JP6952821B2 - Air cleaner - Google Patents

Description

The present invention relates to an air purifier that purifies dirty air in a target space.

An air purifier is a device that purifies the air by removing dirt, that is, dust, odor, etc. in the air of the target room. As such an air purifier, for example, there is one as shown in Patent Document 1. Patent Document 1 discloses an electrostatic precipitator and a HEPA filter (High Efficiency Particulate Air Filter) as means for removing dust in contaminated air in an air purifier.

Here, electrostatic precipitator forms a discharge space by applying a high voltage of several kV (for example, 10 kV) between metal electrodes, and positively or negatively charges the dust in the air passing through the discharge space. This is a method in which the charged dust is adsorbed by a Coulomb force on a conductive dust collecting filter having a potential opposite to that of the dust to collect the dust. The electrostatic precipitator has the following features.
(1) If it is a small one to be mounted on an air purifier for a general house, the dust collection rate is about several tens of percent (for example, 60%), which is lower than that of a HEPA filter.
(2) Since the gap between the electrodes is as large as several mm to several tens of mm (for example, 10 mm), the pressure loss is as low as several Pa to several tens of Pa (for example, 10 Pa).
(3) Since the metal electrodes and the dust collecting filter can be cleaned by washing with water, they generally do not need to be replaced.

Further, the HEPA filter is mainly made of glass fibers having a diameter of 1 μm to 10 μm or less, and the voids between the fibers have a size of several tens of μm. According to the JIS standard, "an air filter that has a particle collection rate (dust collection rate) of 99.97% or more and an initial pressure loss of 245 Pa or less with respect to particles with a rated air volume of 0.3 μm." Is defined as a HEPA filter. Since the HEPA filter is very brittle and difficult to clean when it is clogged, it is common to replace it after using it for a certain period of time.

JP-A-2002-174443

As a dust collecting means of such a conventional air purifier, the HEPA filter has a high dust collecting capacity but needs to be replaced when it becomes dirty, and the electrostatic precipitator does not need to be replaced (cleanable), but the dust collecting capacity is inferior to that of the HEPA filter. ing. That is, in the conventional air purifier, the characteristics of the air purifying operation that can be performed are determined by the installed air purifying means, and it is appropriate according to the usage environment conditions such as the degree of air pollution or the ease of use for the user. It was difficult to carry out an air cleaning operation.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an air purifier that performs an appropriate air purifying operation according to the usage environment conditions or usage.

The air purifier according to the present invention is provided in a main body case having an air supply port, an exhaust port, and a ventilation path communicating the air supply port and the exhaust port, and indoor air from the air supply port. A first air purifying means that is provided in the air passage and purifies the indoor air taken in from the air supply port , and is a first air purifying means that does not require replacement, and a first air purifying means that discharges from the intake / exhaust port. Controls the operation of a plurality of air purifying means including a second air purifying means which has higher cleaning performance than the first air purifying means and needs to be replaced, and a blower means, and also determines the amount of air pollution components in the room. and control means for respectively enable or disable the functions of several air cleaning unit on the basis of the control means, a first threshold value of the amount of level less side soil components, often the level of the amount of soil components It has a second threshold on the side, and when the amount of air pollution component is less than the first threshold, the function of the first air purifying means among the plurality of air purifying means is invalidated, and the second Control to enable the function of the air purifying means, and when the amount of the air pollution component is more than the first threshold and less than the second threshold, the first air purifying means among the plurality of air purifying means and Control is performed to enable the function of the second air purifying means, and when the amount of the air pollution component is larger than the second threshold value, the function of the first air purifying means among the plurality of air purifying means is enabled. , It is characterized in that the control for disabling the function of the second air purifying means is performed.

Since the present invention is configured as described above, it is possible to provide an air purifier that performs an appropriate air purifying operation according to the usage environment conditions such as the degree of air pollution or the usage of the user.

It is sectional drawing of the air purifier which concerns on Embodiment 1 of this invention. It is a figure which shows the operation state at the time of closing the bypass air passage of the air purifier which concerns on Embodiment 1 of this invention. It is a figure which shows the operation state at the time of opening the bypass air passage of the air purifier which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the function switching of the air purifying means according to the amount of air pollution of the air purifier which concerns on Embodiment 1 of this invention. It is a flowchart which shows an example of the control of the air purifier which concerns on Embodiment 1 of this invention. It is a figure which shows another example of the function switching of the air purifying means according to the amount of air pollution of the air purifier which concerns on Embodiment 1 of this invention. It is a figure which shows still another example of the function switching of the air purifying means according to the amount of air pollution of the air purifier which concerns on Embodiment 1 of this invention. It is a figure which shows another example of the function switching of the air purifying means according to the amount of air pollution of the air purifier which concerns on Embodiment 1 of this invention. It is a flowchart which shows an example of the control of the air purifier which concerns on Embodiment 2 of this invention. It is a flowchart which shows another example of control of the air purifier which concerns on Embodiment 2 of this invention. It is sectional drawing of the air purifier which concerns on Embodiment 3 of this invention. It is sectional drawing of the air purifier which concerns on Embodiment 4 of this invention. It is a flowchart which shows an example of the control of the air purifier which concerns on Embodiment 4 of this invention. It is sectional drawing of the air purifier which concerns on Embodiment 5 of this invention. It is sectional drawing of the air purifier which concerns on Embodiment 6 of this invention. It is a block diagram of the control part in the case where the function of the control part in the air purifier of Embodiments 1 to 6 is realized by the dedicated hardware. FIG. 5 is a configuration diagram of a control unit when the function of the control unit in the air purifiers 1 to 6 is realized by a processor that executes a program stored in a memory.

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

Embodiment 1.
FIG. 1 is a cross-sectional configuration diagram of the air purifier according to the first embodiment of the present invention, FIGS. 2 and 3 are views showing an operating state when the bypass air passage of the air purifier is closed and opened, FIGS. FIG. 8 is a diagram showing an example of function switching of the air purifying means according to the amount of air pollution, and FIG. 5 is a flowchart showing control of the air purifier.

First, the configuration of the air purifier 1 according to the first embodiment will be described with reference to FIG. In FIG. 1, the air purifier 1 is for supplying an air supply port 2 for taking in indoor air of a room in which the air purifier 1 is installed and air purified by an air purifying means described later into the room. It has a main body case 4 provided with an exhaust port 3, and in the main body case 4, a ventilation passage 6 connecting the air supply port 2 and the exhaust port 3 and a fan 5a and a motor arranged in the ventilation passage 6 are provided. It is provided with a blower 5 as a blower means including 5b. Further, in the ventilation passage 6, on the downstream side of the fan 5a when viewed from the air supply port 2, an air purifying means for collecting electrostatic dust with respect to the air taken in, and an electric dust collector 8 as a first air purifying means. Further downstream of the electrostatic precipitator 8, a HEPA filter 9 which is an air purifying means for collecting dust for the air passing through the electrostatic precipitator 8 and as a second air purifying means is arranged. Further, in the ventilation passage 6, a bypass air passage 7 that guides the air that has passed through the electrostatic precipitator 8 to the exhaust port 3 without passing through the HEPA filter 9 and an air that has passed through the electrostatic precipitator 8 are passed through the HEPA filter 9 side. A damper 10 is provided for switching between passing through the air filter or passing through the bypass air passage 7 side. Further, the air purifier 1 has a control unit 13 as a control means for controlling the operation of the blower 5, the electrostatic precipitator 8, and the damper 10, and the remote controller 11 is connected to the control unit 13 via the communication line 12. ing. In the following description, the remote controller will be referred to as a remote controller. The remote controller 11 is provided with a dust sensor 14 for detecting the amount of dust in the indoor air, and a button operation (start or stop of air cleaning operation, etc.) on the remote controller 11 and dust in the indoor air detected by the dust sensor 14 are provided. An operation command based on the amount of is transmitted to the control unit 13.

In FIG. 1, the solid line arrow A indicates the flow of air discharged from the air supply port 2 through the electrostatic precipitator 8 and the HEPA filter 9 by the blower 5, and is discharged from the exhaust port 3. B shows the flow of air discharged from the exhaust port 3 through the bypass air passage 7 without passing through the HEPA filter 9.

The electrostatic collector 8 includes a metal positive electrode (not shown) to which a high voltage of about 10 kV is applied, a metal ground electrode (not shown) having a potential equivalent to the ground potential, and a positive electrode and a ground electrode. On the other hand, a conductive dust collecting filter (not shown) having a potential equivalent to the ground potential is arranged after the ventilation passage 6. By applying a high voltage between the positive electrode and the ground electrode to form a discharge space, the dust passing through the discharge space is charged, and the charged dust is attracted to the ground electrode or the dust collection filter by Coulomb force to collect the dust. It is a thing.

The HEPA filter 9 is made of glass fibers having a diameter of about 1 μm to 10 μm or 10 μm or less, and the gaps between the fibers are about several tens of μm. As described above, it has a higher dust collection rate than the electrostatic precipitator 8.

Next, the basic operation of the air purifier 1 will be briefly described with reference to FIGS. 2 and 3. FIG. 2 is a diagram showing an operating state when the bypass air passage of the air purifier is closed. When the bypass air passage 7 is closed by the switching control of the damper 10, all the air that has passed through the electrostatic precipitator 8 passes through the HEPA filter 9 and is supplied into the room from the exhaust port 3. The arrow shown in FIG. 2 indicates the air flow when the bypass air passage 7 is closed.

FIG. 3 is a diagram showing an operating state when the bypass air passage of the air purifier is opened. When the bypass air passage 7 is opened by the switching control of the damper 10, the air that has passed through the electrostatic precipitator 8 does not pass through the HEPA filter 9, but all passes through the bypass air passage 7 and is supplied into the room from the exhaust port 3. Will be. The arrow shown in FIG. 3 indicates the air flow when the bypass air passage 7 is opened. That is, by controlling the damper 10 to close or open the bypass air passage 7, it is possible to switch whether or not to allow air to pass through the HEPA filter 9, in other words, to enable or disable the function of the HEPA filter 9. Can be switched. Regarding the electrostatic precipitator 8, it is possible to switch whether to enable or disable the function of the electrostatic precipitator 8 depending on whether or not a high voltage is applied to the electrodes of the electrostatic precipitator 8.

The control unit 13 determines the operation mode of the air purifier 1 by combining the above-mentioned switching control of the damper 10 and the power supply control of the electrostatic precipitator 8 (on / off of applying a high voltage to the electrodes). There are the following three operation modes.
(1) Dust collection using an electrostatic precipitator 8 and a HEPA filter 9 (double dust collection operation)
(2) Dust collection using only the electrostatic precipitator 8 (electrostatic precipitator operation)
(3) Dust collection using only the HEPA filter 9 (HEPA dust collection operation)

Next, the characteristics of each operation mode will be shown.
(1) Double dust collecting operation The electric dust collector 8 is operated (a high voltage is applied between the electrodes) to collect electric dust, and the bypass air passage 7 is closed by the damper 10 to collect dust by the HEPA filter 9. As a result, a very high dust collection rate can be obtained. Further, by passing the air after electrostatic precipitating through the HEPA filter 9, the amount of dust collected by the HEPA filter 9 can be reduced, so that the replacement cycle of the HEPA filter 9 can be lengthened.
(2) Electrostatic precipitator operation The electrostatic precipitator 8 is operated (a high voltage is applied between the electrodes) to collect electrostatic dust, and the bypass air passage 7 is opened by the damper 10 to remove the air after electrostatic precipitator 9 from the HEPA filter 9. Pass through the bypass air passage 7 side instead of the side. Therefore, dust is not collected by the HEPA filter 9. As a result, the dust collection rate is lower than that of the double dust collection operation, but since it is possible to suppress the adhesion of dust to the HEPA filter 9, the replacement cycle of the HEPA filter 9 can be lengthened.
(3) HEPA dust collector operation Electrodust collection is not performed by stopping the electrostatic precipitator 8 (no high voltage is applied between the electrodes), but by closing the bypass air passage 7 with the damper 10, the electrostatic precipitator 8 is operated. The passing air is collected by the HEPA filter 9. As a result, although the dust collection rate is slightly inferior to that of the double dust collection operation, almost the same high dust collection rate can be obtained. Moreover, since electrostatic precipitators are not collected, power consumption can be reduced.

Next, using FIGS. 4 and 5, air cleaning is performed by selecting one from three operation modes based on the amount of dust in the air detected by the control unit 13 of the air purifier 1 by the dust sensor 14. The operation of operation will be described. FIG. 4 is a diagram showing an example of function switching of the air purifying means according to the amount of air pollution, and FIG. 5 is a flowchart showing control of the air purifier in that case.

In FIG. 4, the control unit 13 has two threshold values, that is, a first threshold value on the side where the dust amount level is low and a second threshold value on the side where the dust amount level is high. When the amount of dust detected by the dust sensor 14 is less than the first threshold value, the amount of dust collected by the electrostatic precipitator 8 is small, so that the effect of reducing the amount of dust in the indoor air cannot be expected so much as compared with the current situation, but HEPA Since a high dust collection effect can be obtained with the filter 9, the operation mode is set to (3) HEPA dust collection operation (electrostatic dust collection function: disabled (high voltage stop), HEPA dust collection function: enabled (air is passed through the HEPA filter 9 side)). And. In this case, since dust is collected from clean air below the first threshold value, the amount of dust collected by the HEPA filter 9 can be reduced. Further, wasteful power consumption can be reduced by stopping the electrostatic precipitator 8 which cannot be expected to have a dust collecting effect. In FIG. 4, and FIGS. 6, 7, and 8 described later, “◯” indicates valid and “x” indicates invalid. The control unit 13 is charged with electricity depending on whether the dust amount is less than the first threshold value, the dust amount is equal to or more than the second threshold value, or the dust amount is equal to or more than the first threshold value and less than the second threshold value. The combination of enabling or disabling the function of the dust collector 8 and the function of the HEPA filter 9 shall be different.

If the amount of dust detected by the dust sensor 14 is equal to or greater than the first threshold value and less than the second threshold value, a high dust collection rate is required because the indoor air is dirty, but dust collection is required only by the HEPA filter 9. Then, since the amount of dust collected by the HEPA filter 9 increases, the replacement cycle of the HEPA filter 9 may be shortened. Therefore, the operation modes are set to (1) double dust collection operation (electrostatic dust collection function: effective (high voltage application), HEPA dust collection function: effective (air is passed through the HEPA filter 9 side)). In this case, since the HEPA filter 9 collects the air after the dust is collected by the electrostatic precipitator 8, the amount of dust collected by the HEPA filter 9 can be reduced.

When the amount of dust detected by the dust sensor 14 is equal to or greater than the second threshold value, the indoor air is extremely polluted. Therefore, when dust is collected using the HEPA filter 9, it is a case where the dust collector 8 is used in combination. However, the amount of dust collected by the HEPA filter 9 increases and the replacement cycle of the HEPA filter 9 is shortened. Function: Invalid (pass air through the bypass air passage 7 side). In this case, since the amount of dust in the air is originally large, the dust collection effect can be expected even if only the electrostatic precipitator 8 having a relatively low dust collection rate is operated. Further, since the HEPA filter 9 is not used, the replacement cycle of the HEPA filter 9 can be lengthened.

Next, the flow of operation control of the air purifier 1 based on the amount of dust in the air shown in FIG. 4 will be described with reference to FIG. The control unit 13 of the air purifier 1 starts the air purifying operation according to the operation command from the remote controller 11. First, when the blower 5 is operated in step S1 of FIG. 5, an air flow from the air supply port 2 to the exhaust port 3 through the ventilation passage 6 is generated. As a result, the air in the room is taken in from the air supply port 2. On the other hand, the dust sensor 14 provided on the remote controller 11 measures the amount of dust in the air in the room (step S2). The control unit 13 compares the amount of dust measured in step S2 with the second threshold value (step S3). Here, if the dust amount ≥ the second threshold value, the process proceeds to step S4, the electrostatic precipitator 8 is turned on (a high voltage is applied between the electrodes), and the bypass air passage 7 is opened by the damper 10. Therefore, the air taken in from the air supply port 2 passes only through the electrostatic precipitator 8 performing the electrostatic precipitator operation, and is resupplied into the room from the exhaust port 3 via the bypass air passage 7 ((2). ) Conducted electrostatic precipitator operation).

In step S3, if the dust amount <second threshold value, the process proceeds to step S5, and the control unit 13 compares the dust amount measured in step S2 with the first threshold value. Here, if the dust amount ≥ the first threshold value, the process proceeds to step S6, the electrostatic precipitator 8 is turned on (a high voltage is applied between the electrodes), and the bypass air passage 7 is closed by the damper 10. Therefore, the air taken in from the air supply port 2 passes through the electrostatic precipitator 8 and the HEPA filter 9 that are performing the electrostatic precipitator operation, and is re-supplied to the room from the exhaust port 3 ((1) double dust collection operation). Implemented).

In step S5, if the amount of dust is less than the first threshold value, the process proceeds to step S7, the electrostatic precipitator 8 is turned off (no voltage is applied between the electrodes), and the bypass air passage 7 is closed by the damper 10. Therefore, the air taken in from the air supply port 2 passes through the electrostatic precipitator 8 and the HEPA filter 9 that are not performing the electrostatic precipitator operation, and is supplied again to the room from the exhaust port 3 ((3) HEPA dust collector). Carry out operation).

After the processing of step S4, step S6, and step S7, the process returns to step S2 and the subsequent control is repeated. The first threshold value and the second threshold value may be set in the control unit 13 at the time of shipment, or may be set by the user by operating the remote controller 11. Further, in step S7, it may be determined that the dust collecting operation is not necessary because the indoor air is extremely clean, and the electrostatic precipitator 8 may be turned off and the bypass air passage 7 may be opened by the damper 10.

The operation command for starting the air purifying operation is not only transmitted by the button operation of the remote control 11, but also the amount of dust detected by the dust sensor 14 when the air purifier 1 is stopped is the first. Even when it exceeds the threshold value or exceeds the second threshold value, it may be transmitted and automatically shift to the air cleaning operation ((1) double dust collection operation or (2) electrostatic precipitator operation).

According to the above control, when the indoor air is extremely dirty, even the electrostatic precipitator 8 having a low dust collecting ability can sufficiently purify the air. Therefore, the electrostatic precipitator 8 is mainly operated and the indoor air is released. If it is relatively clean, the HEPA filter 9 can mainly function to make it cleaner.

Further, since the HEPA filter 9 is not passed when the indoor air is extremely dirty and the HEPA filter 9 is passed when the indoor air is relatively clean, the amount of dust collected by the HEPA filter 9 is large. It can be reduced and the replacement cycle of the HEPA filter 9 can be lengthened. Even in the double dust collection operation performed when the air in the room is relatively dirty, since the HEPA filter 9 is arranged after the electrostatic precipitator 8 performing the electrostatic precipitator operation, the HEPA filter 9 is used. The amount of dust collected can be reduced and the replacement cycle can be lengthened.

Further, although the examples of FIGS. 4 and 5 are used in the above description, the same effect can be obtained by performing the controls shown in FIGS. 6 and 7. FIG. 6 shows a control example in which the operation modes of the air purifier 1 are limited to the double dust collection operation and the electrostatic precipitator operation, and the operation mode is switched between the two modes. When the amount of dust detected by the dust sensor 14 is less than the second threshold value, the control unit 13 sets the operation mode to double dust collection operation, and the amount of dust detected by the dust sensor 14 is equal to or greater than the second threshold value. In this case, the operation mode is set to electrostatic precipitator operation. In this case, even if the amount of dust is less than the first threshold value, the HEPA dust collection operation is not performed as shown in FIG. 4, and the operation mode continues the double dust collection operation. Therefore, the HEPA filter 9 is used. The amount of dust collected can be reduced, and the replacement cycle of the HEPA filter 9 can be further extended. The second threshold value in FIG. 6 does not have to be the same value as the second threshold value in FIG.

FIG. 7 shows a control example in which the operation modes of the air purifier 1 are limited to the electrostatic precipitator operation and the HEPA dust collector operation, and the operation mode is switched between these two modes. When the amount of dust detected by the dust sensor 14 is less than the first threshold value, the control unit 13 sets the operation mode to HEPA dust collection operation, and the amount of dust detected by the dust sensor 14 is equal to or more than the first threshold value. In this case, the operation mode is set to electrostatic precipitator operation. In this case, since the HEPA filter 9 collects dust only when the amount of dust is small (less than the first threshold value), the replacement cycle of the HEPA filter 9 can be further extended. The first threshold value in FIG. 7 does not have to be the same value as the first threshold value in FIG. It may be the same as the second threshold value in FIG. 4, or may be an intermediate value between the first threshold value and the second threshold value in FIG.

In FIGS. 4, 6 and 7, different types of air purifying means such as an electrostatic precipitator 8 and a HEPA filter 9 are used to compare the amount of dust in the air with a threshold value in order to collect and clean the dust in the air. Although the case of switching and using the air purifying means is shown, a combination of the same method with different capacities or a combination of the same method with different prices may be used. For example, the expensive air purifying means can be used so that the replacement cycle is as long as possible.

In addition, when used in combination with air purifying means having different capacities, the following usage is possible. FIG. 8 is an example showing switching control of an air purifier provided with a high-capacity air purifying means and a low-capacity air purifying means. It is assumed that two levels of threshold values (first threshold value and second threshold value) are set for the air pollution component amount D. When the amount of pollutant component D in the air is large (D ≧ second threshold value), the functions of both the high-capacity air purifying means and the low-capacity air purifying means are controlled to be effective. That is, the air purifier 1 operates at full power to quickly purify the air. In addition, when the amount of pollutant component D of the air is medium (second threshold value> D ≥ first threshold value), the function of only the high-capacity air cleaning means is enabled, and the function of the low-capacity air cleaning means is invalidated. Control to. That is, the air purifier 1 operates at middle power. Further, when the amount D of the pollutant component of the air is small (first threshold value> D), the function of the high-capacity air purifying means is invalidated, and only the function of the low-capacity air purifying means is controlled to be enabled. That is, the air purifier 1 operates at low power. The control unit 13 is high depending on whether the amount of dust is less than the first threshold value, the amount of dust is equal to or more than the second threshold value, or the amount of dust is equal to or more than the first threshold value and less than the second threshold value. The combination of enabling or disabling the function of the capable air purifier and the function of the low capacity air purifier shall be different.

Therefore, as in the case of FIGS. 4, 6 and 7, it is possible to provide a comfortable air environment by performing an appropriate air cleaning operation according to the usage environment conditions such as the degree of air pollution. In the above description, the air cleaning method is switched by using two air cleaning means and one damper 10, but the same switching control can be performed by using three or more air cleaning means or two or more dampers. Is possible.

Since the air purifier 1 of the first embodiment is configured as described above, it is possible to provide a comfortable air environment by performing an appropriate air purifying operation according to the usage environment conditions such as the degree of air pollution. Is. Further, in the case of the configurations shown in FIGS. 4, 6 and 7, it is possible to lengthen the replacement cycle by operating in an appropriate operation mode for the air cleaning means such as the HEPA filter 9 that needs to be replaced. Therefore, the work and cost associated with the replacement can be reduced.

Further, the air purifier 1 of the first embodiment performs the air cleaning operation based on the dust amount detected by the dust sensor 14 provided in the remote controller 11, but the dust amount information is obtained by the dust sensor provided in the remote controller 11. In addition to 14, the amount of dust detected by a device other than the air purifier 1 may be acquired by a wired or wireless communication means.

Embodiment 2.
In the air purifier 1 according to the first embodiment, the air purifying operation is performed by switching the operation mode by a plurality of air purifying means based on the result of comparison between the amount of dirt components in the air in the room and the preset threshold value. bottom. The air purifier 1 according to the second embodiment is configured to switch the operation mode by a plurality of air purification means in consideration of the elapsed time in the predetermined operation mode.

FIG. 9 is a flowchart showing an example of control of the air purifier according to the second embodiment of the present invention, and FIG. 10 is a flowchart showing another example of control of the air purifier according to the second embodiment. First, an example of the control operation of the second embodiment will be described with reference to FIG.

The control unit 13 of the air purifier 1 starts the air purifying operation according to the operation command from the remote controller 11. First, the operation of the blower 5 is started in step S11 of FIG. As a result, the air in the room is taken in from the air supply port 2. Further, in step S12, the electrostatic precipitator operation timer provided in the control unit 13 is cleared to zero. In step S13, the amount of dust in the air in the room is measured by the dust sensor 14. The control unit 13 compares the amount of dust measured in step S13 with the second threshold value (step S14). Here, if the dust amount ≥ the second threshold value, the process proceeds to step S15, and the electrostatic precipitator operation timer is counted. Next, in step S16, it is determined whether or not the electrostatic precipitator operation timer is equal to or more than a predetermined value (for example, 60 minutes). If the electrostatic precipitator operation timer is less than a predetermined value, the process proceeds to step S17, and the electrostatic precipitator operation is performed by turning on the electrostatic precipitator 8 and opening the bypass air passage 7. If the determination in step S16 indicates that the electrostatic precipitator operation timer is equal to or greater than a predetermined value, the process proceeds to step S18, and double dust collection operation is performed by turning on the electrostatic precipitator 8 and closing the bypass air passage 7. That is, if the amount of dust is equal to or greater than the second threshold even if the electrostatic precipitator operation is continuously executed for a predetermined time (60 minutes) or longer, it is determined that the dust precipitating capacity is insufficient in the electrostatic precipitator operation. , Switch to double dust collection operation to improve dust collection capacity and reduce the amount of dust in the room.

In step S14, if the amount of dust <the second threshold value, the process proceeds to step S19, and the electrostatic precipitator operation timer is cleared to zero. Next, the control unit 13 compares the amount of dust measured in step S13 with the first threshold value (step S20). Here, when the dust amount ≥ the first threshold value, the process proceeds to step S18, and the double dust collection operation is performed by turning on the electrostatic precipitator 8 and closing the bypass air passage 7. If the dust amount is less than the first threshold value in the determination in step S20, the process proceeds to step S21, and the HEPA dust collection operation is performed by turning off the electrostatic precipitator 8 and closing the bypass air passage 7. After the processing of step S17, step S18, and step S21, the process returns to step S13 and the subsequent control is repeated.

In the example shown in FIG. 9, since the above control is performed, even if the air cleaning operation is performed in an appropriate operation mode according to the amount of dust in the air, the operation is performed in the selected operation mode for a certain period of time or longer. If the amount of dust in the air is not improved, the operation is switched to a higher capacity air cleaning operation, so that the indoor air cleaning operation can be further promoted. That is, FIG. 9 is a control example when the air purifying power is prioritized.

Next, another example of the control operation of the second embodiment will be described with reference to FIG. The control unit 13 of the air purifier 1 starts the air purifying operation according to the operation command from the remote controller 11. First, the operation of the blower 5 is started in step S31. As a result, the air in the room is taken in from the air supply port 2. Next, in step S32, the double dust collection operation timer provided in the control unit 13 is cleared to zero. In step S33, the amount of dust in the air in the room is measured by the dust sensor 14. The control unit 13 compares the amount of dust measured in step S33 with the second threshold value (step S34). Here, if the dust amount ≥ the second threshold value, the double dust collection operation timer is cleared (step S35), and the electrostatic precipitator operation is performed by turning on the electrostatic precipitator 8 and opening the bypass air passage 7 (step). S36).

If the dust amount <second threshold value in step S34, the process proceeds to step S37, and the dust amount measured in step S33 is compared with the first threshold value. Here, when the dust amount ≥ the first threshold value, the process proceeds to step S38, and the double dust collection operation timer is counted. Next, in step S39, it is determined whether or not the double dust collection operation timer is equal to or more than a predetermined value (for example, 60 minutes). If the double dust collection operation timer is less than a predetermined value, the process proceeds to step S40, and the double dust collection operation is performed by turning on the electrostatic precipitator 8 and closing the bypass air passage 7. If the determination in step S39 indicates that the electrostatic precipitator operation timer is equal to or greater than a predetermined value, the process proceeds to step S36, and the electrostatic precipitator operation is performed by turning on the electrostatic precipitator 8 and opening the bypass air passage 7. That is, if the amount of dust is equal to or greater than the first threshold even if the double dust collection operation is continuously executed for a predetermined time (60 minutes) or more, it is considered that the amount of dust collected by the HEPA filter 9 continues to be large. Therefore, there is a concern that the replacement cycle of the HEPA filter 9 will be shortened. Therefore, the replacement cycle of the HEPA filter 9 can be lengthened by switching to the electrostatic precipitator operation using only the electrostatic precipitator 8 and reducing the dust collection by the HEPA filter 9.

If the dust amount <first threshold value in the determination in step S37, the double dust collection operation timer is cleared (step S41), and the process proceeds to step S42 to turn off the electrostatic precipitator 8 and close the bypass air passage 7. Perform HEPA dust collection operation. After the processing of step S36, step S40, and step S42, the process returns to step S33 and the subsequent control is repeated.

In the example shown in FIG. 10, since the above control is performed, even if the air purifying means is performed in an appropriate operation mode according to the amount of dust in the air, the air is operated in the selected operation mode for a certain period of time or longer. When the amount of dust in the air is large, the maintenance cycle can be lengthened because the dust collection by the air purifying means that requires replacement such as the HEPA filter 9 is suppressed. That is, FIG. 10 is a control example in which user-friendliness is prioritized by reducing maintenance.

Since the air purifier 1 of the second embodiment is configured as described above, as in the first embodiment, an appropriate air purifying operation is performed according to the usage environment conditions such as the degree of air pollution, and a comfortable air environment is performed. It is possible to provide. In addition to the degree of air pollution, the operation duration is also a condition for selecting an appropriate air cleaning operation to promote air cleaning operation according to the situation and improve usability for users. It becomes possible.

Embodiment 3.
The air purifier 1 according to the first embodiment has a configuration in which the amount of dirt components in the air in the room is detected by a sensor provided on the remote controller 11. In the air purifier 1 according to the third embodiment, the sensor is provided in the vicinity of the air supply port 2 in the main body case 4. FIG. 11 is a cross-sectional configuration diagram of the air purifier according to the third embodiment of the present invention. First, the configuration of the air purifier 1 according to the third embodiment will be described.

In FIG. 11, a dust sensor 15 for detecting the amount of dust in the indoor air is provided near the air supply port 2 of the main body case 4 of the air purifier 1. The dust sensor 15 is connected to the control unit 13 by a signal line (not shown). Since other configurations are the same as those of the first embodiment (FIG. 1), the description thereof will be omitted. Although the remote controller 11 is not shown in FIG. 11, the remote controller 11 may or may not be present. That is, the effect shown in the third embodiment can be obtained regardless of whether the air purifier 1 is operated by the remote controller 11 or the air purifier 1 has no remote controller 11 and the operation unit is provided in the main body. can.

Next, the operation of the air purifier 1 in the third embodiment will be described. The dust sensor 15 provided near the air supply port 2 that opens toward the indoor space detects the amount of dust in the indoor air, and the information is transmitted to the control unit 13. The control unit 13 selects an appropriate operation mode (combination of a plurality of air purifying means) based on the information on the amount of dust in the air sent from the dust sensor 15, the blower 5, the electrostatic precipitator 8, the damper 10, and the like. To control. Since the detailed description is the same as that of the first embodiment, it will be omitted.

When the dust sensor 15 is located near the air supply port 2, there is an advantage that the degree of contamination of the air actually processed by the air purifying means can be directly monitored. In other words, when selecting and switching the appropriate operation mode according to the degree of air pollution such as the amount of dust, since the air to be processed is directly monitored, more accurate and appropriate control should be executed for the processing target. Is possible.

However, when the air purifier 1 is stopped (the blower 5 is stopped), the movement of the air in the room is small, and the air near the dust sensor 15 is stagnant, the amount of dust detected by the dust sensor 15. The value may differ depending on the amount of dust in the vicinity where the user is present. At this time, for example, a situation may occur in which the air purifier 1 remains stopped even though the air is considerably polluted in the vicinity of the user. On the other hand, the control unit 13 periodically operates the blower 5 weakly (for example, only 3 minutes out of 30 minutes) even when the operation of the air purifier 1 is stopped (the blower 5 is stopped). ), And an air flow from the room is generated near the dust sensor 15, so that the air condition near the user can be monitored. As a result, the air purifier 1 can perform the operation start operation based on the air environment of the place where the user is.

According to the above configuration, the air purifier 1 can select and switch the optimum operation mode by the dust sensor 15 regardless of the presence or absence of the remote controller 11. In addition, since the degree of air pollution of the object to be actually cleaned is directly monitored, it is possible to switch the appropriate operation mode more accurately. Further, even when the dust sensor 15 is installed on the main body side away from the user, the air near the user is polluted by periodically operating the blower 5 to take in the air near the user and monitor the air. It is possible to perform an appropriate start operation of the air cleaning operation according to the condition.

Since the air purifier 1 of the third embodiment is configured as described above, as in the first embodiment, an appropriate air purifying operation is performed according to the usage environment conditions such as the degree of air pollution, and a comfortable air environment is performed. It is possible to provide. In addition, it is possible to more accurately switch the appropriate operation mode of the air purifier 1.

When the remote controller 11 is also provided with the dust sensor 14, when the air purifier 1 is stopped, the operation start operation may be performed according to the amount of dust detected by the dust sensor 14 on the remote controller 11 side. .. As a result, it is not necessary to periodically operate the blower 5 weakly (for example, only for 3 minutes out of 30 minutes), and power consumption can be suppressed. Further, even if the user can set from the remote controller 11 whether to switch the operation mode with the dust sensor 14 provided in the remote controller 11 or the dust sensor 15 provided near the air supply port 2 in the main body case 4. good.

Further, the air purifier 1 according to the third embodiment has a configuration in which indoor air is taken in and blown into the room after air cleaning, but is applied to a ventilation device having an air cleaning function that takes in outdoor air and blows out into the room after air cleaning. You may try to do it. For example, in the vicinity of an urban highway, it can be assumed that the amount of dust is large during the time when the traffic is heavy during the day and the amount of dust is small during the time when the traffic is light at night. Even in the ventilation equipment used in such an environment, it is possible to provide a comfortable air environment by performing an appropriate air cleaning operation according to the usage environment conditions such as the degree of air pollution as in the first embodiment. Is. Further, for an air purifying means such as a HEPA filter 9 that needs to be replaced, the replacement cycle can be lengthened by operating in an appropriate operation mode, so that the work and cost associated with the replacement can be reduced.

Embodiment 4.
In the air purifier 1 according to the first to third embodiments, the amount of dirt components in the air in the room is detected by a sensor, and an appropriate operation mode is selected. The air purifier 1 according to the fourth embodiment has a configuration that realizes switching of the operation mode without using a sensor. FIG. 12 is a cross-sectional configuration diagram of the air purifier according to the fourth embodiment of the present invention, and FIG. 13 is a flowchart showing the control thereof.

The configuration of the air purifier 1 according to the fourth embodiment will be described with reference to FIG. The configuration is the same except that the remote controller 11 of the air purifier 1 of the first to third embodiments or the dust sensors 14 and 15 provided in the main body case 4 are not provided.

Next, an example of the control operation of the fourth embodiment will be described with reference to FIG. The control unit 13 of the air purifier 1 starts the air purifying operation according to the operation command from the remote controller 11. First, the operation of the blower 5 is started in step S51 of FIG. As a result, the air in the room is taken in from the air supply port 2. Further, in step S52, the air cleaning operation timer provided in the control unit 13 is cleared to zero.

Next, in step S53, the air cleaning operation timer is counted, and in step S54, it is determined whether or not the air cleaning operation timer has a predetermined value T1 or more (whether the time during which the air cleaning operation is being performed has passed T1). If the air cleaning operation timer is less than the predetermined value T1, the process proceeds to step S55, and the electrostatic precipitator operation is performed by turning on the electrostatic precipitator 8 and opening the bypass air passage 7.

If the determination in step S54 indicates that the air cleaning operation timer is at least the predetermined value T1, the process proceeds to step S56, and whether the air cleaning operation timer is at least the predetermined value T2 (whether the time during which the air cleaning operation is being performed has passed T2). Judge whether or not. If the air cleaning operation timer is less than the predetermined value T2, the process proceeds to step S57, and double dust collection operation is performed by turning on the electrostatic precipitator 8 and closing the bypass air passage 7.

If the determination in step S56 indicates that the air cleaning operation timer is at least the predetermined value T2, the process proceeds to step S58, and whether the air cleaning operation timer is at least the predetermined value T3 (whether the time during which the air cleaning operation is being performed has passed T3). Judge whether or not. If the air cleaning operation timer is less than the predetermined value T3, the process proceeds to step S59, and the HEPA dust collection operation is performed by turning off the electrostatic precipitator 8 and closing the bypass air passage 7.

After the processing of step S55, step S57, and step S59, the process returns to step S53 and the subsequent control is repeated. If the determination in step S58 indicates that the air purifying operation timer is equal to or greater than the predetermined value T3, the process proceeds to step S60 to stop the blower 5 (stop the operation of the air purifier 1).

According to the above configuration, every time a predetermined time elapses from the start of operation of the air purifier 1, the operation mode is switched in the order of electric dust collection operation, double dust collection operation, and HEPA dust collection operation, and finally stopped. Is executed. That is, it is assumed in advance how the air pollution will be improved by continuing a certain operation mode for a predetermined time, and the operation mode is controlled to be switched based on the actual operation time.

Since the air purifier 1 of the fourth embodiment is configured as described above, as in the first embodiment, an appropriate air purifying operation is performed according to the usage environment conditions such as the degree of air pollution, and a comfortable air environment is performed. It is possible to provide. Further, since the improvement of air pollution is estimated by the operating time, it is possible to provide an inexpensive air purifier 1 that does not require the dust sensors 14 and 15. Even in the air purifier 1 equipped with the dust sensors 14 and 15, it is possible to select from remote control operation or the like whether to control the operation mode to be switched based on the amount of dirt component detected by the sensor or the operation time. You may do so.

Embodiment 5.
In the air purifier 1 of the first to fourth embodiments, the dust is targeted as a dirt component in the indoor air, and the electrostatic precipitator 8 and the HEPA filter 9 for the purpose of collecting dust are used as the air purifying means. The air purifier according to the fifth embodiment has a configuration in which an odor is targeted as a dirt component in the indoor air and a deodorizing filter or the like is used as an air purifying means. FIG. 14 is a cross-sectional configuration diagram of the air purifier according to the fifth embodiment of the present invention.

First, the configuration of the air purifier 100 according to the fifth embodiment will be described with reference to FIG. In FIG. 14, the air purifier 100 has a main body case 4 provided with an air supply port 2 for taking in indoor air and an exhaust port 3 for supplying air cleaned by air cleaning means into the room. The main body case 4 is provided with a ventilation passage 6 for connecting the air supply port 2 and the exhaust port 3, and a blower 5 including a fan 5a and a motor 5b arranged in the ventilation passage 6. Further, in the ventilation passage 6, an air purifying means for generating ozone for deodorizing the taken-in air on the downstream side of the fan 5a when viewed from the air supply port 2, and an ozone generator as a first air purifying means. 108 and a deodorizing filter 109 as a second air purifying means, which is an air purifying means for further deodorizing the air passing through the ozone generator 108, are arranged further downstream of the ozone generator 108. .. Further, the bypass air passage 7 that guides the air that has passed through the ozone generator 108 to the exhaust port 3 without passing through the deodorizing filter 109, and the air that has passed through the ozone generator 108 is passed through the deodorizing filter 109 side or the bypass air passage 7 side. A damper 10 is provided for switching whether or not the air is passed through. Further, it has a control unit 13 that controls the operation of the blower 5, the ozone generator 108, and the damper 10, and the remote controller 11 is connected to the control unit 13 via the communication line 12. The remote controller 11 is provided with an odor sensor 114 that detects the amount of odor components in the indoor air, and a button operation (start or stop of air cleaning operation, etc.) on the remote controller 11 and an odor of the indoor air detected by the odor sensor 114. An operation command based on the amount of components is transmitted to the control unit 13.

In FIG. 14, the solid arrow A indicates the flow of air discharged from the air supply port 2 through the ozone generator 108 and the deodorizing filter 109 by the blower 5, and is discharged from the exhaust port 3. The arrow B indicates the flow of air discharged from the exhaust port 3 through the bypass air passage 7 without passing through the deodorizing filter 109.

Ozone generator 108 applies the AC high voltage between across the dielectric such as glass electrodes, is changed to ozone (O ₃₎ by dissociating or excited oxygen between the electrodes. Since ozone is extremely unstable and highly reactive, it reacts with bacteria and odor-causing molecules, and ozone itself returns to oxygen and oxidatively decomposes bacteria and odor-causing molecules. That is, by operating the ozone generator 108 (applying an AC high voltage between the electrodes), sterilization and deodorization in the air can be performed.

The deodorizing filter 109 adsorbs and removes odor-causing molecules. Since the deodorizing filter 109 does not decompose the odor-causing molecules, the amount that can be adsorbed is limited, and if the adsorbed odor-causing molecules increase, the deodorizing filter 109 itself may generate a foul odor. Therefore, it is necessary to replace the deodorizing filter 109 on a regular basis.

Next, the operation of the air purifier 100 in the fifth embodiment will be described, but the operation is basically the same as that in the first embodiment. That is, the control unit 13 compares the amount of the odor component of the indoor air detected by the odor sensor 114 with the preset threshold value, and controls the ozone generator 108 (AC height to the electrode) based on the comparison result. The operation mode of the air purifier 100 is determined by the combination of the application of voltage (on and off) and the switching control of the damper 10. There are the following three operation modes, for example.
(1) Deodorization using ozone generator 108 and deodorization filter 109 (double deodorization operation)
(2) Deodorization using only the ozone generator 108 (ozone deodorization operation)
(3) Deodorization using only the deodorizing filter 109 (filter deodorizing operation)

Next, the characteristics of each operation mode are briefly shown.
(1) Double deodorizing operation The ozone generator 108 is operated (AC high voltage is applied between the electrodes) to generate ozone to deodorize, and the bypass air passage 7 is closed by the damper 10 to deodorize the filter 109. Deodorizes (ozone deodorizing function: effective, filter deodorizing function: effective). As a result, a very high deodorizing effect can be obtained. Further, by passing the air after ozone deodorization through the deodorizing filter 109, the amount of adsorbed odor molecules by the deodorizing filter 109 can be reduced, so that the replacement cycle of the deodorizing filter 109 can be lengthened.
(2) Ozone deodorizing operation The ozone generator 108 is operated (AC high voltage is applied between the electrodes) to generate ozone to deodorize, and the damper 10 opens the bypass air passage 7 to deodorize the air after ozone deodorization. Passes through the bypass air passage 7 side instead of the deodorizing filter 109 side (ozone deodorizing function: effective, filter deodorizing function: invalid). Therefore, the deodorizing filter 109 does not deodorize. As a result, the deodorizing effect is lower than that of the double deodorizing operation, but the adsorption of odor molecules to the deodorizing filter 109 can be suppressed, so that the replacement cycle of the deodorizing filter 109 can be lengthened.
(3) Filter deodorization operation Ozone generator 108 is stopped (AC high voltage is not applied between the electrodes) to prevent deodorization due to ozone generation, but ozone is generated by closing the bypass air passage 7 with the damper 10. The air that has passed through the vessel 108 is deodorized by the deodorizing filter 109 (ozone deodorizing function: invalid, filter deodorizing function: effective). As a result, although the deodorizing effect is inferior to that of the double deodorizing operation, the power consumption can be suppressed to a low level by stopping the ozone generator 108.

Since the air purifier 100 of the fifth embodiment is configured as described above, as in the first embodiment, an appropriate air purifying operation is performed according to the usage environment conditions such as the degree of air pollution, and a comfortable air environment is performed. It is possible to provide. Further, for the air cleaning means that needs to be replaced, such as the deodorizing filter 109, the replacement cycle can be lengthened by operating in an appropriate operation mode, so that the work and cost associated with the replacement can be reduced.

It is also possible to apply the configuration or control of the second to fourth embodiments to the configuration of the fifth embodiment. Further, although examples of dust collection are shown in the first to fourth embodiments and deodorization is shown in the fifth embodiment, these configurations are not limited to dust and odor, but are used for removing other chemical substances or PM2.5 and the like. It can also be applied to products equipped with various air purifying means used.

Embodiment 6.
In the air purifiers 1 and 100 according to the first to fifth embodiments, the operation mode is switched by controlling the power supply to the air purifying means and controlling the air passage to the air purifying means by the damper 10 and the bypass air passage 7. The configuration is such that appropriate air purification operation is performed. The air purifier 200 according to the sixth embodiment is configured to perform an appropriate air purifying operation without providing the damper 10 and the bypass air passage 7. FIG. 15 is a cross-sectional configuration diagram of the air purifier according to the sixth embodiment of the present invention.

First, the configuration of the air purifier 200 according to the sixth embodiment will be described with reference to FIG. In FIG. 15, the air purifier 200 has a main body case 4 provided with an air supply port 2 for taking in indoor air and an exhaust port 3 for supplying air cleaned by air cleaning means into the room. The main body case 4 is provided with a ventilation passage 6 for connecting the air supply port 2 and the exhaust port 3, and a blower 5 including a fan 5a and a motor 5b arranged in the ventilation passage 6. Further, in the ventilation passage 6, an electrostatic precipitator 8 that collects electrostatic dust from the air taken in downstream from the fan 5a when viewed from the air supply port 2, and an electrostatic precipitator 8 further downstream of the electrostatic precipitator 8. A HEPA filter 9 that collects dust from the air that has passed through the above is arranged. Further, it has a control unit 13 that controls the operation of the blower 5 and the electrostatic precipitator 8, and a remote controller 11 is connected to the control unit 13 via a communication line 12. The remote controller 11 is provided with a dust sensor 14 that detects the amount of dust in the room air, and is used for button operations (starting or stopping air cleaning operation, etc.) on the remote controller 11 and the amount of dust in the room air by the dust sensor 14. The operation command based on this is transmitted to the control unit 13.

Next, an example of the control operation of the sixth embodiment will be described. The control unit 13 of the air purifier 200 controls the power supply of the electrostatic precipitator 8 (on / off of applying a high voltage to the electrodes) based on the amount of dust in the indoor air detected by the dust sensor 14. The operation mode of 1 is determined. There are two operation modes, for example, as shown below.
(1) Dust collection using an electrostatic precipitator 8 and a HEPA filter 9 (double dust collection operation)
(2) Dust collection using only the HEPA filter 9 (HEPA dust collection operation)

As described above, in the double dust collection operation, a very high dust collection rate can be obtained, the amount of dust collected by the HEPA filter 9 is reduced, and the effect of prolonging the replacement cycle of the HEPA filter 9 can be obtained. Further, in the HEPA dust collection operation, although the dust collection rate is slightly inferior to that in the double dust collection operation, almost the same high dust collection rate can be obtained, and since electric dust collection is not performed, power consumption can be reduced.

Since the air purifier 200 of the sixth embodiment is configured as described above, as in the first embodiment, an appropriate air purifying operation is performed according to the usage environment conditions such as the degree of air pollution, and a comfortable air environment is performed. It is possible to provide. Further, for an air purifying means such as a HEPA filter 9 that needs to be replaced, the replacement cycle can be lengthened by operating in an appropriate operation mode, so that the work and cost associated with the replacement can be reduced.

As a modification of the sixth embodiment, a configuration in which the dust sensor 14 is not provided is also possible. That is, the air purifier 200 shall always operate the electrostatic precipitator 8 (apply a high voltage between the electrodes) during the air purifying operation. As a result, the air taken in from the air supply port 2 is collected by the electrostatic precipitator 8 and then by the HEPA filter 9. That is, the double dust collection operation is always performed during the air cleaning operation. Since the double dust collection operation is performed, a very high dust collection rate can be obtained, the amount of dust collected by the HEPA filter 9 can be reduced, and the replacement cycle of the HEPA filter 9 can be lengthened. That is, it is possible to provide a comfortable air environment by air cleaning operation with a high dust collection rate, and it is possible to reduce maintenance work.

The function of the control unit 13 in the air purifiers 1, 100, 200 of the first to sixth embodiments is realized by the processing circuit. The air purifiers 1, 100, and 200 include a processing circuit for controlling the operation of the blower means. The processing circuit may be dedicated hardware or a processor that executes a program stored in memory.

FIG. 16 is a configuration diagram of the control unit 13 when the function of the control unit 13 in the air purifiers 1, 100, 200 of the first to sixth embodiments is realized by dedicated hardware. The processing circuit 31, which is dedicated hardware, is a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or these. It is a combination.

FIG. 17 is a configuration diagram of the control unit 13 when the function of the control unit 13 in the air purifiers 1, 100, 200 of the first to sixth embodiments is realized by a processor that executes a program stored in the memory. be. The processor 32 is a CPU (Central Processing Unit), a processing device, an arithmetic unit, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor). The function of the control unit 13 is realized by the processor 32 and software, firmware, or a combination of software and firmware. The software or firmware is described as a program and stored in the memory 33. The memory 33 is non-volatile or volatile such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EEPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory). Built-in memory such as semiconductor memory.

A part of the function of the control unit 13 may be realized by dedicated hardware, and the other part of the function of the control unit 13 may be realized by software or firmware. As described above, the function of the control unit 13 can be realized by hardware, software, firmware, or a combination thereof.

The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1,100,200 Air purifier, 2 Air supply port, 3 Exhaust port, 4 Main body case, 5 Blower, 5a fan, 5b motor, 6 Ventilation passage, 7 Bypass air passage, 8 Electrostatic precipitator, 9 HEPA filter, 10 damper , 11 remote control, 12 communication lines, 13 control unit, 14 dust sensor, 31 processing circuit, 32 processor, 33 memory, 108 ozone generator, 109 deodorizing filter, 114 odor sensor.

Claims (5)

A main body case having an air supply port, an exhaust port, and a ventilation path communicating the air supply port and the exhaust port.
An air blowing means provided in the main body case, which takes in indoor air from the air supply port and discharges it from the exhaust port.
A plurality of air purifying means provided in the ventilation passage and purifying the indoor air taken in from the air supply port, the first air purifying means that does not need to be replaced and the first air purifying means that are cleaner than the first air purifying means. A plurality of air purifying means, including a second air purifying means that has high performance and needs to be replaced .
It is provided with a control means for controlling the operation of the blower means and enabling or disabling the functions of the plurality of air purifying means based on the amount of air pollution components in the room.
The control means
It has a first threshold value on the side where the amount of dirt components is low and a second threshold value on the side where the amount of dirt components is high.
When the amount of the air pollution component is less than the first threshold value, the function of the first air cleaning means among the plurality of air cleaning means is invalidated, and the function of the second air cleaning means is enabled. Control to
Wherein the amount of air polluting components more than the first threshold value, if less than the second threshold value, the first air cleaning means and said second air cleaning unit of the plurality of air cleaning means Control to enable the function,
When the amount of the air pollution component is larger than the second threshold value, the function of the first air cleaning means among the plurality of air cleaning means is enabled, and the function of the second air cleaning means is invalidated. An air purifier characterized by the control of the air purifier. The control means
The time during which the first air cleaning means and the second function is effective and fewer than the said air contamination often the second threshold than the amount said first threshold value of the components of air cleaning means is set in advance The air purifier according to claim 1, wherein the function of the second air purifying means is invalidated when the function of the second air purifying means is continued. The air purifier according to claim 1 or 2, wherein the air pollution component is dust. The air purifier according to claim 1 or 2, wherein the air pollution component is an odor. In the main body case, a bypass air passage provided in parallel with a section in the air passage in which at least one of the plurality of air cleaning means is installed is further provided.
The air purifier according to any one of claims 1 to 4, wherein the function of at least one air purifying means is invalidated by passing the indoor air through the bypass air passage side.

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