portion as shown in FIG. 9 was used instead of the draining cut portion as shown in FIG. The measurement results are shown in Table 1.

  The pressure loss of the air cooling device was measured in the same manner as in Example 1 except that a water draining pin as shown in FIG. 10 was used instead of the water draining cut portion as shown in FIG. The measurement results are shown in Table 1.

Comparative Example 1
The pressure loss of the air cooling device was measured in the same manner as in Example 1 except that the formation of the draining cut portion was omitted. The measurement results are shown in Table 1. FIG. 7 shows the meanings of the symbols of dimensions used in Comparative Example 1.

＊１ 通気方向に対し幅方向の寸法
＊２ 冷却ユニット設置時に奥行き方向となる方向の下面開口部及び上面開口部の寸法
＊３ 上面開口部−下面開口部間の寸法

* 1 Dimensions in the width direction with respect to the ventilation direction * 2 Dimensions of the lower surface opening and upper surface opening in the depth direction when the cooling unit is installed * 3 Dimensions between the upper surface opening and the lower surface opening

It is a mimetic diagram showing a 1st embodiment of an air cooling device concerning the present invention. It is a schematic diagram explaining a skewed honeycomb. It is a schematic diagram which shows a case. It is a schematic diagram which shows a cooling unit. It is a figure explaining a skew angle. It is a schematic diagram which shows 2nd Embodiment of the air cooling device which concerns on this invention. It is a figure which shows the meaning of the code | symbol of the dimension used in Examples 1-3 and the comparative example 1. FIG. It is a schematic diagram explaining the water draining cut part of the cell opening surface of the lower surface opening part side of a skewed honeycomb. It is a schematic diagram explaining the other draining cut part of the cell opening surface of the lower surface opening part side of a skewed honeycomb. It is a schematic diagram explaining the pin for draining attached to the cell opening surface vicinity of the lower surface opening part side of a skewed honeycomb.

Explanation of symbols

1a, 1b Air cooling device 2 Cooling unit 3 Oblique honeycomb 4 Case 5 Water dispersion device (cooling water supply means)
6 Receiving bread (water receiving part)
11 Cooled Air 12 Cooling Air 15 Cooling Water 16 Discharged Water 20 Corrugated Plate 27 First Corrugated Plate 28 Second Corrugated Plate 37 First Cell 38 Second Cell 40 Cell Direction 43 Upper Case Opening 44 Case Lower Opening 45 Case frame 47 First cell direction 48 Second cell direction 51 Water supply pipe 61 Drainage pipe 65 Drainage cut portion 68 Drainage pin 69 Cell opening 70 Vertical duct 71 L-shaped duct 72 L-shaped duct vertical portion 73 L-shaped duct horizontal Part 74 L-shaped duct elbow part 75 L-shaped duct elbow bottom part 76 L-shaped duct protruding corners 101, 102, 103, 104 Cell openings of the skewed honeycomb A A Skewed honeycomb width B Skewed honeycomb depth C Skewed honeycomb Thickness P Duct width Q Duct horizontal height R Duct vertical depth

Claims (17)

A slanted honeycomb having an outer appearance of a substantially rectangular parallelepiped having a cellular cavity formed by laminating a plurality of corrugated plates and formed in a gap between the laminated corrugated plates is provided with openings on only two opposing surfaces. The case is housed in a case, and the openings on the two opposite surfaces are used as the upper surface opening and the lower surface opening, and the upper surface opening and the lower surface opening are arranged in the duct so as not to be parallel to the air flow direction. A cooling unit, cooling water supply means provided above the upper surface opening of the cooling unit and supplying cooling water to the upper surface opening, and a lower surface opening of the cooling unit attached below the lower surface opening of the cooling unit An air cooling device having a water receiving part for collecting discharged water discharged from the part, and a blowing means for supplying air to the lower surface opening of the cooling unit,
The skewed honeycomb is one in which a draining cut portion is formed at the lower end opening of each cellular cavity, or a draining pin is attached to the lower end opening of each cellular cavity, The cooling unit is arranged so that a cell direction which is a length direction of the cellular cavity portion is inclined with respect to a surface formed by the opening portions of the two opposing surfaces.   2. The air cooling device according to claim 1, wherein the draining cut portion is formed by cutting a corner of a peak portion or a trough portion of a cell forming a lower end opening.   Among the cell directions, the cell directions of some of the cellular cavities intersect at a first angle with respect to the surface formed by the two opposing openings, and the cell direction of the remaining cellular cavities The air cooling device according to claim 1, wherein the air cooling device intersects the surface to be formed at a second angle.   The first angle has an angle of 30 to 80 ° with respect to the air introduction direction, and the second angle has an angle of 150 to 100 ° with respect to the air introduction direction. The air cooling apparatus of any one of -3. A slanted honeycomb having a substantially rectangular parallelepiped appearance formed by laminating a plurality of corrugated sheets is housed in a case having openings on only two opposing surfaces, and the openings on the two opposing surfaces are upper surface openings. And a cooling unit disposed substantially horizontally in the vertical duct as a lower surface opening, cooling water supply means attached above the upper surface opening of the cooling unit and supplying cooling water to the upper surface opening, and the cooling unit An air cooling device having a water receiving portion attached below the lower surface opening of the cooling unit for collecting discharged water discharged from the lower surface opening of the cooling unit, and a blowing means for supplying air to the lower surface opening of the cooling unit Because
The skewed honeycomb is one in which a draining cut portion is formed at the lower end opening of each cellular cavity, or a draining pin is attached to the lower end opening of each cellular cavity, The cooling unit is an air cooling device characterized in that the thickness between the upper and lower surfaces of the skewed honeycomb is 100 to 600 mm, and the skew angle of each cell is 30 to 80 °.   6. The air cooling device according to claim 5, wherein the draining cut portion is obtained by cutting a corner of a cell or a trough of the cell forming the lower end opening. A slanted honeycomb having a substantially rectangular parallelepiped appearance formed by laminating a plurality of corrugated sheets is housed in a case having openings on only two opposing surfaces, and the openings on the two opposing surfaces are upper surface openings. And a cooling unit disposed substantially horizontally in a vertical portion of an L-shaped duct bent upward as a lower surface opening, and cooling water attached to the upper surface opening of the cooling unit and supplying cooling water to the upper surface opening A supply unit, a water receiving unit attached to an elbow bottom of the L-shaped duct and collecting discharged water discharged from the lower surface opening of the cooling unit, and a blowing unit for supplying air to the lower surface opening of the cooling unit An air cooling device comprising:
The skewed honeycomb is one in which a draining cut portion is formed at the lower end opening of each cellular cavity, or a draining pin is attached to the lower end opening of each cellular cavity, The cooling unit is an air cooling device characterized in that the thickness between the upper and lower surfaces of the skewed honeycomb is 100 to 600 mm, and the skew angle of each cell is 30 to 80 °.   8. The air cooling device according to claim 7, wherein the draining cut portion is obtained by cutting a crest or a trough of the cell forming the lower end opening.   The air cooling device according to any one of claims 1 to 8, wherein the water receiving unit and the cooling water supply unit are connected via a discharge water cooling unit and a circulation pump.   2. The corrugated sheet is made of at least one filler or binder selected from the group consisting of alumina, silica and titania, and glass fiber, ceramic fiber or alumina fiber. The air cooling device of any one of -9.   The air cooling device according to claim 1, wherein the corrugated plate has a porosity of 50 to 80%.   The air cooling device according to any one of claims 1 to 11, wherein the skew honeycomb has a cell height of 3.0 to 9.0 mm.   The air cooling device according to any one of claims 1 to 12, wherein a skewed honeycomb similar to the skewed honeycomb is separately installed above the cooling unit and used as a demister.   The air cooling device according to any one of claims 1 to 4, wherein air is introduced into the lower surface opening of the cooling unit and discharged from the upper surface opening, and cooling water is supplied to the upper surface opening of the cooling unit. An air cooling method comprising supplying and discharging from a lower surface opening.   6. The air cooling device according to claim 5, wherein air is introduced into the lower surface opening of the cooling unit and discharged from the upper surface opening, and cooling water is supplied to the upper surface opening of the cooling unit from the lower surface opening. An air cooling method characterized by being an air cooling method for discharging.   The air cooling device according to claim 7, wherein air is introduced from the horizontal portion of the L-shaped duct into the lower surface opening of the cooling unit and discharged from the upper surface opening, and cooling water is discharged from the vertical portion of the L-shaped duct. An air cooling method, characterized in that the air cooling method supplies the air to the upper surface opening of the cooling unit and discharges it from the lower surface opening.   The air ratio according to claim 15 or 16, wherein a liquid gas ratio between a supply weight of cooling water supplied to the cooling unit and a supply weight of air supplied to the cooling unit is 0.3 to 1.5. Cooling method.

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