JP5098885B2 - Charging device and air treatment device - Google Patents

Description

  The present invention relates to a charging device that charges floating particles such as dust in the air to be treated, and an air processing device that collects charged dust, and in particular, a technique for reliably charging floating particles such as dust in a small space. It is about.

As a conventional air treatment device, Patent Literature 1 discloses an air purification device in which a main body having an electric dust collection unit and a charging unit having a charging unit are detachable. In this air purification device, the ions generated by the charging unit are discharged into the room and combined with the dust floating in the air to charge the dust, and the dust is sucked into the main body of the air purification device by a fan and collected I try to collect in the department.
JP 2006-116492 A

  However, in the apparatus of Patent Document 1, dust is ionized in the indoor space, and therefore, the dust may adhere to the wall of the room and the wall may become dirty before being taken into the electric dust collector of the apparatus. .

  Further, in the method of charging dust by diffusing ions as in Patent Document 1, a large space is generally required. Therefore, if it is attempted to complete the charging and collection of the dust only within the casing of the air purification device, the casing becomes large, and it is difficult to put it into practical use.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a charging device, a charging method, an air treatment device, and an air treatment method that employ a method of diffusing ions generated in a charging unit. It is only possible to complete the charging and collection of dust, and to prevent the enlargement of the apparatus.

1st invention is a charging device provided with the charge part (20) which charges the floating particle | grains in to-be-processed air, Comprising: The said charge part (20) is the 1st charge part (20a) of a collision charge system, and The second charged portion (20b) of the diffusion charge system is provided, and the number of discharge locations of the first charged portion (20a) is different from the number of discharge locations of the second charged portion (20b).

In the first invention, the ratio between the collision charging current and the diffusion charging current can be easily adjusted.

In the first invention, the number of discharge locations of the second charged portion (20b) is greater than the number of discharge locations of the first charged portion (20a).

In the first invention, the value of the diffusion charge current can be easily made different from the value of the collision charge current.

According to a second invention, in the first invention, the interval between the discharge portions of the second charged portion (20b) is ¼ or more and ½ or less of the interval between the discharge portions of the first charged portion (20a). It is characterized by being.

In the second aspect of the invention , the number of discharge points of the second charging unit that performs diffusion charging is two to four times the number of discharge points of the first charging unit that performs collision charging. Therefore, the value of the diffusion charge current can be made different from the value of the collision charge current.

A third aspect of the invention is a charging device including a charging unit (20) for charging suspended particles in the air to be treated, wherein the charging unit (20) includes a first charging unit (20a) of a collision charging system. The second charging part (20b) of the diffusion charging method is provided, and the number of discharge parts of the charging part located on the upstream side in the air flow direction is different from the number of discharge parts of the charging part located on the downstream side . .

In the third aspect of the invention , even when the first charged portion is located upstream and the second charged portion is located downstream in the air flow direction, the second charged portion is located upstream and located downstream. Even when the first charging unit is located, the ratio of the collision charging current and the diffusion charging current can be adjusted.

In the third invention, the number of discharge locations of the second charged portion (20b) is greater than the number of discharge locations of the first charged portion (20a) .

In the third aspect of the invention , the value of the diffusion charge current can be made different from the value of the collision charge current.

According to a fourth invention, in the third invention, the interval between the discharge portions of the second charged portion (20b) is ¼ or more and ½ or less of the interval between the discharge portions of the first charged portion (20a). It is characterized by being.

In the fourth aspect of the invention , the number of discharge points of the second charging unit that performs diffusion charging is two to four times the number of discharge points of the first charging unit that performs collision charging. Therefore, the value of the diffusion charge current can be made different from the value of the collision charge current .

According to a fifth invention , in any one of the first to fourth inventions , the first charging portion (20a) is disposed on the upstream side with respect to the flow direction of the air to be treated, and the second charging device is disposed on the downstream side. The charging portion (20b) is arranged.

In the fifth invention , the air to be treated first passes through the first charged portion (20a) and then passes through the second charged portion (20b). Here, when comparing the first charging unit (20a) of the collision charging method and the second charging unit (20b) of the diffusion charging method, the charging amount is advantageous when the charging time is short. As the charging time becomes longer, diffusion charging becomes advantageous. For this reason, if the upstream side is the collision charging system and the downstream side is the diffusion charging system, it is easy to obtain a sufficient charge amount.

According to a sixth invention, in the fifth invention , the discharge electrode (25a) of the first charged portion (20a) and the discharge electrode (25b) of the second charged portion (20b) are formed by an integrated discharge electrode (25). The counter electrode (26a) of the first charging unit (20a) is arranged on the upstream side of the airflow with respect to the discharge electrode (25), and the counter electrode of the second charging unit (20b) is on the downstream side of the airflow (26b) is arranged.

In the sixth aspect of the invention , the discharge electrode (25a) of the first charged portion (20a) and the discharge electrode (25b) of the second charged portion (20b) are integrated, and the first charged portion (20a) side is the first. Since it is arranged on the upstream side of the two charged parts (20b) side, a sufficient charge amount can be obtained while simplifying the configuration of the discharge electrode (25).

According to a seventh invention, in the sixth invention , the integrated discharge electrode (25) comprises the first discharge part (25a) constituting the discharge electrode (25a) of the first charge part (20a) and the second charge. A second discharge part (25b) constituting a discharge electrode (25b) of the part (20b), a counter electrode (26a) of the first charge part (20a) and a counter electrode of the second charge part (20b) (26b) is constituted by an integrated counter electrode (26), and the integrated counter electrode (26) is disposed closer to the first discharge portion (25a) than the second discharge portion (25b). It is a feature.

In the seventh invention , the counter electrode (26) is integrated, and the first discharge part (25a) located upstream from the second discharge part (25b) located downstream in the flow direction of the air to be treated. Since the counter electrode (26) is disposed in the vicinity of the first electrode, the configuration can be simplified, and collision charge is likely to occur between the first discharge part (25a) and the counter electrode (26). The diffusion charge is likely to occur between the second discharge part (25b) and the counter electrode (26).

According to an eighth invention , in any one of the first to seventh inventions , the counter electrode (26) of the second charged portion (20b) is a rod-shaped electrode having a polygonal cross section whose apex angle is an obtuse angle. It is characterized by being composed.

A ninth invention is characterized in that, in any one of the first to seventh inventions , the counter electrode (26) of the second charged portion (20b) is constituted by a rod-like electrode having a circular cross section. Yes.

In the eighth and ninth inventions , since the electric field does not concentrate on the edge in the counter electrode (26), ions are likely to diffuse.

According to a tenth aspect of the present invention, in the eighth or ninth aspect, the diagonal dimension or diameter dimension of the counter electrode (26) of the second charged portion (20b) is between the discharge electrode (25) and the counter electrode (26). It is characterized in that it is 1/5 or less of the dimension and larger than zero (mm).

In the tenth aspect of the invention , since the diameter or diagonal dimension of the counter electrode (26) is set to a sufficiently small dimension relative to the dimension between the discharge electrode (25) and the counter electrode (26), the counter electrode The surface area of (26) is reduced and ion absorption is suppressed.

In an eleventh aspect based on any one of the eighth to tenth aspects, a space (S1) on the opposite side to the discharge electrode (25) with respect to the counter electrode (26) of the second charged portion (20b). It is characterized by being provided.

In the eleventh aspect of the invention , the electric lines of force that wrap around the back side of the counter electrode (26) (the space (S1) opposite to the discharge electrode (25)) are formed by the discharge electrode (25) and the counter electrode (26). The When ions fly along the straight line of electric force between the discharge electrode (25) and the counter electrode (26), they are easily absorbed by the counter electrode (26), but the lines of electric force that wrap around the back side of the counter electrode (26) Flying along the counter electrode (26) makes it difficult to be absorbed by the counter electrode (26). Therefore, a diffusion component of ions is generated in this space (S1), and diffusion charging is performed.

In a twelfth aspect of the invention according to any one of the eighth to tenth aspects of the invention , a space (S2) is provided in the entire outer periphery of the counter electrode (26) of the second charged portion (20b). It is said.

In the twelfth invention, similarly to the eleventh invention, electric lines of force that wrap around the back side of the counter electrode (26) are also formed, so that a diffusion component of ions is generated in the space (S2), and the diffusion charge is reduced. Done.

A thirteenth invention is characterized in that, in the eleventh or twelfth invention , the counter electrode (26) of the second charging portion (20b) is disposed in an air flow path through which the air to be treated flows.

In the thirteenth aspect, since the counter electrode (26) of the second charged portion (20b) is disposed in the air flow path through which the air to be treated flows, the discharge electrode (25) of the second charged portion (20b) The ions that should jump out of the light and enter the counter electrode (26) are affected by the airflow, and are easily diffused into the air without jumping into the counter electrode (26).

14th invention presupposes the air processing apparatus provided with the charge part (20) which charges the dust in to-be-processed air, and the electrical dust collection part (30) which collects the charged dust.

Then, the air treatment apparatus, the charge section (20), the first charge section of the impact charging technique and (20a), the invention from a first and a second charge section of the diffusion charging technique (20b) of the 13 It is characterized by being comprised by any one of these charging devices.

In the fourteenth aspect of the invention , since the air treatment apparatus is configured by using both the impact charging method and the diffusion charging method, the floating particles such as dust in the air are ordered from the micron order (1 μm or more) to the submicron order. Capable of being efficiently charged and captured up to (less than 1 μm). Further, by using the collision charging method and the diffusion charging method in combination, the charging of dust or the like can be completed in the casing of the device, and the device can be downsized.

According to the present invention, the charging unit (20) has the first charging unit (20a) of the collision charging method and the second charging unit (20b) of the diffusion charging method, and the collision charging method is used as the diffusion charging method. Are also used together, so that the space required for charging the suspended particles in the second charged portion (20b) can be reduced. In addition, since the space for diffusion charging can be reduced, charging of floating particles such as dust can be completed within the casing of the apparatus. Furthermore, in general, the impact charging method is easy to charge micron-order particles, and the diffusion charge method has a characteristic to easily charge smaller sub-micron order particles, so only the impact charging method or the diffusion charging method is used. Compared to a charging device that uses only the above, it is possible to charge particles having a wide range of particle sizes .

In addition, the ratio of the collision charging current and the diffusion charging current can be easily adjusted so that the number of discharge locations of the first charging portion (20a) is different from the number of discharge locations of the second charging portion (20b). Therefore, the generation of ozone can be easily suppressed.

In addition, since the number of discharge locations of the second charged portion (20b) is larger than the number of discharge locations of the first charged portion (20a), the value of the diffusion charge current is set to the value of the collision charge current. The generation of ozone can be suppressed.

According to the second aspect of the present invention , diffusion charging is performed by setting the interval between the discharge portions of the second charged portion (20b) to ¼ or more and ½ or less of the interval between the discharge portions of the first charged portion (20a). The number of discharge locations where the charging is performed is set to be twice to four times the number of discharge locations where the impact charging is performed. Therefore, the value of the diffusion charge current is made different from the value of the collision charge current, and the generation of ozone can be suppressed.

According to the third aspect of the invention , the number of discharge portions of the charged portion located on the upstream side in the air flow direction is different from the number of discharge portions of the charged portion located on the downstream side. The amount of ozone generated can be adjusted by adjusting the ratio of the diffusion charge current.

In addition, since the number of discharge locations of the second charged portion (20b) is larger than the number of discharge locations of the first charged portion (20a), the value of the diffusion charge current is set to the value of the collision charge current. Can be different. Therefore, generation of ozone can be suppressed.

According to the fourth invention , the interval between the discharge portions of the second charged portion (20b) is ¼ or more and ½ or less of the interval between the discharge portions of the first charged portion (20a). The number of discharge locations where charging is performed is two to four times the number of discharge locations where impact charging is performed. Therefore, the value of the diffusion charge current is made different from the value of the collision charge current, and the generation of ozone can be suppressed.

According to the fifth aspect of the invention , the first charged portion (20a) is disposed upstream with respect to the flow direction of the air to be treated, and the second charged portion (20b) is disposed downstream. The air to be treated first passes through the first charged part (20a) and then passes through the second charged part (20b). Here, when comparing the first charging unit (20a) of the collision charging method and the second charging unit (20b) of the diffusion charging method, the charging amount is advantageous when the charging time is short. As the charging time becomes longer, diffusion charging becomes advantageous. For this reason, when the collision charging method is used on the upstream side and the diffusion charging method is used on the downstream side, it is easy to obtain a sufficient charge amount, and the efficiency of the charging unit (20) as a whole is improved.

According to the sixth invention , the discharge electrode (25) of the first charged portion (20a) and the discharge electrode (25) of the second charged portion (20b) are integrated, and the first charged portion (20a) side is formed. Is arranged on the upstream side of the second charged part (20b) side, so that the configuration of the discharge electrode (25) can be simplified and the charged part (20) as a whole can be obtained by obtaining a sufficient amount of charge. Can improve the efficiency.

According to the seventh aspect of the invention , the counter electrode (26) is integrated, and the first discharge part (upstream side) of the second discharge part (25b) located downstream of the flow direction of the air to be treated ( Since the counter electrode (26) is arranged in the vicinity of 25a), it is possible to simplify the configuration, and between the first discharge section (25a) on the upstream side and the counter electrode (26). Impact charging is likely to occur, and diffusion charging is likely to occur between the downstream second discharge portion (25b) and the counter electrode (26), so that the efficiency of the entire charging portion (20) is also improved.

According to the eighth and ninth inventions , the counter electrode (26) of the second charged portion (20b) is constituted by a rod-shaped electrode having a polygonal section with an obtuse angle or a rod-shaped electrode having a circular section. Therefore, since the electric field does not concentrate on the edge in the counter electrode (26), ions are easily diffused. Therefore, the efficiency of diffusion charging is improved.

According to the tenth aspect of the invention , the diameter dimension or the diagonal dimension of the counter electrode (26) is set to a sufficiently small dimension with respect to the dimension between the discharge electrode (25) and the counter electrode (26). The surface area of the counter electrode (26) is reduced, and the absorption of ions is suppressed. Therefore, the diffusion component of the total ions generated in the second charged portion (20b) can be increased, so that it is possible to efficiently charge sub-micron order particles.

According to the eleventh aspect of the invention , the electric lines of force that wrap around the back side of the counter electrode (26) (the space (S1) opposite to the discharge electrode (25)) by the discharge electrode (25) and the counter electrode (26). It is formed. When ions fly along the straight line of electric force between the discharge electrode (25) and the counter electrode (26), they are easily absorbed by the counter electrode (26), but the lines of electric force that wrap around the back side of the counter electrode (26) Flying along the counter electrode (26) makes it difficult to be absorbed by the counter electrode (26). Therefore, a diffusion component of ions is generated in this space (S1), and diffusion charging is performed. Therefore, the efficiency of diffusion charging can be increased.

According to the twelfth aspect of the invention , as in the eleventh aspect , the lines of electric force that wrap around to the back side of the counter electrode (26) are also formed, so that a diffusion component of ions is generated in the space (S2) and diffused. Charging is performed. Therefore, the efficiency of diffusion charging can be increased.

According to the thirteenth aspect of the invention , since the counter electrode (26) of the second charged portion (20b) is disposed in the air flow path through which the air to be treated flows, the discharge electrode ( Ions that should jump out of 25) and enter the counter electrode (26) are affected by the airflow, and are easily diffused into the air without jumping into the counter electrode (26). Accordingly, the diffusion component of ions increases, and the efficiency of diffusion charge is improved.

According to the fourteenth aspect of the invention , since the air treatment device is configured by using both the collision charging method and the diffusion charging method, the suspended particles such as dust in the air are of the order of micron order to submicron order. Can be charged and captured efficiently. Further, by using the collision charging method and the diffusion charging method in combination, the charging of dust or the like can be completed in the casing of the device, and the device can be downsized.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

《 Technical prerequisite for invention》
A charging device according to the prerequisite technology of the present invention will be described. FIG. 1 is a schematic configuration diagram of the charging device (1). As shown in FIG. 1, the charging device (1) includes a charging unit (20) that charges floating particles in the air to be processed. The charging device (1) is configured by arranging the charging unit (20) in a duct (or casing) (2) through which air to be treated flows. The charging unit (20) includes a first charging unit (20a) of a collision charging method and a second charging unit (20b) of a diffusion charging method, and the first charging unit (20a) and the second charging unit (20b). ) Are provided separately.

  The first charging section (20a) includes a plate-like first counter electrode (22) parallel to the side plate (or top plate and bottom plate) (3) of the duct (2) and arranged at equal intervals, and A wire-like (linear) first discharge electrode (21) (ionization line) arranged in parallel with each first counter electrode (22) at a position that bisects the distance between one counter electrode (22) Have. A high voltage power source (not shown) is connected to the first discharge electrode (21) and the first counter electrode (22). In the first charged portion (20a), ions are emitted from the first discharge electrode (21) toward the first counter electrode (22), and most of the emitted ions reach the first counter electrode (22). . Ions are densely packed between the first discharge electrode (21) and the first counter electrode (22), and the air to be treated passes through that region, so that floating particles such as dust in the air to be treated are charged. . The collision charging method employed in the first charging portion (20a) is such that ions ejected from the first discharge electrode (21) are basically arranged along the electric lines of force indicated by dotted lines in FIG. It is a charging system that reaches (22).

  The second charging portion (20b) has a needle-like second discharge electrode (23) and a cylindrical second counter electrode (24) disposed on the outer periphery thereof. The tip surface of the second counter electrode (24) is disposed so as to be located behind the tip of the second discharge electrode (23). In the second charging portion (20b), the second discharge electrode (23) and the second counter electrode (24) are connected to a high voltage power source (not shown). In the second charged portion (20b), in addition to the large curvature of the electric lines of force formed by the second discharge electrode (23) and the second counter electrode (24), the air flow direction is the second counter electrode. This also contributes to the fact that the direction of incidence of ions on (24) is opposite, so that most of the ions emitted from the second discharge electrode (23) do not reach the second counter electrode (24) and air. Released into. The air to be treated is charged by passing through a space in which ions diffuse and float. In the diffusion charging method employed in the second charged portion (20b), ions that have jumped out of the second discharge electrode (23) flow basically not along the lines of electric force, and flow into the second counter electrode (24). This is a charging method that hardly reaches.

  In this charging device (1), the collision charging current is changed so that the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b). And the value of the diffusion charge current are set.

-Driving action-
In this base technology , in the charging device (1) for charging suspended particles in the air to be treated, ions that have jumped out of the first discharge electrode (21) reach the first counter electrode (22) along the lines of electric force. The first charged portion (20a) of the collision charge method and the second charged portion (20b) of the diffusion charge method in which the ions ejected from the second discharge electrode (23) flow along the lines of electric force and are released into the air. ) To form a charged part (20).

  Therefore, in this apparatus (1), in the charging method for performing the charging process for charging suspended particles in the air to be processed, the first charging process of the collision charging system and the second charging process of the diffusion charging system are used as the charging process. And the process of performing.

Here, the impact charging method has a characteristic that it is easy to charge floating particles of micron order (1 μm or more), and the diffusion charging method has a characteristic that it is easy to charge floating particles of submicron order (less than 1 μm). Therefore, in this base technology , suspended particles in the micron order (1 μm or more) are effectively charged in the first charged part (20a) of the impact charging method, and submicron order (1 μm) in the charged part (20b) of the diffusion charging method. (Less than) suspended particles can be effectively charged.

  Further, since the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b), the ratio of the collision charging current and the diffusion charging current is adjusted. The amount of ozone generated can be adjusted.

−Effects of prerequisite technologies−
As described above, in the base technology , the charged portion (20) is used in combination with the first charged portion (20a) of the collision charge method and the second charged portion (20b) of the diffusion charge method. It is possible to charge from relatively small ones on the order of submicron to relatively large ones on the order of microns. Therefore, there is no bias in the particle size of the suspended particles that can be charged, and the charging performance of the apparatus is improved.

  In the charging device (1), airborne particles such as dust are not ionized in the indoor space, but are ionized in the duct (2). Therefore, suspended particles can be captured in the duct (2), and suspended particles such as dust can be prevented from adhering to the wall of the room.

  Further, in this charging device (1), not only the diffusion charging type second charging unit (20b) but also the collision charging type first charging unit (20a) is used. However, the apparatus (10) can be downsized as a whole, whereas a large space is required and the apparatus tends to be upsized.

  Further, since the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b), the ratio of the collision charging current and the diffusion charging current is adjusted. The amount of ozone generated can be adjusted. In particular, the impact charge has a large charge density, so the energy of ions is large and ozone is likely to be generated, whereas the diffusion charge has a small charge density, so the ion energy is small and the generation of ozone is reduced. Yes, the amount of ozone generated can be suppressed by appropriately adjusting the ratio between the collision charging current and the diffusion charging current.

-Modifications of the underlying technology-
In this base technology , specific configurations of the discharge electrode (21, 23) and the counter electrode (22, 24) for each of the first charged portion (20a) of the collision charge method and the second charged portion (20b) of the diffusion charge method are used. May be changed. For example, the first charging portion (20a) is composed of a linear first discharge electrode (21) and a plate-like first counter electrode (22), but the first discharge electrode (21) is needle-shaped. It may be changed to other shapes. The second charged portion (20b) is composed of a needle-like second discharge electrode (23) and a cylindrical second counter electrode (24), and ions are generated from the second discharge electrode (23). The shape of the second discharge electrode (23) and the second counter electrode (24) may be changed as appropriate as long as the direction of the protrusion and the direction of the lines of electric force are deviated.

Embodiment 1 of the Invention
Described first embodiment of the present invention.

Embodiment 1 of the present invention differs from the base technology in the configuration of the charging unit (20) as shown in FIG. 2 in the charging device (1) for charging floating particles of air to be treated in the duct (2). This is an example. In this embodiment, a thin plate-like discharge electrode (25) is arranged in parallel with the side plate (or top plate and bottom plate) (3) of the duct (casing) (2), and between each discharge electrode (25), A rod-like counter electrode (26) is arranged in parallel with each discharge electrode (25).

A specific configuration of the charging unit (20) is shown in FIGS. The discharge electrode (25) is a band plate-like member, and is formed on both edge portions at substantially equal intervals of the band-shaped substrate portion (25c) with a triangular protrusion (with a sharp tip). May have a small radius) (25a, 25b) is formed. A discharge part (discharge location) is formed by the protrusions (25a, 25b). Thus, the discharge electrode (25) provided in the charge part (20) of Embodiment 1 is comprised by the sawtooth-shaped electrode. The discharge electrode (25) includes an upstream discharge portion (a discharge electrode (25) of the first charging portion (20a) described later) (25a) located on the upstream side in the air flow direction and a downstream in the air flow direction. A downstream discharge portion (a discharge electrode (25) of a second charging portion (20b) described later) (25b) located on the side is integrally formed. In the present invention, the “sawtooth electrode” refers to a plate-like electrode having plate-like projections having a substantially triangular shape or a pointed tip at predetermined intervals on at least one edge of the belt-like member. In the sawtooth electrode, triangular plate-like protrusions are formed symmetrically.

  The counter electrode (upstream counter electrode) (26a) on the upstream side in the air flow direction is parallel to the discharge electrode (25) on the virtual vertical plane passing through the tip or substantially the tip of the upstream discharge portion (25a) in FIG. Is arranged. The counter electrode (downstream counter electrode) (26b) on the downstream side in the air flow direction is arranged in parallel with the discharge electrode (25) on the virtual vertical plane passing through the center line or almost the center line of the counter electrode (26). Has been.

  The upstream discharge part (25a) and the upstream counter electrode (26a) constitute a first charging part (20a) of a collision charging method. Further, the downstream discharge part (25b) and the downstream counter electrode (26b) constitute a diffusion charging type second charging part (20b). That is, in terms of the flow direction of the air to be treated, the first charging unit (20a) is arranged on the upstream side of the air flow, and the second charging unit (20b) is arranged on the downstream side of the air flow. For this reason, with respect to the discharge electrode (25), the counter electrode (26a) of the first charging unit (20a) is arranged on the upstream side of the air flow, and the counter electrode of the second charging unit (20b) is on the downstream side of the air flow. (26b) is arranged.

  In this configuration, the charging unit (20) includes a counter electrode (upstream counter electrode) (26a) of the first charging unit (20a) and a counter electrode (downstream counter electrode) (26b) of the second charging unit (20b). ) Is disposed in the air flow path through which the air to be treated flows. In addition, it is preferable that at least the counter electrode (26) of the second charged portion (20b) is disposed in the air flow path through which the air to be treated flows.

  Since the upstream discharge part (25a) and the upstream counter electrode (26a) are arranged on substantially the same plane, the first charge part (20a) has the upstream discharge part (25a) and the upstream counter electrode ( The bending degree of the electric lines of force formed by 26a) is small. On the other hand, the second charged portion (20b) has the downstream counter electrode (26b) arranged at a position deviated from the direction in which ions are emitted from the downstream discharge portion (25b), and the downstream discharge The degree of bending of the lines of electric force formed by the portion (25b) and the downstream-side counter electrode (26b) is large.

Also in the first embodiment , the value of the collision charging current is such that the value of the collision charging current flowing through the first charging unit (20a) and the value of the diffusion charging current flowing through the second charging unit (20b) are different. And the value of the diffusion charge current are set.

FIG. 5A is a reference example in which the upstream discharge portion (25a) and the downstream discharge portion (25b) are formed at the same pitch of 25 mm with respect to the strip-shaped substrate portion (25c). Even in this case, it is possible to make the collision charging current of the first charging portion (20a) different from the diffusion charging current of the second charging portion (20b) depending on the arrangement of the counter electrode, but FIG. If formed as shown in FIG. 5C, the collision charge current and the diffusion charge current can be easily made different.

The example of FIG. 5B is an example in which the upstream discharge portion (25a) has a pitch of 25 mm and the downstream discharge portion (25b) has a pitch of 12.5 mm. The example of FIG. 5C is an example in which the upstream discharge portion (25a) is 50 mm pitch and the downstream discharge portion (25b) is 12.5 mm pitch. If comprised in this way, the number of the discharge locations which the 1st charge part (20a) has differs from the number of the discharge locations which the 2nd charge part (20b) has (it is a 1st than the discharge location of the 1st charge part (20a)). Since the number of discharge portions of the two charged portions (20b) increases), it becomes easier to make the diffusion charge current different from the collision charge current as compared with the example of FIG. Specifically, since the number of discharge points where diffusion charging is performed is twice to four times the number of discharge points where collision charging is performed, generation of ozone can be suppressed by increasing the ratio of the diffusion charge current .

-Driving action-
In this embodiment, from the upstream discharge portion (25a) toward the upstream counter electrode (26a), ions move substantially along the lines of electric force and collide with the upstream counter electrode (26a). As a result, collision-type discharge with high ion density is performed on the upstream side. On the other hand, from the downstream discharge part (25b) toward the downstream counter electrode (26b), in addition to the large curvature of the electric lines of force, the flow of air from the upstream side to the downstream side also acts, Most of them are released into the air without reaching the downstream counter electrode (26b). Thus, on the downstream side, a diffusion charge type discharge in which ions are released into the air is performed.

  Moreover, since the value of the collision charging current flowing through the first charging unit (20a) and the value of the diffusion charging current flowing through the second charging unit (20b) are different by adopting the above configuration, the collision charging current is different. And the ratio of the diffusion charge current can be adjusted, whereby the amount of ozone generated can be adjusted.

-Effect of Embodiment 1-
Also in the first embodiment , the charging unit (20) uses both the collision charging method and the diffusion charging method. The collision charging method easily charges micron-order suspended particles, and the diffusion charging method causes submicron order floating. Since particles are easily charged, suspended particles in the air can be charged from small particles on the order of submicron to large particles on the order of microns. Therefore, the charging performance of the device is improved.

Further, in the charging device (1) of the first embodiment , the floating particles such as dust are not ionized in the indoor space, but are ionized in the duct or casing (2). It can also be prevented from adhering to the walls of the wall.

  Furthermore, since not only the diffusion charging type charging unit (20) but also the collision charging type charging unit (20) is used, the apparatus (10) can be downsized.

  Further, as shown in the graph of FIG. 6, when the charging time is short, the charge amount is larger in the collision charge than in the diffusion charge. Diffuse charge is more. Therefore, when the air to be treated passes through the first charged portion (20a) and then through the second charged portion (20b), the amount of charge becomes larger than in the reverse case. According to this theory, in this embodiment, the upstream side in the flow direction of the air to be treated is the first charged portion (20a) and the downstream side is the second charged portion (20b). Can be sufficiently charged.

Further, since the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b), the ratio of the collision charging current and the diffusion charging current is adjusted. The amount of ozone generated can be adjusted. In particular, the impact charge causes ozone to be easily generated due to the high density of ions entering the counter electrode, whereas diffusion charge reduces the density of ozone due to its low density. The amount of ozone generated can be suppressed by appropriately adjusting the ratio of the charging current. Further, in FIG. 7, increasing the discharge portion of the air flow downstream side with less discharge points of the airflow upstream side as shown in FIG. 5 (C), the upstream side and the downstream side as shown in FIG. 5 (A) The dust collection efficiency can be increased efficiently with a smaller amount of current than the same number of discharge locations. Further, as shown in FIG. 8, the diffusion charge current ratio is slightly higher in (C) than in (A) of FIG. 5, so that the amount of ozone generated can be suppressed.

-Modification of Embodiment 1-
(Modification 1)
As shown in FIG. 9, in the first modification of the first embodiment , the discharge electrode (25) includes upstream discharge portions (first discharge portion (25a)) (25a) constituting the first charge portion (20a), and And a downstream discharge portion (second discharge portion (25b)) (25b) constituting the second charging portion (20b) and a sawtooth electrode (integrated discharge electrode ( 25)), the counter electrode (26a) of the first charged portion (20a) and the counter electrode (26b) of the second charged portion (20b) are also integrated. Specifically, the counter electrode (26) is composed of a total of two rod-shaped (or columnar) electrodes (26) arranged one above the other across the sawtooth discharge electrode (25). . The counter electrode (26) is disposed in parallel with the discharge electrode (25) on a virtual vertical plane passing through the tip or substantially the tip of the upstream discharge portion (25a). In this configuration, the counter electrode (26) is disposed at a position closer to the first discharge part (25a) than the second discharge parts (25b) (25b). Specifically, this is equivalent to the configuration in which only the upstream discharge electrode (26a) is provided in the example of FIG.

  Also in this configuration, the discharge electrode (25) in the second charged portion (20b) is compared with the degree of curvature of the electric field lines between the discharge electrode (25) and the counter electrode (26) in the first charged portion (20a). And the degree of curvature of the lines of electric force between the counter electrode (26) and the counter electrode (26) increase (see FIG. 10). Therefore, collision charge is generated in the first charged portion (20a), whereas diffusion charge is generated in the second charged portion (20b).

  For this reason, even if the configuration of this modification is employed, the same effects as those of the above embodiments can be obtained.

  In the first modification, as shown in FIG. 10, the negative electrode of the power source (27) is connected to the discharge electrode (25), and the positive electrode of the power source (27) is connected to the counter electrode (26). The positive pole side of the power supply (27) is grounded.

  Here, assuming that the current flowing through the discharge electrode (25) is I1 and the current flowing through the counter electrode (26) is I2, the collision charging current (I2) and the diffusion charging current (I1-I2) are applied to both electrodes. Both are configured to flow. The fact that both collision charge current and diffusion charge current flow means that both collision charge and diffusion charge occur.

  In this modification, the collision charge current flowing through the upstream discharge section (25a) and the diffusion charge current flowing through the downstream discharge section (25b) are set to have different values. Therefore, the ozone concentration can be adjusted.

( Reference example )
In the reference example , as shown in FIG. 11, two rod-like counter electrodes (26) are arranged one above the other so as to be parallel to each other, and a discharge electrode (25) (sawtooth electrode) is interposed therebetween. In the arrangement example, the tips of the protrusions (25a, 25b) formed on both edges of the belt-like substrate portion (25c) are directed to the counter electrode (26). In this example, the first charging portion (20a) of the collision charging method is formed between the discharge portion consisting of the protrusion (25a) located on the upper side and the counter electrode (26), only by this discharge portion and the counter electrode (26). And a second charging portion (20b) of a diffusion charging system. In addition, the first charging portion (20a) of the collision charging method is also provided between the discharge portion composed of the protrusion (25b) located on the lower side and the counter electrode (26) by using only the discharge portion and the counter electrode (26). And a second charging portion (20b) of a diffusion charging system. In this way, in order to form the first charged portion (20a) and the second charged portion (20b) with only one counter electrode (26) with respect to the discharge portion, in this reference example , the counter electrode (26) Thus, a configuration is adopted in which a space (S1) is provided on the side opposite to the discharge electrode (25).

  In this way, the degree of curvature that the electric lines of force formed between the discharge part (discharge electrode (25)) and the counter electrode (26) can form in the space between the discharge electrode (25) and the counter electrode (26). , And electric lines of force with a large degree of curvature that wrap around the back side of the counter electrode (26) through the outside between the discharge electrode (25) and the counter electrode (26).

  Therefore, between the electrodes, the collision charge type discharge formed by the phenomenon that ions are incident on the counter electrode (26) along the electric lines of force with a small degree of bending, and ions that deviate from the electric lines of force with a large degree of bending. Is generated by a phenomenon in which diffusion discharge is established due to a phenomenon that is released into the air. In particular, ions ejected from the discharge electrode (25) have the property of moving toward the counter electrode (26) along the lines of electric force, but the target counter electrode (26) is small and airflow Affects the movement of ions, so that the ions are released from the electric field as they are, and diffusion charges are generated. Further, the space (S1) on the back side of the counter electrode (26) when viewed from the discharge electrode (25) has a low electric field strength, and is a region where ions easily escape to this space (S1).

Since the impact charging and diffusion charging occurs, even if employing the structure of this reference example, it is possible to achieve the same effect as the above implementation form. Moreover, since the number of counter electrodes (26) can be reduced compared with the example of FIG. 3, FIG. 4, a structure can be simplified more.

In this reference example , the collision charge current flowing through the upstream discharge section (25a) and the diffusion charge current flowing through the downstream discharge section (25b) are set to have different values. Therefore, the ozone concentration can be adjusted.

( Modification 2 )
In Modification 2 , as shown in FIG. 12, two rod-like counter electrodes (26) are arranged one above the other so as to be parallel to each other, and a discharge electrode (25) (sawtooth electrode) is interposed therebetween. In this example, the sawtooth discharge electrode (25) is disposed so as to be orthogonal to a virtual plane passing through the two counter electrodes (26). In this example, only the discharge part (25a, 25b) and the counter electrode (26) between the left and right discharge parts (25a, 25b) and the counter electrode (26) located on the upper side of the discharge part (25a, 25b) A first charging unit (20a) and a diffusion charging type second charging unit (20b) are configured. In addition, between the left and right discharge parts (25a, 25b) and the counter electrode (26) located below the discharge parts (25a, 25b) and the counter electrode (26), only the impact charging system A first charging unit (20a) and a diffusion charging type second charging unit (20b) are configured. In this embodiment, in order to form the first charged portion (20a) and the second charged portion (20b) with only one counter electrode (26) with respect to the discharge portions (25a, 25b), A configuration is adopted in which a space (S2) is provided on the entire outer periphery of (26).

  In this way, the degree of curvature that the electric lines of force formed between the discharge part (discharge electrode (25)) and the counter electrode (26) can form in the space between the discharge electrode (25) and the counter electrode (26). , And electric lines of force with a large degree of curvature that wrap around the back side of the counter electrode (26) through the outside between the discharge electrode (25) and the counter electrode (26).

  Therefore, between the electrodes, the collision charge type discharge formed by the phenomenon that ions are incident on the counter electrode (26) along the electric lines of force with a small degree of bending, and ions that deviate from the electric lines of force with a large degree of bending. Is generated by a phenomenon in which diffusion discharge is established due to a phenomenon that is released into the air.

  Since collision charge and diffusion charge occur in this way, even if the configuration of this modification is adopted, the same effects as those of the above embodiments can be obtained. Moreover, since the number of counter electrodes (26) can be reduced compared with the example of FIG. 3, FIG. 4, a structure can be simplified more.

  Also in this modification, the collision charge current flowing through the upstream discharge section (25a) and the diffusion charge current flowing through the downstream discharge section (25b) are set to have different values. Therefore, the ozone concentration can be adjusted.

( Modification 3 )
Modification 3 is an example in which the configuration of the discharge electrode (25) is different from the example of FIG.

  Specifically, as shown in FIG. 13, the discharge electrode (25) includes a conductive rod-shaped base (25c) and a plurality of needle-shaped discharges with sharp tips fixed to the rod-shaped base (25c). Part (25a, 25b). Each discharge part (25a, 25b) is being fixed to the rod-shaped base part (25c) at a right angle. In addition, the discharge portions (25a, 25b) are set so that two are in one set, two of each set are positioned on one straight line, and all the discharge portions (25a, 25b) are along one virtual plane. Has been placed. Also in this example, the discharge part on the right side of the figure is the upstream discharge part (25a), and the discharge part on the left side of the figure is the downstream discharge part (25b).

  The counter electrode (26) is disposed above and below the discharge electrode (25). The counter electrode (26) is disposed along a vertical plane passing through the tip of the upstream discharge portion (25a). The counter electrodes (26) are arranged in parallel to each other at equal intervals from the upstream discharge portion (25a). Further, as the counter electrode (26), a downstream side counter electrode (26b) indicated by an imaginary line may be provided above and below the rod-shaped base (25c) of the discharge electrode (25) in parallel with the rod-shaped base (25c). Good. The downstream counter electrode (26b) is also arranged at equal intervals from the rod-like base (25c) of the discharge electrode (25).

  Even if comprised in this way, it can do between an upstream discharge part (25a) and a counter electrode (26) between a discharge part (25a, 25b) (discharge electrode (25)) and a counter electrode (26). Electric lines of force with a small degree of curvature and electric lines of force with a large degree of curvature formed between the downstream discharge portion (25b) and the counter electrode (26) are formed.

  Therefore, between the electrodes (25, 26), a collision-charge discharge formed by a phenomenon in which ions enter the counter electrode (26) along a line of electric force with a small degree of bending and an electric force with a large degree of bending. A diffusion charge type discharge is generated due to a phenomenon in which ions are released from the line and released into the air. Therefore, even if the configuration of this modification is adopted, the same effects as those of the above embodiments can be obtained.

  Also in this modification, the collision charge current flowing through the upstream discharge section (25a) and the diffusion charge current flowing through the downstream discharge section (25b) are set to have different values. Therefore, the ozone concentration can be adjusted.

<< Embodiment 2 of the Invention >>
Described embodiment 2 of the present invention.

The second embodiment is an example in which the charging device (1) according to the present invention is applied to an air purification device (air treatment device) (10). FIG. 14 is a cross-sectional view showing a schematic internal structure of the air purification device (10).

  The air purification device (10) includes a rectangular parallelepiped and hollow casing (11), and a plurality of functional parts are accommodated in the casing (11). An air inlet (12a) is formed on one wall surface of the casing (11), and an air outlet (12b) is formed on the wall surface facing the air inlet (12a). The air suction port (12a) is provided with a prefilter (14) that captures relatively large particles of dust (floating particles) contained in the air to be treated.

  An air passage (13) through which air flows from the air inlet (12a) toward the air outlet (12b) is formed in the casing (11). In this air passage (13), in order from the upstream side to the downstream side in the air flow direction, the charging part (20), the dust collecting part (electric dust collecting part) (30), the adsorbing member (15), and Propeller fan (16) is arranged.

Two sets of charging units (20) configured in the same manner are arranged one above the other. Each charging part (20) is comprised from the discharge electrode (25) and the counter electrode (26) similarly to what was demonstrated in Embodiment 1 of FIGS. The discharge electrode (25) is a strip-shaped electrode arranged in parallel with the air flow direction, and has a triangular shape with sharp edges at almost equal intervals on both edges of the strip-shaped substrate portion (25c). Protrusions (25a, 25b) are formed. A discharge portion is formed by the protrusions (25a, 25b). The discharge parts (25a, 25b) include an upstream discharge part (25a) on the upstream side in the air flow direction and a downstream discharge part (25b) on the downstream side in the air flow direction.

  The counter electrode (26) is a rod-shaped (or columnar) electrode, and two electrodes are arranged on both the upper and lower sides across the discharge electrode (25). Each counter electrode (upstream counter electrode on the upstream side in the direction of air flow) ) (26a) and a counter electrode (downstream counter electrode) (26b) on the downstream side in the air flow direction. The upstream counter electrode (26a) is disposed in parallel with the discharge electrode (25) on a virtual vertical plane passing through the tip or substantially the tip of the upstream discharge portion (25a). Further, the downstream counter electrode (26b) is arranged in parallel with the discharge electrode (25) on a virtual vertical plane passing through the center line or substantially the center line of the discharge electrode (25).

  The discharge electrode (25) is connected to the negative pole of a DC high-voltage power supply (27) for discharge, and the counter electrode (26) is connected to the positive pole of the power supply (27). This high-voltage power supply (27) is grounded on the positive electrode side.

  The dust collecting part (30) includes a first electrode (31) to which a negative pole of a DC high-voltage power supply (28) for dust collection is connected and a second electrode (32 to which a positive pole of the power supply (28) is connected. ). The positive pole side of the power supply (28) is grounded. The first electrode (31) and the second electrode (32) may be ones in which electrode plates are alternately arranged at equal intervals, or the second electrode (32) is formed in a lattice shape in a small space in each lattice. A needle-like first electrode (31) may be disposed.

  The adsorbing member (15) is not shown in detail, but adsorbent such as zeolite adsorbs odor components on the surface of a honeycomb-shaped substrate having a number of fine air circulation holes along the air flow direction. The fine powder is supported. The adsorbing member (15) carries fine powder of the deodorizing catalyst together with the adsorbent. This adsorbing member (15) captures the odorous substance with the adsorbent when a part of the odorous substance in the air passes through the dust collecting part (30) and deodorizes it on the surface. Decomposes by the action of the catalyst. As this deodorization catalyst, a heat catalyst or a photocatalyst that is activated by heat, light, active substances such as ozone generated by discharge of the charged portion (20), and promotes a decomposition reaction of odor components can be used.

As described above, the air purification device (10) includes the charging unit (20) for charging the dust in the air to be treated, and the dust collecting unit (electric dust collecting unit) (30) for collecting the charged dust. And. The charging unit (20) includes the first charging unit (20a) of the collision charging method and the second charging unit (20b) of the diffusion charging method, as in the base technology and the first embodiment .

  In this air purification device (10), a charging process for charging dust in the air to be treated and an electrostatic dust collecting process for electrically collecting the charged dust are performed. It is a step of performing a first charging step of a charging method and a second charging step of a diffusion charging method.

Also in the second embodiment , the value of the collision charging current and the diffusion are different so that the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b). The value of the charging current is set. As a structure for setting the collision charging current and the diffusion charging current, a structure as shown in FIG. 5 is adopted.

-Driving action-
When the air purification device (10) according to this embodiment is activated, the propeller fan (16) rotates, and the indoor air that is the air to be treated is sucked into the casing (11) from the air suction port (12a). In the charged part (20), a potential difference is applied between the discharge electrode (25) and the counter electrode (26), and ions are ejected from the discharge electrode (25). Most of the ions jumping out from the upstream discharge part (25a) of the discharge electrode (25) reach the upstream counter electrode (26a), but most of the ions jumping out from the downstream discharge part (25b) are in the downstream counter electrode. Diffuses in the air without reaching (26b).

That is, in this air purification device (10), in the air treatment method that performs a charging step of charging dust in the air to be treated and an electrostatic dust collection step of electrically collecting the charged dust, A first charging process using an impact charging method and a second charging process using a diffusion charging method are performed.

The impact charging method is easy to charge relatively large dust (floating particles) of micron order (1 μm or more), and the diffusion charging method has the characteristic of easily charging relatively small dust of submicron order (less than 1 μm). . The first charging portion (20a) is a collision charging method, and most of the ions that have jumped out of the upstream discharge portion (25a) reach the upstream counter electrode (26a). Ions are densely packed between the upstream discharge part (25a) and the upstream counter electrode (26a), and relatively large dust of micron order is charged when the air to be treated flows between them. On the other hand, the second charged portion (20b) is a diffusion charge system, and most of the ions jumping out from the downstream discharge portion (25b) are released into the air. Therefore, ions are dispersed in the air, and when the air to be treated flows through this space, relatively small dust of submicron order is charged.

  Further, since the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b), the ratio of the collision charging current and the diffusion charging current is adjusted. The amount of ozone generated can be adjusted.

  The air to be treated flows into the dust collecting section (30) while being charged from dust having a small particle size on the order of submicron to dust having a large particle size on the order of micron. The dust collection part (30) has a negatively charged first electrode (31) and a positively charged second electrode (32), so that ionized dust is captured by Coulomb force. can do.

  In addition, an adsorbing member (15) carrying a deodorizing catalyst is disposed at the subsequent stage of the dust collecting unit, and odor components are also removed and decomposed.

  And the to-be-processed air from which the dust was removed and the odor component was decomposed is blown out from the air outlet (12b) to the indoor space.

-Effect of Embodiment 2-
Also in the second embodiment , by employing both the impact charging method and the diffusion charging method, dust in the air can be charged and removed from sub-micron order to micron order. Therefore, it is possible to prevent the particle size of the dust that can be removed from being biased.

  In addition, when only the collision charging method or only the diffusion charging method is adopted, the device (10) tends to be large. In this embodiment, both the collision charging method and the diffusion charging method are adopted. (10) can be reduced in size.

  Furthermore, in this embodiment, the diffusion charging method is adopted, but the ions are charged in the casing (11) without discharging ions into the room, so that the charged dust adheres to the wall of the room. This also prevents the walls from getting dirty.

  Further, since the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b), the ratio of the collision charging current and the diffusion charging current is adjusted. The amount of ozone generated can be adjusted. In particular, the impact charge causes ozone to be easily generated due to the high density of ions entering the counter electrode, whereas diffusion charge reduces the density of ozone due to its low density. The amount of ozone generated can be suppressed by appropriately adjusting the ratio of the charging current.

<< Embodiment 3 of the Invention >>
Embodiment 3 of the present invention will be described.

The third embodiment is an example in which charging device (1) is applied to the air purification device (air handling unit) (10) according to the present invention as well as the embodiment 2, a specific configuration embodiment of the apparatus (10) It is different from Form 2 . FIG. 15 is a cross-sectional view showing a schematic internal structure of the air purification device (10).

  The air purification device (10) includes a hollow casing (11), and a plurality of functional parts are accommodated in the casing (11). The casing (11) has an air inlet (12a) at the right end of the figure on the upper and lower (or left and right) wall surfaces, and an air outlet at the left end of the figure on the upper and lower (or left and right) wall surfaces. (12b) is formed. The air suction port (12a) is provided with a prefilter (14) that captures relatively large particles of dust (floating particles) contained in the air to be treated.

  An air passage (13) through which air flows from the air inlet (12a) toward the air outlet (12b) is formed in the casing (11). In this air passage (13), in order from the upstream side to the downstream side in the air flow direction, the charging part (20), the dust collecting part (30), the adsorbing member (15), and the centrifugal fan (sirocco fan) (17) is arranged. The air passage (13) enters the air inlet (12a) from the top and bottom (or left and right) with respect to the casing (11) and then bends at a substantially right angle toward the air outlet (12b). At (17), it is further bent toward the direction of the air outlet (12b).

Two sets of charging units (20) configured in the same manner are arranged one above the other. Each charging part (20) is comprised from the discharge electrode (25) and the counter electrode (26) similarly to what was demonstrated in Embodiment 1 of FIGS. The discharge electrode (25) is a strip-shaped electrode arranged in parallel with the air flow direction, and has a triangular protrusion (25a, 25a, 25b) is formed. A discharge portion is formed by the protrusions (25a, 25b). The discharge parts (25a, 25b) include an upstream discharge part (25a) on the upstream side in the air flow direction and a downstream discharge part (25b) on the downstream side in the air flow direction.

Also in the third embodiment , the value of the collision charging current and the diffusion are different so that the value of the collision charging current flowing through the first charging unit (20a) and the value of the diffusion charging current flowing through the second charging unit (20b) are different. The value of the charging current is set. As a structure for setting the collision charging current and the diffusion charging current, a structure as shown in FIG. 5 is adopted.

  The counter electrode (26) is a rod-shaped electrode, and two electrodes are arranged on both sides of the discharge electrode (25), and each counter electrode (upstream counter electrode) (26a) on the upstream side in the air flow direction, And a counter electrode (downstream counter electrode) (26b) on the downstream side in the air flow direction. The upstream counter electrode (26a) is disposed in parallel with the discharge electrode (25) on a virtual vertical plane passing through the tip or substantially the tip of the upstream discharge portion (25a). Further, the downstream counter electrode (26b) is disposed in parallel with the discharge electrode (25) on a virtual vertical plane passing through the center line or substantially the center line of the discharge electrode (25).

The air passage (13) is bent at a position after the air to be treated has passed through the charged portion (20). In the air passage (13), a rectifying member (18) is disposed on the upstream side of the dust collecting portion (30). In addition, the air passage (13) has, on the downstream side of the dust collector (30), an adsorbing member (30) configured to carry a dust collector (30) configured in the same manner as in the second embodiment , and an adsorbent and a deodorizing catalyst. 15) and are arranged.

  A bell mouth (19) as an air inflow guide to the sirocco fan (17) is disposed downstream of the adsorbing member (15). The air introduced into the sirocco fan (17) by the bell mouth (19) changes the flow direction by the sirocco fan (17) and is blown out of the casing (11) from the air outlet (12b). It is like that.

  In this embodiment, the power sources of the charging unit (20) and the dust collecting unit (30) are not shown.

-Driving action-
When the air purification device (10) according to this embodiment is activated, the sirocco fan (17) starts to rotate, and indoor air that is air to be treated is sucked into the casing (11) from the air suction port (12a). In the charged part (20), a potential difference is applied between the discharge electrode (25) and the counter electrode (26), and ions are ejected from the discharge electrode (25). Most of the ions ejected from the upstream discharge part (25a) of the discharge electrode (25) reach the upstream counter electrode (26a), but most of the ions ejected from the downstream discharge part are the downstream counter electrode (26b). Diffuses in the air without reaching. At that time, since the air passage (13) is bent, the diffusion effect is enhanced.

  Further, since the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b), the ratio of the collision charging current and the diffusion charging current is adjusted. The amount of ozone generated can be adjusted.

  Ions that have jumped out of the upstream discharge section (25a) are densely packed between the upstream discharge section (25a) and the upstream counter electrode (26a). Large dust is charged. On the other hand, most of the ions jumping out from the downstream discharge part (25b) are released into the space in the casing (11), so they are dispersed in the space, and the submicron order comparison is made when the air to be treated flows through this space. Small dust is charged.

  The air to be treated flows into the dust collecting section (30) while being charged from dust having a small particle size on the order of submicron to dust having a large particle size on the order of microns. Since the dust collection part (30) has an electrode plate having a positive charge and an electrode plate having a negative charge, the ionized dust can be captured by Coulomb force.

  Most of the dust in the air to be treated has been removed by passing through the dust collection part (30), but there is also dust that is not captured by the dust collection part (30) and goes to the air outlet (12b). The dust that has passed through the dust collecting part (30) is captured by the adsorption member (15). The adsorbing member (15) also carries a deodorizing catalyst, where odor components are also decomposed.

  And the to-be-processed air from which the dust was removed and the odor component was decomposed is blown out from the air outlet (12b) to the indoor space.

-Effect of Embodiment 3-
Also in the third embodiment , by employing both the impact charging method and the diffusion charging method, dust in the air can be charged and removed from small ones on the order of submicron to large ones on the order of microns. Therefore, it is possible to prevent the particle size of the dust that can be removed from being biased.

  Further, when only the collision charging method or only the diffusion charging method is adopted, the apparatus tends to be large. In this embodiment, the apparatus (10) is obtained by adopting both the collision charging method and the diffusion charging method. Can be miniaturized. In addition, since the air passage (13) is bent immediately after the charging portion (20), the ion diffusion effect can be easily enhanced, and high efficiency can be obtained even if the device (10) is downsized.

  Furthermore, in this embodiment, the diffusion charging method is adopted, but the ions are not discharged into the room but are charged in the casing (11), so that the charged dust is applied to the wall of the room. It can also prevent the wall from becoming dirty due to adhesion.

  Further, since the value of the collision charging current flowing through the first charging unit (20a) is different from the value of the diffusion charging current flowing through the second charging unit (20b), the ratio of the collision charging current and the diffusion charging current is adjusted. The amount of ozone generated can be adjusted. In particular, the impact charge causes ozone to be easily generated due to the high density of ions entering the counter electrode, whereas diffusion charge reduces the density of ozone due to its low density. The amount of ozone generated can be suppressed by appropriately adjusting the ratio of the charging current.

<< Other Reference Examples and Embodiments >>
About the said embodiment, it is good also as the following structures.

For example, in a configuration in which one bar-like counter electrode (26) is provided above and below the sawtooth discharge electrode (25), as shown in FIGS. 16 (a) and 16 (b) which are reference examples , the counter electrode (26) may be arranged further upstream of the airflow than the upstream end of the discharge electrode (25). An example of electrode dimensions and voltages in this case is shown in FIG. 17 as a reference example . In the figure, the diameter of the counter electrode is φ, the distance between the tip of the upstream discharge portion (25a) and the counter electrode (26) is D, the voltage applied to the discharge electrode is V, and the thickness of the discharge electrode (25) is t. When the width of the belt-like substrate portion (25c) is A, the protruding dimension of each discharge portion (25a, 25b) from the substrate portion (25c) is B, and the tip angle of the discharge portion (25a, 25b) is θ,
1mm ≦ φ ≦ 3mm
15mm ≦ D ≦ 35mm
−7 kV ≦ V ≦ −10 kV
10 μm ≦ t ≦ 100 μm
A = 8mm
B = 5mm
C = 25mm
10 ° ≦ θ ≦ 30 °
Is set to the value represented by.

FIG. 18 shows a lateral suction type air purification device, and the length L of the discharge electrode (25) in the charging unit (20)
L is set to 300 mm.

  And by making the dimensions as described above, collision charge and diffusion charge are efficiently generated. Note that stainless steel can be used for both the discharge electrode (25) and the counter electrode (26), but other conductive materials may be used.

As another reference example, as shown in FIGS. 19 (a) and 19 (b), two rod-like counter electrodes (26a, 26b) are provided above and below the sawtooth discharge electrode (25). In addition, the distance from the discharge electrode (25) to the counter electrode (26b) of the second charged portion (20b) rather than the distance from the discharge electrode (25) to the counter electrode (26a) of the first charged portion (20a) May be increased. Increasing the distance between the discharge electrode (25) and the counter electrode (26b) of the second charged portion (20b) reduces the rate of collision charge, and diffusion charge is likely to occur in the second charged portion (20b). That is, if the distance from the discharge electrode of the first charged portion (20a) to the counter electrode is different from the distance from the discharge electrode of the second charged portion (20b) to the counter electrode, the diffusion charge current increases, Occurrence can be suppressed.

  In the above embodiment, the counter electrode (26b) of the second charged portion (20b) is a rod or column and has a circular cross section. As shown in FIG. 20, the counter electrode (26b) has a circular cross section. You may use the thing of the cross-sectional polygon in which the vertex angle became an obtuse angle. The example in the figure shows a discharge electrode (26a) having a regular octagonal cross section. In that case, the counter electrode (26b) of the second charged portion (20b) has a diagonal dimension or a diameter dimension φ of 1/5 of the dimension (D) between the discharge electrode (25) and the counter electrode (26). It should be larger than zero (mm) below.

Further, in the first to third embodiments , the counter electrode (26a) of the first charging unit (20a) and the counter electrode (26b) of the second charging unit (20b) do not necessarily have the same shape. In the first charged part (20a), the counter electrode (26a) is shaped like a plate or a thick bar so that ions can easily jump in. In the second charged part (20b) of the diffusion charge method, the counter electrode (26b) is made as a thin bar and the ion May be difficult to jump into.

  Furthermore, the dust collection section (30) is not limited to a system using an electrode plate or the like, and may be configured using an electrostatic filter. Moreover, the polarities of the electrodes of the charging unit (20) and the dust collecting unit (30) are not limited to the above embodiments, and may be reversed, for example.

In addition, the configuration in which the diffusion charge current and the collision charge current are different includes (a) the value of the collision charge current flowing through the first charging unit (20a) and the value of the diffusion charge current flowing through the second charging unit (20b). And (b) a configuration in which the number of discharge locations of the first charged portion (20a) and a number of discharge locations of the second charged portion (20b) are different, and (c) upstream in the air flow direction. A configuration in which the number of discharge portions of the charged portion located on the side and the number of discharge portions of the charged portion located on the downstream side are different, and (d) the distance from the discharge electrode to the counter electrode of the first charged portion (20a) Although the structure which makes the distance from the discharge electrode of a 2nd charged part (20b) to a counter electrode different can be considered, in this invention, the number of the discharge locations which the 1st charged part (20a) has, and the 2nd charged part (20b) The structure which makes the number of the discharge locations which) have differ should just be employ | adopted.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

  As described above, the present invention is useful for a charging device and a charging method for charging floating particles such as dust in the air to be processed, and an air processing device and an air processing method for collecting the charged dust.

It is a schematic block diagram of the charging device which concerns on the premise technique of this invention. 1 is a schematic configuration diagram of a charging device according to Embodiment 1. FIG. 1 is a perspective view illustrating a specific configuration of a charging device according to Embodiment 1. FIG. 1 is a side view showing a specific configuration of a charging device according to Embodiment 1. FIG. It is a figure which shows the modification of the structure of a sawtooth electrode. It is a graph which shows the relationship between the residence time of the ion in air, and the amount of electrification. It is a graph showing the dust collection efficiency at the time of changing the number of discharge parts. It is a graph showing the dust collection efficiency at the time of changing the number of discharge parts. 6 is a diagram illustrating a charging unit according to a first modification of the first embodiment . FIG. FIG. 10 is an electric circuit diagram in a state where a power source is connected to the charging unit of FIG. 9. 6 is a diagram illustrating a charging unit of a reference example of Embodiment 1. FIG. 6 is a diagram illustrating a charging unit according to a second modification of the first embodiment . FIG. 6 is a diagram illustrating a charging unit according to a third modification of the first embodiment . FIG. It is sectional drawing which shows the schematic internal structure of the air purification apparatus which concerns on Embodiment 2. FIG. It is sectional drawing which shows the schematic internal structure of the air purification apparatus which concerns on Embodiment 3. FIG. It is a side view which shows schematic structure of the reference example of a charging part. It is a figure which shows an example of an electrode dimension and a voltage. It is a perspective view of the air purification apparatus of the horizontal suction system which concerns on a reference example . It is a side view which shows schematic structure of the reference example of a charging part. It is sectional drawing which shows schematic structure of other embodiment of a counter electrode.

1 Charging device
10 Air treatment equipment
20 Charged part
20a First charged part
20b Second charging section
25 Discharge electrode
25a Upstream discharge section (first discharge section)
25b Downstream discharge part (second discharge part)
26 Counter electrode
26a Counter electrode
26b Counter electrode
30 Electric dust collector
S1 space

Claims (14)

A charging device comprising a charging unit (20) for charging suspended particles in the air to be treated,
The charging unit (20) includes a first charging unit (20a) of a collision charging method and a second charging unit (20b) of a diffusion charging method,
The number of discharge points of the first charged part (20a) is different from the number of discharge points of the second charged part (20b),
The charging device, wherein the number of discharge locations of the second charging unit (20b) is greater than the number of discharge locations of the first charging unit (20a) . In claim 1 ,
The charging device, wherein an interval between discharge portions of the second charging unit (20b) is ¼ or more and ½ or less of an interval between discharge portions of the first charging unit (20a). A charging device comprising a charging unit (20) for charging suspended particles in the air to be treated,
The charging unit (20) includes a first charging unit (20a) of a collision charging method and a second charging unit (20b) of a diffusion charging method,
The number of discharge parts of the charged part located on the upstream side in the air flow direction is different from the number of discharge parts of the charged part located on the downstream side,
The charging device, wherein the number of discharge locations of the second charging unit (20b) is greater than the number of discharge locations of the first charging unit (20a) . In claim 3 ,
The charging device, wherein an interval between discharge portions of the second charging unit (20b) is ¼ or more and ½ or less of an interval between discharge portions of the first charging unit (20a). In any one of Claims 1-4 ,
The charging device, wherein the first charging unit (20a) is arranged upstream with respect to the flow direction of the air to be treated, and the second charging unit (20b) is arranged downstream. In claim 5 ,
The discharge electrode (25a) of the first charged part (20a) and the discharge electrode (25b) of the second charged part (20b) are constituted by an integrated discharge electrode (25),
The counter electrode (26a) of the first charged portion (20a) is disposed on the upstream side of the airflow with respect to the discharge electrode (25), and the counter electrode (26b) of the second charged portion (20b) is positioned on the downstream side of the airflow. Is disposed. In claim 6 ,
The integrated discharge electrode (25) constitutes the first discharge part (25a) constituting the discharge electrode (25a) of the first charge part (20a) and the discharge electrode (25b) of the second charge part (20b). A second discharge part (25b)
The counter electrode (26a) of the first charged portion (20a) and the counter electrode (26b) of the second charged portion (20b) are constituted by an integrated counter electrode (26), and the integrated counter electrode (26) Is disposed closer to the first discharge part (25a) than to the second discharge part (25b). In any one of Claims 1-7 ,
The charging device, wherein the counter electrode (26) of the second charging unit (20b) is constituted by a bar-shaped electrode having a polygonal cross section with an obtuse angle. In any one of Claims 1-7 ,
The charging device, wherein the counter electrode (26) of the second charging unit (20b) is formed of a rod-like electrode having a circular cross section. In claim 8 or 9 ,
The counter electrode (26) of the second charged portion (20b) has a diagonal dimension or a diameter dimension of 1/5 or less of the dimension between the discharge electrode (25) and the counter electrode (26), and larger than zero (mm). A charging device characterized by that. In any one of claims 8 to 10 ,
A charging device, wherein a space (S1) is provided on a side opposite to the discharge electrode (25) with respect to the counter electrode (26) of the second charging unit (20b). In any one of claims 8 to 10 ,
A charging device, wherein a space (S2) is provided in the entire outer periphery of the counter electrode (26) of the second charging unit (20b). In claim 11 or 12 ,
A charging device, wherein the counter electrode (26) of the second charging unit (20b) is disposed in an air flow path through which air to be treated flows. An air treatment device comprising a charging part (20) for charging dust in the air to be treated and an electric dust collecting part (30) for collecting charged dust,
The charge section (20) includes a first charge section of the impact charging technique and (20a), is constituted by any one of charging device according to claim 1 to 13, and a second charge section of the diffusion charging technique (20b) An air treatment device characterized by that.

Images