JPH01291027A - Water-washing type air-cleaning and sterilizing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention is aimed at bio-clean rooms to reduce dust.

The present invention relates to a water washing type air purifying and sterilizing device that cleans indoor air by removing dust and bacteria by circulating indoor air containing bacteria between a washing tower and a water washing tower.

[Conventional technology]

Bio-clean rooms used in food manufacturing, pharmaceutical manufacturing, and medical fields are required to not only remove dust but also remove carbon dioxide from airborne microorganisms due to the need to sterilize the indoor environment and prevent biohazards. A water-washing type that uses a water-washing tower as a paddy removal device to remove and sterilize floating dust, R, etc. from the treated air through its washing and collection action, and further sterilizes the collected waste with ozone. Air purification.

A sterilization device has already been proposed in Japanese Patent Application Laid-Open No. 62-69033.

Next is the water cleaning type air purifier as shown in Figure 2.

In Figure 0 explaining the conventional system of the removal r11 device,
1 is a bio-clean room, 2 is a blower, and 3 is a water washing tower. An air 'Xv&circular air passage 4 passing through the water washing tower 3 is formed.

On the other hand, the water washing tower 3 is equipped with a water receiving tank 31 at its bottom, and an eliminator 32 for removing drips and a water spray nozzle 33 at the upper part of the ventilation passage in the tower. It is configured to supply water to the water spray nozzle 33 and spray it onto the in-column ffi passage.

Furthermore, an ozone diffuser pipe 51 immersed in the water tank 31 and connected to an external ozonizer 5 is connected to the i! llll! Equipped with 1B35 is an F-lencock for draining water.

In order to remove dust and dirt from the air in the bio-clean room 1 with this configuration, first, the ozone generated by the ozonizer 5 is diffused into the water stored in the water receiving tank 31 in the water washing tower 3 through the ozone diffuser pipe 51 to diffuse ozone into the water. While dissolving and collecting water, the water in the water tank 31 is sprayed into the ventilation passage in the tower from the water spray nozzle 33, and in this state, the blower 2 is operated to wash the air containing dust and bacteria sucked from the bio-clean room 1 with water. Air is forced into the tower through a duct that opens on the side of the tower 3.

As a result, the treated air flow A is sprayed by the water shower B ejected from the water nozzle 33 in a countercurrent manner in the process of ascending through the ventilation passage in the washing tower 3, and the dust floating in the treated air is removed. Bacteria adhering to the dust are taken into water droplets and separated and collected by the cleaning and dust collection action of the water shower, and the treated air stream A is cleaned of dust.

Il# bacteria are performed. Further, the air purified in the water washing tower 3 has water droplets removed by an eliminator 32, and then is returned and discharged into the room through the air supply port 12 of the bioclean room 1. On the other hand, the shower water that has collected dust and bacteria settles in the tower due to its own weight and is collected in the water receiving tank 31, after which it is repeatedly used so as to be supplied to the water nozzle 33 via the pump 34 again. Moreover, there is an ozonizer 5 in the water in the water tank 31.
Ozone C supplied through the ozone diffuser pipe 51 is dissolved and absorbed, and the bacteria collected by the water shower are rapidly sterilized by contact reaction with the ozone-absorbed water.

[Problem to be solved by the invention]

By the way, if the above-mentioned conventional device is operated throughout the year, the following problems arise in terms of the weight removal effect.

That is, the temperature of the water stored in the water receiving tank 31 of the water washing tower 3 is greatly affected by the ambient temperature, and varies greatly throughout the year, such as being low in winter and high in summer.

On the other hand, when ozone is diffused into water and dissolved and absorbed,
The relationship between the distribution coefficient, which represents the ratio between the amount of supplied ozone and the amount of dissolved ozone in water, and water temperature is as shown in the characteristic diagram in Figure 3.The distribution coefficient tends to increase as the water temperature decreases. Even when the same amount of ozone is supplied, the higher the water temperature, the lower the ozone absorption rate, and conversely, the lower the water temperature, the higher the ozone absorption rate. It is also known that the higher the water temperature, the faster the rate of self-decomposition of ozone dissolved in water, converting ozone into oxygen in a short time.

Therefore, in the conventional device shown in FIG. 2, assuming that the same amount of ozone is supplied from the water receiving tank 31 and the ozonizer 5, the ozone partition coefficient 9 decomposition rate with respect to the water stored in the water receiving tank, that is, the ozone concentration of the stored water, changes depending on the ambient temperature. fluctuate.

Moreover, the water tank 31 collects bacteria collected from the air using a water shower.
The ability to sterilize in water depends on the ozone concentration of ozonated water, so when the water temperature rises, especially in the summer, the self-decomposition rate of ozone accelerates, and the sterilizing ability of ozonated water decreases. As a result, bacteria begin to proliferate within the water tank. Furthermore, when water containing many viable bacteria is sprayed into the circulating air stream through the water spray nozzle 33, the water shower cannot wash and collect it, and the threshold is re-splattered and enters the bio-clean room 1 along with the air stream. As a result, the sterilization rate of water-based air purifiers and wig removers decreases.

The present invention has been developed in consideration of the above points, and even when operating a water cleaning type air purifier or WkW device throughout the year, it is possible to always maintain stable and high sterilization efficiency without being affected by the ambient temperature. Moreover, when the indoor air in the bio-clean room is circulated between the water washing tower and the water washing tower, the temperature of the air that is returned to the room can be adjusted to an appropriate temperature according to the air temperature required by the bio-clean room. The purpose is to provide cleaning air purification and sterilization equipment.

[! ! Means to solve shin problems]

In order to solve the above problems, in the device of the present invention,
Cooling means that keeps the water stored in the water receiving tank of the washing tower at a constant low temperature and the air temperature installed in the circulation ventilation path between the downstream side of the washing tower and the bio-clean room! Il! It shall be constructed by including an air heating means for lff.

[Effect]

With the above configuration, a chilling unit is connected to the water receiving tank of the washing tower as a cooling means, and the air temperature inside the circulation ventilation duct on the outlet side of the washing tower is used as an air heating means. A 1m heater is installed, and the chilling unit controls operation to maintain the temperature of the stored water in the water tank at around 9 to 11"C throughout the year. A 11u air temperature heater is also required by the bioclean room. Electricity is controlled to maintain the temperature of the air flowing back from the water washing tower to the bio-clean room at an appropriate temperature based on the temperature standard.

This ensures that the temperature of the water stored in the water tank is always maintained at a low temperature without being affected by fluctuations in ambient temperature, and that the ozone absorption efficiency, or removal rate, of ozone into the water is maintained at a high level throughout the year. At the same time, the circulating air whose temperature has decreased due to water showering can be returned to a predetermined temperature and then returned to the bioclean room.
Embodiment] FIG. 1 shows a system diagram of an embodiment of the present invention, and the same parts corresponding to FIG. 2 are given the same reference numerals. First, in the illustrated embodiment, an independent ozone dissolution tank 6 is installed in parallel with the water washing tower 3, and a WIN water supply channel 62 including a pump 61 is connected between the ozone dissolution tank 6 and the water receiving p131 of the water washing tower 3. and an ozone diffuser pipe 5 connected to the ozonizer 5 at the bottom of the ozone dissolving tank 6.
1 is deployed. Note that 63 is a wandering ozone treatment device connected to the top of the ozone dissolution tank 6. Here, ozone dissolution tank 6
The ozone generated by the ozonizer 5 is diffused into the water of the ozone dissolving tank 6 through the ozone diffuser pipe 51 while circulating water between the water receiving tank 31 of the washing tower 3 and the ozone is dissolved and absorbed in the water. , and the ozone-absorbed water is in the washing tower 3.
During the process of circulating water between the water receiving tank 31 and the water receiving tank 31, the soybeans separated and collected from the treated air stream are destroyed.

With such a configuration, the water receiving tank 3 of the water washing tower 3 according to the present invention! On the other hand, a chilling unit designated by reference numeral 7 is connected as a cooling means for the stored water via an 8M water pipe 72 including a water pump 71. Furthermore, in the air circulation ventilation duct between the washing tower 3 and the bioclean room 1 on the downstream side, a heating heater 8 for controlling the air temperature is interposed.

Here, the chilling unit 7 is operated to maintain the temperature of the water stored in the water receiving tank 31 at 9 to 11 degrees Celsius in order to maintain the distribution coefficient of ozone to water as shown in the characteristic diagram of FIG. The heater 8 is controlled so that the air temperature is set to 12±3°C, for example, and the air temperature set at 12±3°C is set for the air flowing back into the bioclean room L1 through the water washing tower 3.
It is set so that it turns on when it is below 0"C and turns off when it is above 11℃.
t@m is done.

In the illustrated embodiment, an ozone dissolving tank is attached to the water washing tower 3, ozone is diffused there, and the ozonated water generated here is sent to the water receiving tank 31 of the washing tower 3. , it goes without saying that the chilling unit can be similarly applied to a device that diffuses ozone directly into the water in the water receiving tank 31 of the water washing tower 3 as shown in FIG. It is also possible to carry out the process by connecting to the tank 6.

〔Effect of the invention〕

The water cleaning type air purifying and sterilizing device of the present invention is configured as described above, and therefore has the following effects.

In other words, it is equipped with a cooling means that constantly maintains the water stored in the water receiving tank of the washing tower at a low temperature, and an air heating means for controlling the air temperature, which is installed in the circulation ventilation path between the washing tower and the bio-clean room on the downstream side. As a result, 1′! l It is possible to maintain a high ozone absorption rate in the water stored in the water tank throughout the year without being affected by the effects of circadian temperature, and to perform effective sterilization treatment. The water cleaning air purifier and vIi device is highly effective in purifying and sterilizing indoor air for bio-clean rooms, such as by being able to adjust the temperature of the air flowing through the Xi to the appropriate temperature required indoors. It will be done.

[Brief explanation of the drawing]

Figures 1 and 2 are system diagrams of an embodiment of the present invention and a conventional water-washing dormitory air purifier/exhaust system, respectively.
! I is a characteristic diagram showing the relationship between ozone water temperature and distribution coefficient. In each figure, l: bio clean room, 2 niblore, 3: water washing tower,
31: Water tank, 33: Water nozzle, 42 Indoor air circulation channel, 5: Ozonizer, 51 Niosin diffuser pipe, 7: Chilling unit, 8: Air temperature control 2nd! ! l

Claims (1)

[Claims] 1) A water washing type air purifier and sterilization device that cleans indoor air with water to remove dust and bacteria, targeting bio-clean rooms, etc. A water washing tower has a water nozzle at the top of the tower and a water receiving tank at the bottom. and ozone supply means for dissolving and absorbing ozone from the outside into the water stored in the water receiving tank, and dissolving and absorbing ozone in the water stored in the water receiving tank, and supplying this ozonated water into the tower through a watering nozzle. In a water washing type air purifying and sterilizing device that circulates and blows indoor air between the bio-clean room and the washing tower while spraying it in the ventilation duct to remove dust and sterilize the air. It is characterized by being equipped with a cooling means for constantly maintaining the water stored in the water receiving tank at a low temperature, and an air heating means for controlling the air temperature, which is installed in the circulation ventilation path between the water washing tower and the bioclean room on the downstream side. A water-cleaning air purifying and sterilizing device.