JP2006271614A - Air cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To speedily and equally release ions into air without increasing noise when air in a room is cleaned. <P>SOLUTION: Inside of a main body 1, a filter 7, an ion generator 8 and a blowing means 9 are provided. As suction ports 5 of the main body 1, a plurality of suction ports (a first suction port 5a and a second suction port 5b) are provided. The filter 7 is provided inside of the main body 1 so that only air sucked through the first suction port 5a may pass through the filter. At the second suction port 5b being the other suction port, a stop valve 10 for opening and closing the second suction port 5b is provided. Then, a control means (a control part 12, a stop valve driving part 13) for controlling the opening and closing operation of the stop valve 10 based on an external signal (such as an input signal from an input part) is provided. The control means makes the driving ability of a blowing means 9 lower than that in the state of closing the stop valve 10 when making the stop valve 10 into an opened state based on the external signal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air purifier including a filter (for example, a dust collection filter and a deodorizing filter) for cleaning air and an ion generator.

Conventionally, various air purifiers for purifying air, that is, removing dust and odor components contained in the air, have been proposed. For example, Patent Literature 1 discloses an air purification device in which a dust collection filter is disposed on the windward side inside the main body, while an ion generator and a deodorizing filter are disposed on the leeward side. When the air sucked from the suction port passes through the dust collection filter and the deodorizing filter, the air is purified. In addition, due to generation of radicals, ozone, and the like accompanying corona discharge between the discharge electrode and the counter electrode of the ion generator, odor components in the air are oxidized and removed to some extent.
JP 2002-59027 A

  By the way, in the initial operation of the air purifier, in order to quickly clean the air in the room, usually, the rotational speed of the internal motor and fan is increased to increase the intake air flow and the blow air flow. If the air purifier is kept in operation, the indoor air is eventually cleaned, and the purpose of cleaning is almost achieved. Therefore, if the air cleaner continues to operate at a certain capacity after the air is almost cleaned, it will increase wasteful power consumption and maintain a high noise level due to the high motor speed. Will be.

  Therefore, in recent air purifiers, dirt in the indoor air is sensed, and when the air is cleaned, control is performed to reduce the rotation speed of the motor.

  However, under such control, when the rotational speed of the motor is reduced, the noise is reduced, but the amount of air passing through the vicinity of the ion generator is reduced. For this reason, in the state where the indoor air is purified, the ions cannot be quickly and uniformly scattered in the room by being put on the flow of the blown-out air. On the other hand, increasing the rotation speed of the motor to increase the blown air volume in order to disperse the ions quickly and uniformly in the room causes an increase in noise as described above.

  The present invention has been made to solve the above problems, and its purpose is to quickly and uniformly introduce ions into the air without increasing noise when the indoor air is cleaned. The object is to provide an air purifier that can be discharged.

  The air cleaner of the present invention includes a filter (for example, a dust collection filter and a deodorizing filter) for purifying air sucked from the outside, an ion generator for generating ions, and the air sucked from the outside for the ion generator. And an air cleaner provided inside the main body with air blowing means for discharging to the outside through the air body, the main body is provided with a plurality of air inlets, , Which is referred to as the first suction port) is provided inside the main body so that only the air sucked from the suction port passes through, and the other suction port (hereinafter referred to as the second suction port) is connected to the suction port. An on-off valve that opens and closes is provided, and includes control means for controlling the opening and closing operation of the on-off valve based on an external signal. In addition, said other suction inlet points out another suction inlet from the suction inlet which the air which passes a filter passes.

  According to said structure, the several suction inlet is provided in the main body. By driving the air blowing means, the air sucked from each suction port is released to the outside together with the ions generated by the ion generator. At this time, only the air sucked from the first suction port is purified by passing through the filter inside the main body.

  On the other hand, an opening / closing valve is provided at the second suction port, and the opening / closing operation of the opening / closing valve opens and closes the second suction port. The opening / closing operation of the opening / closing valve is controlled by the control means based on an external signal. As an external signal at this time, for example, an input signal from an input means (for example, an operation unit or a remote controller provided in the main body) or a detection signal from a dirt detection means (for example, a dirt sensor) can be assumed.

  As described above, since the opening / closing operation of the opening / closing valve is controlled based on the external signal, for example, when the indoor air is cleaned, the opening of the opening / closing valve opens the second suction port. On the other hand, when the indoor air is dirty, the second suction port can be closed by closing the on-off valve.

  Here, if the second suction port is in an open state, the path of the air that flows through the inside of the main body by driving the blowing means is a path that flows through the first suction port and the filter (hereinafter referred to as the first path). And a path flowing through the second suction port (hereinafter referred to as a second path). At this time, the filter that becomes the air path resistance exists in the first path, while the member that becomes the air path resistance does not exist in the second path.

  Therefore, when the second suction port is opened, air is taken into the main body mainly through the second suction port by driving the air blowing means, and the air is released to the outside through the ion generator. can do. Thereby, even if it reduces the drive capability (for example, rotation speed of a motor or a fan) of a ventilation means compared with the case where air is sucked in through a filter only from the 1st suction port without providing the 2nd suction port, A constant blowing air volume can be obtained. In other words, ions generated by the ion generator can be released to the outside at a constant speed even if the driving capability of the blowing means is reduced. As a result, when indoor air is cleaned, ions can be quickly and uniformly released into the air without increasing the noise of the blowing means.

  The air cleaner according to the present invention further includes input means for inputting an instruction to open / close the opening / closing valve, and the control means opens / closes the opening / closing valve based on an input signal from the input means. It may be. Here, as the input means, as described above, an operation unit provided in the main body, a remote controller, or the like can be assumed.

  In this configuration, for example, when the user inputs an instruction to open the opening / closing valve in the input means, the control means receives the input signal to open the opening / closing valve and open the second suction port. On the other hand, when the user inputs an instruction to close the on-off valve in the input means, the control means receives the input signal to close the on-off valve and close the second suction port. Thus, the user can freely switch the open / close state of the second suction port according to the user's intention by operating the input means.

  The air blowing means includes a fan and a motor that rotates the fan, and the control means opens the open / close valve based on an input signal from the input means. You may perform control which makes the rotation speed of a motor lower than the rotation speed at the time of the said on-off valve closed state.

  In the closed state of the on-off valve, that is, the closed state of the second suction port, air is sucked into the main body only from the first suction port, and the air passes through the filter. Since the filter has an air path resistance, it is necessary to increase the rotation speed of the motor of the blower means in order to obtain a constant blown air volume. On the other hand, in the open state of the on-off valve, that is, the open state of the second suction port, a path (second route) through which air sucked from the second suction port flows inside the main body is like a filter. Since there is no member that becomes an air path resistance, air is mainly sucked into the main body from the second suction port rather than the first suction port. In addition, since there is no member that becomes air path resistance in the second path, it is not necessary to rotate the motor as in the closed state of the on-off valve when obtaining a constant blown air volume.

  Therefore, when the control means opens the on-off valve based on the input signal from the input means, a constant blown air volume is maintained by lowering the motor speed than when the on-off valve is closed. However, in other words, the power consumption can be reduced and the noise of the blowing means can be reduced while keeping the amount of ions released to the outside per unit time constant.

  The air cleaner of the present invention further includes a dirt detection means for detecting whether or not the external air is clean, and the control means opens and closes the on-off valve based on a detection signal from the dirt detection means. The structure to be made may be sufficient.

  In this configuration, the on / off valve is opened / closed based on the detection signal from the dirt detection means under the control of the control means, so that even if the user does not operate the input means, it is automatically set according to the degree of dirt in the external air. The opening / closing state of the second suction port can be switched.

  In particular, the control means opens the on-off valve when receiving a detection signal that the external air is clean from the dirt detection means, while the detection signal indicates that the external air is dirty. It is desirable to close the on-off valve when receiving from the detecting means.

  In this case, when the dirt detection means detects that the external air is clean, a detection signal to that effect is input to the control means, and the on / off valve is opened by the control of the control means. The suction port is opened. On the other hand, when the dirt detection means detects that the external air is dirty, a detection signal to that effect is input to the control means, and the control valve controls the open / close valve to close. Mouth is closed. Therefore, the open / close state of the second suction port can be switched reliably according to the degree of contamination of the external air.

  The air blowing means includes a fan and a motor that rotates the fan, and the control means opens the on-off valve based on a detection signal from the dirt detection means. The number of rotations of the motor may be lower than the number of rotations when the on-off valve is closed.

  In the open state of the on-off valve, there is no member that becomes a wind path resistance like the filter in the second path, and when obtaining a constant blown air volume, the motor does not rotate as much as in the closed state of the on-off valve. As described above, the process is completed.

  Therefore, even when the control means opens the on-off valve based on the detection signal from the dirt detection means, the motor speed is reduced compared to when the on-off valve is closed, so that a constant amount of blown air can be obtained. Power consumption and noise of the air blowing means can be reduced while maintaining (with constant ion release amount per unit time).

  The air cleaner according to the present invention may further include an instruction unit for turning on / off the operation of the control unit based on a detection signal from the dirt detection unit. In this case, if the user turns on the operation of the control means based on the detection signal from the dirt detection means by operating the instruction means, the above-described operation is performed, while if the operation of the control means is turned off, the input means Only the operation based on the input signal from can be executed by the control means. That is, the automatic operation of the apparatus based on the detection signal from the dirt detection means and the manual operation based on the input signal from the input means can be freely switched according to the user's intention, improving usability.

  In the air cleaner of the present invention, the air blowing unit includes a fan and a motor that rotates the fan, and further includes an open / closed state detecting unit that detects an open / closed state of the open / close valve, and the control. The means may be configured to reduce the rotational speed of the motor below the rotational speed when the open / close valve is closed when the open / close state detection means detects the open state of the open / close valve.

  In the open state of the on-off valve, there is no member that becomes a wind path resistance like the filter in the second path, and when obtaining a constant blown air volume, the motor does not rotate as much as in the closed state of the on-off valve. As described above, the process is completed.

  Therefore, when the opening / closing state of the opening / closing valve is detected by the opening / closing state detection means, the control means reduces the rotation speed of the motor more than when the opening / closing valve is closed, thereby maintaining a constant blowing air volume ( The power consumption and the noise of the air blowing means can be reduced while keeping the amount of ion emission to the outside per unit time constant.

  According to the present invention, the second suction port is provided with an opening / closing valve, and the opening / closing operation of the opening / closing valve is controlled by the control means. Therefore, the opening / closing valve is opened and the second suction port is opened. Sometimes, by driving the air blowing means, air can be taken into the main body mainly through the second suction port, and the air can be discharged to the outside through the ion generator. This makes it possible to obtain a constant amount of blown air even if the drive capacity of the blowing means is reduced compared to the case where air is sucked in through the filter only from the first suction port without providing the second suction port. The ions generated by the ion generator can be discharged to the outside at a constant speed. As a result, even when indoor air is cleaned, ions can be quickly and uniformly released into the air without increasing the noise of the blower.

[Embodiment 1]
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing a schematic configuration of the air cleaner according to the present embodiment, and is a cross-sectional view of the air cleaner as viewed from the side. The air cleaner has a main body 1.

  The inside of the main body 1 is partitioned back and forth by a partition plate 2. As a result, a first compartment 3 is formed in front of the main body 1 (upward from the partition plate 2), and a second compartment 4 is formed in the rear (downward from the partition plate 2). ing. The first compartment 3 and the second compartment 4 communicate with each other through a single or a plurality of openings 2 a provided in the partition plate 2. In addition, a suction port 5 for air from the outside is provided in front of the main body 1, and a blower outlet 6 for discharging the sucked air to the outside is provided on the rear upper surface of the main body 1.

  The suction port 5 is composed of a plurality of suction ports. In the present embodiment, the suction port 5 is constituted by a first suction port 5 a and a second suction port 5 b, which are arranged vertically in front of the main body 1.

  In the main body 1, a filter 7, an ion generator 8, an air blowing means 9, and an on-off valve 10 are provided.

  The filter 7 cleans the air sucked from outside and is provided in the first compartment 3. The filter 7 includes a dust collection filter 7a and a deodorizing filter 7b. The dust collection filter 7a is for removing dust contained in the air, and the deodorization filter 7b is for removing odor components in the air.

  The filter 7 is provided inside the main body 1 so that only air sucked from one of the suction ports passes. In particular, in this embodiment, only air sucked from the first suction port 5a is provided. It is provided just behind (the leeward side) of the first suction port 5a so as to pass through. That is, the filter 7 is not disposed behind the second suction port 5b. Thereby, as a path | route of the air suck | inhaled into the inside of the main body 1, the path | route (henceforth the 1st path | route A) inhaled from the 1st inlet 5a and passing the filter 7, and the 2nd inlet 5b And a path that does not pass through the filter 7 (hereinafter referred to as a second path B (see FIG. 3)) can be realized.

  The ion generator 8 includes a discharge electrode and an induction electrode that are arranged to face each other via a dielectric, and generates ions by discharging between these two electrodes. 6 is provided in the vicinity. The ion generator 8 can generate at least one of positive and negative ions. If positive and negative ions are generated from the ion generator 8, airborne bacteria in the air can be inactivated by these ions, and harmful substances in the air can be removed. The inactivation mentioned above refers to sterilization, sterilization, sterilization action against airborne bacteria in the air, and action of decomposition / removal of viruses. Moreover, if only the negative ions are generated from the ion generator 8, the human can be mentally relaxed by the negative ions.

  The air blowing means 9 discharges the air sucked from the outside to the outside through the ion generator 8, and has a fan 9a and a motor 9b for rotating the fan 9a. The fan 9 a is provided in the second compartment 4, and the motor 9 b is provided across the first compartment 3 and the second compartment 4.

  The on-off valve 10 is provided immediately behind the second suction port 5b, and opens and closes the second suction port 5b by its own opening / closing operation. The opening / closing operation of the opening / closing valve 10 is controlled by a control means described later.

Next, the structure of the principal part of the air cleaner of this embodiment is demonstrated.
FIG. 2 is a block diagram showing a schematic configuration of a main part of the air cleaner of the present embodiment. This air purifier includes an input unit 11, a control unit 12, and an on-off valve drive unit 13 in addition to the configuration shown in FIG.

  The input unit 11 is an input means for a user to input an instruction to open / close the opening / closing valve 10. The input unit 11 includes an operation unit 11 a provided on the outer surface of the main body 1 and a remote controller 11 b that can communicate with the main body 1. Information input by the input unit 11 (information on the opening operation instruction and the closing operation instruction of the on-off valve 10) is input to the control unit 12.

  The control unit 12 controls the operation of each unit of the main body 1. In this embodiment, the control unit 12 controls the rotation speed of the motor 9 b and the driving of the on-off valve driving unit 13. The on-off valve drive unit 13 is a drive mechanism for opening and closing the on-off valve 10. In the present embodiment, the control unit 12 and the opening / closing valve driving unit 13 constitute a control unit that controls the opening / closing operation of the opening / closing valve 10 based on an external signal. Here, as the external signal, an input signal from the input unit 11 can be considered in the present embodiment.

Next, operation | movement of the air cleaner of this embodiment is demonstrated.
First, when the user determines to remove indoor air dirt (dust, odor components), the user inputs an instruction to close the on-off valve 10 at the input unit 11. Then, the on-off valve drive unit 13 closes the on-off valve 10 under the control of the control unit 12. As a result, the second suction port 5b is in a closed state. Therefore, when the motor 9b and the fan 9a are rotated, as shown in FIG. 1, air enters the main body 1 only from the first suction port 5a. Inhaled. And when the said air passes the filter 7, while the dust in air is removed by the dust collection filter 7a, the odor component in air is removed by the deodorizing filter 7b.

  It is assumed that the rotational speed of the motor 9b when a constant amount of blown air is obtained when the on-off valve 10 is closed is P, and the motor 9b is rotated at this rotational speed P when the on-off valve 10 is closed.

  The air purified by passing through the filter 7 follows the first path A through the opening 2a of the partition plate 2 by the rotation of the motor 9b and the fan 9a, and passes through the vicinity of the ion generator 8. Then, it is discharged to the outside from the air outlet 6. In the ion generator 8, for example, positive and negative ions are generated, so that the air cleaned by the filter 7 is discharged to the outside in a state including these ions.

  When the air purifier is operated for a certain period of time, the indoor air is eventually cleaned. Therefore, when the user wants to keep only the discharge of ions into the room while keeping the amount of air blown from the outlet 6 constant, the user instructs the input unit 11 to open the on-off valve 10. Then, the control valve 12 controls the on-off valve drive unit 13 to open the on-off valve 10 as shown in FIG. Thereby, the 2nd suction inlet 5b will be in an open state.

  Here, since there is no filter 7 serving as an air path resistance behind the second suction port 5b, when the motor 9b and the fan 9a are rotated, the main body 1 has a main part as shown in FIG. Air is sucked into the second suction port 5b. The air follows the second path B, passes through the opening 2 a of the partition plate 2, passes through the vicinity of the ion generator 8, and is discharged to the outside from the air outlet 6.

  In addition, since the second path B does not include a member having an air path resistance like the filter 7, the rotation speed of the motor 9b and the fan 9a is set to be higher than the rotation speed P when the second suction port 5b is opened. Even when the rotational speed is lowered to a low number of revolutions Q, it is possible to obtain a blown air volume equivalent to that when air is sucked through the filter 7 only from the first suction port 5a. Therefore, in the present embodiment, when the second suction port 5b is in the open state, the control unit 12 controls the on-off valve drive unit 13 to change the rotation speed of the motor 9b to the rotation when the on-off valve 10 is in the closed state. The rotational speed Q is lowered to a number lower than the number P, and the same blown air volume as when the on-off valve 10 is closed is maintained.

  As mentioned above, in the air cleaner of this embodiment, the suction inlet 5 is comprised by the several inlet (the 1st inlet 5a and the 2nd inlet 5b), and the filter 7 does not exist in the lee. The suction port (second suction port 5b) is provided with an opening / closing valve 10 for opening and closing the suction port, and control means for opening / closing the opening / closing valve 10 based on an input signal from the input unit 12 is provided. It has been. Since the path through which the air sucked from the second suction port 5b flows (second path B) does not have a member that becomes an air path resistance like the filter 7, as described above, the driving capability of the blowing means 9 Even if the pressure is lowered, it is possible to maintain the same blown air volume as when only the first suction port 5a is provided.

  Here, the release rate of the ions generated in the ion generator 8 into the air depends on the amount of air blown from the outlet 6 (the amount of air passing through the vicinity of the ion generator 8), and the amount of blown air is constant. If so, the release rate of ions into the air is also constant. In the present embodiment, since the amount of air blown from the outlet 6 can be made constant even when the driving capability of the air blowing means 9 is reduced in the open state of the second suction port 5b, the ion generator 8 The release rate of the generated ions into the air can be kept constant.

  Therefore, according to the configuration of the present embodiment, even when the indoor air is cleaned, the driving capability of the blowing unit 9 can be reduced without impairing the effect of releasing ions quickly and uniformly into the air. The noise of the apparatus can be reduced accordingly. Moreover, since the driving capability of the air blowing means 9 can be lowered in the open state of the second suction port 5b, the power consumption of the apparatus can also be reduced.

  Moreover, in this embodiment, since a control means opens and closes the on-off valve 10 based on the input signal from the input part 11, a user operates the input part 11, and the open / close state of the 2nd inlet 5b is changed. It is possible to switch freely according to the intention of the user.

  In the present embodiment, the first suction port 5a and the second suction port 5b are provided on the same surface of the main body 1 (in this embodiment, the front surface of the main body 1), but are provided on different surfaces. May be. For example, the first suction port 5 a may be provided on the front surface of the main body 1, while the second suction port 5 b may be provided on the side surface of the main body 1. In this case, since the distance between the second suction port 5b and the air blowing means 9 can be made shorter than the distance between the first suction port 5a and the air blowing means 9, the air is sucked from the second suction port 5b. Air can be efficiently sent to the blowing means 9. As a result, the effects of the present embodiment described above can be easily obtained. In particular, if the second suction port 5b is provided on the side surface of the main body 1 at a position in front of the partition plate 2 and in the rear of the filter 7, such an effect can be reliably obtained.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to the drawings. In addition, the same member number is attached to the same structure as Embodiment 1, and the description is abbreviate | omitted.

  FIG. 4 is a block diagram showing a schematic configuration of a main part of the air cleaner according to the present embodiment. In addition to the configuration of the first embodiment, the air cleaner of the present embodiment further includes an open / close detection unit 14. The open / close detection unit 14 is an open / closed state detection unit that detects the open / closed state of the open / close valve 10. Information detected by the open / close detection unit 14, that is, information that the open / close valve 10 is open or closed is input to the control unit 12.

  In the present embodiment, when an instruction to open the on-off valve 10 is input from the input unit 11, the control means controls the on-off valve 10 based on the input signal from the input unit 11 as in the first embodiment. Open. At this time, the control means (especially the control unit 12) determines the rotational speed of the motor 9b when the open / close detection unit 14 detects the open state of the open / close valve 10, and the rotational speed P when the open / close valve 10 is closed. To a lower rotational speed Q.

  In the open state of the on-off valve 10, there is no member that becomes an air path resistance like the filter 7 in the second path B, and the motor 9 b is operated as the on-off valve 10 is in the closed state when obtaining a constant amount of blown air. As described in the first embodiment, it is not necessary to rotate. Therefore, when the opening / closing detection unit 14 detects that the opening / closing valve 10 is actually open, the control unit 12 can reduce the rotational speed of the motor 9b as compared with when the opening / closing valve 10 is closed. Thus, as in the first embodiment, it is possible to reduce the power consumption and the noise of the blowing means 9 while maintaining a constant blown air volume, that is, keeping the amount of ion emission to the outside per unit time constant. .

[Embodiment 3]
The following will describe still another embodiment of the present invention with reference to the drawings. In addition, the same member number is attached to the same structure as Embodiment 1 or 2, and the description is abbreviate | omitted.

  FIG. 5 is a cross-sectional view showing a schematic configuration of the air cleaner according to the present embodiment, and is a cross-sectional view of the air cleaner as viewed from the side. FIG. 6 is a block diagram showing a schematic configuration of a main part of the air cleaner according to the present embodiment. As shown in these drawings, the air cleaner of the present embodiment further includes a dirt sensor 15 in addition to the configuration of the second embodiment.

  The dirt sensor 15 is dirt detecting means for detecting whether or not the external air is clean, and is provided above the first compartment 3 of the main body 1. When the dirt sensor 15 determines that the outside air is clean or the outside air is dirty, a detection signal to that effect is output to the control unit 12 (see FIG. 6).

  In the present embodiment, the input unit 11 also functions as an instruction unit for turning on / off the operation of the control unit based on the detection signal from the dirt sensor 15. Information input by the input unit 11 (information on an opening operation instruction of the on-off valve 10, a closing operation instruction, and an ON / OFF operation instruction of the control means) is input to the control unit 12.

  Also in the present embodiment, the control means controls the opening / closing operation of the opening / closing valve 10 based on the external signal. However, in this embodiment, since the air cleaner further includes the dirt sensor 15, as the external signal, for example, an input signal from the input unit 11 or a detection signal from the dirt sensor 15 is considered. be able to.

  In the air cleaner of the present embodiment, the operation of the air purifier when the operation of the control unit based on the detection signal from the dirt sensor 15 is turned off by the instruction input from the input unit 11 is described in the first embodiment. It is the same. On the other hand, when the operation of the control means based on the detection signal from the dirt sensor 15 is turned ON by an instruction input from the input unit 11, the control means opens and closes the on-off valve 10 based on the detection signal from the dirt sensor 15. Let

  More specifically, when receiving a detection signal from the dirt sensor 15 that the outside air is dirty, the control means closes the on-off valve 10 and rotates the motor 9b at the rotation speed P. On the other hand, when the control means receives a detection signal from the dirt sensor 15 that the external air is clean, it opens the on-off valve 10 and sets the rotational speed of the motor 9b to a rotational speed Q lower than the rotational speed P. To lower.

  As described above, in the present embodiment, since the on-off valve 10 is opened and closed based on the detection signal from the dirt sensor 15 under the control of the control means, the external air is not required to be operated by the user. The open / close state of the second suction port 5b can be automatically switched according to the degree of dirt.

  Further, when the on-off valve 10 is in the open state, there is no air path resistance member such as the filter 7 in the second path B. Therefore, when obtaining a constant amount of blown air, the on-off valve 10 is in the closed state. As described in the first embodiment, it is not necessary to rotate the motor 9b. Therefore, even when the control means opens the on-off valve 10 based on the detection signal from the dirt sensor 15, the rotation speed of the motor 9b is lower than the rotation speed P when the on-off valve 10 is closed. By reducing it to several Q, it is possible to reduce the power consumption and the noise of the blowing means 9 while maintaining a constant blown air volume, that is, keeping the amount of ions released to the outside per unit time constant.

  In the present embodiment, the input unit 11 also functions as an instruction unit for turning on / off the operation of the control unit based on the detection signal from the dirt sensor 15, so the input unit 11 is used as the instruction unit. For example, automatic operation of the apparatus based on the detection signal from the dirt sensor 15 and manual operation based on the input signal from the input unit 11 can be freely switched according to the intention of the user.

  Of course, it is possible to configure the air cleaner by appropriately combining the configurations of the embodiments described above.

It is sectional drawing which shows the schematic structure of the air cleaner which concerns on one Embodiment of this invention. It is a block diagram which shows the schematic structure of the principal part of the said air cleaner. It is sectional drawing which shows the structure of the outline of the said air cleaner when an on-off valve is made into an open state. It is a block diagram which shows the structure of the outline of the principal part of the air cleaner which concerns on other embodiment of this invention. It is a block diagram which shows the structure of the outline of the principal part of the air cleaner which concerns on other embodiment of this invention. It is a block diagram which shows the schematic structure of the principal part of the said air cleaner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 5 Suction port 5a 1st suction port 5b 2nd suction port 7 Filter 7a Filter 7b Filter 8 Ion generator 9 Blower means 9a Fan (blower means)
9b Motor (air blowing means)
10 On-off valve 11 Input section (input means, instruction means)
11a Operation unit (input means, instruction means)
11b Remote control (input means, instruction means)
12 Control unit (control means)
13 On-off valve drive unit (control means)
14 Opening / closing detection unit (opening / closing state detection means)
15 Dirt sensor (dirt detection means)

Claims (8)

A filter to clean the air sucked in from the outside,
An ion generator for generating ions;
An air purifier provided inside the main body with air blowing means for releasing air sucked from outside through the ion generator to the outside,
The main body is provided with a plurality of air inlets,
The filter is provided inside the main body so that only the air sucked from one of the suction ports passes,
The other suction port is provided with an on-off valve that opens and closes the suction port,
An air cleaner comprising control means for controlling the opening / closing operation of the on-off valve based on an external signal. An input means for inputting an instruction to open and close the on-off valve;
The air cleaner according to claim 1, wherein the control means opens and closes the on-off valve based on an input signal from the input means. The air blowing means includes a fan and a motor that rotates the fan,
The control means reduces the rotational speed of the motor below the rotational speed when the open / close valve is closed when the open / close valve is opened based on an input signal from the input means. The air cleaner according to claim 2. It further comprises a dirt detecting means for detecting whether or not the external air is clean,
The air cleaner according to claim 2, wherein the control means opens and closes the on-off valve based on a detection signal from the dirt detection means.   The control means opens the on-off valve when receiving a detection signal that the external air is clean from the dirt detection means, and sends a detection signal that the external air is dirty to the dirt detection means. The air cleaner according to claim 4, wherein the on-off valve is closed when received from the air. The air blowing means includes a fan and a motor that rotates the fan,
When the on-off valve is opened based on the detection signal from the dirt detection means, the control means reduces the rotational speed of the motor below the rotational speed when the on-off valve is closed. The air cleaner according to claim 4 or 5, characterized by the above.   The air cleaner according to any one of claims 4 to 6, further comprising instruction means for turning on / off the operation of the control means based on a detection signal from the dirt detection means. The air blowing means includes a fan and a motor that rotates the fan,
An opening / closing state detecting means for detecting an opening / closing state of the opening / closing valve;
The control means reduces the rotational speed of the motor below the rotational speed when the open / close valve is closed when the open / close state detection means detects the open state of the open / close valve. The air cleaner according to claim 1, 2, 4 or 5.

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