JPS63252555A - Air purifying and sterilizing apparatus - Google Patents

Abstract

PURPOSE:To simultaneously achieve the purification of the air of an aseptic chamber and the sterilization of collected dust, by arranging an ozone generating part also used as a discharge part, a sterilizing ozone decomposition promoting part and an electrostatic dust collection part in a changeover flow passage and making it possible to selectively operate these parts at any time. CONSTITUTION:Opening and closing changeover valves 13, 14 are provided so as to supply air to the flow passage 11 connected to a recirculation duct 10 and an ozone generating part 20 also used as a discharge part, an ozone decomposition promoting part 30 and an electrostatic dust collection part 40 are arranged in the flow passage 11 from the upstream side toward the downstream side. Then, when the flow passage 11 is opened by the changeover valves 13, 14 and a current is supplied to the ozone generating part 20 also used as the discharge part and the electrostatic dust collection part 40, the dust in the air flowing through the recirculation duct 10 is charged to be collected and only the purified air is supplied to a clean room. When the flow passage 11 is closed by the changeover valves 13, 14 and a current is supplied to the ozone generating part 20 also used as the discharge part and the ozone decomposition promoting part 30, the collected dust is sterilized by the formed activated oxygen.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an air purifying and sterilizing device, and more specifically, for example, a clean room, a bio-clean room,
This invention relates to an air purifying and sterilizing device that purifies and sterilizes the air supplied to constant-temperature or sterile rooms, operating rooms, etc.

[Prior Art] As a conventional air purifying and sterilizing device of this type, for example, the
As shown in the figure, a heater e for heat sterilization is installed near the downstream side of a dust collection filter d made of a high-performance filter installed in a flow path a connected to a circulation duct b, and After collecting the dust in the air with the sterilization heater e with the dust collecting operation stopped, the A damper C switches the parallel flow paths a and a provided in the circulation duct b.
, C to enable selective feeding, and after collecting dust in the air with a high-performance dust collecting filter d installed in each parallel flow path a, the parallel flow path a is switched to a damper. C,C
There is a known filter which is closed at the dust collecting filter d and kills bacteria and the like in the collected dust by a heating sterilization heater e disposed near the downstream side of the dust collecting filter d.

[Problems to be Solved by the Invention] However, in all conventional air purifying and sterilizing devices, the dust collecting filter d is generally formed of a Hepa filter. Therefore, this HEPA filter lacks heat resistance, and the heating temperature cannot be raised very high, resulting in a problem in that the bactericidal effect is low. In addition, since the dust collection filter d and the heater e are arranged in the parallel flow path a,
There were also problems such as increased air resistance and decreased dust collection ability.

[Means for Solving the Problems] The present invention was made in view of the above circumstances, and in order to solve the above technical problems, a discharge and ozone generation system that charges dust in the air in the cut flow path is provided. An electrostatic precipitator for collecting charged dust is provided, and an ozone decomposition promoting part for sterilization is provided. The air purifier is characterized in that air purification in clean rooms, RJN-free rooms, etc., and sterilization in collected dust can be carried out at any time or at the same time by selectively operating the part and any parallel flow paths at any time or at any time. The purpose is to provide a cleaning and sterilizing device.

That is, the first invention provides switching valves for opening and closing on the upstream and downstream sides of the flow path connected to the circulation duct, and
Between these switching valves, a discharge and ozone generation section, an ozone decomposition promotion section, and an electrostatic precipitator are arranged from the upstream side to the downstream side, and the discharge and ozone generation section and the ozone decomposition promotion section are arranged. A second aspect of the present invention provides an air purifying and sterilizing device characterized in that the air purifying and sterilizing device is formed so as to be able to operate selectively. A switching valve for opening and closing is provided so that air is supplied to only one parallel flow path, and in each of the above flow paths, from the upstream side to the downstream side, there is a discharge/ozone generating section, an ozone decomposition promoting section, and a static An object of the present invention is to provide an air purifying and sterilizing device, which is equipped with an electrostatic precipitator, and is formed so that the discharge/ozone generating section and the ozone decomposition promoting section can be operated selectively. It is something to do.

In the first and second inventions, the discharge/ozone generator may be any unit as long as it generates ozone for air purification discharge and air sterilization, but is preferably for air purification. It is preferable that the discharge and the discharge for air sterilization be selectively switchable. Further, the discharge/ozone generator may be of any type as long as it imparts an electric charge to the dust in the air, but it is preferable that the discharge electrode and each The tip of the discharge needle is composed of a discharge counter electrode having a plurality of through holes located in the center, or a plurality of wire-shaped discharge electrodes and a plurality of wire-shaped discharge electrodes arranged oppositely between these wire-shaped discharge electrodes. It is better to configure it with a plate-shaped discharge counter electrode.

Further, the electrostatic dust collector may be any type as long as it collects dust by applying a polarity different from the polarity of the dust charged in the discharge/ozone generator, but preferably Consisting of a plurality of dust collecting electrode plates parallel to each other, or consisting of mutually parallel dust collecting electrode plates and a plurality of dust collecting counter electrode plates disposed facing each other between these dust collecting electrode plates. Good.

Furthermore, the ozone decomposition promoting section may be any ozone decomposing means as long as it provides energy to decompose the ozone generated in the discharge and ozone generating section.
For example, a heating element that provides thermal energy such as an ultraviolet irradiation heater, a flasher that provides optical energy such as an ultraviolet lamp, a high-frequency oscillator that provides high-frequency energy, or a low-temperature plasma generator that provides electronic energy by applying high voltage. etc. are used.

[Effect] The above technical means works as follows.

As mentioned above, a switching valve for opening and closing is provided so that air is supplied to the flow path connected to the circulation duct, and in the flow path, from the upstream side to the downstream side, there is a discharge and ozone generation section, and an ozone decomposition part. A promoting section and an electrostatic precipitator are provided, and the discharge and ozone generating section and electrostatic precipitator are energized in the flow path communicating with the circulation duct using a switching valve, so that the ozone is fed through the circulation duct. After dust in the air is charged in the discharge/ozone generator, it is collected in the electrostatic dust collector, and only the purified air is supplied to a clean room or the like. In addition, by energizing the discharging and ozone generating section in the flow path blocked by the switching valve and operating the ozone decomposition promoting section, bacteria etc. in the dust collected in the electrostatic precipitator are removed from the ozone. It is sterilized by active oxygen generated in the decomposition promotion section. Generally, the generation of ozone is 03=02+ (0)+60Kcal-(2),
The bactericidal power depends on the decomposition reaction in equation (2), that is, the natural decomposition rate, but the right side of equation (2) recombines to become 03,
Bactericidal power decreases. Therefore, the reaction of formula (2) is promoted by applying ultraviolet rays and high voltage generated in the ozone decomposition promoting part,
03 and shortens its half-life. Therefore, the air can be purified and the collected dust can be sterilized at the same time by selectively switching the switching valve.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a sectional view showing the air purifying and sterilizing device of this invention.
The air purifying and sterilizing device of the present invention is provided with switching valves 13 and 14 for opening and closing, which communicate with and cut off the circulation duct 10, on the upstream and downstream sides of the flow path 11 connected to the circulation duct 10. A discharge/ozone generating section 20, an ozone decomposition promoting section 30, and an electrostatic precipitator 40 are arranged from the upstream side to the downstream side between .14 and 14.

Further, a circulation fan 50 is disposed on the downstream side of the circulation duct 10, and an ozone removal section 60 is connected to the upstream and downstream sides of the flow path 11 via circulation vibros 1.61, respectively.

The switching valves 13 and 14 can be automatically switched by a driving means (not shown) to communicate or block the flow path 11, and can seal the flow path 11 when it is closed. .

The discharge and ozone generating section 20 includes a plurality of pointed discharge needles 2.
1. A discharge electrode 22 protruding from 21... and each discharge needle 21
The discharge counter electrode 24 has a plurality of through holes 23, 23, . . . located at the tip thereof. In this case, the discharge electrode 22 has a plate thickness of, for example, 0.2 to 1. OAl! It is made of a strong conductive metal plate such as stainless steel, copper, brass, aluminum, etc., and also has a discharge counter electrode 24.
is made of a metal plate such as an aluminum alloy. In this case, the discharge electrode 22 is connected to the cathode of the power source, and the discharge counter electrode 24 is connected to the anode of the power source to cause negative discharge, but the polarity may be reversed to cause positive discharge. Such corona discharge is caused by a general AC power source (10
This can be done by applying a DC high voltage of -4.5 KV to -5 KV obtained by transforming and rectifying the voltage (0 V to 200 V) (at this time, the DC current is approximately 0.1 to 3 mA). Also, DC i5 [pressure -7,5KV ~ -15,0
Ozone for sterilization is generated by applying an ozone generation voltage of KV.

Further, as shown in FIGS. 1 and 2, the electrostatic precipitator 40 includes a plurality of dust collecting electrode plates 41, 41, parallel to each other, connected to the anode side of the same electrode as the discharge counter electrode 24.・It is formed in In this case, these dust collecting electrode plates 41°41...
is formed of a conductive metal plate like the discharge electrode 22 and discharge counter electrode 24 described above.

Specifically, the discharge and ozone generation section 20 and the electrostatic precipitator 40 configured as described above are connected to a high voltage pack 70 that transforms an AC power source and converts it into AC voltage. 10 is connected to the power supply side via a switching means 71 and an ill III unit 72.

Also, circulation)? The drive motor 51 of the engine 50 is connected to a power source via a control unit 72. In this case, the switching means 71 is formed of a changeover switch that selectively switches between the air cleaning resistance circuit 73 and the ozone generation circuit 74, which are arranged in parallel on the power supply side of the high-pressure pack 10, and The power supply circuit on the side of the section 40 is provided with a relay switch 15 that operates in conjunction with the switching means 71.

The ozone decomposition promoting section 30 is a discharging and ozone generating section 20.
For example, as shown in FIG.
, 30b, a low-temperature plasma generator or the like is used, which applies a high voltage between the electrodes 30b and generates a discharge, thereby imparting electronic energy. By forming the ozone decomposition promoting section 30 with a low-temperature plasma generator in this way, electronic energy from the low-temperature plasma generator is imparted to the ozone generated in the discharge/ozone generating section 20, and active oxygen is generated. This active oxygen can kill bacteria, etc. in the dust collected by the electrostatic precipitator 40.

Note that the ozone decomposition promoting unit 30 is not necessarily limited to a low-temperature plasma generator that applies electronic energy, but instead applies energy to ozone generated from the discharge and ozone generating unit 20 to generate active oxygen. Other means may also be used; for example, the heating element for imparting thermal energy may be an ultraviolet irradiation heater, the flashing element for imparting light energy may be an ultraviolet lamp, or a high-frequency oscillator for imparting high-frequency energy. good.

On the other hand, the ozone removal section 60 is provided with electromagnetic on-off valves 63.63 on the inflow side and outflow side of the circulation vibro 1.61 connected to the flow path 11, respectively.
Ozone removal tank 64 containing activated carbon in the pipe between 3
and a sterilizing fan 65 are arranged in series, and a bypass pipe 66 is arranged in parallel with the ozone removal tank 64.
Moreover, the structure is such that three-way switching valves 67, 67 are disposed at the branch part of the ozone removal tank 64 and the bypass pipe 66.

In the above embodiment, a case has been described in which activated carbon is stored in the ozone removal tank 64 of the ozone removal section 60, but it does not necessarily have to be activated carbon, and for example, metal iron oxide (divalent iron), terpenoid (CIH21+140
．． : m-9~15. p=0 to 2). In addition, an electrostatic precipitator 40 is provided in the flow path 11.
An opening 15 for replacement is provided, and an opening/closing door 16 is attached to the opening 15.

In the air purifying and sterilizing device of the present invention configured as described above, the flow path 11 is opened by the switching valves 13 and 14,
Then, an air purifying voltage (low-voltage charge) is applied to the discharge/ozone generating section 20 in the flow path 11, and the same voltage is also applied to the electrostatic precipitator 40, thereby increasing the voltage to the ozone decomposition promoting section 30. When the application is stopped, the dust in the air fed from the circulation duct 10 is charged in the discharge/ozone generator 20, and then the electrostatic collector WI! Only the air collected by the dust collecting electrode plates 41, 41, . . . of the part 40 and purified is supplied into a room such as a clean room. After cleaning the air for a predetermined period of time in this way, the flow path 11 is closed by the switching valves 13 and 14, and the ozone generation voltage (
When applying a high voltage charge (high voltage charge) and stopping the application of voltage to the electrostatic precipitator 40, the ozone decomposition promoting part 30'Ifi is activated, so that the ozone generated in the discharge and ozone generating part 20 is decomposed into ozone. It is decomposed by energy such as electrons and heat provided from the promoting section 30 to generate active oxygen.

At this time, the electromagnetic quantity m valve 63.63 of the circulation vibro 1.61 connected to the blocked flow path 11 is opened, and the three-way switching valves 67, 67 are switched to the bypass vibrator 66 side,
Then, when the sterilizing fan 65 is operated, active oxygen is circulated and supplied to the electrostatic precipitator 40, so that the active oxygen is collected on the collecting electrode plates 41, 41, etc. of the electrostatic precipitator. Bacteria, etc. in the dust are killed. After performing this sterilization action for a predetermined period of time, the three-way switching valves 67, 67 are connected to the ozone removal tank 64.
When switched to the side, ozone that was not decomposed during the sterilization process is removed from the activated carbon and gold in the ozone removal tank 64.
! The carbon dioxide gas is chemically reacted with carbon dioxide (ferrous iron), terpenoids, etc. to form carbon dioxide gas or various compounds, and then when the flow path 11 communicates with the circulation duct 10, it is sent into the room as clean air.

In the above embodiment, the discharge and ozone generating section includes discharge electrodes 22, 22, . . . having pointed discharge needles 21, 21, .
・ and the discharge counter electrode 24 having a plurality of through holes 23 , 23 . The structure is not limited to this, but for example, as shown in FIG. It can also be configured with a plurality of plate-shaped discharge pairs l4i27, 27, . . . , and space can be used more effectively. Further, in the above embodiment, a case has been described in which the electrostatic precipitator 40 is formed of a plurality of dust collecting electrode plates 41, 41, etc., but the structure is not necessarily limited to this structure. As shown in the figure, dust collection electrode plates 41, 41... are arranged at appropriate intervals, and a plurality of dust collection electrode plates 41, 41... are arranged facing each other between these dust collection electrode plates 41, 41... It is also possible to configure the dust counter electrode plate 42, 42...
Furthermore, the dust collection efficiency can be improved.

The air purifying and sterilizing device of the present invention configured as described above is used, for example, as shown in FIG. It may be one common air purifying sterilizer 1 installed in series with the air conditioner 1l 190, or as shown in FIG. It may also be used as an air purifying and sterilizing device 1.1.1.

FIG. 8 shows a sectional view of an air purifying and sterilizing device according to the second invention.
Both channels 11 are provided at the upstream branch part and the downstream branch part of the
．． Switching valves 13 and 14 for opening and closing are provided for communication and isolation with the circulation duct 10 and the circulation duct 10, and a discharge and ozone generator 20 is provided in each flow path 11 and 12 from the upstream side to the downstream side.
, an ozone decomposition promoting section 30, and an electrostatic precipitator 40 are provided. Further, a circulation fan 5 is provided on the downstream side of the circulation duct 10.
0 is provided, and an ozone removal section 60 is connected to the upstream and downstream sides of each flow path 11, -12 via a circulating vibro 1.61:62.62, respectively.

The switching valves 13.14 can be automatically switched by a driving means (not shown) to selectively communicate and cut off the flow paths 11.12, and when opened, the flow paths 11.
．． One side of 12 can be sealed.

In the air purifying and sterilizing device of the second invention configured as described above, the discharge and ozone generating section 2o includes a plurality of pointed discharge needles 2 as in the air purifying and sterilizing device of the first invention.
1. A discharge electrode 22 protruding from 21... and each discharge needle 21
A discharge counter electrode 24 having a plurality of through holes 23, 23, etc. located at the center of the tip thereof, or a third
As shown in the figure, a plurality of wire-shaped discharge electrodes 26, 26...
. . and a plurality of plate-shaped discharge counter electrodes 27, 27, . Further, the static N dust collecting section 40 also has a plurality of dust collecting electrode plates 41.4 connected to the anode side of the same electrode as the discharge counter electrode 24 in parallel with each other, similarly to the air purifying and sterilizing device of the first invention.
1... or, as shown in FIG. 4, dust collection electrode plates 41, 41 arranged at appropriate intervals.
. . . and a plurality of dust collecting counter electrode plates 42, 42, . In addition, in FIG. 8, a case is shown in which a power supply circuit having the high voltage pack 10 and the switching means 71, etc. that constitute the power supply section of the discharge and ozone generation section 20 is connected to one of the discharge and ozone generation sections 20 and the electrostatic precipitator 40. Although shown in the diagram, the discharge/ozone generating section 20 and the DI in both parallel flow paths 11 and 12
It is necessary to connect them separately to the R dust collector 40 or to selectively energize them as part of the same power supply circuit.

In the air purifying and sterilizing device of the second invention configured as described above, one flow path 11 (
the other flow path 12 (hereinafter referred to as the second flow path) is opened, and the other flow path 12 (hereinafter referred to as the second flow path) is opened, and
An air purifying voltage (low voltage charge) is applied to the discharge/ozone generator 20 in the first flow path 11, and the electrostatic precipitator 4
When the voltage is applied to the ozone decomposition promoting unit 30 and the voltage application to the ozone decomposition promoting unit 30 is stopped, the dust in the air fed from the circulation duct 10 is charged in the discharge and ozone generating unit 20, and then electrostatic Only air collected by the dust collecting electrode plates 41, 41, . . . of the dust collecting section 40 and purified is supplied into a room such as a clean room. On the other hand, a voltage for ozone generation (high voltage charge) is applied to the discharge/ozone generator 20 in the second flow path 12 that is closed by the switching valve 13 , 14 , and the voltage to the electrostatic precipitator 40 is applied. When the application of is stopped, the ozone decomposition promoting section 30 is activated, so that the ozone generated in the discharge and ozone generating section 20 is decomposed by energy such as electrons and heat provided from the ozone decomposition promoting section 30 and activated. Produces oxygen. At this time, the electromagnetic on-off valve 63.63 of the circulation vibro 2.62 connected to the blocked second flow path 12 is opened, and the three-way switching valves 67, 67 are switched to the bypass vibro 6.
When switching to the 6 side and operating the sterilizing fan 65, active oxygen is circulated and supplied to the electrostatic precipitator 40.
Due to active oxygen, the dust collection electrode plate 41.41 of the electrostatic dust collection unit...
Bacteria, etc. in the collected dust are killed. After performing this sterilization action for a predetermined time, when the three-way switching valves 67, 67 are switched to the ozone removal tank 64 side, the ozone that was not decomposed during the sterilization action is removed from the activated carbon, metal oxides, etc. in the ozone removal tank 64. The air is chemically reacted with carbon dioxide gas or various compounds by ferrous iron), terpenoids, etc., and then sent into the room as clean air when the second flow path 12 communicates with the circulation duct 10.

Further, the ozone decomposition promoting section 30 also uses electronic energy applying means such as a low temperature plasma generator, thermal energy applying means, optical energy applying means, etc., as in the first invention.

In addition, in the above embodiment, the case where there are two flow paths 11 and 12 was explained, but it is not necessarily the case that there are two parallel flow paths 11 and 12.
The present invention is not limited to this case, and as long as the structure is such that air is fed only to at least one parallel flow path, three or more parallel flow paths may be used.

[Effects of the Invention] As explained above, according to the air purifying and sterilizing device of the first invention, switching valves for opening and closing are provided on the upstream side and downstream side of the flow path connected to the circulation duct, and these A discharge/ozone generating section, an ozone decomposition promoting section, and an electrostatic precipitator are arranged between the switching valves from the upstream side to the downstream side, and
Since the discharge/ozone generating section and the ozone decomposition promoting section are formed so as to be selectively operated, the following effects can be obtained.

1) When in use, it functions as an air purifier, and when not in use, it can sterilize air, so air purification and air sterilization can be performed at any time.

2) Since the discharge and ozone generating section can perform air cleaning discharge and air sterilization discharge, it is possible to reduce the number of structural members and downsize the device.

3) Since the sterilization process is performed in a sealed parallel flow path, sterilization can be performed completely and safely.

4) Since there is no need to dispose a filter or the like in the air flow path, pressure loss can be reduced and dust collection efficiency can be improved.

5) Since there is little residual ozone, it is preferable in terms of hygiene.

Further, according to the second invention, a plurality of mutually parallel flow paths are provided in the circulation duct, a switching valve is provided so that air is supplied only to at least one flow path, and a switching valve is provided in each flow path. consists of a discharge/ozone generation section, an ozone decomposition promotion section, and an electrostatic precipitator arranged from the upstream side to the downstream side, and the operation of the discharge/ozone generation section and the ozone decomposition promotion section can be selectively operated. In addition to the above 2) to 5), the following effects can be obtained.

1) Since air cleaning and air sterilization can be performed in parallel, continuous operation of air cleaning and air sterilization is possible.

2) Since it has multiple parallel flow paths, replacing the electrostatic precipitator,
There is no need to stop operation even during maintenance and inspection, and air purification can be performed continuously.

[Brief explanation of drawings]

Figure 1 is a sectional view of the air purifying and sterilizing device of the first invention;
FIG. 3 is a perspective view showing another embodiment of the discharge and ozone generation section in this invention, and FIG. 4 is a perspective view showing another embodiment of the discharge and ozone generation section in this invention. A perspective view showing another embodiment of the discharge/ozone generating section and the electrostatic precipitator, FIG. 5 is a schematic sectional view showing an example of the ozone decomposition promoting section in the present invention, and FIGS. 6 and 7 are the same. A schematic sectional view showing how the air purifying sterilizing device of the invention is used, FIG. 8 is a sectional view of the air purifying sterilizing device of the second invention, and FIGS. 9 and 10 are schematic sectional views of the conventional air purifying sterilizing device. It is. Description of symbols (10)...Circulation duct (11, 12)...Flow path (13, 14)...Switching valve (20)...Discharge and ozone generation part (21)...Pointed Discharge needle (22)...Discharge electrode (23)...Through hole (24)...Discharge counter electrode (26)...Wire-shaped discharge electrode (21)...Plate-shaped discharge counter electrode (30)...・・Ozone decomposition promotion unit (40) ・・Electrostatic precipitator (41) ・・Dust collection electrode plate (42) ・・Dust collection return electrode plate Patent Applicant: Representative of Nippon Light Metal Co., Ltd.
Patent attorney Tomohiro Nakamura (2 others) 2
[Figure 7 Figure 9 Figure 10 Procedure in JE a (self-R) May 132, 1988 Commissioner of the Patent Office Black 1) Akio Yu 1, Display of the case 1988 Special rFm No. 86935 @ 2, Invention Name of Air Cleaning Sterilizer VI Place 3, Relationship with the Amendment Case Patent Applicant Address 3-13 Mita, Minato-ku, Tokyo! T12 name (474) Nippon Light Metal Co., Ltd. 4, agent 105 117 story 03 (433) 44205
, Date of amendment order Voluntary amendment 6, Number of inventions increased by amendment None 7, Counterprint of amendment 8, Contents of amendment In the specification of the present application, ■ In the second line from the bottom of page 11, "(in this case ...311
1A)J is replaced with "(ti lightning current at this time is approximately 0.
1~20IIl^)”. ■In the second line from the bottom of page 12, replace the word "switch" with "
"Switching" is corrected. ■In the second line from the bottom of page 13, it says [Ozone...active oxygen is 1].[Ozone is activated by giving energy!
! Correct it with "i".

Claims (14)

[Claims] (1) Switching valves for opening and closing are provided on the upstream and downstream sides of the flow path connected to the circulation duct, and between these switching valves, there is a discharge and ozone generating section from the upstream side to the downstream side, which promotes ozone decomposition. 1. An air purifying and sterilizing device comprising an electrostatic precipitator and an electrostatic precipitator, and is configured to selectively operate the discharge and ozone generating section and the ozone decomposition promoting section. (2) Claim 1, in which the discharge and ozone generating section is formed so as to be able to switch between an air purifying discharge and an air sterilizing discharge.
Air purifying and sterilizing equipment as described in Section 1. (3) A patent in which the discharge and ozone generating section consists of a discharge electrode with a plurality of pointed discharge needles protruding from it, and a discharge counter electrode with a plurality of through holes located at the center of the tip of each discharge needle. An air purifying and sterilizing device according to claim 1. (4) Claim 1 in which the discharge and ozone generating section is constituted by a plurality of wire-shaped discharge electrodes and a plurality of plate-shaped discharge counter electrodes arranged to face each other between these wire-shaped discharge electrodes. Air purifying and sterilizing equipment as described in Section 1. (5) The air purifying and sterilizing device according to claim 1, wherein the electrostatic precipitator is constituted by a plurality of mutually parallel dust collecting electrode plates. (6) Claim 1 in which the electrostatic precipitator is constituted by mutually parallel plate dust collecting electrode plates and a plurality of dust collecting counter electrode plates disposed facing each other between these dust collecting electrode plates. Air purifying and sterilizing equipment as described in Section 1. (7) The ozone decomposition promoting section is an ozone decomposition means that applies energy such as heat, light, electrons, etc. to decompose the ozone generated in the discharge and ozone generation section. Air purification sterilization device. (8) A plurality of mutually parallel flow paths are provided in the circulation duct, and a switching valve for opening and closing is provided so that air is supplied only to at least one flow path. A discharge and ozone generation section, an ozone decomposition promotion section, and an electrostatic precipitator are arranged toward the downstream side, and the discharge and ozone generation section and the ozone decomposition promotion section can be operated selectively. An air purifying and sterilizing device comprising: (9) Claim 8, wherein the discharge and ozone generating section is formed so as to be able to switch between an air purifying discharge and an air sterilizing discharge.
Air purifying and sterilizing equipment as described in Section 1. (10) A patent in which the discharge and ozone generating section is composed of a discharge electrode with a plurality of pointed discharge needles protruding from it, and a discharge counter electrode having a plurality of through holes located at the center of the tip of each discharge needle. The air purifying and sterilizing device according to claim 8. (11) Claim 8, wherein the discharge and ozone generating section is constituted by a plurality of wire-shaped discharge electrodes and a plurality of plate-shaped discharge counter electrodes arranged oppositely between these wire-shaped discharge electrodes. Air purifying and sterilizing equipment as described in Section 1. (12) The air purifying and sterilizing device according to claim 8, wherein the electrostatic precipitator is constituted by a plurality of mutually parallel dust collecting electrode plates. (13) Claim 8, in which the electrostatic precipitator is constituted by mutually parallel plate dust collecting electrode plates and a plurality of dust collecting counter electrode plates disposed facing each other between these dust collecting electrode plates. Air purifying and sterilizing equipment as described in Section 1. (14) The ozone decomposition promoting section is ozone decomposition means that applies energy such as heat, light, electrons, etc. to decompose the ozone generated in the discharge and ozone generation section. Air purification sterilization device.