JP2015142731A - Air-purifying unit and air-treating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent ozone from being generated when absolute humidity is low.SOLUTION: An air-purifying unit has: a discharge treatment unit (51) that generates an active species by discharging in air; a power source (52) that supplies power to the discharge treatment unit (51); and a control unit (72) that controls the power source (52) such that the average discharge output time of the discharge treatment unit (51) increases in accordance with a reduction in the absolute humidity of the air or such that the average discharge output time increases more when a humidification operation is not reported than when the humidification operation is reported.

Description

  The present disclosure relates to an air cleaning unit including a discharge processing unit that performs streamer discharge, and an air processing apparatus including such an air cleaning unit.

  There is known a discharge device that performs streamer discharge between a discharge electrode and a counter electrode (see, for example, Patent Document 1). The discharge device of Patent Document 1 is mounted on an air cleaner. The discharge device has a discharge electrode and a counter electrode. The discharge electrode has a discharge needle.

  When the power supply applies a voltage between the discharge electrode and the counter electrode, a streamer discharge is generated from the tip of the discharge needle of the discharge electrode toward the counter electrode. Accompanying this streamer discharge, active species (electrons, ions, radicals, ozone, etc.) that are highly reactive substances are generated in the air. This active species decomposes and removes harmful substances and odorous substances in the air.

JP 2005-296916 A

  Thus, the active species generated in the streamer discharge include hydroxyl radicals (OH radicals) generated from moisture in the air. For this reason, when there is little moisture in the air, that is, when the absolute humidity of the air is low, there is a problem in that the number of active species produced decreases and the ability to decompose harmful substances and the like decreases.

  An object of this invention is to suppress the fluctuation | variation of the capability to produce | generate an active species accompanying the change of the absolute humidity of air.

  A first air cleaning unit according to the present disclosure includes a discharge processing unit (51) that generates active species by discharge in air, a power source (52) that supplies power to the discharge processing unit (51), and an absolute humidity of air. If the discharge average of the discharge output of the discharge processing unit (51) increases according to the decrease, or if it is not notified that the humidification operation is performed, the discharge is performed more than when the humidification operation is notified. And a control unit (72) for controlling the power source (52) so that the time average of the output becomes large.

  According to this, since the time average of the discharge output of the discharge processing unit (51) increases as the absolute humidity decreases, it is possible to suppress a decrease in the ability to generate active species when the absolute humidity is low. For this reason, the fluctuation | variation of the capability to produce | generate an active species accompanying the change of the absolute humidity of air can be suppressed. Further, when not notified that the humidifying operation is performed, the time average of the discharge output is made larger than when notified that the humidifying operation is performed. In the case where the humidification operation is not performed, it can be assumed that the absolute humidity is relatively low. Therefore, it is possible to suppress a decrease in the ability to generate active species in such a case.

  The second air purification unit further includes a temperature sensor (82) for detecting the temperature of the air and a relative humidity sensor (84) for detecting the relative humidity of the air in the first air purification unit. The controller (72) obtains absolute humidity based on the output of the temperature sensor (82) and the output of the relative humidity sensor (84).

  According to this, since the absolute humidity can be obtained using an inexpensive temperature sensor and a relative humidity sensor that are commonly used, the cost of the air cleaning unit can be suppressed.

  The third air purification unit further includes a temperature sensor (82) for detecting the temperature of the air in the first air purification unit. The control unit (72) controls the power source (52) so that the time average of the discharge output is increased in accordance with a decrease in temperature detected using the temperature sensor (82).

  In an actual environment, the lower the air temperature, the lower the absolute humidity is. Therefore, in the third air cleaning unit, the control unit (72) controls the power source (52) so that the time average of the discharge output of the discharge processing unit (51) increases as the temperature decreases. In this case, it is not necessary to use a relative humidity sensor.

  In the fourth air purification unit, in any one of the first to third air purification units, the power source (52) changes the magnitude of the current supplied to the discharge processing unit (51). The discharge output is changed.

  According to this, since the power supply (52) changes the magnitude of the current supplied to the discharge processing section (51), the discharge output of the discharge processing section (51) can be easily changed.

  In the fifth air purification unit, in any one of the first to third air purification units, the power source (52) intermittently supplies current to the discharge processing unit (51), and the discharge processing is performed. The time average of the discharge output is changed by changing the duty ratio of the current supplied to the section (51).

  According to this, since the power supply (52) changes the duty ratio of the current supplied to the discharge processing section (51), the time average of the discharge output of the discharge processing section (51) is changed without changing the current value. can do. The configuration of the power source (52) is simplified, and the cost of the power source (52) can be reduced.

  An air treatment device according to the present disclosure includes a first air cleaning unit (50), a casing (11) in which an air passage is formed, and a fan (18) that sucks air outside the casing (11) into the air passage. And an air purification part (20) disposed in the air passage and collecting dust from the air in the air passage. The air cleaning unit (50) is arranged in the casing (11) and supplies the generated active species to the air passage.

  According to this, since the time average of the discharge output of the discharge processing unit (51) increases as the absolute humidity decreases, the air processing apparatus suppresses a decrease in the ability to generate active species when the absolute humidity is low. be able to. Moreover, when not notified that the humidification operation is performed, it is possible to suppress a decrease in the ability to generate active species.

  According to the above air purification unit, it is possible to suppress a decrease in the ability to generate active species when the absolute humidity of the air is low, and to suppress fluctuations in the ability to generate active species accompanying changes in absolute humidity. it can.

FIG. 1 is a perspective view showing an overall configuration of an air treatment device according to an embodiment of the present invention. FIG. 2 is a schematic longitudinal sectional view showing the inside of the air treatment apparatus of FIG. FIG. 3 is a block diagram showing the flow of air in the air treatment apparatus of FIG. FIG. 4 is a schematic longitudinal sectional view showing the inside of the air treatment device of FIG. 1 near the front side. FIG. 5 is a perspective view of the humidifying unit of FIG. FIG. 6 is a diagram illustrating a configuration example of the air cleaning unit. FIG. 7 is a graph illustrating an example of control by the control unit. FIG. 8 is a graph illustrating another example of control by the control unit. FIG. 9 is a graph showing still another example of control by the control unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Components shown with the same reference numbers in the drawings are identical or similar components. The following embodiments are essentially preferable exemplifications, and are not intended to limit the scope of the present invention, its application, or its use.

<Overall configuration of air treatment device>
FIG. 1 is a perspective view showing an overall configuration of an air treatment device according to an embodiment of the present invention. FIG. 1 shows a state in which the water tank is pulled out from the casing. FIG. 2 is a schematic longitudinal sectional view showing the inside of the air treatment apparatus of FIG. FIG. 3 is a block diagram showing the flow of air in the air treatment apparatus of FIG.

  As shown in FIGS. 1 to 3, the air treatment device (10) according to the present embodiment includes an air purification unit (20) for purifying air, a humidification unit (40) for humidifying air, and an air purifier. Unit (50).

  The air treatment device (10) has a casing (11). The casing (11) is formed in a rectangular shape that is flat in the front-rear direction. A front panel (11a) is formed on the front side (near the left side in FIG. 1) of the casing (11). A suction port (12) for introducing air into the casing (11) is formed in the front panel (11a) (see FIG. 2). The suction port (12) is formed on the left and right sides of the front panel (11a), for example. Moreover, the blower outlet (13) for blowing off the air in a casing (11) is formed in the casing (11) in the site | part near the upper back. An air passage (14) through which air flows from the suction port (12) to the blowout port (13) is formed in the casing (11).

  As shown in FIGS. 2 and 3, in the air passage (14), in order from the upstream side to the downstream side of the air flow, the prefilter (21), the ionization unit (22), the pleat filter (23), A deodorizing member (24), a humidifying unit (40), and a centrifugal fan (18) for sucking air outside the casing (11) into the air passage (14) are provided.

  An inflow end of the return passage (15) is opened above the centrifugal fan (18) and below the outlet (13). That is, a part of the air flowing out from the air passage (14) to the blowout port (13) is divided into the return passage (15). The return passage (15) forms a space extending forward and backward so as to be partitioned from the air passage (14). The outflow end of the return passage (15) is connected to the upstream side of the prefilter (21). Further, a discharge processing section (51) is provided in the return passage (15).

  FIG. 4 is a schematic longitudinal sectional view showing the inside of the air treatment device of FIG. 1 near the front side. As shown in FIG. 4, a guide passage (16) communicating with the return passage (15) is formed on the front side of the prefilter (21). The guide passage (16) is partitioned by a partition member or the like formed on the back side of the front panel (11a), for example. The guide passage (16) guides the air flowing out from the return passage (15) to the intermediate portion in the width direction of the pre-filter (21), and causes the air to flow out to the left and right sides to be upstream of the pre-filter (21). (Refer to the arrow in the guide passage (16) in FIG. 4).

  Here, the return passage (15) is branched on the downstream side of the discharge processing section (51), one of which communicates with the guide passage (16), and the other is the water tank (41) of the humidifying unit (40). ) Communicates with the transfer pipe (30) toward In the middle of the transfer pipe (30), a blower pump (31) is provided for supplying air containing active species generated in the discharge treatment section (51) to the water in the water tank (41). The blower pump (31) may be omitted.

  The air treatment device (10) of FIG. 1 has a sensor unit (80) above the air passage (14) as shown in FIG. The sensor unit (80) is disposed in the flow of air flowing from the outside of the air treatment device (10) into the air passage (14). The sensor unit (80) detects the temperature and relative humidity of the air that has flowed in.

<Configuration of the air purification unit>
As shown in FIG. 2, the air treatment device (10) includes the above-described prefilter (21), ionization unit (22), pleat filter (23), deodorization as an air purification unit (20) for purifying air. It has a member (24). The air purification unit (20) is disposed in the air passage (14) and collects dust and deodorizes the air in the air passage (14). As will be described below, the air purification unit (20) performs deodorization by adsorption and decomposition of components to be treated (odorous substances and harmful substances).

  The pre-filter (21) constitutes a dust collection filter that physically captures relatively large dust contained in the air.

  An ionization part (22) charges the dust in air. The ionization part (22) is provided with, for example, a linear electrode and a plate-like electrode facing the linear electrode. In the ionization section (22), a voltage is applied from the power source between the two electrodes, and corona discharge is performed between the two electrodes. By this corona discharge, dust in the air is charged so as to have a predetermined charge (positive or negative charge).

  The pleated filter (23) constitutes a corrugated electrostatic filter. That is, in the pleated filter (23), the dust charged by the ionization unit (22) is electrically attracted and captured. Note that a deodorizing material such as a photocatalyst may be supported on the pleated filter (23).

  The deodorizing member (24) carries a deodorizing agent for deodorizing air on the surface of the substrate having the honeycomb structure. As the deodorizer, an adsorbent that adsorbs the component to be treated in the air, a catalyst for oxidatively decomposing the component to be treated, and the like are used.

<Composition of humidification unit>
FIG. 5 is a perspective view of the humidifying unit of FIG. As shown in FIG. 5, the humidification unit (40) was pumped up by a water tank (41) for storing water, a water wheel (42) for pumping water from the water tank (41), and a water wheel (42). A humidification rotor (43) that applies water to the air and a drive motor (44) for rotationally driving the humidification rotor (43) are provided.

  The water tank (41) constitutes a horizontally long water container whose upper side is open. The water tank (41) is installed in a lower space in the casing (11), and is configured to be freely taken in and out through an outlet (11b) of the casing (11) (see FIG. 1). Thereby, the user etc. can replenish the water tank (41) with the water for humidification suitably. Further, a bearing member (41a) for rotatably holding the water wheel (42) is erected on the bottom surface of the water tank (41).

  The water turbine (42) is formed in a substantially disk shape that is flat in the front-rear direction, and a rotating shaft (42a) projects from the axial center. The rotating shaft (42a) is pivotally supported at the upper end of the bearing member (41a). The water wheel (42) is rotatably provided so that a part (predetermined part including the lower end portion) of the water tank (41) is immersed in the humidified water, and constitutes a rotating member.

  The water wheel (42) is formed with a plurality of rear recesses (42b) around the axis of the rear side surface (side surface facing the humidification rotor (43)). The rear concave portion (42b) constitutes a humidifying concave portion for pumping humidified water toward the humidifying rotor (43). The plurality of rear recesses (42b) have a substantially trapezoidal opening whose width is increased toward the radially outer side. The circumferential width of the opening of the rear recess (42b) is narrower than the circumferential width of the internal space of the rear recess (42b). Furthermore, the inner wall on the radially inner side of the rear concave portion (42b) is inclined so as to gradually approach the axial center side toward the opening end. The rear recesses (42b) are arranged at equal intervals in the circumferential direction at the radially outer end of the water turbine (42). In the water wheel (42) during the rotating operation, the position where the rear concave portion (42b) is immersed in the water of the water tank (41) and the position where the water tank (41) is drawn out are alternately displaced.

  Further, a gear (42c) is integrally formed on the rear side surface of the water turbine (42) at a portion near the axial center. The gear (42c) is configured to mesh with a driven gear (43a) of a humidifying rotor (43) described later.

  The humidification rotor (43) has an annular driven gear (43a) and a disk-shaped moisture absorbing member (43b) that is fitted and held in the driven gear (43a). The hygroscopic member (43b) is made of a non-woven fabric having water absorption. The humidification rotor (43) is rotatably held via a rotating shaft at a position higher than the water level when the water tank (41) is full. Moreover, the humidification rotor (43) is arrange | positioned so that the predetermined site | part containing the lower end may contact substantially with a water turbine (42). That is, the humidification rotor (43) has a portion that coincides with the rear recess (42b) of the water turbine (42) in the axial direction. Thereby, the humidification rotor (43) is configured such that the humidifying water (43b) can absorb the humidified water pumped up by the rear concave portion (42b) of the water wheel (42).

  The drive motor (44) has a drive gear (44a). The drive gear (44a) meshes with the driven gear (43a) of the humidification rotor (43) via the pinion (45). That is, when the drive motor (44) rotationally drives the drive gear (44a), the pinion (45) and the driven gear (43a) rotate, and further the water wheel (42) that meshes with the driven gear (43a) rotates. .

<Configuration of air purification unit>
FIG. 6 is a diagram illustrating a configuration example of the air cleaning unit (50). The air cleaning unit (50) is disposed in the casing (11), and includes a discharge processing unit (51), a power source (52), a control unit (72), and a sensor unit (80) for detecting absolute humidity. And have. The air cleaning unit (50) generates active species, supplies the generated active species to the air passage (14) and the like, and cleans air and humidified water. The details of the air cleaning unit (50) will be described.

  FIG. 6 shows a side view of the discharge processing section (51). The discharge processing section (51) includes a discharge electrode (61) and a counter electrode (66). The power supply (52) that supplies power to the discharge processing section (51) is a high-voltage DC power supply, and applies a voltage between the discharge electrode (61) and the counter electrode (66). Specifically, the discharge electrode (61) is connected to the positive electrode side of the power source (52), and the counter electrode (66) is connected to the negative electrode side (ground side) of the power source (52). In the power source (52), so-called constant current control is performed in which the discharge current flowing between the discharge electrode (61) and the counter electrode (66) is controlled to be constant. The discharge processing unit (51) generates active species by streamer discharge in the air, and diffuses the generated active species into the air flow.

  The sensor unit (80) includes a temperature sensor (82) and a relative humidity sensor (84). The temperature sensor (82) detects the temperature of the air flowing in from the outside of the air treatment device (10), and the relative humidity sensor (84) detects the relative humidity of the air. The control unit (72) obtains the absolute humidity based on the output of the temperature sensor (82) and the output of the relative humidity sensor (84).

  Specifically, the control unit (72) obtains the temperature from the output of the temperature sensor (82) and the relative humidity from the output of the relative humidity sensor (84), and based on the obtained temperature and relative humidity, Find the humidity. If the saturated water vapor pressure is determined from the temperature and the saturated water vapor pressure is multiplied by the relative humidity, a value corresponding to the absolute humidity can be easily obtained. The control unit (72) controls the power source (52) so that the discharge output of the discharge processing unit (51) becomes a value corresponding to the obtained absolute humidity.

  Active species generated during streamer discharge include OH radicals generated from moisture in the air. For this reason, when the water | moisture content in air is little, ie, when the absolute humidity of air is low, the active species produced | generated will decrease. In other words, assuming that the discharge output of the discharge processing section (51) is constant, the amount of active species generated per unit time tends to decrease as the absolute humidity of the air is lower. Therefore, the control unit (72) controls the power source (52) so that the time average of the discharge output of the discharge processing unit (51) increases as the absolute humidity of the air decreases. For example, the power source (52) changes the discharge output of the discharge processing unit (51) by changing the magnitude of the current supplied to the discharge processing unit (51) in accordance with the control unit (72).

  The control unit (72) may control the power source (52) so that the ability of the discharge processing unit (51) to generate active species is constant regardless of the absolute humidity of the air. More specifically, for example, the control unit (72) sets the discharge output of the discharge processing unit (51) so as to obtain a predetermined ability to generate active species when the absolute humidity is low, The power supply (52) is controlled so that the discharge output becomes smaller as the absolute humidity is higher and the predetermined ability to generate active species is maintained.

  The power source (52) intermittently supplies current to the discharge processing unit (51), and changes the duty ratio of the current supplied to the discharge processing unit (51), whereby the discharge output of the discharge processing unit (51) You may change the time average. The time average may be an average value for each predetermined period or a moving average for a predetermined period. When the time average of the discharge output of the discharge processing unit (51) is changed by changing the duty ratio, the output start and stop repetition cycle may be, for example, several minutes or shorter. May be. The power source (52) may change the time average of the discharge output of the discharge processing unit (51) by changing the power supplied to the discharge processing unit (51) instead of the current.

  FIG. 7 is a graph showing an example of control by the control unit (72). As shown in FIG. 7, for example, the control unit (72) smoothly increases the time average (or discharge output) of the discharge output of the discharge processing unit (51) in accordance with a decrease in the absolute humidity of the air. That is, the control unit (72) controls the power source (52) so that the time average of the discharge output of the discharge processing unit (51) increases as the absolute humidity of the air decreases.

  FIG. 8 is a graph showing another example of control by the control unit (72). As shown in FIG. 8, for example, the control unit (72) changes the time average (or discharge output) of the discharge output of the discharge processing unit (51) stepwise according to the absolute humidity of the air. Thus, in the predetermined range of absolute humidity, the time average of the discharge output of the discharge processing unit (51) may not change. That is, as shown in FIG. 8, when the absolute humidity of the air is lower than a predetermined value, the control unit (72) turns the power source (52) so that the time average of the discharge output of the discharge processing unit (51) becomes larger. You may control.

  FIG. 9 is a graph showing still another example of control by the control unit (72). As shown in FIG. 9, the control unit (72) may change the time average (or discharge output) of the discharge output of the discharge processing unit (51) more finely according to the absolute humidity of the air.

  In an actual environment, the lower the air temperature, the lower the absolute humidity is. That is, it can be said that there is a high positive correlation between air temperature and absolute humidity. Therefore, the control unit (72) may use temperature instead of absolute humidity. Specifically, the control unit (72) switches the power source (52) so that the time average of the discharge output of the discharge processing unit (51) increases as the temperature detected using the temperature sensor (82) decreases. You may control. In this case, the sensor unit (80) needs to have the temperature sensor (82), but does not need to have the relative humidity sensor (84). Even when controlling according to temperature, the power supply (52) changes the discharge output of the discharge processing section (51) by changing the magnitude of the current supplied to the discharge processing section (51) according to the control section (72). Alternatively, the time average of the discharge output of the discharge processing unit (51) may be changed by changing the duty ratio of the current supplied to the discharge processing unit (51).

  When the air treatment device (10) performs humidification operation, it can be expected that the absolute humidity of indoor air will increase, but when the air treatment device (10) does not perform humidification operation, such expectation is expected. Can not. Therefore, the control unit (72) turns the power source (52) so that the time average of the discharge output is larger when the humidification operation is not notified than when the humidification operation is notified. You may control.

  The discharge electrode (61) includes an electrode support member (62), a base portion (63), and a discharge needle (64). The electrode support member (62) is formed in a plate shape and is configured to support the base portion (63) and the discharge needle (64). The electrode support member (62) of the present embodiment is made of a metal material, but a conductive resin material may be used instead. The electrode support member (62) is arranged to face the counter electrode (66).

  The base portion (63) is configured by a block-shaped member that protrudes from the electrode support member (62) toward the counter electrode (66). Specifically, the base part (63) is formed in a rectangular parallelepiped shape that is flat in a direction (vertical direction in FIG. 6) in which the electrode support member (62) and the counter electrode (66) face each other. The base end side of the base part (63) is fixed to the electrode support member (62). A plurality of discharge needles (64) are fixed to the protruding end portion (63a) of the base portion (63). The base (63) extends in the arrangement direction of the plurality of discharge needles (64). Although the base part (63) of this embodiment is comprised with a metal material, it may replace with this and may use a conductive resin material.

  Each of the discharge needles (64) is formed in a rod shape or a line shape, and is fixed to the protruding end portion (63a) of the base portion (63). The plurality of discharge needles (64) are arranged in parallel with the electrode support member (62) and the counter electrode (66). The plurality of discharge needles (64) are arranged in the extending direction of the base portion (63) so as to be parallel to each other. The lengths of the plurality of discharge needles (64) in the longitudinal direction are equal to each other. In the present embodiment, one end of each discharge needle (64) is located on the same line.

  Each discharge needle (64) protrudes toward both ends of the discharge needle (64) from the fixed portion (64a) fixed to the protruding end portion (63a) of the base portion (63). And a pair of protrusions (64b). The fixing part (64a) of the discharge needle (64) is embedded in the protruding end part (63a) of the base part (63). The counter electrode (66) is formed in a plate shape. In the discharge processing section (51), the plurality of discharge needles (64) are arranged in the direction in which air flows.

  When voltage is applied from the power source (52) to the discharge electrode (61) and the counter electrode (66), streamer discharge occurs from the tip of the protrusion (64b) of the discharge needle (64) toward the counter electrode (66). Is done. By this streamer discharge, active species (radicals, ozone, fast electrons, excited molecules, etc.) are generated in the air. A part of the air containing the active species generated in the discharge treatment unit (51) is supplied to the prefilter (21) disposed on the most upstream side of the air purification unit (20) through the guide passage (16). The Further, the air containing the remaining active species is supplied into the water tank (41) via the transfer pipe (30). And this active species reacts with the to-be-processed component in the air or water, and this to-be-processed component is oxidatively decomposed and removed.

-Driving action-
In the air treatment device (10) according to the present embodiment, air is purified by the above-described air purification unit (20), and indoor humidification is simultaneously performed by the humidification unit (40).

  Specifically, first, the humidification rotor (43) and the water wheel (42) are rotationally driven by the drive motor (44). Further, when the centrifugal fan (18) is operated, indoor air is introduced into the air passage (14) through the suction port (12). Further, a high voltage is applied from the power source (52) between the electrodes (61, 66) of the discharge processing section (51). Further, a voltage is applied to the electrode of the ionization section (22) from the power source (52) or another power source.

  As shown in FIG. 2, the air flowing into the air passage (14) passes through the prefilter (21), captures dust, and then passes through the ionization section (22). In the ionization part (22), corona discharge is performed between the electrodes, and dust in the air is charged. The air that has flowed out of the ionization section (22) passes through the pleated filter (23). In the pleated filter (23), the charged dust is electrically attracted and captured. The air that has flowed out of the pleated filter (23) passes through the deodorizing member (24). In the deodorizing member (24), the component to be treated contained in the air is adsorbed by the adsorbent or is oxidized and decomposed by the catalyst.

  By the way, in the air passage (14), part of the air on the outlet side (positive pressure side) of the centrifugal fan (18) flows into the return passage (15). The air flowing through the return passage (15) is sent forward and flows through the discharge processing section (51). In the discharge processing section (51), streamer discharge is performed between the electrodes (61, 66) facing each other. As a result, in the discharge processing unit (51), the above-described active species are generated with the streamer discharge. Part of the air containing the active species joins with air flowing upstream of the prefilter (21) through the return passage (15). Therefore, in the air passage (14), active species flow from the inflow end to the outflow end, and a reaction time between the component to be treated and the active species in the air is secured, thereby improving the deodorization performance.

  On the other hand, the remaining air containing the active species flowing through the return passage (15) is supplied into the water tank (41) through the transfer pipe (30) branched in the middle of the passage. This active species is used for sterilization of humidified water by removing toxic substances contained in water by oxidative decomposition.

  Here, the control unit (72) controls the discharge output of the discharge processing unit (51) based on the absolute humidity of the air. Specifically, for example, as shown in FIGS. 7 to 9, the control unit (72) controls the power source (52) so that the time average of the discharge output of the discharge processing unit (51) increases as the absolute humidity of the air decreases. ) To control.

  During the humidification operation, the air that has passed through the deodorizing member (24) flows into the humidification rotor (43). Here, in the humidification unit (40), the water turbine (42) rotates, so that the humidified water in the water tank (41) is appropriately supplied to the moisture absorbing member (43b) of the humidification rotor (43). Specifically, in the water turbine (42), the rear recess (42b) is immersed in the humidified water stored in the water tank (41). Thereby, in humidified water, humidified water penetrate | invades and is hold | maintained in a back side recessed part (42b). The rear concave portion (42b) in the state of holding the humidified water is pulled up from the humidified water and further displaced upward. When the rear recess (42b) gradually approaches the humidification rotor (43), the humidified water retained in the rear recess (42b) gradually flows out of the rear recess (42b) by its own weight. . When the rear concave portion (42b) is displaced to the uppermost position, substantially all of the humidified water in the rear concave portion (42b) flows out.

  The humidified water flowing out from the rear concave portion (42b) comes into contact with the humidifying rotor (43) adjacent to the rear concave portion (42b) and is absorbed by the moisture absorbing member (43b). With such an operation, in the humidification unit (40), humidified water is continuously supplied to the humidification rotor (43).

  In the humidification rotor (43), air circulates through the portion replenished with moisture. As a result, the humidified water contained in the moisture absorbing member (43b) is released into the air, whereby the air is humidified. The air purified and humidified as described above is supplied into the room through the air outlet (13).

-Effect of the embodiment-
As described above, according to the present embodiment, the time average of the discharge output of the discharge processing unit (51) increases as the absolute humidity decreases, so that the number of active species generated when the absolute humidity is low is reduced. It is possible to suppress the decrease in ability to decompose harmful substances and the like. Therefore, the fluctuation | variation of the capability to produce | generate an active species accompanying the change of the absolute humidity of air can be suppressed. Further, when the absolute humidity is high, the discharge output of the discharge processing section (51) becomes small, so that power consumption can be suppressed while maintaining the amount of active species generated, and the discharge electrode (61) and the counter electrode ( 66) can be extended.

  Each functional block in this specification may typically be realized by hardware. Alternatively, some or all of each functional block can be implemented in software. For example, such a functional block can be realized by a processor and a program executed on the processor. In other words, each functional block described in the present specification may be realized by hardware, may be realized by software, or may be realized by any combination of hardware and software.

  As described above, the present invention is useful for an air cleaning unit or the like having a discharge processing unit that performs streamer discharge.

11 Casing
18 fans
20 Air purification section
50 Air purification unit
51 Discharge treatment section
52 Power supply
72 Control unit
80 Sensor section
82 Temperature sensor
84 Relative humidity sensor

A first air cleaning unit according to the present disclosure includes a discharge processing unit (51) that generates radicals by discharge in air, a power supply (52) that supplies power to the discharge processing unit (51), and a humidification unit that humidifies air. (40) and so that the time average of the discharge output of the discharge processing section (51) increases as the absolute humidity of the air decreases, or the humidifying operation is performed when the humidifying operation is not notified. And a control unit (72) for controlling the power source (52) so that the time average of the discharge output is larger than the case of being notified.

According to this, since the time average of the discharge output of the discharge processing section (51) increases as the absolute humidity decreases, it is possible to suppress a decrease in the ability to generate radicals when the absolute humidity is low. For this reason, the fluctuation | variation of the capability to produce | generate a radical accompanying the change of the absolute humidity of air can be suppressed. Further, when not notified that the humidifying operation is performed, the time average of the discharge output is made larger than when notified that the humidifying operation is performed. When the humidification operation is not performed, it can be assumed that the absolute humidity is relatively low. Therefore, it is possible to suppress a decrease in the ability to generate radicals in such a case.

An air treatment device according to the present disclosure includes a first air cleaning unit (50), a casing (11) in which an air passage is formed, and a fan (18) that sucks air outside the casing (11) into the air passage. And an air purification part (20) disposed in the air passage and collecting dust from the air in the air passage. The air cleaning unit (50) is disposed in the casing (11) and supplies the generated radicals to the air passage.

According to this, since the time average of the discharge output of the discharge processing unit (51) increases as the absolute humidity decreases, the air processing apparatus suppresses the decrease in the ability to generate radicals when the absolute humidity is low. Can do. Moreover, when not notified that the humidifying operation is performed, it is possible to suppress a decrease in the ability to generate radicals .

Claims (6)

A discharge treatment section (51) for generating active species by discharge in air;
A power supply (52) for supplying power to the discharge processing section (51);
The time average of the discharge output of the discharge processing unit (51) increases as the absolute humidity of the air decreases, or when the humidifying operation is not notified, the humidifying operation is notified. And a control unit (72) for controlling the power source (52) so that the time average of the discharge output is larger than that of the case. In claim 1,
A temperature sensor (82) for detecting the temperature of the air;
A relative humidity sensor (84) for detecting the relative humidity of the air;
The air purifying unit, wherein the control unit (72) obtains an absolute humidity based on the output of the temperature sensor (82) and the output of the relative humidity sensor (84). In claim 1,
A temperature sensor (82) for detecting the temperature of the air;
The control unit (72) controls the power source (52) so that the time average of the discharge output is increased according to a decrease in temperature detected using the temperature sensor (82). Air purification unit. In any one of Claims 1-3,
The air cleaning unit, wherein the power source (52) changes the discharge output by changing a magnitude of a current supplied to the discharge processing section (51). In any one of Claims 1-3,
The power source (52) intermittently supplies current to the discharge processing section (51), and changes the duty ratio of the current supplied to the discharge processing section (51), thereby changing the time of the discharge output. An air purification unit characterized by changing the average. An air purification unit (50) according to claim 1;
A casing (11) in which an air passage is formed;
A fan (18) for sucking air outside the casing (11) into the air passage;
An air purification unit (20) disposed in the air passage and collecting dust from the air in the air passage;
The air cleaning device (50) is disposed in the casing (11) and supplies the generated active species to the air passage.

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