JP2819395B2 - Air purification equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purification device,
In particular, the present invention relates to an air purification device that sterilizes and deodorizes air in a room or the like where a human lives using ozone.

[0002]

2. Description of the Related Art Ozone (O ₃ ) has a strong oxidizing power,
Since they exhibit excellent effects such as sterilization, deodorization, and decolorization, and are less toxic than chlorine-based chemicals, they are used for water purification of water and sewage and pools. Recently, an attempt has been made to apply ozone to air purification in a space where a human lives, such as a room.

[0003]

Certainly, ozone returns to oxygen (O ₂ ) by natural decomposition and has little problem of residual toxicity over a long period of time. However, if ozone exceeds a certain concentration (for example, 0.1 ppm), it is harmful to the human body. Therefore, in order to use it for air purification in a space where a human lives, such as a room, a means for almost completely removing excess ozone is used. It is necessary to take it at the same time. For this reason, excess ozone has been removed using a filter mainly composed of activated carbon.However, not only is the efficiency of decomposition of ozone by the filter low, but also when ozone is accumulated at a high concentration in activated carbon. Due to the danger of heat generation and explosion, it was hardly a practical means of removing ozone. In addition, a method has been proposed in which ozone is sterilized intensively in the absence of humans and the room is allowed to enter after surplus ozone has completely disappeared due to natural decomposition, ventilation, etc. In addition to this, there was a problem in that safety confirmation measures were required to prevent accidents.

The present invention has been devised in view of the conventional problems described above, and provides a highly safe air purifying apparatus capable of substantially completely removing excess ozone simultaneously with sterilization by ozone. Is to make it happen.

[0005]

In order to achieve the above object, an air purifying apparatus according to the present invention comprises: an intake port for taking in outside air into the apparatus; an exhaust port for discharging air inside the apparatus to the outside; An air purification device comprising an air passage communicating between an exhaust port and the intake port, and an ozone generation lamp and an ozone depletion lamp arranged in the middle of the air passage. A plurality of lamp units each including at least one of a generation lamp and an ozone annihilation lamp are connected and formed, and the ozone generation lamp and the ozone annihilation lamp are further connected to the intake port side of the ventilation path. And a control circuit for sequentially turning on and off in a pulsed manner toward the exhaust port side.

It is desirable to dispose a catalyst for promoting the decomposition of ozone by the lamp near the ozone annihilation lamp. Examples of the catalyst include a mixture of TiO ₂ and Ag ₂ O, a mixture of TiO ₂ and CuO, and MnO ₂ . These catalysts are at least SiO ₂ and A
It is desirable that the carrier is held by a carrier made of glass containing l ₂ O ₃ and that the carrier is arranged near the ozone-extinguishing lamp. Further, a sensor for detecting the ozone concentration is disposed in the middle of the ventilation path, and selection of turning on or off of each ozone generating lamp and ozone extinguishing lamp or adjustment of the output is performed in accordance with an output signal from the sensor. A control circuit for performing the control may be provided.

[0007]

As described above, the ozone generation lamp and the ozone depletion lamp are provided in the ventilation path provided in the apparatus, so that the excess ozone can be decomposed in parallel with sterilization and deodorization using ozone. Becomes possible. By adjusting the number and ratio of the installed ozone generating lamps and ozone extinguishing lamps, their outputs, and the like, it is possible to substantially completely sterilize and deodorize and decompose excess ozone. In addition, since a plurality of lamp units are connected to each other to form an air passage, the number and type of lamp units to be connected (composition ratio of built-in lamps)
By appropriately selecting the desired sterilization and
A deodorizing effect and a decomposition effect of surplus ozone can be realized. In addition, a control circuit is provided for sequentially pulsing the ozone generation lamp and the ozone annihilation lamp from the intake port side to the exhaust port side of the ventilation path, so that the electric field moves from the intake port to the exhaust port. Is formed. If a catalyst for promoting ozone decomposition is arranged near the ozone annihilation lamp, the efficiency of decomposing excess ozone can be further increased.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a vertical sectional view of an air purification device according to the present invention. This air purification device 10 is formed by vertically stacking three lamp units. First, the first lamp unit 12 located at the uppermost layer is configured by arranging two ozone elimination lamps 16 and four catalyst units 20 in a first housing 14 having a substantially rectangular parallelepiped shape. An exhaust port 28 is formed at the right end of the upper surface 12a of the first lamp unit, and a first air inlet 30 is formed at the left end of the lower surface 12b.
Are formed.

Second lamp unit 32 located in the middle layer
A lamp 16 for extinguishing ozone in a second housing 34;
The catalyst unit 20 and the ozone generation lamp 38 are arranged one by one. A first air supply pipe 42 projects from the left end of the upper surface 32a of the second lamp unit 32, and a second air inlet 44 is formed at the right end of the lower surface 32b.

Third lamp unit 4 located at the lowest layer
6 is configured by arranging two ozone generating lamps 38 in a third housing 48. Also, the third lamp unit 46
A second air supply pipe 54 protrudes from the right end of the upper surface 46a, and an intake port 56 is formed on the left end of the lower surface 46b.

A first air supply pipe 42 of a second lamp unit 32 is inserted into the first air inlet 30 of the first lamp unit 12, and the second lamp unit 32
The second air inlet 44 of the third lamp unit 4
No. 6 second air supply pipe 54 is inserted. A connecting pipe 58 is inserted into each of the first air pipe 42 and the second air pipe 54, and a flange 58 of the connecting pipe 58 is provided.
One side between each lamp unit is supported by a and 58b. Further, a leg member 60 is disposed on the opposite side of each connecting tube 58, and the other side between the lamp units is supported via the leg member 60. Between the first air supply pipe 42 and the connection pipe 58, and between the second air supply pipe 54 and the connection pipe 58
A rubber seal member 62 is interposed between the lamp units to ensure airtightness between the lamp units. As a result, the first lamp unit 1 in the stack of each lamp unit starts from the inlet 56 of the third lamp unit 46, passes through each air supply pipe and the air inlet, and then enters the first lamp unit 1.
An airtight air passage rising in a zigzag manner toward the second exhaust port 28 is formed.

The left side surface 12c of the first lamp unit 12
The right side surface 12d, the left side surface 32c and the right side surface 32d of the second lamp unit 32, and the left side surface 46c, the right side surface 46d and the lower surface 46b of the third lamp unit 46 are formed by a pair of substantially U-shaped frame members 64. (Only one frame member 64 is shown in FIG. 1). Then, the upper surface 12a of the first lamp unit 12
A pair of upper frame members 66 having a substantially L-shaped cross section are placed on both left and right ends of the lamp unit, and the upper frame members 66 are fixed to the frame members 64 via bolts 68, thereby connecting the respective lamp units. Has been enhanced.

As shown in FIG. 2, the ozone generating lamp 38 has an airtight container 70 formed by bending an elongated glass tube into a substantially U-shape, and hermetically sealing the openings at both ends. The airtight container 70 includes a pair of electrodes 72, 72 disposed at both ends, respectively, and lead wires 74, 74 connected to the electrodes 72, 72. The airtight container 70 is filled with an ultraviolet radiation gas mainly composed of Ar and Hg. The electrodes 72, 72 are made of tungsten, and the distal end is exposed in the airtight container 70, and the proximal end is buried in the sealing portion 70a. The lead wires 74, 74 are made of a dumet wire, one end of which is buried in the sealing portion 70a and connected to the base end of the electrode 72, and the other end is led out of the airtight container 70 and is connected to an external power source. Connected to. The hermetic container 70 is made of quartz glass and has a property of transmitting ultraviolet light having a wavelength of 170 nm or more. When a voltage is applied to the ozone generating lamp 38 via the lead wires 74, a discharge is generated between the two electrodes 72, 72, and electrons collide with the ultraviolet radiation gas to emit light of various wavelengths. Ultraviolet radiation is emitted to the outside. The wavelength of the emitted ultraviolet light is extremely wide,
Ultraviolet light having a wavelength of less than 220 nm (particularly 185 nm) acts on oxygen in the air to generate ozone.

On the other hand, the ozone depleting lamp 16
Has almost the same configuration as the ozone generation lamp 38, and differs only in the composition of the glass tube constituting the airtight container. That is, the ozone extinction lamp 16
The airtight container 70 has an ozone generating action by mixing impurities such as titanium oxide into quartz glass.
It is formed of a glass tube made of ozone-less quartz glass having a property of blocking ultraviolet rays of less than 0 nm. Therefore, when a voltage is applied through the lead wires 74 and 74 to generate a discharge in the hermetic container 70, ultraviolet rays of various wavelengths are generated in the hermetic container 70, similarly to the ozone generating lamp 38. However, ultraviolet rays having a wavelength having an ozone generating action are not radiated to the outside.

Not only the above quartz glass but also a hard or soft ultraviolet transmitting glass is used as a main material, and by adjusting the amount of impurities such as titanium oxide and iron oxide to be added thereto, the ultraviolet light transmitted therethrough is controlled. The wavelength range is controlled (when the amount of impurities to be added is large, short-wavelength ultraviolet rays are difficult to transmit), thereby forming an airtight container 70 for the ozone generating lamp 38 and an airtight container 70 for the ozone eliminating lamp 16. May be.

The ozone-extinguishing lamp 16 and the ozone-generating lamp 38 are mounted on a rectangular plate 76 as shown in FIG.
0a is fixed, and the plate 76 is attached to the back of each lamp unit (the back 12 of the first lamp unit 12).
e, the rear surface 32e of the second lamp unit 32, and the rear surface 46e) of the third lamp unit 46 are fitted and fixed to a lamp engaging window formed in the rear surface. A silicone rubber sealing material 7 is provided on the back surface of each plate 76 and the back surface of the lamp unit.
The lamp substrate 80 is adhered with the lamp 8 interposed therebetween to ensure airtightness around the lamp. Lead wire 7 for each lamp
4 penetrates the plate 76 and the lamp substrate 80,
It is fitted into a socket 84 protruding from one surface of the control board 82. Each lamp is connected to an external power supply via the socket 84. On the other surface of the control board 82, a power supply circuit 85, a control circuit 86 for controlling turning on / off of a lamp, or an output, and the like are mounted.

The catalyst unit 20 includes at least Si
A catalyst tube obtained by mixing a catalyst for ozonolysis mainly composed of TiO ₂ and Ag ₂ O into a support made of a low-melting glass containing O ₂ and Al ₂ O ₃ , forming the mixture into a tubular shape, and firing it. A large number of 87s are connected vertically and horizontally by means such as fusion. In addition, each catalyst unit 20 is fixed to a predetermined location in the first lamp unit 12 and the second lamp unit 32 by means such as bonding. in this way,
Since the catalyst is mixed in the carrier to form the catalyst tube 87, the catalyst is firmly held by the carrier, and there is no risk of peeling or falling off. In FIG. 1, the first
A pair of catalyst units 20 are arranged on both sides of the ozone annihilation lamp 16 in the lamp unit 12, respectively, and one catalyst unit 20 is arranged on one side of the ozone annihilation lamp 16 in the second lamp unit 32. Although an example is shown, the number of catalyst units 20 to be installed is not limited to this, and can be increased or decreased as needed.

When the power is turned on, the air purifying device 1 is turned on.
When each lamp of No. 0 is turned on, the air in each lamp unit expands and rises due to the heat radiation effect from the lamp, so that the air in the unit is naturally discharged to the outside from the exhaust port 28 of the first lamp unit 12. At the same time, outside air flows into the unit from the inlet 56 of the third lamp unit 46. Then, the air taken into the third lamp unit 46 from the intake port 56 is first subjected to sterilization and deodorization treatment using ozone generated by the action of the ozone generation lamp 38.

Next, the air that has risen into the second lamp unit 32 through the second air supply pipe 54 and the second air inlet 44 is also generated by the ozone generated by the action of the ozone generating lamp 38 there. After being subjected to the sterilization and deodorization treatment, it is irradiated with ultraviolet light having ozone decomposing action (mainly, ultraviolet light having a wavelength of 253.7 nm) supplied from the ozone depleting lamp 16 and has a catalytic action when passing through the catalyst unit 20. Thereby, the excess ozone is decomposed.

Further, the air that has risen into the first lamp unit 12 through the first air supply pipe 42 and the first air inlet 30 is used to decompose ozone supplied from the two ozone annihilating lamps 16. And by passing through the four catalyst units 20,
After the excess ozone is decomposed more carefully, it is discharged from the exhaust port 28 to the outside of the apparatus.

The ultraviolet light having a wavelength of 220 to 280 nm emitted from the ozone generating lamp 38 and the ozone extinguishing lamp 16 not only exerts ozone decomposing action,
Since it itself exerts a strong bactericidal effect,
Bacteria that are not killed by ozone can also be eliminated by this UV killing. Therefore, purification such as sterilization and deodorization is completed, and clean air from which ozone harmful to the human body is almost completely removed is supplied from the exhaust port 28 to the outside.

The ozone generating lamp 38 emits not only ultraviolet rays having a wavelength which exerts an ozone generating action but also ultraviolet rays having a wavelength which exerts an ozone depleting action. Although it is decomposed, the nascent oxygen (O) generated during this decomposition also has a high bactericidal action, so that the bactericidal efficiency by the ozone generating lamp 38 can be maintained at a constant level.

Further, since the low-melting-point glass containing SiO ₂ and Al ₂ O ₃ is employed as a carrier of the catalyst for promoting the decomposition of the excess ozone as described above, the efficiency of the ozone decomposition by the catalyst can be improved. it can. This is A
This is because when g ₂ O is reduced by the action of TiO ₂ and ultraviolet rays to release O ⁻ , SiO ₂ and Al ₂ O ₃ serve as a source of charge and increase the quantum number. In the above description, an example was shown in which a catalyst was mixed in a low-melting glass containing SiO ₂ and Al ₂ O ₃ , and then fired to form a catalyst tube 87. Therefore, the catalyst tube 87 may be formed by forming a glass tube in advance with low-melting glass containing SiO ₂ and Al ₂ O ₃ and applying a catalyst to the surface of the glass tube. In this case, since the entire surface of the carrier is covered with the catalyst, there is an advantage that the contact area with air is increased.

As shown in FIG. 1, it is desirable to provide a sensor 88 for detecting the ozone concentration near the exhaust port 28 in the first lamp unit 12 from the viewpoint of ensuring safety. This sensor 88 is connected to the control circuit 86,
In accordance with the output signal from the sensor 88, the switching between ON / OFF and the output of each of the ozone annihilation lamps 16 and the ozone generation lamps 38 are adjusted. For example, when the sensor 88 detects ozone having a concentration higher than the set value, based on a command from the control circuit 86, the whole or a part of the ozone generating lamp 38 is turned off, or each ozone generating lamp is turned off. The output of 38 is reduced to reduce the amount of ozone generated. Alternatively, based on a command from the control circuit 86, the lighting number of the ozone extinction lamp 16 is increased,
The output of each ozone extinction lamp 16 is raised to improve the ozone decomposition efficiency.

The air purifying apparatus 10 includes a first lamp unit 12 having a pair of ozone eliminating lamps 16 built therein.
And the ozone generating lamp 38 and the ozone extinguishing lamp 1
Lamp units 32 each having one built-in 6
And a third lamp unit 46 containing a pair of ozone generating lamps 38 connected to each other to form an air passage, but the combination of the lamp units is not limited to this. For example, if it is desired to enhance the ozone extinction effect in order to ensure safety, a lamp unit having only the ozone extinction lamp 16 may be used instead of the second lamp unit 32. At this time, if the shape of the housing and the position of the lamp are shared, the first lamp unit 12, the third lamp unit 46 and the socket 8
4 can be realized. The number of lamps incorporated in each lamp unit is not limited to two, and lamp units incorporating one or three or more lamps may be connected. Further, the number of lamp units to be connected is not limited to three, and an arbitrary number of lamp units can be connected as needed.

In the above description, the air inside the device is raised by the heat radiation effect of each lamp, thereby taking in and exhausting the outside air. However, by providing a fan at an appropriate place in the device, the air is forcibly discharged. A stream may be formed. Alternatively, based on a command from the control circuit 86, each lamp is sequentially turned on and off in a pulsed manner from the intake port 56 to the exhaust port 28 along the ventilation path, and the electric field moves to change the lamp from the intake port 56 to the exhaust port 28. It may be configured to form a flow of air toward.

As a catalyst for promoting the decomposition of ozone by the ozone annihilation lamp 16, the above-mentioned TiO ₂ and Ag ₂
In addition to the mixture with O, for example, a mixture of TiO ₂ and CuO, MnO _{2 and the} like correspond. The method of arranging the catalyst is not limited to the above. For example, the catalyst may be fixed on the surface of a wire mesh made of stainless steel or the like via a suitable binder such as low-melting glass containing SiO ₂ and Al ₂ O _3. This may be fixed in the vicinity of the ozone annihilation lamp by an appropriate method.

[0028]

In the air purifying apparatus according to the present invention,
Since the ozone generation lamp and the ozone depletion lamp are arranged in the middle of the ventilation path, it is possible to decompose excess ozone in parallel with sterilization and deodorization using ozone. For this reason, it can be used safely for purifying air in a room or the like where a person lives. In addition, since a plurality of lamp units are connected to each other to form an air passage, a desired sterilization / deodorizing effect and excess ozone can be obtained by appropriately selecting the number and type of lamp units to be connected (composition ratio of built-in lamps). Can be easily achieved. Furthermore, since a control circuit is provided for sequentially pulsing the ozone generation lamp and the ozone annihilation lamp from the intake port side to the exhaust port side of the ventilation path, air moving from the intake port to the exhaust port due to the movement of the electric field. Flow can be formed. Furthermore, by disposing a catalyst that promotes the decomposition of ozone near the ozone annihilation lamp, the decomposition efficiency of surplus ozone can be further increased.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an entire air purification device according to the present invention.

FIG. 2 is a cross-sectional view showing an ozone generating lamp and an ozone extinguishing lamp used in the air purification device.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Air purification apparatus 12 1st lamp unit 16 Ozone depletion lamp 20 Catalyst unit 28 Exhaust port 30 1st air introduction port 32 2nd lamp unit 38 Ozone generation lamp 42 1st air supply pipe 44 2nd air Inlet port 46 Third lamp unit 54 Second air supply pipe 56 Inlet port 86 Control circuit 87 Catalyst pipe 88 Sensor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-230171 (JP, A) JP-A-4-146671 (JP, A) JP-A-6-63356 (JP, A) 184047 (JP, U) JP 5-51349 (JP, U) JP 6-9641 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61L 9/015

Claims (5)

(57) [Claims] 1. An air inlet for taking in outside air into the apparatus,
An exhaust port to release air inside the device to the outside, and a ventilation passage for communicating the exhaust port and the intake port, by placing the ozone generating lamps and ozone disappears lamp in the middle of the vent path An air purification device comprising:
At least one of a generation lamp and an ozone depletion lamp
Connect multiple lamp units with at least one built-in
Connected to each other, and the ozone generating lamp and
Exhaust the ozone annihilation lamp from the intake side of the ventilation path.
A control circuit is provided that blinks sequentially in a pulsed manner toward the mouth
Air purification device, characterized in that the. 2. The air purifying apparatus according to claim 1, wherein a catalyst for promoting the decomposition of ozone by the lamp is disposed near the ozone annihilation lamp. 3. The air purification device according to claim 2, wherein the catalyst is made of a mixture of TiO ₂ and Ag ₂ O or CuO, or MnO ₂ . 4. The catalyst according to claim 1, wherein at least SiO ₂ and Al
4. The air purifying apparatus according to claim 2, wherein a carrier made of glass containing ₂ O ₃ is held and the carrier is arranged near the ozone eliminating lamp. 5. A sensor for detecting an ozone concentration is provided in the middle of the ventilation path, and according to an output signal from the sensor,
The air purification device according to any one of claims 1 to 4, further comprising a control circuit for selecting ON or OFF of each of the ozone generation lamps and the ozone annihilation lamps or adjusting the output.