JP4094302B2 - Oil mist removal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil mist removing apparatus for exchanging heat of air containing oil mist and removing oil mist.
[0002]
[Prior art]
During cutting or precision machining of materials in a machining factory or a precision machine factory, so-called oil mist is generated by dispersing cutting oil or the like as fine smoke in the air. This oil mist harms the health of workers, and when the concentration is high, it smokes pale or milky white in the room, reducing the line-of-sight distance and making it easier to slip on the floor and make it safer to work. Remarkably inhibited. Furthermore, if the air containing oil mist is discharged to the outside, it will contribute to air pollution. Accordingly, there is a need for an oil mist removing device that can reliably remove such oil mist.
[0003]
As such an oil mist removing device, there has been a static type removing device that has been widely employed. This apparatus is constituted by a needle or a linear discharge electrode and a flat plate or cylindrical smooth dust collecting electrode. When a DC high voltage is applied between the two electrodes to generate corona discharge, and air containing oil mist is passed between the two electrodes, the oil mist receives Coulomb force and moves to the dust collecting electrode. It is collected.
[0004]
In addition, a filtration type or cleaning type dust collector may be used as the removal device. The filtration method is a method of collecting oil mist using an air filter. The cleaning method is a method of collecting oil mist by colliding an air flow containing oil mist with a liquid such as a droplet or a liquid film, and examples thereof include a venturi scrubber and a packed tower.
[0005]
[Problems to be solved by the invention]
Incidentally, the conventional oil mist removing apparatus as described above has the following problems. That is, in the electrostatic system, the collected oil mist adheres to the inside of the apparatus, so that frequent maintenance is required and failure is likely to occur. This becomes even more problematic in the case of oil mist with high tackiness. Further, since this method uses a high voltage, it is necessary to employ various insulating structures from the viewpoint of safety and the like, which increases the cost.
[0006]
In order to cope with this, even if a method other than the above is adopted, there are the following problems. First, in the case of the filtration method, the filter is likely to be clogged, and frequent cleaning work and replacement work are required. In addition, in the case of the cleaning method, it is difficult to reduce the size of the apparatus. In particular, when trying to capture submicron (1 μm or less) mist, which is the target particle size of oil mist in a cutting factory or the like, a large amount of cleaning liquid or complicated A gas flow path is required, and it is difficult to solve the problem. Furthermore, it is required to reliably wash the member that has captured the mist so that the once-captured oil mist does not scatter again.
[0007]
The present invention has been proposed to solve the above-described problems of the prior art, and an object thereof is to provide an oil mist removing device that can efficiently remove oil mist and does not require maintenance. There is to do.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, an oil mist removing device according to claim 1 is a cooling coil for cooling air containing oil mist flowing into an air flow path between an air intake port and an air supply port.And humidifying means for humidifying the air containing the oil mist flowing in from the air intake before the cooling coil, and supply means for supplying moisture for humidification to the humidifying means,The cooling coil includes a pipe through which a heat medium circulates and a plate fin attached to the pipe, and a cooling device that cools and supplies the heat medium is connected to the pipe. To do. In the invention according to claim 1 as described above, air containing oil mist flows in from the air intake port, and this air is cooled by passing through while contacting the plate fins of the cooling coil. Then, moisture and oil mist in the air condense, and a thin water film is formed on the surface of the plate fin. The oil mist that flows in after that comes into direct contact with this water film is absorbed, dissolved, and removed.Furthermore, air containing oil mist that has flowed in from the air intake port is humidified by the humidifying means even when it is not at high humidity, so that it is cooled when passing through the plate fins, and its moisture and oil mist are condensed. A thin water film is formed on the surface of the plate fin. By doing so, the oil mist is efficiently absorbed and dissolved in the water film and removed.
[0009]
According to a second aspect of the present invention, there is provided the oil mist removing apparatus according to the first aspect, wherein a cleaning means for cleaning the plate fins of the cooling coil by injecting electrolytic strong alkaline water and an electrolytic strong alkali Electrolytic strong alkaline water supply means for supplying water is provided.
In the invention according to claim 2 as described above, the plate fin of the cooling coil is cleaned by periodically spraying electrolytic strong alkaline water with a cleaning means to clean the plate fin surface. Since dirt such as mist and solids is prevented from sticking, it is always kept clean and maintenance work can be saved.
[0010]
According to a third aspect of the present invention, in the oil mist removing apparatus according to the second aspect, the cleaning means is movably provided so that a cleaning liquid is applied to the entire surface of the plate fin.
In the invention according to the third aspect as described above, since the cleaning means moves, it is possible to efficiently clean the entire surface of the plate fin while realizing the compactness of the cleaning means.
[0011]
According to a fourth aspect of the present invention, in the oil mist removing apparatus according to the second or third aspect, high-pressure air supply means for blowing high-pressure air to the plate fin is provided.
In the invention according to the fourth aspect as described above, since the high pressure air supply means blows out the high pressure air to the plate fin, the oil mist washed off by the cleaning means can be easily blown off from the plate fin. Therefore, oil mist does not remain on the plate fin.
[0013]
  The invention according to claim 5 provides the first to fourth aspects.The oil mist removing apparatus according to any one of the above, characterized in that the apparatus includes a dropping unit that drops moisture from an upper portion of the plate fin, and a supply unit that supplies dropping moisture to the dropping unit. . In the invention according to the sixth aspect as described above, when water is dropped from the upper part of the plate fin by the dropping means, a water film on the surface of the plate fin is more easily formed, so that the oil mist collecting efficiency is increased.
[0014]
  The invention described in claim 6 is described in claim 5.In the oil mist removing apparatus, a water-retaining or water-absorbing mat is disposed between the dropping means and the plate fin. In the invention according to claim 7 as described above, since the water retaining or water absorbing mat is disposed between the dropping means and the plate fin, even if a large number of plate fins are disposed, The water is uniformly dispersed and dripped onto all the plate fins.
[0015]
  The invention according to claim 7 is the first to sixth aspects.In the oil mist removing apparatus according to any one of the above, the supply unit includes an electrolytic strong alkaline water generating apparatus that generates electrolytic strong alkaline water as supplied water. In the invention according to claim 8 as described above, a water film is more easily formed on the surface of the plate fin due to the surface active effect of the electrolytic strong alkaline water dropped on the humidified spray or the plate fin, and the viscosity is increased by the cleaning effect. High dirt mist and solid matter are prevented from adhering to the surface of the plate fin.
[0016]
  The invention according to claim 8 is the first to seventh aspects.In the oil mist removing device according to any one of the above, a plurality of holes are formed in the plate fin so that the entire surface of the plate fin becomes a wet surface covered with a water film. To do. In the invention according to the ninth aspect as described above, since the electrolytically strong alkaline water is distributed over the entire surface of the plate fin by the plurality of holes formed in the plate fin, a uniform and stable oil mist absorption / dissolution effect is obtained. be able to.
[0017]
  The invention of claim 9 is the invention of claims 1-8.In the oil mist removing apparatus according to any one of the above, an air blower is installed on the downstream side of the air flow path in the cooling coil, and an emlinator is provided between the cooling coil and the air blower. In the above invention of claim 10, since the emilator is provided between the cooling coil and the blower, only the air passes, and the washing liquid containing the oil mist after washing the cooling coil is not applied to the blower. Mist re-scattering can be reliably prevented.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of an air conditioner according to the present invention will be specifically described below with reference to the drawings.
1. First embodiment
1-1. Constitution
First, an embodiment corresponding to the inventions of claims 1 and 2 and claim 9 will be described with reference to FIGS. That is, as shown in FIG. 1, a cooling coil 2 that cools air with cold water into a housing 1 that has an air intake port on the left side and an air supply port on the right side, and cleaning that injects electrolytic strong alkaline water into the cooling coil 2 A nozzle 3 and an air exhaust 4 for discharging air to the outside of the housing 1 are disposed. The present embodiment also includes a cold water generating device 5 for supplying cold water to the cooling coil 2, an electrolytic water generating device 6 for supplying electrolytic strong alkaline water to the cleaning nozzle 3, the cleaning nozzle 3, and the cooling coil 2. A drainage tank 7 for collecting the dropped water is provided. The cleaning nozzle 3, the cold water generating device 5, and the electrolyzed water generating device 6 correspond to the cleaning means, the cooling device, and the electrolytic strong alkaline water supply means described in the claims, respectively.
[0019]
As shown in FIG. 2, the cooling coil 2 includes a plurality of rectangular plate fins 21 made of aluminum, and metal tubes 20 meanderingly disposed in these plate fins 21. Both ends of the pipe 20 are a cold water inlet 20a and a cold water outlet 20b. The cold water inlet 20a and the cold water outlet 20b are connected to the cold water generator 5 via a pipe or the like provided with a pump 50 and a flow rate adjustment valve 51 so that the cold water can be circulated in the pipe 20. The cold water generating device 5 is a device that cools the circulating water by heat exchange with a refrigerant such as brine.
[0020]
As shown in FIG. 3, the plate fin 21 of the cooling coil 2 has a large number of small holes 21a formed on the entire surface thereof. A cleaning nozzle 3 is provided on the upstream side of the cooling coil 2 to inject electrolytic strong alkaline water onto the plate fins 21. An electrolytic water generator 6 is connected to the cleaning nozzle 3 via a pipe provided with a pump 60 and a flow rate adjustment valve 61 so that electrolytically strong alkaline water can be supplied. The electrolyzed water generator 6 is an apparatus that generates strong alkaline water and strong acid water by electrolyzing an aqueous electrolyte solution such as about 0.1 to 1% diluted saline. Here, the strong alkaline water usually means one having a pH of about 11.0 to 12.2, but the strong alkaline water used in the present invention is not limited to this value.
[0021]
Further, a container for receiving the dropped water is disposed below the plate fin 21 in the cooling coil 2, and a drain port 22 is formed in the container. Although not shown, a water tank for receiving water from the drain port 22 is provided at the lower portion of the cooling coil 2. This water tank is connected to the drainage tank 7 through a pipe. Furthermore, in the electrolyzed water generating device 6, the electrolyzed water is generated via a pipe provided with a pump 60 and a flow rate adjusting valve 61 so that the electrolyzed acidic acidic water generated as a secondary flow into the drainage tank 7. It is connected to the device 6. The flow rate control by the flow rate adjusting valves 51 and 61 and the management of the cleaning time by the cleaning nozzle 3 can be performed manually, but can also be automated by a control device.
[0022]
1-2. Action
The operation of the present embodiment having the above configuration will be described below. First, the exhaust fan 4, the cold water production | generation apparatus 5, and the pump 50 are operated. The air containing oil mist flowing in from the air intake is cooled to, for example, a dew point temperature of about 5 ° C. or less when passing through the cooling coil 2 in which cold water circulates in the pipe 20. The moisture and oil mist inside condense on the surface of the plate fin 21. Then, a thin water film (hereinafter referred to as a wet wall) is formed on the entire surface of the plate fin 21 in which the small holes 21a are formed, and the oil mist that flows in thereafter forms a wet wall by directly contacting the wet wall. Absorbed and dissolved in liquid. The clean air from which the oil mist has been removed in this way is supplied into the room or the like from the air supply port.
[0023]
For the plate fin 21 of the cooling coil 2, for example, by periodically operating the electrolyzed water generating device 6 and the pump 60 at a rate of once every 4 hours, electrolytic strong alkaline water is supplied from the cleaning nozzle 3. Is injected. Then, the cleaning effect of electrolytically strong alkaline water prevents oil mist and other substances from adhering to the surface of the plate fin 21, and a clean state is always maintained.
[0024]
As described above, the water that has absorbed and dissolved the oil mist and the electrolytically strong alkaline water used for washing are dropped from the cooling coil 2 and drained from the drain port 22, and drained through the water tank disposed at the bottom. It flows into the tank 7. In the electrolyzed water generating device 6, the electrolyzed acidic water generated simultaneously with the electrolyzed alkaline water is sent to the drain tank 7 by the pump 60. In the drainage tank 7, the electrolytically strong alkaline water is neutralized by the electrolytically strong acidic water and drained appropriately.
[0025]
1-3. effect
According to the present embodiment as described above, oil mist can be efficiently removed in the process of cooling air. In addition, most oil mist and other substances are absorbed and dissolved by the wet wall and fall and discharge downward, so maintenance is not required. In particular, since the plate fins 21 are periodically cleaned by electrolytically strong alkaline water having a high cleaning effect, the adhesion of oil mist and other substances is completely prevented, and the need for maintenance is eliminated.
[0026]
In addition, the plurality of small holes 21a formed in the plate fin 21 can reliably form a wet wall on the entire plate fin 21, so that uniform and stable oil mist removal efficiency can be obtained.
[0027]
Since the oil mist is removed from the inflowing air and cooled at the same time, for example, a part of the heat load generated from the production apparatus in the factory can be processed near the generation source, and the air conditioner for cooling the factory The heat load applied to is reduced. Therefore, the heat load from the production apparatus is not diffused indoors, and a good indoor thermal environment is obtained. In addition, energy can be saved by circulating clean air from which oil mist has been removed into the room. Furthermore, since the configuration is simple, it is easy to cope with downsizing and upsizing, and it is difficult to cause a failure and can be manufactured at low cost.
[0028]
2. Second embodiment
2-1. Constitution
Embodiments corresponding to the fifth to ninth aspects of the present invention will be described with reference to FIGS. Note that members similar to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. That is, this embodiment basically has the same configuration as that of the first embodiment as shown in FIG. However, in addition to the first embodiment, a humidifying nozzle 8 for spraying electrolytic strong alkaline water onto the air flowing into the housing 1, a dropping device 9 for dropping electrolytic strong alkaline water to the cooling coil 2, and the like are provided. In addition, the humidification nozzle 8, the dripping apparatus 9, and the electrolyzed water production | generation apparatus 6 respond | correspond to the humidification means, the dripping means, and the electrolytic strong alkaline water production | generation apparatus as described in a claim, respectively.
[0029]
An electrolyzed water generating device 6 is connected to the humidifying nozzle 8 and the dripping device 9 via a pipe provided with a pump 60 and a flow rate adjusting valve 61 so that electrolytically strong alkaline water can be supplied. As shown in FIGS. 6 and 7, a mat 23 made of a water-absorbing or water-retaining material is disposed on the cooling coil 2, and electrolytic strong alkaline water is disposed on the mat 23. Is provided. Further, the electrolytically strong alkaline water sprayed and dropped from the humidifying nozzle 8 is also configured to be discharged to the drain tank 7 as in the first embodiment.
[0030]
2-2. Action
The operation of the present embodiment having the above configuration will be described below. Note that “˜” shown in FIG. 8 corresponds to the air state at the “˜” position shown in FIG. However, the specific numerical values in FIG. 8 are examples, and the characteristics of the present invention are not limited to these numerical values. First, the ventilator 4, the cold water production | generation apparatus 5, the electrolyzed water production | generation apparatus 6, pumps 50 and 60 grade | etc., Are operated. The air containing oil mist flowing in from the air intake (point) is humidified to a relative humidity of nearly 100% by the electrolytically strong alkaline water supplied from the electrolyzed water generating device 6 and sprayed from the humidifying nozzle 8 (point). .
[0031]
Next, the humidified air is cooled to, for example, about 5 ° C. in the cooling coil 2 in which cold water circulates in the pipe 20 (point). At this time, moisture and oil mist in the air condense, and a wet wall is formed on the entire surface of the plate fin 21 in which the small holes 21a are formed. For example, exhaust including oil mist from production equipment is not necessarily high humidity, but it becomes high humidity air by forcibly humidifying as described above, so that a wet wall is easily formed. ing. When the wet wall is formed in this way, the oil mist is absorbed and dissolved in the wet wall as in the first embodiment.
[0032]
At the same time, the electrolytically strong alkaline water is supplied from the dropping device 9 to the mat 23 and further dropped from the mat 23 to each plate fin 21. For this reason, the wet wall on the surface of the plate fin 21 is more easily formed by the surface active effect of the electrolytically strong alkaline water. Further, the oil mist is prevented from adhering to the surface of the plate fins 21 due to the cleaning effect of the dropped electrolytic alkaline water.
[0033]
The electrolytically strong alkaline water dropped from the humidifying nozzle 8 or the cooling coil 2 is collected in a water tank arranged at the lower part and flows into the drainage tank 7. The electrolytically strong acidic water generated in the electrolyzed water generating device 6 is sent out to the drainage tank 7 by the pump 60. In the drainage tank 7, the electrolytically strong alkaline water is neutralized by the electrolytically strong acidic water and drained appropriately.
[0034]
2-3. effect
According to the present embodiment as described above, the same effects as those of the first embodiment can be obtained, and even if the exhaust from the production apparatus is not high humidity, it is forcibly forced by electrolytic strong alkaline water. Since humidified air is used as high-humidity air, it becomes easy to form a wet wall in the plate fin 21 and oil mist can be reliably removed. Moreover, since electrolytic strong alkaline water is dripped at the plate fin 21, a wet wall becomes easier to form. At the same time, the effect of cleaning the plate fins 21 is obtained by the electrolytically strong alkaline water dropped, so that the oil mist is prevented from adhering. Furthermore, since the water is dropped onto the plurality of plate fins 21 through the water-absorbing or water-retaining mat 23, the water is uniformly distributed to all the plate fins 21, and the oil mist removal efficiency is improved.
[0035]
3. Other embodiments
The present invention is not limited to the embodiment as described above. The water sprayed from the humidifying nozzle 8 and the water dropped from the dropping device 9 do not necessarily need to be electrolytically strong alkaline water. For example, as shown in FIG. Although the cleaning effect is reduced, almost the same performance can be obtained. With such a configuration, the operation amount and capacity of the electrolyzed water generating device can be saved, and the manufacturing cost and running cost can be reduced.
[0036]
As long as the cooling coil includes plate fins and tubes, the number and shape of the plate fins and tubes are not limited to those shown in the above embodiment, regardless of the type. The material of the plate fins and pipes is not limited to that shown in the above embodiment. For example, the antibacterial property can be enhanced by using copper or adding silver ions.
[0037]
As a method of ensuring a sufficient wet area by giving hydrophilicity to the plate fin, in consideration of durability and cost, a method of forming a large number of holes as in the above embodiment is suitable. The following method is also applicable. For example, it is conceivable that the plate fin is applied with a hydrophilic paint, or the plate fin is provided with an uneven shape.
[0038]
The size, shape, and number of small holes formed in the plate fins are not limited to those shown in the above embodiment as long as they can have hydrophilicity and water retention. For example, if each small hole is lengthened in the horizontal direction and formed so that the space between the small holes in the upper stage and the center of each small hole in the lower stage come alternately, the water spreads in the horizontal direction and Water that falls between them enters the center of the lower stoma and is retained. Therefore, it is possible to reliably realize the uniform distribution of water over the entire plate fin.
[0039]
Although the cooling coil, the washing nozzle, the humidifying nozzle and the like are each installed one by one in the above-described embodiment, a plurality of cooling coils, cleaning nozzles, humidification nozzles, and the like may be installed. A configuration including only one of the humidifying nozzle and the dripping device is also possible. More specifically, the present invention includes the embodiments shown in FIGS. That is, the embodiment shown in FIG. 10 corresponds to the invention of claim 3 and is characterized in that an automatic cleaning device 14 in which cleaning means is movably arranged is provided. The automatic cleaning device 14 is provided with a pipe 14a connected to the cleaning water supply pipe 15, and a cleaning water injection nozzle 14b is attached to the pipe 14a. The injection nozzles 14b are arranged at regular intervals in a straight line in the vertical direction. The automatic cleaning device 14 is provided with a drive unit 14c for supporting the pipe 14a at the upper and lower portions. The drive unit 14c is configured to reciprocate the injection nozzle 14b together with the pipe 14a in the lateral direction.
[0040]
According to such an embodiment, the coil cleaning device 14 periodically cleans the cooling coil 2 by intermittently spraying cleaning water from the spray nozzle 14a. In addition, in the coil cleaning device 14, the spray nozzle 14a reciprocates in the horizontal direction by the action of the drive unit 14b, so that the entire cooling coil 2 can be washed evenly and oil mist remaining in the cooling coil 2 can be prevented. For this reason, the cooling coil 2 can always maintain a clean state, and it becomes possible to maintain the oil mist collection efficiency by the cooling coil 2 at a high level.
[0041]
Further, the embodiment shown in FIG. 11 corresponds to the invention of claim 4 and is obtained by improving the embodiment shown in FIG. In this embodiment, a turbo blower 24 for blowing high-pressure air to the cooling coil 2 from the same direction as the cleaning liquid is disposed. The turbo blower 24 corresponds to the high-pressure air supply means described in claim 4.
[0042]
According to such an embodiment, by blowing high pressure air from the turbo blower 24 to the cooling coil 2, the oil mist adhering to the cooling coil 2 can be blown off and removed. Therefore, oil mist does not remain in the cooling coil 2, and the purification performance of the cooling coil 2 can be improved and the oil mist collection efficiency can be improved. Further, when the high-pressure air supply device is operated simultaneously as an automatic cleaning device, the cleaning effect can be further enhanced.
[0043]
Furthermore, as shown in FIG. 12, an emilator 25 may be provided between the cooling coil 2 and the exhaust fan 4 in the housing 1 of FIG. 1 (corresponding to claim 10). Here, the exhaust fan 4 corresponds to the blower described in claim 10. In this embodiment, since the emilator 25 is provided between the cooling coil 2 and the exhaust fan 4, the air passes well behind the cooling coil 2, and the cleaning liquid including the oil mist after cleaning the cooling coil 2 is used as the exhaust fan. 4 does not take. Therefore, re-scattering of oil mist can be reliably prevented.
[0044]
Further, the heat medium for cooling the plate fins 21 and the cooling device thereof are not limited to those shown in the above embodiment, and the cooling method, the refrigerant to be used, etc. are also free. Also about the apparatus which produces | generates electrolytic strong alkaline water, the electrolyte aqueous solution to be used, the method of electrolysis, the pH value of the produced | generated electrolytic strong alkaline water, etc. are not limited to the above-mentioned thing.
[0045]
The setting temperature of the cooling coil shown in the above embodiment, the degree of humidification by the humidification nozzle, the interval of periodic cleaning by the cleaning nozzle, the cleaning time, and the like can be freely set. It is also possible for the user to manually clean at the desired time. The oil mist to be removed in the present invention is not necessarily limited to water-soluble ones, and the particle size is not limited to a specific one. Furthermore, although the oil mist removing apparatus of the present invention can be provided with a small apparatus for each area such as a factory, the exhaust can be collected for each area and processed by a somewhat large apparatus.
[0046]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an oil mist removing apparatus that can efficiently remove oil mist and that does not require maintenance.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a first embodiment of an oil mist removing apparatus according to the present invention.
FIG. 2 is a perspective view showing a cooling coil in the embodiment of FIG.
3 is an enlarged view of part A in FIG. 2 showing plate fins of the cooling coil in the embodiment of FIG.
4 is a side view of FIG. 2. FIG.
FIG. 5 is a configuration diagram showing a second embodiment of the oil mist removing apparatus of the present invention.
6 is a perspective view showing a cooling coil in the embodiment of FIG. 5; FIG.
7 is a side view of FIG. 6. FIG.
8 is a moist air diagram showing an example of temperature and humidity changes in the embodiment of FIG.
FIG. 9 is a block diagram showing another embodiment of the oil mist removing apparatus of the present invention.
FIG. 10 is a perspective view showing another embodiment of the oil mist removing apparatus of the present invention.
FIG. 11 is a perspective view showing another embodiment of the oil mist removing apparatus of the present invention.
FIG. 12 is a main part configuration diagram showing another embodiment of the oil mist removing apparatus of the present invention.
[Explanation of symbols]
1 ... Housing
2 ... Cooling coil
3 ... Cleaning nozzle
4 ... Ventilator
5 ... Cold water generator
6 ... Electrolyzed water generator
7 ... Drain tank
8 ... Humidification nozzle
9 ... Drip device
14 ... Coil cleaning device
14a ... pipe
14b ... Injection nozzle
14c ... Drive unit
20 ... pipe
20a ... Cold water outlet
20b ... Cold water inlet
21 ... Plate fin
22 ... Drain outlet
23 ... Matte
24 ... Turbo blower
25 ... Emilinator
50, 60 ... Pump
51, 61 ... Flow control valve

Claims (9)

A cooling coil for cooling air including oil mist flowing into the air flow path between the air intake port and the air supply port ;
Humidifying means for humidifying air including oil mist flowing in from the air intake before the cooling coil;
Supply means for supplying moisture for humidification to the humidifying means,
The cooling coil has a pipe through which a heat medium circulates and a plate fin attached to the pipe, and a cooling device that cools and supplies the heat medium is connected to the pipe. Oil mist removal device.   A cleaning means for injecting and cleaning electrolytic strong alkaline water to the plate fin of the cooling coil, and an electrolytic strong alkaline water supply means for supplying electrolytic strong alkaline water to the cleaning means. The oil mist removing apparatus according to claim 1.   3. The oil mist removing apparatus according to claim 2, wherein the cleaning means is movably provided so that the cleaning liquid is applied to the entire surface of the plate fin.   4. The oil mist removing apparatus according to claim 2, further comprising high-pressure air supply means for blowing high-pressure air to the plate fins. The oil according to any one of claims 1 to 4 , further comprising: a dropping unit that drops water from an upper part of the plate fin; and a supply unit that supplies water for dropping to the dropping unit. Mist removal device. 6. The oil mist removing apparatus according to claim 5 , wherein a water retention or water absorption mat is disposed between the dripping means and the plate fin. The oil mist removing apparatus according to claim 1 , wherein the supply unit includes an electrolytic strong alkaline water generating device that generates electrolytic strong alkaline water as water to be supplied. Entire plate fin surfaces, so that the covered wet wall water film, according to claim 1, wherein a plurality of holes in the plate fins are formed Oil mist removal device. The oil mist according to any one of claims 1 to 8 , wherein a blower is installed on the downstream side of the air flow path in the cooling coil, and an emilator is provided between the cooling coil and the blower. Removal device.

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