JPH06190029A - Apparatus and method for air purification by using ozone in purification room - Google Patents

Abstract

PURPOSE:To provide a method and an apparatus wherein an ozone sterilization treatment of the environment in a room is performed without giving any harm to a human body while a worker exists in the room. CONSTITUTION:An arranging place of a nozzle 7 connected to an ozone generator in a purification room 6 is on the upper side of an ozone dilution region 16 positioned above a working region consisting of a space with a specified height where a worker performs an operation and discontinuity is given to ozone feeding through a timer setting or a control panel.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a hotel, a food processing factory,
The present invention relates to an ozone treatment method and apparatus used in commercial kitchens, hospitals, aseptic storages and the like.

[0002]

2. Description of the Related Art Conventionally, it has been known to use vapor phase ozone for purification of indoor air such as sterilization, suppression of microbial growth and deodorization in food processing factories, hotels and other commercial kitchens, hospitals, semiconductor factories, etc. However, if the ozone concentration in the room exceeds the allowable limit, the health of workers may be impaired.
With a device that directly generates ozone from oxygen in the air, there is a risk that NO _x is supplied together with ozone. For this reason, the purification process performed by filling the room with ozone is mainly performed at night, etc., when the worker is not in the room, and while the worker is in the room such as day and day, the ozone generator and activated carbon filter, etc. A method has been adopted in which indoor air is blower circulated by an air conditioner equipped with the above to purify ozone in the air conditioner, and ozone is adsorbed by a filter and is not released into the room.

[0003]

However, at night when the work is stopped, no working material such as workers or raw materials is left in the room, so that the viable fungus is originally small and the sterilization is not necessary. So it did not result in an effective purification treatment. Furthermore, when ozone is treated in the air conditioner without directly discharging ozone into the room, strong sterilization and deodorization cannot be performed, and there is a problem of labor and cost for attaching and detaching the activated carbon filter which is a consumable item. there were.

[0004]

In order to solve the above problems, the first aspect of the present invention is an oxygen generator 2 which separates and collects oxygen in air to generate high concentration oxygen.
And an ozone generator 1 for introducing ozone generated by the oxygen generator 2 to generate ozone, a pipe 4 for supplying the generated ozone to the purification chamber 6, and a large number of nozzles for ejecting ozone into the purification chamber 6. 7 is provided for each, and the installation height of the nozzle 7 in the purification chamber 6 is set so that ozone is the work area 1
By the time 7 is reached, it is set to the safe height position of the dilution zone 16 which is diluted below the safety standard.

As a second feature, a sensor 24 for detecting the ozone concentration in the atmosphere is provided in the ozone dilution area 16 or the working area 17 in the purification chamber 6, and the ozone in the purification chamber 6 is detected when an abnormal value of the sensor 24 is detected. An informing device 27 for informing a concentration abnormality or a control device 25 for stopping the supply of ozone to the purification chamber 6 is provided.

As a third feature, in the method of supplying ozone of a predetermined concentration into the purification chamber 6, the work area 1 in the purification chamber 6
The ozone concentration of the atmosphere in 7 is detected, and the ozone supply is stopped or restarted in response to the excess or deficiency of the ozone concentration in the working area 17 to the safety standard for human body or the required concentration for purification.

As a fourth characteristic, in the method of supplying ozone of a predetermined concentration into the purification chamber 6, the work area 1 in the purification chamber 6
It was decided to supply ozone periodically and quantitatively so as to keep the ozone concentration in the 7 atmosphere at an appropriate amount.

As a fifth feature, the pipes 4 are provided in the plurality of purification chambers 6.
In the method of branching to supply ozone separately, the ozone supply of the other purification chambers 6 is stopped during the ozone supply of the specific purification chamber 6 and the other ozone is stopped while the ozone supply of the specific purification chamber 6 is stopped. It was decided to supply ozone to the purification chamber 6.

[0009]

Function: Nozzle 7 disposed above ozone dilution area 16
The ozone released from the ozone descends while sterilizing and purifying the ozone dilution area 16 and is diluted to a concentration below the human safety standard before reaching the work area 17. If the abnormality notification device 27 or the safety control device 25 is connected to the ozone concentration sensor 24, ozone supply is continuously performed due to human operation mistakes, timer set failure, etc., and when the indoor ozone concentration exceeds a certain level. A person immediately notices this or the safety control works automatically. When the ozone supply is intermittent, the ozone concentration in the purification chamber 6 repeats increasing and decreasing within a certain range, so that the ozone generation amount in the work area 17 can be more reliably kept in an appropriate and safe state. In this case, if the timer for intermittent ozone supply is set in advance, the risk of human error is eliminated. If ozone is supplied alternately to a plurality of purification chambers 6, it is economical because one ozone generation / supply unit is sufficient even when cleaning a large number of chambers.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG.
As shown in, an ozone generator 1 is connected to an oxygen generator 2 and an air compressor 3 with an air dryer function, and an ozone discharge pipe 4 is connected. In the ozone generator 1, ozone is generated from the oxygen supplied from the oxygen generator 2, and the ozone is diluted with dehumidified and dried air sent from the air compressor 3 to increase the amount of ozone for purification through the pipe 4. It is sent to each work room 6.

The oxygen generator 2 is disclosed in Japanese Patent Laid-Open No. 58-8.
No. 1422, No. 59-160514-5, or the device shown in Japanese Utility Model Laid-Open No. 1-101624, which is a compactly improved version of these, is used. It is characterized in that it is possible to separate (about 95%) oxygen to be taken out, and it is safe because the cost is low and the nitrogen content is small.

The ozone generator 1 may be a known device for generating ozone by high-voltage discharge of oxygen in the related art, but a discharge electrode and a dielectric electrode are arranged on both sides of a dielectric and a special waveform is formed on the discharge electrode and the dielectric electrode. A new type device that applies high frequency and high voltage to cause creeping streamer discharge to generate ozone with high efficiency may be used. In this case, if the ozone generator 1 by the creeping streamer discharge is combined with the oxygen generator 2 disclosed in Japanese Utility Model Laid-Open No. 1-101624, NO _x, which is a harmful substance to a human body when ozone is converted to oxygen, is almost eliminated. The effect that it does not occur can be obtained. Also, since ozone is generated more efficiently as the air and oxygen are dried,
The air compressor 3 is equipped with the dryer function as described above.

The pipe 4 extending from the ozone generator 1 and introduced into the purification chamber 6 has a height of 2.5 to 3 from the floor of the purification chamber 6.
The nozzle 7 for ozone discharge is attached to the pipe 4 at the position m. In this case, the nozzles 7 are attached to the pipe 4 so that one nozzle is assigned to the space of 20 m ³ of the purification chamber 6 and are evenly distributed in the purification chamber 6.

The pipe 4 of the purification chamber 6 is suspended by a saddle band 11 fixed to a ceiling material 9 with screws 8 as shown in FIG. The nozzle 7 is attached vertically downward. Further, the pipe 4 may be arranged on the upper side of the ceiling material 9, and in this case, the nozzle 7 is connected to the pipe 4 via a socket 13 penetrating the ceiling material 9 as shown in FIG.

The ozone generated in the ozone generator 1 and sent to the purifying chamber 6 through the pipe 4 is the nozzle 7 described above.
Since it is released from the inside of the purification chamber 6, the height from the floor is 2.5.
It will be supplied from a position of ~ 3 m. The concentration of ozone suitable for sterilization is approximately 1 to 3 ppm or more, but when an ozone purifying process is performed while a worker is in the purification room 6 such as day and day, it is safe for the worker to be safe. Since it is dangerous to supply an ozone amount of 0.1 ppm or more, which is an allowable limit, it is impossible to fill the room with high-concentration ozone. In this case, ozone constantly self-decomposes into O ₂ and its toxicity and bactericidal power are weakened.
When supplying ozone, the ozone concentration near the nozzle 7 is approximately 3 to 5
If the ozone concentration is controlled so as to be ppm, the ozone concentration is maintained at the sterilization suitability value of 1 to 5 ppm in the upper side (safety height position) of the ozone dilution region 16 near the nozzle 7, while the ozone concentration is within the ozone dilution region 16. The concentration decreases as the temperature decreases, and the concentration is below 0.1 ppm, which is the concentration at which the worker can continuously work near the boundary line 18 with the work area 17 below the ozone dilution area 16. By adopting such an ozone supply method, the sterilization process of the fungus floating with water vapor and dust in the ozone dilution area 16 is performed without damaging the health of the worker.

If ozone is supplied intermittently without being continuously supplied, the ozone concentration in the room can be increased or decreased within a predetermined range, and the amount of ozone generated in the purifying room work area 17 can be kept in an appropriate and safe state. It will be easy. In the experiment of this example, a method of supplying for 30 minutes and stopping the supply for 60 minutes was adopted.

Table 1 shows the purification chamber 6 by the above ozone supply method.
The ozone concentration inside the ozone dilution area 16 near the nozzle 7
This is a comparison between the upper side (height: 2.5 to 3 m) and the upper side (height: 2 m) of the work area 17 near the worker's head. It should be noted that the ozone concentration of 0.03 ppm is about the same as the concentration existing in nature.

Table 1

Table 2 summarizes the results of ozone purification treatment in each chamber by the above supply method for general live bacteria, Escherichia coli, and fungi.

Table 2

Regarding the intermittent supply of ozone described above (supplied for 30 minutes and stopped for 60 minutes), the purification target chamber 6 is divided into A block, B block and C block as shown in FIG. If the blocks A to B and then the blocks B to C are continuously circulated in order, it is economical because one ozone generation / supply unit is sufficient as the ozone supply source. Further, in the above ozone treatment method, if the ozone supply amount and the supply time are set to be an automatic control system that operates as set in advance, the ozone concentration in the work area 17 will not exceed the human body safety standard of 0.1 ppm. Absent.

At a position near the upper side of the working area 17 (height: about 2 m) on the wall in the purification chamber 6, the ozone concentration is detected as a safety device in consideration of a human error and a timer device failure. A sensor 24 is installed, and the sensor 24 is connected via a conductive wire 26 to a control panel 25 that stops operation depending on the ozone concentration. With this series of devices, the ozone supply is stopped when the ozone concentration in the work area 17 of the purification chamber 6 exceeds a preset value.
Further, the sensor 24 may be connected to a notification device 27 that notifies a danger by means such as a lamp and a buzzer.

In addition to day and day, it is also possible to continuously carry out the ozone purification treatment even during the nighttime when there are no workers. In this case, as described above, since the amount of living bacteria is originally small at night, the ozone supply amount is about 30% as compared with daytime and daytime.

[0024]

According to the present invention configured as described above,
The following effects can be obtained. (1) Ozone released from the upper side of the ozone dilution area falls while performing sterilization and purification treatment, and is diluted to a concentration below the human safety standard by the time it reaches the work area, which impairs the health of people in the room. It is possible to perform ozone treatment during the working hours such as day and day without fear. For this reason, a large number of general viable bacteria and the like are generated from humans and living things, and the ozone treatment can be performed when the indoor air pollution degree is advanced and the indoor purification treatment is highly required. In addition, since ozone is directly released into the room, it has a stronger sterilization than conventional ozone treatment methods during working hours.
Deodorization processing etc. becomes possible. (2) By connecting an ozone concentration sensor and an abnormality notification device or control device, even if the indoor ozone concentration exceeds a certain level due to human error or a timer set failure, the danger can be perceived by the local government and safety control can be performed. Automatically works to ensure the health and safety of people in the room. (3) By providing intermittent ozone supply, it becomes easy to maintain an appropriate amount of ozone in the purification chamber work area in a safe state, and by supplying ozone to multiple chambers alternately, It is possible to save the number of units and the cost of electricity used. (4) If intermittent ozone supply is performed periodically and quantitatively by automatic operation with a timer set in advance, there is no human error and there is no risk of the indoor ozone amount exceeding the set concentration, and labor costs are saved. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is an enlarged side view showing an embodiment of a nozzle mounting portion.

FIG. 4 is an enlarged side view showing another embodiment of the nozzle mounting portion.

FIG. 5 is a plan view showing grouping of the purification chambers.

[Explanation of symbols]

 1 Ozone generator 2 Oxygen generator 4 Piping 6 Purification room 7 Nozzle 16 Ozone dilution area 17 Working area 24 Ozone concentration sensor 25 Safety control device 27 Notification device

[Table 1]

[Table 2]

Claims (5)

[Claims] 1. An oxygen generator (2) that separates and collects oxygen in the air to generate a high concentration of oxygen, and introduces the oxygen generated by the oxygen generator (2) to generate ozone. An ozone generator (1), a pipe (4) for supplying the generated ozone to the purification chamber (6), and a large number of nozzles (7) for ejecting ozone into the purification chamber (6) are provided respectively, and the purification chamber (6) A purification chamber in which the installation height of the nozzle (7) in () is set to be equal to or higher than the safety height position of the dilution area (16) where ozone is diluted to a safety standard or less before reaching the work area (17) of the worker. Air purifier with ozone. 2. The ozone dilution area (16) in the purification chamber (6)
Alternatively, a notifying device (not shown) that provides a sensor (24) for detecting the ozone concentration in the atmosphere in the working area (17) and notifies the ozone concentration in the purification chamber (6) when an abnormal value of the sensor (24) is detected ( 27) or an air purifying apparatus using ozone in the purifying chamber according to claim 1, further comprising a control device (25) for stopping the supply of ozone to the purifying chamber (6). 3. A method of supplying a predetermined concentration of ozone into the purification chamber (6), comprising a work area (17) in the purification chamber (6).
Working environment (17)
A method of purifying ozone in a purifying chamber, which stops or restarts the supply of ozone in response to the excess or deficiency of the ozone concentration in the human body to the safety standard for human body or the required concentration for purification. 4. A method of supplying ozone having a predetermined concentration into the purification chamber (6), the work area (17) in the purification chamber (6).
A method for purifying ozone in a purifying chamber that periodically and intermittently supplies ozone intermittently so as to maintain an appropriate amount of ozone concentration in the atmosphere. 5. A method of branching a pipe (4) to a plurality of purification chambers (6) to separately supply ozone, wherein during the supply of ozone to a specific purification chamber (6), the other purification chambers (6) The ozone supply is stopped, and the ozone supply to the other purification chamber (6) is performed while the ozone supply to the specific purification chamber (6) is stopped.
Purification method using ozone in the purification room.