Air purifier

Abstract

This air purifier comprises: a first flow path (21) in which a purification unit (40) is disposed and to which air within a target space (S) flows, the first flow path (21) being used for sending air to the target space (S); a second flow path (22) in which a diffusion unit (50) is disposed and to which air within the target space (S) flows, the second flow path (22) being used for sending air to the target space (S); and adjustment units (30A, 30B, 60) that at least adjust the air flow rate in the first flow path (21).

Description

air purifier

[0001] The present disclosure relates to an air purifier.

[0002] Patent Document 1 discloses a device that diffuses an inhibitor that inhibits insect activity into an indoor space as a target space. In this device, the inhibitor is diffused from a diffusing unit toward the target space, thereby inhibiting the activity of insects present in the target space.

[0003] JP 2024-11598 A

[0004] The inventors of the present application have devised the idea of ​​providing an air purifier that purifies a target space with a diffusing unit that diffuses components such as inhibitors, as disclosed in Patent Document 1. In a configuration in which a diffusing unit is provided in an air purifier, the components diffused into the target space may be removed by the purifying unit that is sucked into the air purifier, potentially impairing the function of the components.

[0005] The present disclosure provides an air purifier that can prevent components diffused into a target space from being removed by a purifying section.

[0006] The first aspect relates to an air purifier. The air purifier includes a purification section (40) that purifies air in a target space (S), a diffusion section (50) that diffuses components to be supplied to the target space (S), a first flow path (21) in which the purification section (40) is arranged and through which air from the target space (S) flows and for sending the air to the target space (S), a second flow path (22) in which the diffusion section (50) is arranged and through which air from the target space (S) flows and for sending the air to the target space (S), and an adjustment section (30A, 30B, 60) that adjusts at least the air flow rate of the first flow path (21).

[0007] In the first aspect, the flow rate of air in the first flow path (21) can be reduced by the flow adjuster (30A, 30B, 60). As a result, the components diffused from the second flow path (22) to the target space (S) can be prevented from passing through the purifying section (40) of the first flow path (21). Therefore, the components released into the target space (S) can be prevented from being removed by the purifying section (40).

[0008] The second aspect is the first aspect, further comprising a controller (100) that controls the adjusting section (30A, 30B, 60) to perform a first operation in which the air flow rate in the first flow path (21) is smaller than the air flow rate in the second flow path (22).

[0009] In the second mode, in the first operation, the air flow rate in the first flow path (21) is smaller than the air flow rate in the second flow path (22). This increases the amount of components diffused from the diffusion section (50) to the target space (S), allowing for operation that prioritizes the diffusion of components. In this case, the air flow rate in the first flow path (21) is reduced, thereby preventing the components diffused to the target space (S) from being removed by the purification section (40).

[0010] In a third aspect, in the second aspect, the adjusters (30A, 30B, 60) are configured to adjust the air flow rates in the first flow path (21) and the second flow path (22). The controller (100) controls the adjusters (30A, 30B, 60) to perform a second operation in which the air flow rate in the first flow path (21) is greater than the air flow rate in the second flow path (22).

[0011] In the third aspect, in the second operation, the air flow rate in the first flow path (21) is greater than that in the second flow path (22). This increases the flow rate of air purified by the purification section (40), enabling operation that prioritizes the purification of air in the target space (S). Since the air flow rate in the second flow path (22) is reduced, the amount of components diffused from the diffusion section (50) is also reduced. This reduces the removal of components diffused into the target space (S) by the purification section (40). In other words, the reduction in the amount of components diffused from the diffusion section (50) reduces the wasteful consumption of these components.

[0012] In a fourth aspect, in any one of the first to third aspects, the flow control unit (30A, 30B, 60) is an opening / closing mechanism (60) that switches between a first state in which the first flow path (21) is in an open state and the second flow path (22) is in a closed state, and a second state in which the first flow path (21) is in a closed state and the second flow path (22) is in an open state.

[0013] In the fourth aspect, by setting the opening / closing mechanism (60) to the first state, the first flow path (21) is opened and the second flow path (22) is closed. Therefore, air in the target space (S) flows through the purification section (40) but does not flow through the diffusion section (50). This allows operation that prioritizes air purification. Since components are not diffused from the diffusion section (50), removal of the components by the purification section (40) can be suppressed.

[0014] By placing the opening / closing mechanism (60) in the second state, the first flow path (21) is closed and the second flow path (22) is opened. Therefore, the air in the target space (S) flows through the dissipation section (50) but does not flow through the purification section (40). This allows operation that prioritizes the dissipation of components. Since the air in the target space (S) does not flow through the purification section (40), removal of components in the air by the purification section (40) can be suppressed.

[0015] In a fifth aspect, in any one of the first to third aspects, the flow control section (30A, 30B, 60) includes a variable air volume first fan (30A) arranged in the first flow path (21) and a variable air volume second fan (30B) arranged in the second flow path (22).

[0016] In the fifth aspect, the air volume of the first fan (30A) is set to be larger than the air volume of the second fan (30B), thereby enabling operation that prioritizes air purification. Since the flow rate of air flowing through the diffusion section (50) is reduced, the amount of components diffused from the diffusion section (50) is also reduced. Therefore, removal of components by the purification section (40) can be suppressed.

[0017] By setting the air volume of the first fan (30A) smaller than the air volume of the second fan (30B), operation can be performed with priority given to the diffusion of components. Since the flow rate of air flowing through the purification section (40) is reduced, removal of the components diffused into the target space (S) by the purification section (40) can be suppressed.

[0018] In a sixth aspect, in any one of the first to fifth aspects, the emitting section (50) emits an inhibitor that inhibits insect activity.

[0019] In the sixth aspect, the diffused inhibitor can be prevented from being removed into the clean section (40).

[0020] A seventh aspect is any of the first to sixth aspects, wherein the purifying section (40) includes a filter section (41) or an adsorption section (43).

[0021] In the seventh aspect, it is possible to prevent the emitted components from being trapped in the filter part (41) or the adsorption part (43) serving as the purification part.

[0022] An eighth aspect is any one of the first to seventh aspects, wherein the purifying section (40) is configured to adsorb or decompose VOCs.

[0023] In the eighth aspect, it is possible to prevent components, particularly components containing VOCs (volatile organic compounds), that have been diffused into the target space (S) from being removed by the purification part (40).

[0024] In a ninth aspect, in the eighth aspect, the air conditioner further includes a collector (71, 72, 73) that collects dust in the air in the target space (S).

[0025] In the ninth aspect, the dust in the air can be collected by the collection sections (71, 72, 73).

[0026] In a tenth aspect, the air purifier of the ninth aspect further includes an upstream flow path (24) connecting an inlet end of the first flow path (21) and an inlet end of the second flow path (22) and through which air from the target space (S) flows. The collectors (71, 72, 73) are disposed in the upstream flow path (24).

[0027] In the tenth aspect, even if the flow rate of air in the first flow path (21) is adjusted by the flow adjuster (30A, 30B, 60), the air flows through the collector (71, 72, 73). However, the collector (71, 72, 73) is designed to collect dust and is unlikely to collect components emitted from the diffuser (50). Therefore, the components emitted from the diffuser (50) can be prevented from being collected in the collector (71, 72, 73).

[0028] In an eleventh aspect, in any one of the first to tenth aspects, the diffusing section (50) is configured to diffuse an aroma substance or a substance that acts on the autonomic nervous system, and the purifying section (40) is configured to adsorb or decompose the aroma substance or the substance that acts on the autonomic nervous system.

[0029] In the eleventh aspect, the aromatic substance or the substance acting on the autonomic nerves, which has been diffused into the target space (S), can be prevented from being removed by the purifying part (40).

[0030] FIG. 1 is a diagram illustrating the overall configuration of an air purifier according to embodiment 1. FIG. 2 is a schematic diagram illustrating the configuration of the air purifier according to embodiment 1. FIG. 3 is a block diagram of a controller and most peripheral devices according to embodiment 1. FIG. 4 is a flowchart illustrating the operating behavior of the air purifier according to embodiment 1. FIG. 5 is a schematic diagram illustrating the configuration of an air purifier according to a modified example of embodiment 1. FIG. 6 is a schematic diagram illustrating the configuration of an air purifier according to embodiment 2. FIG. 7 is a block diagram of a controller and most peripheral devices according to embodiment 2. FIG. 8 is a flowchart illustrating the operating behavior of the air purifier according to embodiment 2. FIG. 9 is a schematic diagram illustrating the configuration of an air purifier during a cleaning operation according to embodiment 3. FIG. 10 is a schematic diagram illustrating the configuration of an air purifier during a dissipation operation according to embodiment 3.

[0031] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical concept of the present disclosure. Since the drawings are intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding.

[0032] (1) Embodiment 1 (1-1) Basic Configuration The air purifier (10) has a function of purifying the air in the target space (S) and a function of releasing a predetermined component into the target space (S). The component in this embodiment is an inhibitor that inhibits the activity of insects (I). The air purifier (10) repels insects (I) that have appeared in the target space (S) or creates an environment in the target space (S) that is inhospitable to insects (I). This makes it possible to create an environment in the target space (S) where the number of insects (I) is reduced. Here, "inhibiting the activity of insects (I)" includes, for example, reducing the sensitivity of the olfactory or tactile functions of the insects (I) or inhibiting the reproduction of the insects (I).

[0033] As shown in Figure 1, the target space (S) is an indoor space where people stay, such as a bedroom, living room, kitchen, or office in a house. Target insect species that are the targets of the air purifier (10) include cockroaches, mites, etc. These target insect species (I) are pests that occur relatively frequently in the target space (S) where people live.

[0034] (2) Detailed Configuration As shown in Fig. 1, the air purifier (10) is placed in the target space (S). The air purifier (10) is a floor-standing type that is installed on the floor, but it may also be a wall-mounted or ceiling-mounted type.

[0035] As shown in FIG. 2, the air purifier (10) includes a casing (11), a fan (30), a purifying section (40), a diffusing section (50), and an opening / closing mechanism (60).

[0036] (2-1) Casing The casing (11) is formed in the shape of a hollow box. The casing (11) has an air flow path (20) through which air flows. The casing (11) has one first suction inlet (12A), one second suction inlet (12B), and one air outlet (13). The air flow path (20) has a first flow path (21), a second flow path (22), and a main flow path (23).

[0037] The first flow path (21) and the second flow path (22) are parallel to each other. A first suction port (12A) is formed at the inflow end of the first flow path (21). The outflow end of the first flow path (21) is connected to the main flow path (23). A second suction port (12B) is formed at the inflow end of the second flow path (22). The outflow end of the second flow path (22) is connected to the main flow path (23). The main flow path (23) constitutes a downstream flow path located downstream of the first flow path (21) and the second flow path (22). An outlet (13) is formed at the downstream end of the main flow path (23). The air purifier (10) may have a flap that adjusts the angle of air blown out from the outlet (13).

[0038] (2-2) Fan The fan (30) is disposed in the main flow path (23). The fan (30) is a variable air volume fan with a variable motor speed. The fan (30) is a centrifugal turbofan, but may also be a propeller fan or a crossflow fan.

[0039] (2-3) Purification Section The purification section (40) is disposed in the first flow path (21). The purification section (40) is an element that purifies the air in the air flow path (20). In this example, the purification section (40) includes, for example, a dust collection filter (41), a discharge unit (42), and a deodorization filter (43). In the air flow path (20), the dust collection filter (41), the discharge unit (42), and the deodorization filter (43) are disposed in this order from the upstream side to the downstream side of the air flow, but the arrangement order of these elements is merely an example. The dust collection filter (41) is an example of a filter section that captures dust in the air. The dust collection filter (41) is, for example, a HEPA filter. The discharge unit (42) generates, for example, active species for decomposing odorous components through discharge. The discharge unit (42) generates, for example, streamer discharge, but may also generate other discharges, such as corona discharge or creeping discharge. The deodorizing filter (43) removes odorous components from the air. The deodorizing filter (43) has a substrate and activated carbon supported on the substrate. The deodorizing filter (43) is an example of a filter unit or an adsorption unit. The elements of the purifying unit (40) are merely examples. The purifying unit (40) may include, for example, an electrostatic precipitator unit or an ultraviolet ray generating unit.

[0040] (2-4) Dispersion Unit The dispersal unit (50) is disposed in the second flow path (22). The dispersal unit (50) disperses the inhibitor supplied to the target space (S). The dispersal unit (50) disperses the inhibitor into the air by air flowing around it. The dispersal unit (50) has an inhibitor source composed of a solid or liquid containing the inhibitor. The inhibitor reduces the sensitivity of the olfactory or tactile functions of the insects (I) or inhibits their reproduction. The dispersal unit (50) may be a unit that actively disperses the inhibitor. In this case, the unit may include, for example, a power supply unit for electrostatic spraying, an ultrasonic element for ultrasonic spraying, a compressed fluid that transports the inhibitor by pressure, a shutter that opens to promote volatilization of the solid inhibitor, and a fan that transports the gaseous inhibitor.

[0041] (2-5) Opening / Closing Mechanism The opening / closing mechanism (60) is an example of an adjusting unit that adjusts the flow rate of air in the first flow path (21) and the second flow path (22). The opening / closing mechanism (60) has a first damper (61) and a second damper (62). The first damper (61) is arranged in the first flow path (21), and the second damper (62) is arranged in the second flow path (22). The first damper (61) is arranged upstream of the purifier section (40) in the first flow path (21), but may be arranged downstream of the purifier section (40). The second damper (62) is arranged upstream of the diffuser section (50) in the second flow path (22), but may be arranged downstream of the diffuser section (50).

[0042] The first damper (61) is switchable between an open state for opening the first flow path (21) and a closed state for closing the first flow path (21). The second damper (62) is switchable between an open state for opening the second flow path (22) and a closed state for closing the second flow path (22).

[0043] (3) Controller As shown in Fig. 3, the air purifier (10) includes a controller (100). The controller (100) includes a microcomputer and a memory device. The memory device stores software for operating the microcomputer.

[0044] The controller (100) controls the ON / OFF switching of the fan (30) and the rotation speed of the fan (30), in other words, the volume of air drawn into or blown out of the air purifier (10). The controller (100) controls the opening / closing mechanism (60). Specifically, the controller (100) switches the opening / closing mechanism (60) between a first state shown in FIG. 2(A) and a second state shown in FIG. 2(B). In the first state of the opening / closing mechanism (60), the first flow path (21) is open and the second flow path (22) is closed. In the second state of the opening / closing mechanism (60), the first flow path (21) is closed and the second flow path (22) is open.

[0045] The controller (100) is connected to a router (110) via a wireless or wired communication line (W). The router (110) is connected to a server device (120) on the cloud via a network (N). A user can operate the air purifier (10) by operating a communication terminal (130). The operation of the air purifier (10) includes starting and stopping the operation of the air purifier (10), switching the operation mode of the air purifier (10), setting the output of the purification section (40) (e.g., the discharge unit (42)), and setting the target air volume of the fan (30).

[0046] The air purifier (10) has an operation unit (140) for operating the air purifier (10) in addition to the communication terminal (130). A user can operate the operation unit (140) to operate the air purifier (10) in the same way as the communication terminal (130).

[0047] (4) Operational Operation of the air purifier (10) will be described. The air purifier (10) performs a cleaning operation and a diffusion operation. The diffusion operation is an example of a first operation, and the cleaning operation is an example of a second operation. The cleaning operation is an operation for cleaning the target space (S), and the diffusion operation is an operation for supplying an inhibitor as a functional component to the target space (S).

[0048] (4-1) Cleaning Operation When a user operates the communication terminal (130) or the operation unit (140) to select the cleaning operation, a signal to start the cleaning operation is received by the controller (100). As a result, after YES in step ST11 of Fig. 4, the controller (100) starts the cleaning operation in step ST12. Specifically, in step ST13, the controller (100) sets the opening / closing mechanism (60) to the first state, and in step ST14, the controller (100) operates the fan (30).

[0049] As shown in FIG. 2(A), during the cleaning operation, air from the target space (S) flows into the first flow path (21) through the first inlet (12A). The air from the target space (S) does not flow through the second flow path (22). The air in the first flow path (21) passes through the purifying section (40). The air passes through the dust collection filter (41), the discharge unit (42), and the deodorizing filter (43), in that order. As a result, dust and odor components in the air are removed. The air cleaned in the first flow path (21) flows through the main flow path (23) and is then blown out into the target space (S) through the outlet (13).

[0050] In the cleaning operation, the air flow rate in the first flow path (21) becomes larger than the air flow rate in the second flow path (22). Specifically, the air flow rate in the first flow path (21) becomes a predetermined amount greater than zero (for example, a maximum flow rate or a set flow rate), and the air flow rate in the second flow path (22) becomes zero.

[0051] In this way, in the cleaning operation, the inhibitors are not supplied to the target space (S), and therefore the inhibitors are not removed by the cleaning section (40). Furthermore, the cleaning capacity of the cleaning section (40) is used for the objects that should be treated in the target space (S) (for example, dust containing allergens, odorous components, harmful components, etc.). Therefore, the target space (S) can be efficiently cleaned while suppressing the wasteful consumption of the inhibitors.

[0052] When the user operates the communication terminal (130) or the operation unit (140) to select the end of the cleaning operation, a cleaning operation end signal is received by the controller (100). As a result, after YES in step ST15, the controller (100) ends the cleaning operation in step ST16.

[0053] (4-2) Dissipation Operation When the user operates the communication terminal (130) or the operation unit (140) to select the dissipation operation, a signal to start the dissipation operation is received by the controller (100). As a result, after YES in step ST17 of Fig. 4, the controller (100) starts the dissipation operation in step ST18. Specifically, in step ST19, the controller (100) sets the opening / closing mechanism (60) to the second state, and in step ST20, the controller (100) operates the fan (30).

[0054] As shown in FIG. 2(B), during the diffusion operation, air from the target space (S) flows into the second flow path (22) through the second inlet (12B). The air from the target space (S) does not flow through the first flow path (21). The air in the second flow path (22) passes through the diffusion section (50). From the diffusion section (50), inhibitors are passively or actively diffused into the air. The air containing the inhibitors flows through the main flow path (23) and is then blown out through the outlet (13) into the target space (S). As a result, the inhibitors are diffused into the target space (S).

[0055] In the dissipation operation, the air flow rate in the first flow path (21) becomes smaller than the air flow rate in the second flow path (22). Specifically, the air flow rate in the first flow path (21) becomes zero, and the air flow rate in the second flow path (22) becomes a predetermined amount (e.g., a maximum flow rate or a set flow rate) greater than zero.

[0056] In this manner, in the dissipation operation, the air in the target space (S) does not flow through the first flow path (21), and therefore, the inhibitors can be prevented from being removed by the purifying section (40). Therefore, the dissipation effect of the inhibitors by the dissipation section (50) can be sufficiently obtained, and insect activity can be inhibited.

[0057] When the user operates the communication terminal (130) or the operation unit (140) to select the end of the dissipation operation, a dissipation operation end signal is received by the controller (100). As a result, after YES in step ST21, the controller (100) ends the dissipation operation in step ST22.

[0058] (5) Advantages of First Embodiment The air purifier (10) has a first flow path (21) and a second flow path (22). The first flow path (21) has a purification section (40) disposed therein, through which air from the target space (S) flows and delivers the air to the target space (S). The second flow path (22) has a diffusion section (50) disposed therein, through which air from the target space (S) flows and delivers the air to the target space (S). The air purifier (10) includes an opening / closing mechanism (60) as an adjustment section that adjusts at least the air flow rate through the first flow path (21) and the second flow path (22).

[0059] In this configuration, the air flow rate in the first flow path (21) can be made smaller than the air flow rate in the second flow path (22) during the diffusion operation, thereby preventing the inhibitors in the target space (S) from being removed by the purification section (40). As a result, the diffusion effect of the inhibitors can be sufficiently obtained during the diffusion operation, and insect activity can be effectively inhibited. In addition, the inhibitors can be prevented from being trapped in the dust collection filter (41) and the deodorization filter (43), which are the purification section (40), thereby preventing the lifespan of the dust collection filter (41) and the deodorization filter (43) from being shortened.

[0060] In particular, during the dissipation operation, the opening / closing mechanism (60) closes the first flow path (21) and opens the second flow path (22), thereby preventing the inhibitor from being removed into the purification section (40).

[0061] In the dissipation operation, the controller (100) controls the opening / closing mechanism (60) so that the air flow rate in the first flow path (21) is smaller than the air flow rate in the second flow path (22). This configuration makes it possible to achieve the above-mentioned effects.

[0062] The controller (100) controls the opening / closing mechanism (60) during the cleaning operation so that the air flow rate through the first flow path (21) is greater than the air flow rate through the second flow path (22). This configuration ensures that the air flow rate through the first flow path (21) is greater than the air flow rate through the second flow path (22) during the cleaning operation, thereby enabling operation that prioritizes the purification of the air in the target space (S). Since less inhibitors are supplied from the diffusion section (50) to the target space (S), the wasteful removal of the diffused inhibitors by the purification section (40) can be suppressed. This extends the life of the inhibitors. Additionally, the purification capacity of the purification section (40) is not utilized for the removal of inhibitors, allowing the purification capacity of the purification section (40) to be fully utilized.

[0063] In particular, during the cleaning operation, the second flow path (22) is closed and the first flow path (21) is opened by the opening / closing mechanism (60), thereby preventing the inhibitor from being wasted and allowing the cleaning capacity of the cleaning section (40) to be fully exerted.

[0064] The opening / closing mechanism (60) may be a damper, a shutter, a ball valve, a flow rate control valve, or the like. The regulator may not open or close the first flow path (21) and the second flow path (22), but may be configured to regulate the air flow rate of the first flow path (21) and the air flow rate of the second flow path (22) in multiple stages. In this case, the regulator may be configured with a damper, a shutter, a ball valve, a flow rate control valve, or the like. In the dissipation operation, the controller (100) controls the regulator so that the air flow rate of the first flow path (21) is smaller than the air flow rate of the second flow path (22). At this time, the air flow rate of the first flow path (21) may be a predetermined amount greater than zero. In the cleaning operation, the controller (100) controls the regulator so that the air flow rate of the first flow path (21) is larger than the air flow rate of the second flow path (22). At this time, the air flow rate of the second flow path (22) may be a predetermined amount greater than zero.

[0065] (6) Modification of First Embodiment A modification of the first embodiment will be described. The following description will focus on differences from the first embodiment. In the first modification of the first embodiment, a main flow path (23) is arranged upstream of the first flow path (21) and the second flow path (22). The main flow path (23) constitutes an upstream flow path located upstream of the first flow path (21) and the second flow path (22). In other words, in the first embodiment, the fan (30) is arranged on the outlet side of the air flow path (20), whereas in the modification of the first embodiment, the fan (30) is arranged on the suction side of the air flow path (20).

[0066] Specifically, a first suction port (12A) and a second suction port (12B) are formed at the inlet end of the main flow path (23). An outlet end of the main flow path (23) is connected to an inlet end of the first flow path (21) and an inlet end of the second flow path (22). An outlet end of the first flow path (21) and an outlet end of the second flow path (22) are connected to the outlet (13). In the example of Fig. 5, the outlet (13) communicates with both the first flow path (21) and the second flow path (22), but independent outlets may be provided for the first flow path (21) and the second flow path (22).

[0067] The first damper (61) is arranged in the first flow path (21) upstream of the purification section (40), and the second damper (62) is arranged in the second flow path (22) upstream of the diffusion section (50). However, the first damper (61) may be arranged in the first flow path (21) downstream of the purification section (40), and the second damper (62) may be arranged in the second flow path (22) downstream of the diffusion section (50).

[0068] The control of the cleaning operation and the diffusion operation in the modification of the first embodiment is the same as that in the first embodiment shown in Fig. 4. Therefore, the same effects as those in the first embodiment can be obtained in this modification.

[0069] (7) Second Embodiment (7-1) Basic Configuration The air purifier (10) of the second embodiment differs from the first embodiment in the configuration of the adjustment unit. As shown in FIG. 6 , a first fan (30A) is disposed in the first flow path (21), and a second fan (30B) is disposed in the second flow path (22). Specifically, the casing (11) is formed with a first suction inlet (12A), a second suction inlet (12B), a first outlet (13A), and a second outlet (13B). The first flow path (21) is formed from the first suction inlet (12A) to the first outlet (13A). The second flow path (22) is formed from the second suction inlet (12B) to the second outlet (13B).

[0070] The first flow path (21) and the second flow path (22) may be parallel to each other. Therefore, the first flow path (21) and the second flow path (22) may share a single inlet port, or the first flow path (21) and the second flow path (22) may share a single outlet port. The first flow path (21) and the second flow path (22) may have different cross-sectional areas or lengths. For example, the cross-sectional area of ​​the first flow path (21) may be larger than the cross-sectional area of ​​the second flow path (22).

[0071] The first fan (30A) is disposed downstream of the purifier (40) in the first flow path (21), and the second fan (30B) is disposed downstream of the diffuser (50) in the second flow path (22). As in the modification of the first embodiment, the first fan (30A) may be disposed upstream of the purifier (40) in the first flow path (21), and the second fan (30B) may be disposed downstream of the diffuser (50) in the second flow path (22). The first fan (30A) and the second fan (30B) are variable-capacity fans whose motors have variable rotation speeds. The first fan (30A) and the second fan (30B) may have different sizes and rated airflows. For example, the size and rated airflow of the first fan (30A) may be larger than those of the second fan (30B).

[0072] As shown in FIG. 7, the controller (100) of the second embodiment is connected to the first fan (30A) and the second fan (30B) and controls the rotation speeds of the first and second fans individually.

[0073] (7-2) Operation Operation of the air purifier (10) of the second embodiment will be described.

[0074] (7-2-1) Cleaning Operation When the controller (100) receives a cleaning operation start signal (YES in step ST21 of FIG. 8 ), the controller (100) starts the cleaning operation in step ST22. Specifically, the controller (100) operates the first fan (30A) in step ST23, and stops the second fan (30B) in step ST24. If the first fan (30A) is already operating, the controller (100) maintains the operation of the first fan (30A) in step ST23. If the second fan (30B) is already stopped, the controller (100) maintains the stop of the second fan (30B) in step ST24.

[0075] As shown in FIG. 6(A), during the cleaning operation, air from the target space (S) flows into the first flow path (21) through the first inlet (12A). The air from the target space (S) does not flow through the second flow path (22). The air in the first flow path (21) passes through the purifying section (40). The air passes through the dust collecting filter (41), the discharge unit (42), and the deodorizing filter (43), in that order. As a result, dust and odorous components in the air are removed. The air cleaned in the first flow path (21) is blown out into the target space (S) through the first outlet (13A).

[0076] In the cleaning operation, the air flow rate in the first flow path (21) is greater than the air flow rate in the second flow path (22). Specifically, the air flow rate in the first flow path (21) becomes a predetermined amount greater than zero (e.g., a maximum flow rate or a set flow rate), and the air flow rate in the second flow path (22) becomes zero. Therefore, in the cleaning operation of the second embodiment, the same effects as those of the cleaning operation of the first embodiment can be achieved.

[0077] When the controller (100) receives the cleaning operation end signal (YES in step ST25), the controller (100) ends the cleaning operation in step ST26.

[0078] (7-2-2) Dissipation Operation When the controller (100) receives a signal to start the dissipation operation (YES in step ST27 of FIG. 8), the controller (100) starts the dissipation operation in step ST28. Specifically, the controller (100) operates the second fan (30B) in step ST29, and stops the first fan (30A) in step ST30. If the second fan (30B) is already operating, the controller (100) maintains the operation of the second fan (30B) in step ST29. If the first fan (30A) is already stopped, the controller (100) maintains the stop of the first fan (30A) in step ST30.

[0079] As shown in FIG. 6(B) , during the diffusion operation, air from the target space (S) flows into the second flow path (22) through the second inlet (12B). The air from the target space (S) does not flow through the first flow path (21). The air in the second flow path (22) passes through the diffusion section (50). From the diffusion section (50), the inhibitors are passively or actively diffused into the air. The air containing the inhibitors is blown out through the second outlet (13B) into the target space (S). As a result, the inhibitors are diffused into the target space (S).

[0080] In the dissipation operation, the air flow rate in the first flow path (21) becomes smaller than the air flow rate in the second flow path (22). Specifically, the air flow rate in the first flow path (21) becomes zero, and the air flow rate in the second flow path (22) becomes a predetermined amount (e.g., a maximum flow rate or a set air volume) greater than zero. Therefore, in the dissipation operation of the second embodiment, the same effects as those of the dissipation operation of the first embodiment can be obtained.

[0081] When the controller (100) receives the signal indicating the end of the dissipation operation (YES in step ST31), the controller (100) ends the dissipation operation in step ST32.

[0082] The controller (100) may operate the first fan (30A) and the second fan (30B) in the cleaning operation and the dissipation operation. In this case, the controller (100) operates the first fan (30A) and the second fan (30B) in the cleaning operation so that the air volume of the first fan (30A) is larger than the air volume of the second fan (30B). The controller (100) operates the first fan (30A) and the second fan (30B) in the dissipation operation so that the air volume of the second fan (30B) is larger than the air volume of the first fan (30A).

[0083] (8) Embodiment 3 As shown in FIG. 9 , an air purifier (10) is placed in a target space (S). The air purifier (10) is a floor-standing type that is installed on the floor, but may also be a wall-mounted or ceiling-mounted type. The air purifier (10) includes a casing (11), a fan (30), a purification unit (40), a diffusing unit (50), and an opening / closing mechanism (60). As will be described in detail later, the diffusing unit (50) of embodiment 3 is configured to diffuse an aromatic substance or a substance that acts on the autonomic nervous system.

[0084] The casing (11) is formed in the shape of a hollow box. The casing (11) has a first side plate (11a), a second side plate (11b), an upper plate (11c), and a lower plate (11d). A first suction port (12A) is formed in a lower portion of the first side plate (11a). A second suction port (12B) is formed in a lower portion of the second side plate (11b). A first air outlet (13A) and a second air outlet (13B) are formed in the upper plate (11c). In this example, the first air outlet (13A) is located closer to the second side plate (11b) than the second air outlet (13B).

[0085] An air flow path (20) through which air from the target space (S) flows is formed inside the casing (11). The air flow path (20) has a first flow path (21), a second flow path (22), and an upstream flow path (24) that is a main flow path. The first flow path (21) and the second flow path (22) are parallel to each other. The inlet end of the first flow path (21) and the inlet end of the second flow path (22) are connected to the upstream flow path (24). The outlet end of the first flow path (21) is connected to the first outlet (13A). The outlet end of the second flow path (22) is connected to the second outlet (13B). The first suction port (12A) and the second suction port (12B) are connected to the upstream flow path (24).

[0086] The purifying section (40) is disposed in the first flow path (21). The purifying section (40) of this embodiment is configured to adsorb or decompose VOCs. Examples of VOCs include benzene and formaldehyde. The purifying section (40) is configured to adsorb or decompose a first substance emitted by the emitting section (50). The first substance is a fragrance or a substance that acts on the autonomic nervous system. Examples of fragrances include lavender and grapefruit. Examples of substances that act on the autonomic nervous system include linalool. Examples of the purifying section (40) that adsorbs or decomposes VOCs, fragrances, or substances that act on the autonomic nervous system include activated carbon.

[0087] The diffusion unit (50) of the third embodiment includes a tank (51), a chamber (52), a suction pipe (53), a pump (54), and a nozzle (55). The tank (51) stores a substance, specifically, a first substance, which is a component to be diffused. The chamber (52) is fixed to the upper portion of the tank (51) and defines a chamber (52a) therein. The suction pipe (53) connects the interior of the tank (51) to the chamber (52a). The outlet side of the suction pipe (53) is connected to the discharge flow path (54a) of the air pump (54). The inlet end of the nozzle (55) communicates with the chamber (52a), and the outlet end of the nozzle (55) communicates with the second flow path (22). Thus, in the third embodiment, the nozzle (55) of the diffusion unit (50) is disposed in the second flow path (22). When the pump (54) is operated, the first substance in the tank (51) is drawn into the chamber (52a) through the suction pipe (53). The first substance in the chamber (52a) is diffused into the second flow path (22) through the nozzle (55). A supply port for diffusing the component may be formed in a wall defining the second flow path (22). In this case, the supply port constitutes a part of the diffusion section disposed in the second flow path (22).

[0088] The upstream flow path (24) is provided with a fan (30) and a collection unit for collecting dust in the air. In this embodiment, the collection unit includes a first prefilter (71), a second prefilter (72), and a main filter (73). The first prefilter (71) is disposed at the rear of the first suction port (12A), and the second prefilter (72) is disposed at the rear of the second suction port (12B). The main filter (73) is disposed above the fan (30). The first prefilter (71) and the second prefilter (72) physically collect relatively large dust particles. The main filter (73) physically collects relatively small dust particles. The main filter (73) is, for example, a HEPA filter. The collection unit may be an electrostatic precipitator that electrically attracts and collects dust particles. The particle diameter of the particles collected by the collection unit is 0.1 μm or greater.

[0089] The opening / closing mechanism (60) of the third embodiment is configured with an opening / closing damper (63). The opening / closing damper (63) is switchable between a first state shown in FIG. 9 and a second state shown in FIG. 10. When the opening / closing damper (63) is in the first state, the first flow path (21) is opened and the second flow path (22) is closed. Specifically, the upstream flow path (24) and the first flow path (21) are connected to each other, and the upstream flow path (24) and the second flow path (22) are blocked from each other. When the opening / closing damper (63) is in the second state, the first flow path (21) is closed and the second flow path (22) is opened. Specifically, the upstream flow path (24) and the second flow path (22) are connected to each other, and the upstream flow path (24) and the first flow path (21) are blocked from each other.

[0090] The air purifier (10) of the third embodiment switches between a cleaning operation and a dissipation operation, similarly to the first embodiment.

[0091] In the cleaning operation shown in FIG. 9 , the controller (100) stops the pump (54), operates the fan (30), and switches the on-off damper (63) to the first state. In the cleaning operation, the deodorizing function of the purifier (40) is activated. Air from the target space (S) flows into the upstream flow path (24) through the first suction port (12A) and the second suction port (12B). In the upstream flow path (24), the first prefilter (71) and the second prefilter (72) capture relatively large dust particles in the air. In the upstream flow path (24), the main filter (73) captures relatively small dust particles in the air.

[0092] The air in the upstream flow path (24) flows through the first flow path (21). In the first flow path (21), the purifier section (40) adsorbs or decomposes the target substance, specifically, VOCs, in the target space (S). The air that has passed through the purifier section (40) is supplied to the target space (S) through the second outlet (13B).

[0093] In this way, during the cleaning operation, the first substance is not supplied from the diffusion section (50) to the target space (S), and therefore the first substance is not removed by the purification section (40). Furthermore, the cleaning capacity of the purification section (40) is used to treat the substance that should be treated in the target space (S), specifically, VOCs. Therefore, the target space (S) can be efficiently cleaned while suppressing unnecessary consumption of the first substance.

[0094] In the dissipation operation shown in FIG. 10 , the controller (100) operates the pump (54) and the fan (30) and switches the on-off damper (63) to the second state. In the dissipation operation, the deodorizing function of the purification section (40) is stopped. Air from the target space (S) flows into the upstream flow path (24) through the first and second suction ports (12A and 12B). In the upstream flow path (24), the first and second prefilters (71 and 72) capture relatively large dust particles in the air. In the upstream flow path (24), the main filter (73) captures relatively small dust particles in the air.

[0095] In the diffusion operation, the diffusion section (50) diffuses the first substance, so that the first substance is contained in the air in the target space (S). However, while the first pre-filter (71), the second pre-filter (72), and the main filter (73) have the function of capturing dust, they do not essentially have the function of capturing the first substance. Therefore, the first substance in the air is hardly removed by these trapping sections. In other words, the cleaning ability of the trapping sections is used to treat dust in the air.

[0096] The air in the upstream flow path (24) flows through the second flow path (22). In the second flow path (22), the first substance diffused from the diffusion section (50) is added to the air. The air containing the first substance is supplied to the target space (S) through the second outlet (13B). As a result, the effect of the first substance can be exerted on a subject present in the target space (S).

[0097] (8) Other Embodiments The purifying section (40) may include an ultraviolet ray generating unit that purifies the air by irradiating it with ultraviolet rays, or an electric dust collecting unit that collects dust particles in the air.

[0098] The adjusting unit may be configured to adjust only the air flow rate of the first flow path (21). Specifically, the adjusting unit may be an opening / closing mechanism or a flow rate adjusting mechanism arranged only in the first flow path (21). In this case, too, the controller (100) controls the adjusting unit so that the air flow rate of the first flow path (21) is smaller than the air flow rate of the second flow path (22).

[0099] The diffusing section (50) may also diffuse other components other than the inhibitor, such as a fragrance component or a chemical component that imparts a specific function to the human body.

[0100] The number of collection units is not limited to that in the configuration of embodiment 3. The collection unit may have, for example, one pre-filter or one main filter.

[0101] The controller (100) may be provided in the server device (120) or the communication terminal (130). In this case, the server device (120) or the communication terminal (130) constitutes a part of the air purifier (10) (air purification system).

[0102] Although the embodiments and modifications have been described above, it will be understood that various modifications in form and details are possible without departing from the spirit and scope of the claims. Furthermore, the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate as long as the functionality of the subject matter of the present disclosure is not impaired.

[0103] The above-mentioned descriptions such as "first," "second," "third," etc. are used to distinguish the words to which these descriptions are attached, and do not limit the number or order of the words.

[0104] As described above, the present disclosure is useful for air purifiers.

[0105] 10 Air purifier 21 First flow path 22 Second flow path 30A First fan (adjustment section) 30B Second fan (adjustment section) 40 Purifying section 50 Dissipation section 60 Opening / closing mechanism 71 First pre-filter (collection section) 72 Second pre-filter (collection section) 73 Main filter (collection section) 100 Controller S Target space

Claims

1. An air purifier comprising: a purification section (40) that purifies air in a target space (S); a diffusion section (50) that diffuses components to be supplied to the target space (S); a first flow path (21) in which the purification section (40) is arranged, through which air in the target space (S) flows and for sending the air to the target space (S); a second flow path (22) in which the diffusion section (50) is arranged, through which air in the target space (S) flows and for sending the air to the target space (S); and an adjustment section (30A, 30B, 60) that adjusts at least the air flow rate of the first flow path (21).

2. The air purifier according to claim 1, further comprising a controller (100) that controls the adjustment unit (30A, 30B, 60) to perform a first operation in which the air flow rate in the first flow path (21) is smaller than the air flow rate in the second flow path (22).

3. The air purifier according to claim 2, wherein the adjustment units (30A, 30B, 60) are configured to adjust the air flow rates in the first flow path (21) and the second flow path (22), and the controller (100) controls the adjustment units (30A, 30B, 60) to perform a second operation in which the air flow rate in the first flow path (21) is greater than the air flow rate in the second flow path (22).

4. The air purifier according to any one of claims 1 to 3, wherein the adjustment section (30A, 30B, 60) is an opening / closing mechanism (60) that switches between a first state in which the first flow path (21) is open and the second flow path (22) is closed, and a second state in which the first flow path (21) is closed and the second flow path (22) is open.

5. The air purifier according to any one of claims 1 to 3, wherein the adjustment section (30A, 30B, 60) includes a variable air volume first fan (30A) arranged in the first flow path (21), and a variable air volume second fan (30B) arranged in the second flow path (22).

6. The air purifier according to any one of claims 1 to 5, wherein the diffusing section (50) diffuses an inhibitor that inhibits insect activity.

7. The air purifier according to any one of claims 1 to 6, wherein the purifying section (40) includes a filter section (41) or an adsorption section (43).

8. The air purifier according to any one of claims 1 to 7, wherein the purifying section (40) is configured to adsorb or decompose VOCs.

9. The air purifier according to claim 8, further comprising a collection unit (71, 72, 73) that collects dust in the air in the target space (S).

10. The air purifier according to claim 9, further comprising an upstream flow path (24) connecting an inlet end of the first flow path (21) and an inlet end of the second flow path (22) and through which air from the target space (S) flows, and the collection section (71, 72, 73) is disposed in the upstream flow path (24).

11. An air purifier according to any one of claims 1 to 10, wherein the diffusing section (50) is configured to diffuse an aromatic substance or a substance that acts on the autonomic nervous system, and the purifying section (40) is configured to adsorb or decompose the aromatic substance or the substance that acts on the autonomic nervous system.

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