JP2014055681A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner capable of detecting an abnormal state of a louver with better accuracy and, when the abnormal state is released, returning the louver to a predetermined angle automatically, by detecting a voltage induced in a stepping motor in addition to the change in the rotation number of a fan motor.SOLUTION: When a voltage detected by voltage detection means 13 becomes higher than a preset voltage threshold value, and when the time calculated by first time calculation means 14 becomes less than a preset first time threshold value, a louver is determined to be abnormal by abnormality determination means 15. When the time calculated by second time calculation means 16 becomes less than a second time threshold value, first state determination means 17 determines that the abnormality has been released, and the louver is returned to a predetermined angle automatically, and when it becomes more than the second time threshold value, it is determined that the abnormal state continues, and the abnormal state is reported to a user.

Description

  The present invention relates to an air purifier used in a general home or office.

  Conventionally, this type of air purifier can easily remove the front panel, filter, etc., so when the user removes the front panel, filter, or the pressure loss inside the product due to filter clogging etc. It was necessary to distinguish and distinguish changes in pressure loss due to louver failures and abnormalities.

  Therefore, we paid attention to the technology of bathroom air conditioners with similar louvers.

  In a bathroom air conditioner, the circulation fan is rotated by driving a motor to suck in the bathroom air from the air inlet, and the air is exhausted into the bathroom from the outlet and the ventilation fan exhausts the bathroom air. An air outlet is formed by an exhaust air passage exhausting from the opening to the outside, a heating means disposed in the circulation air passage, a temperature detection means for detecting the temperature of the circulation air passage, and a drive means disposed in the air outlet. A louver that opens and closes and a control unit that controls the circulation fan, the ventilation fan, the heating means, and the louver were provided. As a technique for detecting a failure in the circulation air passage, the control unit performs a constant rotation speed control of the circulation motor, and calculates a pressure loss of the circulation air passage based on an input voltage corresponding to driving at a predetermined rotation speed. By estimating and detecting the failure of the driving means of the louver according to the pressure loss and the output of the temperature detecting means, the louver failure can be detected by an inexpensive method (for example, Patent Document 1). ).

JP 2004-294040 A

  In the conventional method as described above, the failure of the louver is detected only by the change in the rotation speed of the fan motor. Therefore, when the front panel, filter, etc. are removed, the pressure loss inside the product is reduced. The rotation speed of the fan motor changes in a decreasing direction, and in the case of clogged filters, the rotation speed of the fan motor changes in an increasing direction due to an increase in pressure loss inside the product.

  In addition, when the louver that operates to open the air outlet in the normal product operation state breaks down or becomes abnormal, the air outlet remains closed, as in the case of filter clogging, etc. As the pressure loss increases, the rotation speed of the fan motor changes in an increasing direction.

  That is, the problem that the difference between the change in pressure loss due to filter clogging or the like and the change in pressure loss due to louver failure or abnormality cannot be distinguished cannot be overcome.

  Therefore, the present invention solves the above-mentioned problem, and detects the voltage induced in the stepping motor for driving the louver in addition to the change in the rotational speed of the fan motor, thereby accurately detecting the abnormal state of the louver. The object is to automatically return the louver to a predetermined angle when it is well detected and the abnormal state is released.

In order to achieve this object, the present invention provides a fan motor that drives a fan that blows air, a rotational speed detection means that detects the rotational speed of the fan motor, and the rotational speed of the fan motor according to the operation mode in advance. Rotation speed control means for controlling so as to be set to a predetermined rotation speed, louvers as wind direction control means for controlling the wind direction of the air blown into the room, a stepping motor for driving the louver, and a louver A drive control means for controlling the stepping motor so as to have an angle; a voltage detection means for detecting a voltage induced in the winding when the stepping motor is stopped at a predetermined angle; and the voltage detection means. Detected by the rotation speed detection means starting from when the detected voltage exceeds a preset voltage threshold. A first time calculating means for calculating a time until the rotational speed exceeds a first rotational speed threshold; and a time calculated by the first time calculating means is below a preset first time threshold; An abnormality determining means for determining an abnormality of the louver; a second time calculating means for calculating a time from when the abnormality is determined until the rotational speed is stabilized to a predetermined value under the control of the rotational speed control means; If the time calculated by the second time calculation means falls below a preset second time threshold, it is determined that the abnormal state has been canceled, and if the time exceeds the second time threshold, the abnormal state continues. When the first state determination unit determines that the abnormal state has been canceled by the first state determination unit, a command signal is sent to the drive control unit so that the louver has a predetermined angle. send A decree means, when it is determined that the abnormal state continues, which includes providing a notification means for notifying the abnormal state to the user, a
The time until the rotation speed detected by the rotation speed detection means exceeds the first rotation speed threshold starting from the time when the voltage detected by the voltage detection means exceeds the preset voltage threshold is the first time. When the time is calculated by one time calculating means and falls below the first time threshold, the abnormality determining means determines that the louver is abnormal. When the time calculated by the second time calculation unit is less than the second time threshold, the first state determination unit determines that the abnormal state has been released, according to a command signal from the command unit The drive control means automatically returns the louver to a predetermined angle. Further, when the time calculated by the second time calculation means exceeds the second time threshold, it is determined that the abnormality of the louver is continuing, and the user is notified of the abnormal state by the notification means. It was decided to do.

  This achieves the intended purpose.

  According to the present invention, the abnormal state of the louver can be detected with higher accuracy by detecting the change in the rotation speed of the fan motor and the voltage induced in the stepping motor. It is possible to automatically return to the angle.

The block diagram of the air cleaner of Embodiment 1 of this invention Block diagram showing the configuration of the control circuit of the air cleaner The flowchart which shows the control action of the air cleaner of Embodiment 1 of this invention. Schematic which shows the control action of the air cleaner of Embodiment 1 of this invention.

  The air cleaner according to claim 1 of the present invention is a fan motor that drives a fan that blows air, a rotational speed detection means that detects the rotational speed of the fan motor, and the rotational speed of the fan motor according to the operation mode. Rotation speed control means for controlling to a predetermined rotation speed set in advance, louver as wind direction control means for controlling the wind direction of air blown into the room, a stepping motor for driving the louver, and a louver Drive control means for controlling the stepping motor so as to have an angle of, voltage detection means for detecting a voltage induced in the winding when the stepping motor is stopped at a predetermined angle, and the voltage detection means Is detected by the rotation speed detection means starting from the time when the voltage detected by the voltage exceeds a preset voltage threshold. A first time calculating means for calculating a time until the rotational speed exceeds a first rotational speed threshold; and a time calculated by the first time calculating means is below a preset first time threshold; An abnormality determining means for determining an abnormality of the louver; a second time calculating means for calculating a time from when the abnormality is determined until the rotational speed is stabilized to a predetermined value under the control of the rotational speed control means; If the time calculated by the second time calculation means falls below a preset second time threshold, it is determined that the abnormal state has been canceled, and if the time exceeds the second time threshold, the abnormal state continues. When the first state determination unit determines that the abnormal state has been canceled by the first state determination unit, a command signal is sent to the drive control unit so that the louver has a predetermined angle. send A decree means, when it is determined that the abnormal state continues, but with the informing means for informing the abnormal state to the user, the.

  As a result, the abnormality determination means starts from the time when the voltage detected by the voltage detection means exceeds the voltage threshold until the rotation speed detected by the rotation speed detection means exceeds the first rotation speed threshold. The time is calculated by the first time calculating means, and when the time is below the first time threshold, it is determined that the louver is abnormal. In addition, when the first state determination unit determines that the abnormal state has been released when the time calculated by the second time calculation unit falls below the second time threshold, a command signal from the command unit Accordingly, the louver is automatically returned to a predetermined angle by the drive control means, so that even when an infant or the like freely closes the louver during driving, the louver is released when the hand of the infant or the like leaves the louver. By automatically returning to the predetermined position, there is an effect that the normal operation state can be continued.

  Further, when the time calculated by the second time calculation means exceeds the second time threshold, it is determined that the abnormality of the louver is continuing, and the user is notified of the abnormal state by the notification means. Therefore, it is possible to prompt the infant or the like and surrounding users to be prompted to cancel the abnormal state by noticing the abnormal state.

  Further, the invention of the air cleaner according to claim 2, when after the notification of the abnormal state by the notification means, when the rotation speed falls below a preset second rotation speed threshold from a state where the rotation speed is stable at a predetermined value, In this configuration, second state determination means for determining that the abnormal state has been released is provided.

  As a result, when it is determined that the abnormal state has been released, an infant or the like freely operates during driving because the drive control means automatically returns the louver to a predetermined angle in response to a command signal from the command means. Even when the hand is closed, when the hand of an infant or the like leaves the louver, the louver is automatically returned to a predetermined position so that a normal driving state can be continued.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 and 2, the main body 1 of the air purifier is disposed on the floor or shelf of a general household or office.

  A front panel 2 is arranged on the front surface of the main body 1, and a suction port 3 for sucking indoor air into the side surface of the front panel 2 and a clean air arranged on the upper surface of the main body 1 for blowing out into the room. It is set as the structure provided with the blower outlet 4. FIG.

  The air outlet 4 is provided with a louver 5 that is a wind direction control means for controlling the air direction at the time of blowing, and a stepping motor 6 that drives the louver 5.

  Inside the main body 1, a filter 7 is disposed behind the front panel 2 for cleaning the sucked air, and a fan 8 for blowing the air sucked from the suction port 3 to the outlet 4 through the filter 7. And a fan motor 9 for driving the fan 8.

  Further, a rotational speed detecting means 10 for detecting the rotational speed of the fan motor 9, and a rotational speed control means 11 for controlling the rotational speed of the fan motor 9 so as to become a predetermined rotational speed set in advance according to the operation mode; Drive control means 12 is provided for controlling the stepping motor 6 so that the louver 5 has a predetermined angle.

  Further, the main body 1 includes a voltage detection unit 13, a first time calculation unit 14, an abnormality determination unit 15, a second time calculation unit 16, a first state determination unit 17, and a command unit. 18, a notification unit 19, and a second state determination unit 20.

  The voltage detection means 13 detects a voltage induced in the winding when the stepping motor 6 is stopped at a predetermined angle.

  Further, the first time calculation means 14 is configured such that the rotational speed detected by the rotational speed detection means 10 after the voltage detected by the voltage detection means 13 exceeds a preset voltage threshold exceeds the first rotational speed threshold. The time until is calculated.

  Further, the abnormality determination unit 15 determines that the louver 5 is in an abnormal state when the time calculated by the first time calculation unit 14 falls below a preset first time threshold.

  Further, the second time calculating means 16 is a time from when the abnormality determining means 15 determines that the abnormality has occurred until the rotation speed control means 11 stabilizes the rotation speed to a predetermined value set in advance according to the operation mode. Is calculated.

  The first state determination means 17 determines that the abnormal state has been canceled when the calculated time falls below a preset second time threshold, and the abnormal state continues when the calculated time exceeds the second time threshold. It is determined that you are doing.

When the command unit 18 determines that the abnormal state has been canceled by the first state determination unit 17,
A command signal is sent to the drive control means 12 so that the louver has a predetermined angle.

  The notification unit 19 notifies the user of the abnormal state when the first state determination unit 17 determines that the abnormal state continues.

  The second state determination unit 20 is set in advance from a state in which the rotation number detected by the rotation number detection unit 10 is stable at a predetermined rotation number corresponding to the operation mode after the notification unit 19 reports the abnormal state. It is determined that the abnormal state has been canceled when the value falls below the second rotation speed threshold.

  Here, it is assumed that the fan motor 9, the rotation speed detection means 10, and the rotation speed control means 11 are electrically connected.

  The louver 5 and the stepping motor 6 are mechanically connected, and the stepping motor 6, the drive control means 12, and the voltage detection means 13 are electrically connected. It is assumed that the first state determination unit 17 and the notification unit 19 are electrically connected. Rotation speed detection means 10, rotation speed control means 11, drive control means 12, voltage detection means 13, first time calculation means 14, abnormality determination means 15, second time calculation means 16, first state determination means 17 The instruction means 18 and the second state determination means 20 are assumed to be built in the microcomputer 21.

  In addition, the abnormal state is assumed to be a state in which the louver 5 is forcibly closed manually by an infant or the like.

  The cancellation of the abnormal state is a state where the hand of an infant or the like is away from the louver 5. The continuation of the abnormal state assumes a state in which a hand of an infant or the like continues to hold the louver.

  In the above configuration, the operation from when the main body 1 of the air cleaner detects an abnormal state of the louver 5 to when the louver 5 is automatically returned will be described with reference to FIGS.

  In STEPs 1 to 5, the user is operating the main body 1 of the air cleaner, and the stepping motor 6 is stopped at a predetermined angle.

  In the stopped state, no voltage is applied by the drive control means 12, and when the louver 5 is forcibly closed manually by an infant or the like in this state, a magnetic field is generated between the windings of the stepping motor 6 and the voltage is increased. Induce. Moreover, the rotation speed of the fan motor 9 changes because the pressure loss inside the main body 1 of the air cleaner changes.

  The voltage detection means 13 detects the voltage, and the first time calculation means 14 is detected by the rotation speed detection means 10 starting from when the detected voltage value exceeds a preset voltage threshold. The time until the rotational speed of the fan motor 9 exceeds a preset first rotational speed threshold value is calculated.

  Then, when the time calculated by the first time calculation unit 14 is less than the first time threshold, the abnormality determination unit 15 determines that the louver 5 is in an abnormal state that is forcibly closed by an infant or the like. To do.

  Here, the first rotation speed threshold is preferably about +20 to 50 rotations with respect to a predetermined rotation speed set in advance according to the operation mode.

  Moreover, as a 1st time threshold value, about 2 to 5 second is desirable as time until the rotation speed of the fan motor 9 changes after the louver 5 is closed.

  In STEPs 6 to 8, the operation after the abnormality determination unit 15 determines the abnormal state will be described.

  When the abnormality determination unit 15 determines the abnormal state, the second time calculation unit 16 sets the rotation number of the fan motor 9 detected by the rotation number detection unit 10 in advance according to the operation mode by the rotation number control unit 11. The time required to stabilize at the predetermined rotational speed is calculated.

  When the time calculated by the second time calculation means 16 is less than the second time threshold, the first state determination means 17 is in a state where the hand of an infant or the like who has manually pressed the louver 5 is released. It is determined that the abnormal state has been released.

  When the abnormal state is canceled, the command unit 18 sends a command signal to the drive control unit 12, and the drive control unit 12 automatically returns the louver 5 to a predetermined angle before the occurrence of the abnormal state.

  Further, when the time calculated by the second time calculation unit 16 exceeds the second time threshold, the first state determination unit 17 keeps the hand of the infant or the like who has manually pressed the louver 5 away. Recognize that the state is kept pressed, and determine that the abnormal state continues.

  If the abnormal state continues, the command unit 18 does not send a command signal to the drive control unit 12. Therefore, the drive control means 12 does not automatically return the louver 5. In this case, the notification means 19 notifies the user that the state is abnormal.

  Here, the second time threshold is 5 seconds to 10 seconds as the time from when the abnormal state is established until the rotational speed is stabilized at a predetermined value set in advance according to the operation mode by the rotational speed control means 11. About seconds are desirable.

  In STEP 9 to STEP 12, the operation after the notification of the abnormal state by the notification means 19 will be described.

  When the abnormal state is notified by the notification means 19, the second state determination means 20 is set in advance from a state where the rotational speed of the fan motor 9 is stable at a predetermined value set according to the operation mode. When it falls below the second rotation speed threshold, it is recognized that the hand of an infant or the like who has manually pressed the louver 5 is released, and it is determined that the abnormal state has been released.

  The notification means 19 stops the notification of the abnormal state when the abnormal state is canceled. When the second state determination unit 20 determines the cancellation of the abnormal state, the command unit 18 sends a command signal to the drive control unit 12, and the drive control unit 12 causes the louver 5 to move to a predetermined state before the occurrence of the abnormal state. Automatically return to angle.

  Here, as a 2nd rotation speed threshold value, about -20-50 rotations with respect to the predetermined rotation speed preset according to the operation mode is desirable.

  As described above, by detecting the voltage induced in the stepping motor 6 for driving the louver 5 in addition to the change in the rotational speed of the fan motor 9, the abnormal state of the louver 5 can be accurately detected and the abnormal state is detected. When released, the louver 5 can be automatically returned to a predetermined angle.

  The air cleaner according to the present invention can detect the abnormal state of the louver with higher accuracy by detecting the change in the rotational speed of the fan motor and the voltage induced in the stepping motor. The louver can be automatically returned to a predetermined angle, and is useful for an air purifier used in a general home or office.

DESCRIPTION OF SYMBOLS 1 Main body 2 Front panel 3 Suction inlet 4 Outlet 5 Louver 6 Stepping motor 7 Filter 8 Fan 9 Fan motor 10 Rotation speed detection means 11 Rotation speed control means 12 Drive control means 13 Voltage detection means 14 1st time calculation means 15 Abnormality Determination means 16 Second time calculation means 17 First state determination means 18 Command means 19 Notification means 20 Second state determination means 21 Microcomputer

Claims (2)

A fan motor that drives a fan that blows air, a rotation speed detection means that detects the rotation speed of the fan motor, and a rotation speed of the fan motor that is set in advance according to the operation mode. Rotational speed control means for controlling, louver which is a wind direction control means for controlling the wind direction of the air blown into the room, a stepping motor for driving the louver, and a drive for controlling the stepping motor so that the louver has a predetermined angle A control means; a voltage detection means for detecting a voltage induced in the winding when the stepping motor is stopped at a predetermined angle; and a voltage threshold value in which the voltage detected by the voltage detection means is set in advance. Until the rotation speed detected by the rotation speed detection means exceeds the first rotation speed threshold starting from A first time calculating means for calculating time, an abnormality determining means for determining that the louver is abnormal when the time calculated by the first time calculating means is below a preset first time threshold, Second time calculating means for calculating the time until the rotational speed is stabilized at a predetermined value by the control of the rotational speed control means, and the time calculated by the second time calculating means. A first state determination unit that determines that the abnormal state has been canceled when the second time threshold value is less than a preset second time threshold value, and that determines that the abnormal state continues when the second time threshold value is exceeded; When the first state determination unit determines that the abnormal state has been released, the abnormal state continues with the command unit that sends a command signal to the drive control unit so that the louver is at a predetermined angle. When When disconnection, air purifier, comprising: a notifying means for informing an abnormal state to the user, the. After the notification of the abnormal state by the notification means, when the rotation speed detected by the rotation speed detection means falls below a preset second rotation speed threshold from a state where the rotation speed is stable at a predetermined rotation speed according to the operation mode. The air cleaner according to claim 1, further comprising second state determination means for determining that the abnormal state has been released.

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