JPH1190269A - Device for detecting abnormality of air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely detect insulation abnormality by a method in which during initial judgment time, when the first abnormality judgment requisites are satisfied, and an normal state is not detected for a prescribed length of time, abnormality is judged even when the second abnormality judgment requisites are not satisfied. SOLUTION: A high voltage generating oscillation frequency is extracted from a high voltage power source 6 which applies high voltage to an electric precipitation type dust collecting part 4, and a normal level and an abnormal level is determined on the basis of this oscillation detection signal waveform to be input in a micro-computer circuit. The circuit set up the initial 10 minute operation from the start as an initial judgment time, during the initial judgment time, when the first abnormality judgment requisites are satisfied, and a normal value which can be judged to be a normal state is not detected for a prescribed length of time, abnormality is judged after the passage of the initial judgment time even when the second abnormality judgment requisites are not satisfied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality detecting device provided for improving the safety of an air purifier of an electric dust collection type.

[0002]

2. Description of the Related Art An air purifier of an electric dust collection system generally has the following configuration.

As shown in FIG. 1, an electric dust collecting section 4 and a blower 5 are provided as a removing means for adsorbing and removing dust and the like in a main body 1, and suction is performed through a suction port 2 provided in the main body 1. The dust body in the air, etc.
, And the cleaned air is discharged from an outlet 3 provided in the main body 1.

For example, as shown in FIG. 2, the dust collecting section 4 includes an ionizing section 10 in which discharge wires 8 and ground electrode plates 9 are alternately arranged, a collecting electrode 11 and a repelling electrode 12 as an anode. Similarly, it is composed of alternately arranged collection units 13.

[0005] Therefore, when the operation switch of the device is pressed in order to clean the indoor air, the blower 5 (sirocco fan) rotates, and air starts to flow in from the suction port 2.

On the other hand, a high voltage is applied between the discharge wire 8 and the earth electrode plate 9 by the high voltage power supply 6, and a positive charge is given to dust and the like in the air flowing into the ionization section 10 by corona discharge. The charged dust and the like flows into the collection unit 13 and is adsorbed and removed by the collection electrode 11 by repelling the repulsion electrode 12 and the like.

The clean air from which dust and the like have been removed is sent out from the sirocco fan 5 and discharged from the outlet 3 to a part other than the main body 1 to clean the air.

In such an electrostatic precipitator, in order to enhance the safety (as a safety function), when the insulation between the high-voltage applying sections cannot be maintained, that is, the insulation between the high-voltage electrodes is reduced. When a situation that is not maintained occurs, the apparatus is provided with an abnormality detection device that determines that the state is abnormal, displays a warning, forcibly stops the operation, or disables the operation.

Normally, in the above-mentioned electrostatic precipitating air purifier, the following contents can be considered as cases where the insulation between the high voltage electrodes cannot be maintained.

When the dust collecting section 4 is set again after the dust collecting section 4 is removed from the main body 1 and washed, when the dust collecting section 4 (replacement cleaning type dust collecting unit) is not dried.

[0011] In the case of wire breakage (there are few occurrences during normal use, but rather erroneous breakage when cleaning the dust collection unit).

When the dust collecting portion 4 becomes dirty and becomes high in humidity (in a normal humidity environment, the performance is exhibited even if the dust collecting portion 4 becomes dirty).

Conventionally, in order to reliably detect such an abnormality and to determine and display an abnormality, an oscillation frequency of high voltage generation is extracted from a high voltage power supply 6 as shown in FIG.
An abnormal value is determined and input to the microcomputer circuit, and this value is constantly detected and determined.If an abnormal value is detected continuously for a certain period of time, or if a normal value cannot be detected, it is determined to be abnormal, and An abnormality such as the short circuit or disconnection due to the reason can be detected.

[0014]

However, in some cases, for example, a contact failure may occur in the dust collecting portion instead of the complete short circuit or disconnection. In this case, the normal value and the abnormal value are alternately repeated. Often becomes.

In this case, if the abnormal value is detected continuously for a predetermined period of time as described above, it is determined that the abnormality is abnormal, so that a contact failure state to be determined to be abnormal cannot be detected abnormally.

Therefore, in order to detect a contact failure state where such a normal value / abnormal value repeats, an abnormality is immediately determined when an abnormality is detected or when a normal value is not detected. Then, each time a single high-pressure leak (spark discharge) that should not be determined to be abnormal is generated, it is determined to be abnormal.

Therefore, conventionally, the contact failure state cannot be distinguished from a single high-pressure leak, and the contact failure state cannot be detected abnormally, or the contact failure state must be detected reliably. However, there has been a problem that even a single high-pressure leak is determined to be abnormal and unnecessary abnormal detection is performed.

The present invention has found that the above-mentioned problem exists in the conventional abnormality detecting device as a safety function. In order to solve this problem, the poor contact state hardly occurs during the operation, and It is an object of the present invention to provide an epoch-making air purifier abnormality detecting device which can reliably detect these abnormalities of abnormality and does not perform unnecessary abnormality detection by focusing on the fact that it is sufficient to judge and detect within a predetermined time. .

[0019]

The gist of the present invention will be described with reference to the accompanying drawings.

An electric precipitating dust collecting section 4 for adsorbing and removing dust and the like is provided in the main body 1, and the dust and the like in the air sucked from the suction port 2 provided in the main body 1 are applied with a high voltage. An air purifier configured to adsorb and remove the air by a dust collection unit 4 and discharge the purified air from an air outlet 3 provided in the main body 1 to detect an abnormality in insulation between high voltage application units of the air purifier. In the abnormality detection device of the above, during the initial determination time from the predetermined initial reference time such as when power is turned on, when plugging in an outlet, or when starting operation, and until a predetermined time elapses, the first abnormality determination necessary condition is continuously determined for a predetermined time. When a normal state is not detected and an abnormal state is detected continuously for a predetermined time as a second abnormality determination necessary condition, it is determined that an abnormality has occurred, and the first abnormality determination is required during the initial determination time. The condition is satisfied and the predetermined time If the normal state cannot be detected continuously, the apparatus further includes an initial operation abnormality determination device that determines that an abnormality has occurred even if the second abnormality determination necessary condition is not satisfied. The present invention relates to an abnormality detection device for an air purifier.

Also, the apparatus can be configured so as to be able to determine the normal state or the abnormal state based on the magnitude of a detection value detected by a predetermined detecting means. It is determined as abnormal when a detection value that can be determined as a normal state continuously for a predetermined period of time is not detected, and when a detection value that can be determined as an abnormal state continuously for a predetermined period of time is detected as a second abnormality determination necessary condition, Satisfying the first abnormality determination requirement during the initial determination time;
If a detection value that can be determined as a normal state continuously for the predetermined time period cannot be detected, it is determined that an abnormality occurs after the lapse of the initial determination time even if the second abnormality determination necessary condition is not satisfied. As described above, the initial operation abnormality determination device is configured to include an error display device, an error notification device, or an operation prevention device that displays or notifies an abnormality determination of the operation initial abnormality determination device or stops operation. The present invention relates to an abnormality detection device for an air purifier according to claim 1.

In the case of a contact failure state to be determined as an abnormality in which a detection value that can be determined as the normal state and a detection value that can be determined as the abnormal state due to an electrical contact failure are repeated, the abnormal state is determined. The first abnormality determination necessary condition is that the detection value that can be continuously determined as a normal state is not detected for a length of time when a detection value that can be determined to be detected is detected, and the abnormal state can be determined. In the case of a single high-pressure leak that should not be determined as anomalies in which the detected value suddenly occurs, the abnormal value is continuously detected for a length of time in which the detected value that can be determined as the normal state is detected. Detecting a detection value that can be determined as the second abnormality determination necessary condition is satisfied, the first abnormality determination necessary condition is satisfied during the initial determination time, and the normal state can be continuously determined for the predetermined time. If it failed to detect the detection value,
Even when the second abnormality determination necessary condition is not satisfied, the initial operation abnormality determination device is configured to determine an abnormality after the lapse of the initial determination time, and the abnormality is determined in the case of the poor contact state. The air purifier abnormality detection device according to any one of claims 1 and 2, characterized in that it is configured not to determine an abnormality in the case of a single high-pressure leak.

In addition, both the first abnormality determination requirement and the second abnormality determination requirement are not satisfied within the initial determination time, and the first abnormality determination requirement is satisfied during the initial determination time. In some cases, the condition may not be satisfied, and if a detection value that can be determined to be normal continuously for the predetermined time even once is detected, it is determined to be normal and the operating state is maintained or operable. The air purifier abnormality detection device according to any one of claims 1 to 3, wherein

Also, after the elapse of the initial determination time,
The abnormality detection device for an air purifier according to any one of claims 1 to 4, further comprising a non-initial-time abnormality determination device that determines an abnormality when an abnormal state is detected continuously for a predetermined time. It is related to.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

During an initial determination time from a predetermined initial reference time, such as when the power is turned on, when an outlet is inserted, or when operation is started, until a predetermined time elapses, a normal condition is determined as a first abnormality determination necessary condition for a predetermined time continuously. If the state is not detected and an abnormal state is detected continuously for a predetermined time as the second abnormality determination necessary condition, it is determined that the state is abnormal.

Therefore, when an abnormality occurs in the insulation properties such as a short circuit or a disconnection, the first abnormality determination condition and the second abnormality determination condition are both satisfied, so that the abnormality is reliably determined.

If a single non-abnormal high-pressure leak occurs, a normal state (normal value) is not detected continuously for a predetermined period of time due to the single high-pressure leak, and the first abnormality determination necessary condition is determined. Is satisfied, since it is only one-shot, an abnormal state (abnormal value) is not detected continuously for a predetermined period of time, so that the second necessary condition for abnormality determination is not satisfied and no abnormality is determined.

On the other hand, when a contact failure occurs, a normal state (normal value) and an abnormal state (abnormal value) are alternately repeated. In this contact failure state,
Even if the first abnormality determination requirement is satisfied, the second abnormality determination requirement is not often satisfied as in the case of a single high-pressure leak, and the abnormality determination is not performed in many cases.

However, in the present invention, if the first abnormality determination requirement is satisfied during the initial determination time and a normal state cannot be detected continuously for the predetermined time, the second abnormality determination is performed. Is determined to be abnormal even if the condition for determining the abnormality is not satisfied.

Therefore, in the case of a poor contact state, a state in which the normal value / abnormal value is alternately repeated continues, so that the normal state (normal value) is continuously maintained for a predetermined time during the initial judgment time. Since no detection is performed, the first necessary condition for abnormality determination is never satisfied during the initial determination time (in order to continue to satisfy the first necessary condition for abnormality determination). Is determined to be abnormal.

On the other hand, in the case of a single high pressure leak,
When a high-pressure leak occurs, even if the first abnormality determination necessary condition is satisfied, the condition is single-shot, so that a normal state (normal value) can be continuously detected for a predetermined time except for the vicinity of the high-pressure leak occurrence, Since the first necessary condition for abnormality determination is not satisfied, no abnormality is determined even after the elapse of the initial determination time.

Therefore, in the present invention, since an abnormality due to poor contact hardly occurs during operation,
Focusing on the fact that abnormalities can be detected by checking at the beginning of operation start, distinguishing between poor contact states and single high pressure leaks, reliably determining abnormalities in the case of poor contact states, and performing single high pressure leaks in the case of single high pressure leaks Unlike the conventional example, the apparatus can reliably detect an abnormality without performing an abnormality determination, and does not perform unnecessary (erroneous) abnormality detection.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

In this embodiment, an oscillation frequency for generating a high voltage is derived from a high voltage power supply 6 for applying a high voltage to the dust collection section 4 of the electric dust collection type, and a normal level and an abnormal level are determined based on the oscillation detection signal waveform. Input to the microcomputer circuit and monitor whether it is a normal value that reaches the normal level or an abnormal value that cannot reach the abnormal level. I have to.

That is, in the present embodiment, as shown in FIG. 4, during the initial determination time from when a predetermined time elapses from a predetermined initial reference time, such as when power is turned on, when an outlet is plugged in, or when operation is started, No detection value (normal value) that can be determined to be a normal state continuously for a predetermined time as the first abnormality determination necessary condition, and detection that can be determined to be an abnormal state continuously for the predetermined time as a second abnormality determination necessary condition A detection value (normal value) that is determined as abnormal when a value (abnormal value) is detected, satisfies the first abnormality determination requirement during the initial determination time, and can be determined as a normal state continuously for the predetermined time. In the case where it is not possible to detect the abnormality, the initial operation abnormality determination device is configured to determine the abnormality after the lapse of the initial determination time even if the second abnormality determination necessary condition is not satisfied. .

Specifically, in this embodiment, after the outlet is turned on, the first 10 minutes of operation from the start of operation in which a high voltage is applied between the electrodes of the dust collecting section 4 by the high voltage power supply 6 is set as the initial determination time. doing.

If this time is too long, the display of abnormal detection and warning at the time of contact failure are delayed, which is not preferable.
In addition, if the time is too short, it is not a single event that should be judged as an abnormality such as a single high-pressure leak, that is, an unnecessary error display that detects an abnormality even if it only reaches the normal level only once It will increase the possibility.

Taking this into consideration, poor contact rarely occurs during the operation, and usually occurs when the dust collection part is replaced by washing. It is set based on.

More specifically, in the present embodiment, in order to reliably fulfill the object of the present invention, a detection value that can be determined to be normal and a detection value that can be determined to be abnormal due to poor electrical contact are repeated. In the case of a contact failure state to be determined as abnormal (repeating a normal value / abnormal value), the first value is that the normal value is not continuously detected for a length of time during which the abnormal value is detected. Is a necessary condition for abnormality determination.

Specifically, the condition is that a normal value is not detected continuously for 30 seconds.

Therefore, the first abnormality judgment necessary condition is repeatedly performed during the initial judgment time (first operation for 10 minutes).
Since the monitoring determination is continued, in the case of the contact failure state, the monitoring is always considered, and the first abnormality determination necessary condition is satisfied (continues to be satisfied).

In the case of a single high-pressure leak that should not be determined as an abnormality in which the abnormal value suddenly occurs, the abnormal value is continuously detected for a length of time during which the normal value is detected. The detection is set as the second abnormality determination necessary condition.

Specifically, the condition is that an abnormal value is continuously detected for 10 seconds.

Therefore, in the case of a single high-pressure leak, even if the first abnormality determination requirement is satisfied, the second abnormality determination requirement is not always satisfied and the abnormality determination is not performed.

Further, in this embodiment, there is provided an error display device, an error notification device, or an operation inhibiting device for displaying or notifying the abnormality judgment of the abnormality judging device at the initial stage of the operation or for stopping the operation.

In other words, in this embodiment, both the first abnormality determination requirement and the second abnormality determination requirement are not satisfied within the initial determination time, and the second abnormality determination requirement is not satisfied during the initial determination time. There is a case where the abnormality determination necessary condition 1 is not satisfied, and if a normal value is detected continuously for the predetermined time (30 seconds) even once, the normal state is determined and the operating state is maintained or the operable state is maintained. It is composed.

Therefore, when an abnormality occurs in the insulation properties such as a short circuit or a disconnection, both the first and second abnormality judgment necessary conditions are satisfied, so that the abnormality is reliably judged. .

If a non-abnormal single high pressure leak occurs, it is supposed that 30
Since the normal condition is not detected continuously for a second and the first necessary condition for abnormality determination may be satisfied, and only one-shot, the abnormal value is not continuously detected for a predetermined time (10 seconds). The condition is not satisfied and no abnormality is determined.

On the other hand, when a contact failure occurs, a normal value and an abnormal value are alternately repeated. In this contact failure state, even if the first abnormality determination necessary condition is satisfied, a single shot occurs. As in the case of the high pressure leak described above, the second abnormality determination necessary condition is not often satisfied, and the abnormality determination is not often performed.

However, in the present embodiment, if the first abnormality determination necessary condition is satisfied during the initial determination time and a normal value cannot be detected continuously for the predetermined time, the second abnormality determination is performed. Is determined to be abnormal even if the condition for determining the abnormality is not satisfied.

Therefore, in the case of a poor contact state, the normal value / abnormal value is alternately repeated, and the normal value is not detected continuously for 30 minutes for the first 10 minutes of operation. After all, during the initial judgment time,
Is not satisfied (because the first necessary condition for abnormality determination is continuously satisfied for 10 minutes), for example, the abnormality is determined immediately after the lapse of 10 minutes.

On the other hand, in the case of a single high pressure leak,
When a high-pressure leak occurs, even if the first abnormality determination necessary condition is satisfied, it is only a single shot. Therefore, a normal value can be detected for 30 seconds continuously except in the vicinity of the high-pressure leak occurrence. Since the necessary condition may not always be satisfied for 10 minutes, unlike the poor contact, no abnormality is determined even after the initial determination time has elapsed.

Therefore, in the present invention, since an abnormality due to poor contact hardly occurs during operation,
Focusing on the fact that abnormalities can be detected by checking at the beginning of operation start, distinguishing between poor contact states and single high pressure leaks, reliably determining abnormalities in the case of poor contact states, and performing single high pressure leaks in the case of single high pressure leaks Unlike the conventional example, the apparatus can reliably detect an abnormality without performing an abnormality determination, and does not perform unnecessary (erroneous) abnormality detection.

In this embodiment, a non-initial-time abnormality judging device for judging an abnormality when an abnormal value is continuously detected for a predetermined time after the initial judgment time elapses is distinguished from a single-shot high-pressure leak. Abnormalities such as short-circuits and disconnections other than necessary contact failures can be constantly monitored and detected during operation even after the initial determination time has elapsed.

[0056]

Since the present invention is constructed as described above, it is possible to distinguish between a poor contact state and a single high-pressure leak, to reliably determine an abnormality in the case of a poor contact state, and to determine an abnormal state in the case of a single high-pressure leak. It is an extremely excellent and innovative air purifier abnormality detection device that does not judge an abnormality, reliably detects an abnormality unlike the conventional example, and does not perform unnecessary (erroneous) abnormality detection.

Further, according to the second aspect of the present invention, there is provided an abnormality detection apparatus for an air purifier which is more practical and can easily realize the present apparatus which reliably exhibits the above-mentioned functions and effects.

According to the third and fourth aspects of the present invention, the case of poor contact and the case of single high-pressure leak can be clearly distinguished, and the operation and effect can be more reliably exhibited. It is a revolutionary air purifier abnormality detection device.

Further, according to the fifth aspect of the present invention, an abnormality detecting apparatus for an air purifier which is more practical and can always monitor and detect an abnormality such as a short circuit or a disconnection during operation is provided.

[Brief description of the drawings]

FIG. 1 is a schematic external view of a configuration of an air purifier of the present embodiment.

FIG. 2 is a schematic configuration explanatory view of an electric dust collecting type dust collecting unit of the air purifier of the present embodiment.

FIG. 3 is an explanatory diagram showing a high-voltage power supply circuit of the air purifier of the embodiment.

FIG. 4 is a flow chart illustrating the operation of the abnormality determination device at the beginning of operation according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Inlet 3 Outlet 4 Dust collection part

Claims (5)

[Claims] 1. An electric dust-collecting unit for adsorbing and removing dust and the like is provided in the main body, and the dust or the like in the air sucked from a suction port provided in a main body is applied to the dust-collecting unit by applying a high voltage. An air purifier abnormality detection device that detects an abnormality in insulation between high-voltage application parts of an air purifier configured to adsorb and remove the air and discharge the purified air from an outlet provided in the main body. During the initial determination time from when the power is turned on, when the outlet is plugged in, or when the operation is started, and until a predetermined time elapses from a predetermined initial reference time, a normal state is continuously determined for a predetermined time as a first abnormality determination necessary condition. Not detecting, and when an abnormal state is detected for a predetermined time continuously as a second abnormality determination necessary condition, it is determined to be abnormal, and the first abnormality determination necessary condition is satisfied during the initial determination time, Normal for a predetermined period of time If the condition could not be detected,
An abnormality detection device for an air purifier, comprising: an abnormality determination device at an early stage of operation that determines an abnormality even when the second necessary condition for abnormality determination is not satisfied. 2. A method according to claim 1, wherein said normal condition or abnormal condition is determined by a magnitude of a detection value detected by a predetermined detecting means. It is determined as abnormal when a detection value that can be determined as a normal state continuously for a predetermined period of time is not detected, and when a detection value that can be determined as an abnormal state continuously for a predetermined period of time is detected as a second abnormality determination necessary condition, If the first abnormality determination requirement is satisfied during the initial determination time and a detection value that can be determined as a normal state continuously for the predetermined time cannot be detected, the second abnormality determination requirement is satisfied. Even if the condition is not satisfied, the initial operation time abnormality determination device is configured to determine that an abnormality has occurred after the elapse of the initial determination time,
The abnormality of the air purifier according to claim 1, further comprising an error display device, an error notification device, or an operation prevention device that displays or notifies an abnormality determination of the abnormality determination device at the time of initial operation or stops the operation. Detection device. 3. In the case of a contact failure state to be determined as an abnormality in which a detection value that can be determined as the normal state and a detection value that can be determined as the abnormal state due to electrical contact failure are repeated, the abnormal state is determined. The first abnormality determination necessary condition is that the detection value that can be continuously determined as a normal state is not detected for a length of time when a detection value that can be determined to be detected is detected, and the abnormal state can be determined. In the case of a single high-pressure leak that should not be determined as anomalies in which the detection value suddenly occurs, the abnormal value is continuously detected for a length of time in which a detection value that can be determined as the normal state is detected. Detecting a detection value that can be determined as the second abnormality determination necessary condition is satisfied, the first abnormality determination necessary condition is satisfied during the initial determination time, and the normal state can be continuously determined for the predetermined time. Detection value If it could not be detected, even if the second abnormality determination necessary conditions are not satisfied, the operation initial abnormality determination device is configured to determine that an abnormality has occurred after the lapse of the initial determination time, 4. The system according to claim 1, wherein an abnormality is determined in the case of the contact failure state, and an abnormality is not determined in the case of a single high-pressure leak.
The abnormality detection device for an air purifier according to any one of the preceding claims. 4. The first abnormality determination requirement and the second abnormality determination requirement are not satisfied within the initial determination time, and the first abnormality determination is required during the initial determination time. In some cases, the condition may not be satisfied, and if a detection value that can be determined to be normal continuously for the predetermined time even once is detected, it is determined to be normal and the operating state is maintained or operable. The abnormality detection device for an air purifier according to any one of claims 1 to 3, wherein: 5. A non-initial-time abnormality judging device for judging an abnormality when an abnormal state is detected for a predetermined time continuously after the initial judgment time has elapsed is provided. The abnormality detection device for an air purifier according to claim 1.