JP2017223437A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner which allows a user to easily recognize the fact that the air in a habitable room contains PM2.5 of the concentration which has a harmful influence on health.SOLUTION: An air cleaner includes a dust sensor capable of extracting the concentration of PM2.5 in the air, and a display part disposed in a front upper part of a housing and for performing display regarding the concentration of the PM2.5 in the air. The display part is formed by a two-color LED having a red LED element and a green LED element and it performs display in an orange color when the concentration of PM2.5 in the air has surpassed a first predetermined value, and performs display in a red color when the concentration of PM2.5 in the air has surpassed a second predetermined value higher than the first predetermined value.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an air cleaner equipped with a dust sensor.

  Patent Document 1 discloses a conventional air cleaner. This air cleaner opens a suction inlet and a blower outlet in the housing | casing installed in the living room, and the ventilation path which connects a suction inlet and a blower outlet is provided in a housing | casing. A blower is disposed in the blower passage, and a filter that collects dust in the air is disposed on the upstream side of the blower in the blower passage.

  A dust sensor that detects air contamination is provided on a side surface of the casing near the air outlet. The air purifier varies the blower to a plurality of air blowing levels having different rotation speeds based on a plurality of dirt degrees ranked according to air dirt.

  In the air cleaner having the above configuration, when the operation is started, the blower is driven and air is sucked from the suction port. The air sucked from the suction port is sent out from the outlet into the living room after dust is collected by the filter. The blower is driven at a higher blowing speed than when it is low when the degree of contamination is high. Thereby, when the degree of contamination is low, increase in power consumption and noise can be suppressed to remove air contamination, and when the degree of contamination is high, air contamination can be quickly removed.

Japanese Patent Laying-Open No. 2006-15197 (page 8, FIGS. 1 and 2)

  In recent years, since fine particles such as PM2.5 in the air cause health damage, there is an increasing demand for an air cleaner capable of removing fine particles in the air. However, according to the conventional air cleaner, the degree of contamination does not increase when the concentration of dust does not increase even if the concentration of fine particles in the air increases, and the blower is not driven at a high blowing speed. . For this reason, there was a possibility that fine particles in the air could not be sufficiently removed.

  An object of this invention is to provide the air cleaner which can fully remove the microparticles in air, suppressing the increase in power consumption and a noise.

  In order to achieve the above object, the present invention provides a dust sensor capable of extracting the concentration of PM2.5 in the air and a display relating to the concentration of PM2.5 in the air disposed on the front upper portion of the housing. In the air cleaner provided with a display unit, the display unit is formed of a two-color LED having a red LED element and a green LED element, and the concentration of PM2.5 in the air has a first predetermined value. When it exceeds, it is displayed in orange, and when the concentration of PM2.5 in the air exceeds a second predetermined value higher than the first predetermined value, it is displayed in red.

In the air cleaner having the above-described configuration, the present invention is provided in the air passage connecting the air inlet for sucking air and the air outlet for blowing out the air, the blower disposed in the air passage, and the air passage. A filter that collects dust in the air, and the housing, the blower is changed to a plurality of blowing levels having different rotational speeds based on a plurality of dirt levels ranked according to the concentration of dust, When the level of dirt is high, the air flow level is set to be higher than when the level is low, and when the concentration of PM2.5 is high for a predetermined level of dirt, the level of air blow is further increased than when the level is low. It is preferable to increase the rotational speed.

  In the air cleaner configured as described above, it is more preferable that the speaker further includes a speaker, and a sound or a buzzer sound is output from the speaker when the concentration of PM2.5 in the air exceeds a predetermined value.

  According to the present invention, a dust sensor capable of extracting the concentration of PM2.5 in the air, and a display unit arranged on the front upper portion of the housing for displaying the concentration of PM2.5 in the air are provided. In the air purifier, the display unit is formed of a two-color LED having a red LED element and a green LED element, and is orange when the concentration of PM2.5 in the air exceeds a first predetermined value. Display is performed, and when the concentration of PM2.5 in the air exceeds a second predetermined value higher than the first predetermined value, it is displayed in red. Thereby, the user can easily recognize that PM2.5 having a concentration affecting health is contained in the air in the room.

The perspective view which shows the air cleaner of 1st Embodiment of this invention. Side surface sectional drawing which shows the air cleaner of 1st Embodiment of this invention. The front view which shows the display part of the air cleaner of 1st Embodiment of this invention. The front view which shows the operation part of the air cleaner of 1st Embodiment of this invention. The perspective view which shows the humidification part of the air cleaner of 1st Embodiment of this invention. The perspective view which shows a mode that the water supply tank of the humidification part of the air cleaner of 1st Embodiment of this invention was removed. Side surface sectional drawing which shows the humidification part of the air cleaner of 1st Embodiment of this invention. Side surface sectional drawing which shows a mode that the water supply tank of the humidification part of the air cleaner of 1st Embodiment of this invention was removed. The flowchart which shows operation | movement of the air cleaner of 1st Embodiment of this invention. Side surface sectional drawing which shows a mode that air is sent ahead of the air cleaner of 1st Embodiment of this invention. Side surface sectional drawing which shows a mode that air is sent out upwards of the air cleaner of 1st Embodiment of this invention. The image figure which shows the lighting pattern of the center light emission part and the both-sides light emission part of the display part of the air cleaner of 1st Embodiment of this invention. Side surface sectional drawing which shows the air cleaner of 2nd Embodiment of this invention. The image figure which shows the lighting pattern of the center light emission part of the display part of the air cleaner of 2nd Embodiment of this invention, and a both-sides light emission part. Side surface sectional drawing of the float periphery of the humidification part of the air cleaner of 3rd Embodiment of this invention.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG.1 and FIG.2 has each shown the perspective view and side sectional drawing of the air cleaner of 1st Embodiment. In FIG. 2, an arrow S indicates the flow of air. The air cleaner 1 has a housing 2 that is installed on a floor surface or the like in a living room by opening a suction port 3 and air outlets 4 and 5. The suction port 3 opens on the back surface of the housing 2, and the air outlets 4 and 5 open on the front upper portion and the rear upper surface of the housing 2, respectively. The height of the air outlet 4 is substantially the same as the bed surface of a bed (not shown) in the living room.

The air outlets 4 and 5 are respectively provided with wind direction plates 14 and 15 that change the air direction. Wind direction plate 14
Is formed of a flat plate and is supported by a pivot shaft portion 14a provided at the rear portion of the wind direction plate 14 so as to be pivotable in the vertical direction. The wind direction plate 15 is formed of a flat plate, and is supported by a rotation shaft portion 15a provided at the front portion of the wind direction plate 15 so as to be rotatable in the vertical direction.

  The wind direction plates 14 and 15 open and close the air outlets 4 and 5, respectively. The wind direction plate 14 can be rotated at a maximum of about 120 ° in the opening direction from the position where the air outlet 4 is closed (see FIG. 11). The wind direction plate 15 can be rotated by about 42 ° at the maximum in the opening direction from the position where the air outlet 5 is closed (see FIG. 10).

  An air passage 8 that connects the suction port 3 and the air outlets 4 and 5 is provided in the housing 2. A filter unit 9, a humidifier 20, a blower 10, an ion generator 11, and a damper 12 are provided in the air passage 8 in order from the air inlet 3 toward the air outlets 4 and 5 (from the upstream side to the downstream side of the airflow). .

  The ventilation passage 8 has a first branch passage 8 a and a second branch passage 8 b that branch downstream from the ion generator 11. The first branch passage 8a and the second branch passage 8b communicate with the outlets 4 and 5, respectively, and the cross-sectional area of the air flow path of the first branch passage 8a is larger than the cross-sectional area of the air flow path of the second branch passage 8b. Is also getting smaller.

  The damper 12 is formed in a thin plate shape, and is supported by the rotation shaft portion 12a so as to be rotatable in the vertical direction. The damper 12 can be rotated by a maximum of about 180 ° from the position where the first branch passage 8a is closed (see FIG. 11) as shown in FIG. The damper 12 changes the air volume balance of the first branch passage 8a and the second branch passage 8b.

  The blower 10 is formed by a sirocco fan driven by a motor 10a, and sucks in an axial direction and exhausts in a circumferential direction. The filter unit 9 is provided with a pre-filter, a deodorizing filter, and a dust collection filter (all not shown) in order from the air suction side in the frame 9a. A filter pressing member (not shown) is disposed between the prefilter and the deodorizing filter.

  The prefilter is formed by welding a polypropylene mesh (not shown) to a rectangular frame (not shown) having a plurality of rows and rows of windows made of synthetic resin such as ABS. Large dust in the intake air can be collected by the prefilter.

  The deodorizing filter has a rectangular bag made of polypropylene fiber or polyester fiber. The bag body is divided into a plurality of storage chambers having a uniform size in the vertical direction. Each storage chamber is packed with an adsorbent such as activated carbon uniformly dispersed. Thereby, the odor component in air can be adsorbed and air can be deodorized. Further, the filter pressing member holds the deodorizing filter and prevents positional displacement.

  The dust collection filter is composed of a HEPA filter, and a frame material (not shown) is welded by hot melt so as to cover the filter material (not shown). Fine dust in the air and fine particles such as PM2.5 having a particle size smaller than a predetermined particle size (for example, 3 μm) can be collected by the dust collecting filter.

  As will be described in detail later, the humidifying unit 20 immerses the lower part of the humidifying filter 23 in the water in the tray 22 and humidifies the air passing through the humidifying filter 23. Thereby, the humidified air (humidified air) is sent out from the blowout ports 4 and 5.

The ion generator 11 has an ion generation surface 11 a that generates ions when a high voltage is applied, and the ion generation surface 11 a faces the air passage 8. A voltage having an AC waveform or an impulse waveform is applied to the ion generation surface 11a. When the applied voltage of the ion generating surface 11a is a positive voltage, positive ions mainly composed of H ⁺ (H ₂ O) m are generated, and when a negative voltage is applied, negative ions mainly composed of O ₂ ⁻ (H ₂ O) n are generated. Occur. Here, m and n are integers. H ⁺ (H ₂ O) m and O ₂ ⁻ (H ₂ O) n aggregate on the surface of airborne bacteria and odor components and surround them.

Then, as shown in the formulas (1) to (3), the active species [.OH] (hydroxyl radical) and H ₂ O ₂ (hydrogen peroxide) are aggregated and formed on the surface of the microorganism or the like by collision. Destroy airborne bacteria. Here, m ′ and n ′ are integers. Therefore, sterilization and odor removal in the room can be performed by generating positive ions and negative ions and sending them out from the outlets 4 and 5.

H ⁺ (H ₂ O) m + O ₂ ⁻ (H ₂ O) n → OH + 1 / 2O ₂ + (m + n) H ₂ O (1)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ 2 OH + O ₂ + (m + m ′ + n + n ′) H ₂ O (2)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ H ₂ O ₂ + O ₂ + (m + m ′ + n + n ′) H ₂ O (3)
Moreover, when positive ions and negative ions come into contact with the user's skin, hydroxyl groups (OH groups) adhere to the skin and the skin surface becomes hydrophilic. This makes it easier for water molecules to adhere to the skin surface and moisturizes the skin.

  In the vicinity of the filter unit 9, a dust sensor (not shown) and an odor sensor (not shown) are provided. The dust sensor is composed of an optical sensor having a light emitting element and a light receiving element, and detects the concentration of dust in the air based on the output pulse width output from the light receiving element. Further, it is possible to distinguish between PM2.5 and dust having a particle size larger than PM2.5 by the pulse waveform of the output voltage of the dust sensor. For example, the pulse waveform of PM2.5 has a waveform having a gentle peak, and the pulse waveform of dust having a large particle diameter has a waveform having a sharp peak. Thereby, the density | concentration of PM2.5 in air can be extracted from the detection result of a dust sensor. The odor sensor detects the concentration of odor components in the air.

  An illuminance sensor 13 (see FIG. 4) is provided on the front surface of the housing 2. The illuminance sensor 13 detects the illuminance in the living room.

  Display units 30, 40, and 50 are provided around the air outlet 4 at the upper front of the housing 2. FIG. 3 shows a front view of the display units 30, 40, 50 of the air cleaner 1. In addition, illustration of the wind direction board 14 is abbreviate | omitted in FIG. The display unit 30 (second display unit) is formed to extend in the left-right direction, and includes a central light emitting unit 31, both side light emitting units 32, and a lamp cover 35. The lamp cover 35 is made of a translucent resin and covers the central light emitting unit 31 and the both side light emitting units 32.

  The central light emitting unit 31 is disposed in the central portion of the display unit 30 in the left-right direction, and is formed by a two-color LED having a red LED element and a green LED element. The central light emitting unit 31 emits red light when only the red LED is turned on, emits green light when only the green LED is turned on, and emits orange light when the red LED and the green LED are turned on.

  Both side light emitting units 32 are arranged on both sides of the central light emitting unit 31, and are composed of a plurality of different color single color LEDs 32R, 32T, 32G. The single color LEDs 32R, 32T, and 32G emit red light, orange light, and green light, respectively. The monochromatic LEDs 32R, 32T, and 32G are arranged away from the central light emitting unit 31 in this order. That is, the monochromatic LEDs 32R, 32T, and 32G are arranged in this order from the center of the display unit 30 toward the side end.

  The single color LEDs 32R, 32T, 32G are arranged at equal intervals, and the distance D1 between the central light emitting unit 31 and the single color LED 32R adjacent to the central light emitting unit 31 is between the adjacent single color LEDs 32R, 32T or between the adjacent single color LEDs 32G, 32T. Is longer than the distance D2.

The display unit 40 ( first display unit) is arranged to the left of the outlet 4 and has a plurality of LEDs (not shown), and the concentration of fine particles such as PM2.5 in the air is a predetermined value (for example, 35 μg). / M ³ ), the character 40a “PM2.5” is displayed.

  The display unit 50 is arranged to the right of the air outlet 4 and has a plurality of LEDs (not shown). When the concentration of the odor component in the air exceeds a predetermined value, the display unit 50 displays a pattern P composed of a plurality of wavy lines W. indicate.

  An operation unit 6 is provided on the front upper surface of the housing 2. FIG. 4 is a front view of the operation unit 6. The operation unit 6 includes a plurality of buttons 6a to 6d, and performs an operation setting of the air cleaner 1 by a user's operation. By operating the button 6a, the number of rotations of the blower 10 can be changed to change the amount of air sent from the outlets 4 and 5. The air blowing direction can be changed by rotating the wind direction plates 14 and 15 by operating the button 6b. By the operation of the button 6c, it is possible to switch between a humidified state in which humidification is performed by the humidifying unit 20, and a non-humidified state in which humidification by the humidifying unit 20 is stopped and air is blown.

  By operating the button 6d, the amount of ions delivered forward can be increased with respect to the standard state. At this time, the wind direction plate 14 is rotated 60 ° upward from the position where the air outlet 4 is closed, and the damper 12 is rotated 85 ° in the opening direction from the position where the first branch passage 8a is closed (see FIG. 10). Thereby, the airflow containing ions is guided to the first branch passage 8a and sent forward from the outlet 4.

  FIG. 5 shows a perspective view of the humidifying unit 20 as viewed from above. FIG. 6 shows a perspective view of the humidifying unit 20 with the water supply tank 21 removed. FIG. 7 shows a side sectional view of the humidifying unit 20. FIG. 8 shows a side sectional view of the humidifying unit 20 with the water supply tank 21 removed. The humidification unit 20 includes a water supply tank 21, a tray 22, a humidification filter 23, and a water level sensor 24. The tray 22 is detachably attached to the housing 2, and the water supply tank 21 and the humidifying filter 23 are detachably attached to the tray 22. Thereby, cleaning, maintenance, etc. of the humidification part 20 can be performed easily.

  The water supply tank 21 is composed of a cylindrical container, and is formed by, for example, blow molding of a synthetic resin material such as PET (polyethylene terephthalate) or PP (polypropylene). An opening (not shown) is formed at one end surface of the water supply tank 21, and the opening is closed by screwing a tank cap 21 a having a valve mechanism 29 (see FIG. 7) into the opening. The other end surface of the water supply tank 21 is provided with a gripping portion 21b for gripping when the water supply tank 21 is attached or detached. The tank cap 21 a of the water supply tank 21 taken out from the tray 22 can be removed to supply water to the water supply tank 21.

  The tray 22 has a substantially box shape with an open upper surface, and is formed of a resin molded product. The tray 22 includes a filter housing portion 22a that houses the humidifying filter 23, and a tank housing portion 22b that is adjacent to the filter housing portion 22a and houses the water supply tank 21. A receiving portion 22e that faces the valve mechanism 29 of the tank cap 21a protrudes from the bottom surface of the tank housing portion 22b.

  A partition plate 22c is provided between the filter housing portion 22a and the tank housing portion 22b, and the filter housing portion 22a and the tank housing portion 22b communicate with each other through a communication port 22d formed in the partition plate 22c.

  The humidifying filter 23 has a filter body 23a such as a nonwoven fabric having air permeability and water absorption, and is formed in a disk shape. The filter body 23a is held by a cylindrical frame body 25 whose axial direction is horizontal. The frame body 25 supports the filter body 23a by radial rims 25b disposed on both end faces in the axial direction, and the filter body 23a is exposed between the rims 25b. Further, the frame body 25 is formed with an arcuate shielding part 25c on a part of both end faces in the axial direction. A rack 25 a is formed on the peripheral surface of the frame 25, and the rack 25 a meshes with a pinion (not shown) provided in the housing 2. The pinion is rotated by a motor (not shown) provided in the housing 2. Thereby, the humidification filter 23 can be rotated in a vertical plane.

  When the shielding portion 25c of the frame body 25 is arranged at the lower end and the humidification filter 23 is stopped from rotating, the filter body 23a is shielded from the water in the tray 22 by the shielding portion 25c. Thereby, the air cleaner 1 will be in a non-humidified state. When the humidification operation is instructed by operating the button 6c, the humidification filter 23 rotates intermittently. The filter body 23a is immersed in the water in the tray 22 by the rotation of the humidifying filter 23, and water penetrates the entire filter body 23a by capillary action. Thereby, the air cleaner 1 will be in a humidified state.

  The water level sensor 24 has a float 24a and a reed switch (not shown). The float 24a is pivotally supported on the guide member 26 by a support shaft 241a. The float 24a is formed by holding a foamed resin such as polystyrene foam by the frame body 242a, and can float on water. Further, a magnet is held on the frame body 242a. The reed switch is provided in the housing 2 at a position facing the magnet with the side wall surface of the tray 22 interposed therebetween. The reed switch is composed of a magnetic sensor, and performs switching by detecting the magnetism of the magnet of the float 24a.

  The bottom surface of the tray 22 abuts on the float 24a that has been lowered due to a drop in the water level and regulates the lower limit position of the float 24a. Thereby, the bottom surface of the tray 22 constitutes a restricting portion that restricts the lower limit position of the float 24a. The plate-shaped guide member 26 is erected in a U shape so as to surround the receiving portion 22e on the bottom surface of the tank housing portion 22b, and the water from the water supply tank 21 is allowed to flow between the float 24a and the bottom surface of the tray 22. invite.

  In the humidifying unit 20, when the float 24a floats in water within a predetermined water level range, the magnet faces the reed switch and the reed switch is turned on, for example. When the water in the tray 22 is greatly reduced by continuing the humidified state, the float 24a rotates clockwise in FIG. 7 and contacts the bottom surface of the tray 22 as shown in FIG. At this time, the magnet is separated from the reed switch, and the reed switch is turned off, for example. Thereby, it is notified via the display part 30 etc. that water supply is required.

  When the full water supply tank 21 is attached to the tank housing portion 22b, the valve mechanism 29 is opened by the receiving portion 22e (see FIG. 6), and the water in the water supply tank 21 is supplied into the tray 22. At this time, the water in the water supply tank 21 is guided between the float 24 a and the bottom surface of the tray 22 by the guide member 26. As a result, even when the float 24a adheres to the bottom surface of the tray 22 due to the scale of the remaining water in the tray 22, due to the collision with the float 24a of the water that has flowed in vigorously from the water supply tank 21, Adhesion can be easily released. Therefore, the float 24a can be surely lifted, and erroneous detection of the water level sensor 24 can be prevented.

  When the water level in the tray 22 rises and air no longer flows into the water supply tank 21 via the valve mechanism 29, water supply from the water supply tank 21 to the tray 22 is stopped. Thereby, water is supplied from the water supply tank 21 to the tray 22 in accordance with the water level of the tray 22, and the stored water level of the tray 22 is maintained substantially constant.

  FIG. 9 is a flowchart showing the operation of the air cleaner 1. When the operation of the air cleaner 1 is started by the operation of the operation unit 6, the blower 10 is driven. Thereby, the air in the living room is sucked from the suction port 3 and flows through the air passage 8. At this time, the filter unit 9 collects dust in the air and deodorizes the air.

In step # 1, the illuminance in the room is detected by the illuminance sensor 13. Step # illuminance in 2 at room whether lower than a predetermined lower limit value I ₀ is judged. Here, the lower limit value I ₀ can be set to, for example, the illuminance when the indoor lighting device (not shown) in the room is turned off at night. If the illuminance in the living room is lower than the lower limit I ₀ , the process proceeds to step # 3. If not, the process proceeds to step # 7. In step # 7, as shown in FIG. 2, air is sent forward and upward from the outlet 4 by the wind direction plate 14, and air is sent rearward and upward from the outlet 5 by the wind direction plate 15. Thereby, while drying of a user's skin can be prevented, the air in a living room can be purified.

  In step # 3, it is determined whether or not humidification by the humidifying unit 20 is performed. When the humidifying filter 23 is rotated by the operation of the button 6c and the air purifier 1 is in the humidified state, the process proceeds to step # 6, where the humidifying filter 23 stops rotating and the air purifier 1 is in the non-humidified state. If yes, go to Step # 4. In step # 4, it is determined whether or not the ion generator 11 is being driven. When the ion generator 11 is driven, the process proceeds to step # 6, and when not activated, the process proceeds to step # 5.

  In step # 6, as shown in FIG. 10, the air outlet 5 is closed by the wind direction plate 15, and the air is sent out from the air outlet 4 in the substantially horizontal direction by the air direction plate 14. That is, air is sent out to a user who is sleeping in a bed or the like at night. At this time, the damper 12 guides the airflow to the first branch passage 8a. Thereby, humidified air (humidified air) or air containing ions generated by the ion generator 11 can be directly applied to a user sleeping in a bed or the like at night. Therefore, the user's skin can be sufficiently moisturized, and the user's skin can be reliably prevented from drying.

  In step # 5, as shown in FIG. 11, the blower outlet 4 is closed by the wind direction plate 14, and the air is sent out from the blower outlet 5 to the rear upper side by the wind direction plate 15. That is, air is sent out avoiding a user who is sleeping in a bed or the like at night. This prevents air that is not humidified and does not contain ions generated by the ion generator 11 from being applied directly to a sleeping user in a bed or the like at night, and reliably prevents the user's skin from drying. be able to. Therefore, it is possible to clean the air in the living room and to prevent the user's uncomfortable feeling while sleeping and promote a good sleep.

  After Step # 5 to Step # 7, the process returns to Step # 1, and Step # 1 to Step # 7 are repeated.

  Table 1 shows the blower level of the blower 10 based on the degree of contamination, the odor rank, and the PM2.5 concentration rank. The degree of contamination is ranked in five levels from 0 to 4 according to the concentration of dust in the air detected by the dust sensor. The odor rank is classified into four levels of 0 to 3 according to the concentration of the odor component in the air detected by the odor sensor. The PM2.5 concentration rank is classified into three levels a to c according to the concentration of PM2.5 in the air extracted from the detection result of the dust sensor. As the concentration of dust, odor components and PM2.5 in the air increases, the degree of contamination is in the order of 0 to 4, the odor rank is in the order of 0 to 3, and the PM2.5 concentration rank is in the order of a to c. Get higher.

The blower 10 has “fine”, “weak”, “medium”, “strong” and “
Variable to multiple “maximum” blow levels. The rotation speed of the blower 10 increases in the order of “Fine”, “Weak”, “Medium”, “Strong” and “Maximum”. The blower 10 is driven at a higher blowing speed than when it is low when the dirt level and odor rank are high. In step # 5 to step # 7 of FIG. 9, for example, when the degree of dirt and the odor rank are “1”, the blower 10 is driven at the air blowing level of “medium”, and when the degree of dirt and the odor rank are “2”. On the other hand, the blower 10 is driven at a “strong” blow level.

  Also, the concentration of PM2.5 is extracted from the detection result of the dust sensor, and in step # 5 to step # 7 in FIG. 9, for example, when the PM2.5 concentration rank is “a” with respect to the degree of contamination “0”. The fan 10 is driven at a “fine” air blowing level. On the other hand, when the PM2.5 density rank is “b” or “c” with respect to the degree of contamination “0”, the blower 10 is driven at a “weak” or “medium” blowing level, respectively. That is, the rotational speed of the blower 10 is increased by raising the air blowing level further than when the PM2.5 concentration is high with respect to a predetermined degree of soiling than when it is low. Thereby, PM2.5 can be rapidly removed from the air.

  When the degree of contamination is “2” or higher, the rotational speed of the blower 10 is not changed even if the PM2.5 concentration rank is increased. However, since the blower level is “medium” or higher, PM2 in the air .5 can be removed quickly.

FIG. 12 shows an image diagram of the lighting pattern of the display unit 30 according to the degree of contamination. The solid oval indicates the lighting state of the central light emitting unit 31 and the both side light emitting units 32, and the broken oval indicates the extinguishing state of the central light emitting unit 31 and the both side light emitting units 32. When the degree of contamination is “0”, green light is emitted from the central light emitting unit 31 and green light is emitted from the monochromatic LEDs 32G on both sides.
Thereby, since green has a fresh image, the user can easily recognize that the concentration of dust in the air in the room is low.

  When the degree of contamination is “1”, orange light is emitted from the central light emitting unit 31, and the monochromatic LEDs 32G and 32T are lit on both side light emitting units 32 to emit green light and orange light, respectively. When the degree of contamination is “2”, orange light is emitted from the central light emitting section 31 and only the single color LED 32T is lit and both the light emitting sections 32 emit orange light. When the degree of contamination is “3”, red light is emitted from the central light emitting unit 31, and the monochromatic LEDs 32T and 32R are lit on both side light emitting units 32 to emit orange light and red light, respectively. When the degree of contamination is “4”, red light is emitted from the central light emitting unit 31, and only the single color LED 32R is lit and red light is emitted from the both side light emitting units 32.

  That is, the first ranks I to III ranked according to the dust concentration are displayed by the central light emitting unit 31, and the degree of dirt (second rank) obtained by further subdividing the first ranks I to III is displayed on both side light emitting units 32. Is displayed in a symmetrical pattern with respect to the central light emitting unit 31. Thereby, the display part 30 changes a display state according to the density | concentration of the dust in air. Moreover, the outline of the dirt state of the air due to dust can be displayed by the central light emitting unit 31 whose lighting position does not change, and the details of the dirt state of the air due to dust can be displayed by the both side light emitting units 32. Thus, the user can easily recognize the air contamination status due to dust.

  Moreover, since the monochromatic LED of the both-sides light emission part 32 lights so that it may become a symmetrical pattern with respect to the center light emission part 31, the beauty | look of the air cleaner 1 can be improved.

  At this time, the distance D1 between the central light emitting unit 31 and the single color LED 32R adjacent to the central light emitting unit 31 is longer than the distance D2 between the adjacent single color LEDs 32R and 32T or between the adjacent single color LEDs 32T and 32G. As a result, it is possible to prevent color mixing between the color of the emitted light from the central light emitting unit 31 and the color of the emitted light from the both side light emitting units 32. Therefore, it is possible to easily prevent the user from misidentifying the air contamination status.

  Moreover, the both side light emission part 32 light-emits the monochromatic LED of the position close | similar to the center light emission part 31 in order with the increase in a 2nd rank. Thereby, a user's misidentification about the dirt state of air can be prevented more easily.

  For example, when the degree of contamination is “3” or “4”, the central light emitting unit 31 and the single color LEDs 32R, 32T, and 32G may blink or blink. Thereby, a user can be alerted easily.

9, if the concentration of PM2.5 in the air exceeds a predetermined value (for example, 35 μg / m ³ ), the display unit 40 displays “PM2.5” as shown in FIG. "
The character 40a is displayed. Thereby, the user can easily recognize that PM2.5 having a concentration affecting health is contained in the air in the room.

The display unit 40 includes a two-color LED having a red LED element and a green LED element, and when the concentration of PM2.5 is, for example, 35 μg / m ³ or more and less than 70 μg / m ³ , the character 40a is displayed in orange. For example, in the case of 70 μg / m ³ or more, the characters 40a may be displayed in red.
As a result, the user can more easily recognize the presence of high concentration PM2.5.

  Further, in step # 5 to step # 7 in FIG. 9, when the concentration of the odor component in the air exceeds a predetermined value, the display unit 50 displays a pattern P composed of a plurality of wavy lines W. Thereby, the user can recognize easily the dirt of the air by an odor component.

  According to the present embodiment, the blower 10 is changed to a plurality of air blowing levels having different rotational speeds based on a plurality of dirt levels ranked according to the concentration of dust in the air, and is rotated more than when the dirt level is high. Set to a higher airflow level. Thereby, when the degree of contamination is low, increase in power consumption and noise can be suppressed to remove dust in the air, and when the degree of contamination is high, dust in the air can be quickly removed.

  Further, the concentration of PM2.5 (microparticles) having a particle size smaller than the predetermined particle size contained in the dust in the air is extracted from the detection result of the dust sensor, and the concentration of PM2.5 with respect to the predetermined contamination level. When the air pressure is high, the air blowing level is further increased than when the air pressure is low, and the rotational speed of the blower 10 is increased. Thereby, even if there is no increase in the degree of contamination, the air volume of the blower 10 increases as the concentration of PM2.5 increases. Therefore, PM2.5 in the air can be sufficiently removed while reliably collecting dust having a particle size larger than that of PM2.5. As a result, a user's health hazard can be easily prevented. Further, since the concentration of fine particles is extracted from the detection result of the dust sensor, it is possible to distinguish between PM2.5 and dust having a larger particle diameter than PM2.5. Thereby, the manufacturing cost of the air cleaner 1 can be reduced.

  Further, the air blowing level is varied based on the plurality of odor ranks and the degree of dirt that are ranked according to the concentration of the odor component, and the air blowing level is set at a higher rotation speed than when it is low when the odor rank is high. Thereby, dust and odor components in the air can be quickly removed.

  The display unit 30 (second display unit) is formed to extend in the left-right direction, has a central light emitting unit 31 and both side light emitting units 32, and changes the display state according to the concentration of dust in the air. Thereby, the user can grasp | ascertain the dirt condition of the air by dust.

  The first ranks I to III ranked according to the dust concentration are displayed by the central light emitting unit 31, and the dirt level (second rank) obtained by further subdividing the first ranks I to III is displayed on the both side light emitting units 32. Is displayed in a symmetrical pattern with respect to the central light emitting unit 31. As a result, it is possible to display the outline of the dirt situation of the air due to dust by the central light emitting unit 31 where the lighting position does not change, and to display the details of the dirt situation of the air due to dust by the both side light emitting parts 32. Therefore, the user can easily recognize the situation of air contamination by dust.

  Moreover, since the monochromatic LED of the both-sides light emission part 32 lights so that it may become a symmetrical pattern with respect to the center light emission part 31, the beauty | look of the air cleaner 1 can be improved.

  At this time, the distance D1 between the central light emitting unit 31 and the single color LED 32R is longer than the distance D2 between the adjacent single color LEDs 32R and 32T or between the adjacent single color LEDs 32G and 32T. As a result, it is possible to prevent color mixing between the color of the emitted light from the central light emitting unit 31 and the color of the emitted light from the both side light emitting units 32. Therefore, it is possible to easily prevent the user from misidentifying the air contamination status.

  Moreover, the both side light emission part 32 light-emits the monochromatic LED of the position close | similar to the center light emission part 31 in order with the increase in a 2nd rank. Thereby, a user's misidentification about the dirt state of air can be prevented more easily.

  In addition, the both side light emission part 32 may light-emit the monochromatic LED of the position close | similar to the center light emission part 31 in order according to the reduction | decrease of a 2nd rank. Even in this case, it is possible to more easily prevent the user from misidentifying the air contamination.

Moreover, the display part 40 (1st display part) which shows that the density | concentration of PM2.5 in air exceeds the predetermined value is provided. Thereby, the user can easily recognize that PM2.5 having a concentration affecting health is contained in the air in the room.

Further, when the illuminance in the living room is lower than the predetermined lower limit I ₀ , the air blowing direction in the humidified state is set forward and the air blowing direction in the non-humidified state is set upward. Accordingly, humidified air (humidified air) can be directly applied to a user who is sleeping on a bed or the like at night, and non-humidified air is blown out while avoiding the user. Therefore, drying of the user's skin can be reliably prevented.

In addition, when the user goes to bed in a bed or the like, non-humidified air may be sent downward from the air outlet 4. That is, when the illuminance in the living room is lower than the predetermined lower limit I ₀ , the non-humidified air blowing direction may be set to a direction other than the front direction. Thereby, the air in a non-humidified state is blown out avoiding the user who is sleeping in a bed etc., and drying of a user's skin can be prevented reliably.

In addition, when the ion generator 11 is driven when the illuminance in the living room is lower than the lower limit I ₀ and is in a non-humidified state, the air blowing direction is set to the front. Thereby, the air current containing ions directly hits a user sleeping in a bed or the like at night. Therefore, the user's skin can be sufficiently moisturized, and the user's skin can be reliably prevented from drying.

Further, when the illuminance in the living room is higher than the lower limit I ₀ , the wind direction plates 14 and 15 open the outlets 4 and 5, respectively, so that the humidified air is spread to every corner of the living room in the humidified state. be able to.

Further, when air is sent out from the front outlet 4, if the illuminance in the room is lower than the lower limit value I ₀ , the air is sent in a substantially horizontal direction, and if the illuminance in the room is higher than the lower limit value I _0, Send out upward. Thereby, drying of a user's skin can be prevented more reliably.

Further, when the illuminance in the living room is lower than the lower limit I ₀ and air is sent out from the front outlet 4, the damper 12 guides the airflow to the first branch passage 8a. Thereby, humidified air and the air containing the ion which generate | occur | produced with the ion generator 11 can be easily guide | induced to the blower outlet 4. FIG.

  Further, a guide member that guides water from the water supply tank 21 between the bottom surface (regulator) of the tray 22 that abuts the lowered float 24 a and regulates the lower limit position of the float 24 a and the float 24 a and the bottom surface of the tray 22. 26. As a result, even when the float 24a adheres to the bottom surface of the tray 22 due to the scale of the remaining water in the tray 22, due to the collision with the float 24a of the water that has flowed in vigorously from the water supply tank 21, Adhesion can be easily released. Therefore, the float 24a can be surely lifted, and erroneous detection of the water level sensor 24 can be prevented.

Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 13 shows a side sectional view of the air cleaner of the present embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In the present embodiment, the air outlet plate 4, the wind direction plate 14, the first branch passage 8a and the damper 12 are omitted, and the arrangement of the wind direction plate 15 is different from that of the first embodiment. In the present embodiment, the configuration of the display unit 30 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

The wind direction plate 15 has a curved cross-sectional shape and is supported by a rotation shaft portion 15 a provided at the rear portion of the wind direction plate 15 so as to be rotatable in the vertical direction. In step # 6 of FIG. 9, air is sent forward from the blower outlet 5 by the wind direction plate 15 indicated by a solid line. Thus, humidified air or air containing ions generated by the ion generator 11 can be directly applied to a user sleeping in a bed or the like at night. Therefore, drying of the user's skin can be reliably prevented.

  In step # 5 and step # 7 in FIG. 9, the wind direction plate 15 is rotated to the position indicated by the alternate long and short dash line 15 ′, and air is sent upward from the blowout port 5. Thereby, the air of a non-humidified state is blown off avoiding a user. Therefore, drying of the user's skin can be reliably prevented.

  FIG. 14 shows an image diagram of the lighting pattern of the central light emitting unit 31 and the both side light emitting units 32 and 33 of the display unit 30 of the air cleaner 1 of the present embodiment. The solid oval indicates the lighting state of the central light emitting unit 31 and the both side light emitting units 32 and 33, and the broken oval indicates the unlit state of the central light emitting unit 31 and the both side light emitting units 32 and 33. The display unit 30 has both side light emitting units 33 on the opposite side of the central light emitting unit 31 with respect to the both side light emitting units 32. The both-side light emitting unit 33 includes single-color LEDs 33R, 33T, and 33G that emit red light, orange light, and green light, respectively. The single color LEDs 33R, 33T, and 33G are arranged in the same manner as the single color LEDs 32R, 32T, and 32G. The distance D3 between the single color LED 32G and the single color LED 33R is set to be equal to or greater than the distance D2.

  As the degree of contamination (second rank) increases, the central light emitting unit 31 and the two side light emitting units 32 are lit in the same manner as in the first embodiment. In the both-side light emitting unit 33, when the degree of contamination is “0” or “1”, only the single color LED 33G is lit, and when the degree of contamination is “2” or “3”, only the single color LED 33T is lit. When "4", only the single color LED 33R is lit. Thereby, the both-side light emission part 33 makes single color LED of the position close | similar to the center light emission part 31 light-emit according to the increase in a 2nd rank. At this time, since the distance D3 is set to be equal to or greater than the distance D2, it is possible to prevent color mixture of the emitted light from the both side light emitting units 32 and 33.

  In this embodiment, the same effect as that of the first embodiment can be obtained. Moreover, since the wind direction plate 14 and the damper 12 are omitted, the number of parts can be reduced as compared with the air cleaner 1 of the first embodiment, and the manufacturing cost of the air cleaner 1 can be reduced.

  In addition, the display unit 30 has a double-sided light emitting unit 33 on the opposite side of the central light emitting unit 31 with respect to the double-sided light emitting unit 32, and the lighting state of the central light emitting unit 31 and the double-sided light emitting units 32 and 33 can be changed according to the degree of contamination To do. As a result, it is possible to further prevent the user from misidentifying the air contamination status.

  In addition, the both side light emission part 33 may make single color LED of the position close | similar to the center light emission part 31 light-emit according to the reduction | decrease of a 2nd rank.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 15 is a side sectional view of the vicinity of the float of the humidifying part of the air cleaner according to the present embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. This embodiment is different from the first embodiment in that ribs 27 (regulators) are provided on the bottom surface of the tray 22 and speakers (not shown) are provided on the side surfaces of the housing 2. Other parts are the same as those in the first embodiment.

  Ribs 27 are formed on the bottom surface of the tray 22 so as to protrude upward. The rib 27 abuts on the lowered float 24a indicated by the alternate long and short dash line 24a 'and regulates the lower limit position of the float 24a. At this time, the float 24 a makes line contact with the rib 27. The guide member 26 guides water from the water supply tank 21 between the float 24 a and the rib 27.

When the concentration of PM2.5 in the air exceeds a predetermined value, in addition to the display of the characters 40a on the display unit 40, a sound such as “PM2.5 concentration is high” is output from the speaker. To do. Accordingly, the user can more easily recognize that PM2.5 having a concentration that affects health is contained in the air in the room. Note that when the concentration of PM2.5 in the air exceeds a predetermined value, a buzzer sound may be output from the speaker instead of the above sound.

  In this embodiment, the same effect as that of the first embodiment can be obtained. In addition, since ribs 27 (regulators) that abut the lowered float 24a and regulate the lower limit position of the float 24a are provided, adhesion between the float 24a and the bottom surface of the tray 22 due to the remaining water scale in the tray 22 is provided. It can be easily reduced.

  Even if the float 24 a and the rib 27 adhere to each other due to the scale of the remaining water in the tray 22, since the float 24 a is in line contact with the rib 27, the water from the water supply tank 21 guided by the guide member 26. Therefore, the adhesion between the float 24a and the rib 27 can be easily released.

  In addition, when the concentration of PM2.5 in the air exceeds a predetermined value, the user is notified by the speaker provided in the housing 2, so that the user has a concentration of PM2.5 that affects health in the air in the room. It can be recognized more easily.

  The present invention can be used for an air cleaner provided with a dust sensor.

DESCRIPTION OF SYMBOLS 1 Air cleaner 2 Housing | casing 3 Suction inlet 4, 5 Air outlet 6 Operation part 8 Air supply path 8a 1st branch path 8b 2nd branch path 9 Filter unit 10 Blower 11 Ion generator 12 Damper 13 Illuminance sensor 14, 15 Wind direction board DESCRIPTION OF SYMBOLS 20 Humidification part 21 Water supply tank 21a Tank cap 21b Grasp part 22 Tray 22a Filter accommodation part 22b Tank accommodation part 23 Humidification filter 24 Water level sensor 24a Float 26 Guide member 27 Rib (regulation part)
30 display unit (second display unit)
31 Central light emitting part 32, 33 Both side light emitting part 32R, 32T, 32G, 33R, 33T, 33G Single color LED
35 Lamp cover 40 Display section (first display section)
50 display section

Claims (3)

A dust sensor capable of extracting the concentration of PM2.5 in the air;
In an air cleaner provided with a display unit arranged on the front upper part of the housing and performing display regarding the concentration of PM2.5 in the air,
The display unit is formed of a two-color LED having a red LED element and a green LED element, and displays in orange when the concentration of PM2.5 in the air exceeds a first predetermined value. When the concentration of PM2.5 exceeds a second predetermined value that is higher than the first predetermined value, a red display is performed. An air passage connecting the air inlet for sucking air and the air outlet for blowing air;
A blower disposed in the air passage;
A filter provided in the air passage to collect dust in the air;
The blower can be changed to a plurality of blowing levels having different rotation speeds based on a plurality of dirt levels ranked according to the dust concentration, and the rotation speed is lower than when the dirt level is high. Set the air flow level at a high
2. The air cleaner according to claim 1, wherein the rotational speed of the blower is increased by further raising the blower level than when the concentration of PM2.5 is high with respect to the predetermined degree of contamination. The air cleaner according to claim 1, further comprising a speaker, wherein when the concentration of PM2.5 in the air exceeds a predetermined value, a sound or a buzzer sound is output from the speaker.

Images