WO2017051523A1

WO2017051523A1 - Air purifier

Info

Publication number: WO2017051523A1
Application number: PCT/JP2016/004230
Authority: WO
Inventors: 弘士小原; 陽一宮田
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2015-09-25
Filing date: 2016-09-16
Publication date: 2017-03-30
Also published as: JP6564998B2; CN108027158A; CN108027158B; JP2017062091A

Abstract

This air purifier has a body case (1) equipped with an air inlet (2) and an air outlet (3), the interior of the body case (1) being equipped with an air blowing unit (5) for discharging from the air outlet (3) the air flowing in from the air inlet (2). The air purifier is also equipped with: an air purifying unit (4) which purifies the air flowing from the air inlet (2); a contamination detection unit (6) which outputs an output signal corresponding to the level of contamination in a room; and a control unit (7) which controls the air blowing unit (5) on the basis of the output signal output by the contamination detection unit (6). The air purifier is also equipped with a correction unit which corrects the output signal output by the contamination detection unit (6) on the basis of the correction information preset by taking into account the effect of wind within and without the body case (1) generated by the air blowing unit (5).

Description

Air cleaner

The present invention relates to an air cleaner.

Conventionally, the main body case has an air purifying part such as a filter and a blower part such as a fan motor, and the air purifier removes (collects) air dust sucked from the suction port by driving the air blowing part. ) Is known (for example, see Patent Document 1).

The air cleaner of Patent Document 1 includes a dirt detection unit (second detection device in Patent Document 1) that detects fine particles such as dust contained in the air, and drives the blower unit based on the detection result of the dirt detection unit. Is to control. Moreover, in this air cleaner, in order to achieve stable sensing in the dirt detection unit, a flow rate measurement unit (first detection device in Patent Document 1) that directly or indirectly measures the flow rate of air passing through the dirt detection unit. The amount of air passing through the dirt detection unit is adjusted.

JP 2013-130362 A

By the way, the air cleaner as described above includes a flow rate measuring unit that directly or indirectly measures the flow rate of air passing through the dirt detection unit, and is stable by adjusting the amount of air passing through the dirt detection unit. Sensing is possible. However, there is a concern about the increase in the number of parts due to the provision of the flow rate measurement unit, and an air cleaner that can operate in consideration of the influence of wind at the dirt detection unit while suppressing the increase in the number of components is desired. Yes.

The present invention provides an air cleaner capable of operating in consideration of the influence of wind generated by the air cleaner while suppressing an increase in the number of parts.

The air purifier according to the present invention includes a blower unit for blowing the air flowing in from the suction port into the main body case having the suction port and the blowing port, and the air purifying unit for blowing the air flowing in from the suction port. . In addition, a dirt detection unit that outputs an output signal in accordance with dirt in the room, and a control unit that controls the blower unit based on the output signal output from the dirt detection unit. Furthermore, a correction unit is provided that corrects the output signal output from the dirt detection unit based on correction information set in advance in consideration of the influence of the wind inside and outside the main body case generated by the air blowing unit.

According to the air cleaner of the present invention, it is possible to operate in consideration of the influence of wind generated by the air cleaner while suppressing an increase in the number of parts.

FIG. 1 is a perspective view of an air cleaner according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the air cleaner in one embodiment of the present invention. FIG. 3 is a block diagram of the air cleaner according to one embodiment of the present invention. FIG. 4 is a graph showing the relationship between the rotational speed of the fan motor of the air cleaner and the sensor output of the dirt detection unit in one embodiment of the present invention. FIG. 5 is an explanatory diagram showing the relationship between the sensor output ratio of the dirt detection unit and the correction coefficient according to the difference in the air volume setting of the air cleaner in one embodiment of the present invention. FIG. 6A is a graph showing a state in which the output correction of the dust sensor by the correction unit of the air cleaner in one embodiment of the present invention is applied. FIG. 6B is a graph in a state where the output correction of the dust sensor by the correction unit of the air cleaner in one embodiment of the present invention is not applied. FIG. 7A is a graph showing a state in which the output correction of the dust sensor by the correction unit of the air cleaner in one embodiment of the present invention is applied. FIG. 7B is a graph in a state where the output correction of the dust sensor by the correction unit of the air cleaner in one embodiment of the present invention is not applied.

Hereinafter, an embodiment of an air cleaner will be described with reference to the drawings.

As shown in FIG. 1, the air cleaner of the present embodiment has a substantially box-shaped main body case 1, and a suction port 2 is provided on the front side of the main body case 1. Further, a blowout port 3 is provided on the upper surface (top surface) side of the main body case 1.

As shown in FIGS. 1 and 2, the suction port 2 is provided with a filter 4 as an air purifying part in a detachable manner. The filter 4 has two types of

filters

4a and 4b. The filter 4a functions as a dust collecting filter that collects dust, so-called PM2.5, for example, and the filter 4b functions as a deodorizing filter that removes odors. In the main body case 1, a fan motor 5 is accommodated as a blower for blowing air flowing in from the suction port 2 through the blowout port 3.

Further, a dust sensor 6 as a dirt detection unit is provided on the side surface of the main body case 1.

Further, a control unit 7 that controls various types of driving is provided on the upper side of the main body case 1, and a front panel 8 is provided on the front side of the filter 4 so as to cover the filter 4.

As shown in FIG. 3, the control unit 7 includes an operation unit 9, a display unit 10, a correction unit 11, and a storage unit 12. In addition, a dust sensor 6 and a fan motor 5 are electrically connected to the control unit 7. The control unit 7 controls the fan motor 5 based on the output signal of the dust sensor 6.

The operation unit 9 includes a plurality of operation switches that can be operated by the user. As an example of the operation unit 9, the adjustment of the air volume can be switched according to the user's preference. For example, “weak”, “medium”, and “strong” can be set in order from the lowest air volume. Yes. In addition to this, “automatic air volume” for adjusting the air volume (adjusting the rotation speed of the fan motor 5) based on the output signal of the dust sensor 6 can be set.

The display unit 10 notifies the user of the current operating condition (air volume, etc.) of the air purifier based on the operation of the operation unit 9.

The correction unit 11 corrects the output signal of the dust sensor 6 based on a correction coefficient preset in the storage unit 12 described later. Since the correction unit 11 is composed of a one-chip microcomputer constituting the control unit 7 that controls various driving operations, the correction unit 11 and the control unit 7 are substantially the same member.

The storage unit 12 stores in advance correction coefficients that take into account fluctuations in the output ratio of the dust sensor 6 caused by the influence of wind generated by the fan motor 5.

Hereinafter, the relationship between the rotation speed of the fan motor 5 and the fluctuation of the output ratio of the dust sensor 6 will be described.

As shown in FIG. 4, when the sensor output of the dust sensor 6 when the fan motor 5 is not rotating is set to 1, the sensor output ratio tends to increase (directly proportional) as the rotational speed of the fan motor 5 increases. Become. More specifically, as shown in FIG. 5, when the sensor output ratio is “1.00” when the air volume setting is the lowest air volume setting “0” (the rotation speed of the fan motor 5 is zero), The sensor output ratio when the air volume setting is “1” is “1.16”. Then, in order, when the air volume setting is “2”, the sensor output ratio is “1.23”, when the air volume setting is “3”, the sensor output ratio is “1.37”, and when the air volume setting is “4”. When the sensor output ratio is “1.43” and the air volume setting is “5”, the sensor output ratio is “1.50”. Further, the sensor output ratio when the air volume setting is “6” is “1.58”, the sensor output ratio when the air volume setting is “7” is “1.68”, and the sensor when the air volume setting is “8”. The sensor output ratio is “1.90” when the output ratio is “1.85”, the air volume setting is “9”, and the sensor output ratio is “1.95” when the air volume setting is “10”. Taking these things into consideration, the correction coefficient is set in the storage unit 12 of the air purifier in the present embodiment in accordance with the air volume (the number of rotations of the fan motor 5). Specifically, the reciprocal of the sensor output ratio is set as a correction coefficient, and these correction coefficients (correction information) are stored in the storage unit 12.

The operation (one operation example) of the air cleaner configured as described above will be described.

In the air cleaner in the present embodiment, the operation unit 9 is operated by the user, and the control unit 7 controls the driving of the fan motor 5 based on the operation. At this time, for example, when “automatic air volume” is set, the controller 7 controls the rotational speed of the fan motor 5 in accordance with the output signal of the dust sensor 6 to adjust the air volume. . That is, when the control unit 7 determines that the amount of dust and the like in the room is dirty due to the output signal of the dust sensor 6, the fan motor 5 is driven at a high rotation speed to increase the air volume, thereby removing the dirt in the room. It is designed to be removed quickly. On the other hand, when the control unit 7 determines that the amount of dust and the like in the room is small based on the output signal of the dust sensor 6, the fan motor 5 is set to the lowest rotation (including motor stoppage, for example) to save power. ing.

Here, the processing when “air volume automatic” is set, for example, when the air volume is changed will be described with reference to FIGS. 6A and 6B. 6A shows a case where the correction process is applied in the air cleaner in the present embodiment, and FIG. 6B shows a case where the correction process is not applied in the air cleaner in the present embodiment as a reference example. Is shown.

As shown in FIG. 6B, when the rotation speed of the fan motor 5 is increased and the air volume is increased at the timing t1, the air volume in the vicinity of the dust sensor 6 increases, so that the sensor output (output signal) increases. . If the change in the air volume setting at this time is “3” → “4”, the sensor output ratio changes from “1.37” → “1.43” as shown in FIG. On the other hand, when the correction process is performed, even if the air volume setting is changed, the correction unit 11 corrects the correction coefficient corresponding to the corresponding air volume setting from among the correction coefficients stored in the storage unit 12 (main book). In the example, 0.70) is acquired, and the sensor output (output signal) is corrected using the correction coefficient. Then, as indicated by a timing t1 in FIG. 6A, a change in sensor output due to the influence of wind is suppressed.

Further, as shown in FIG. 6B, when the rotational speed of the fan motor 5 is decreased at the timing t2 and the air volume is decreased, the air volume in the vicinity of the dust sensor 6 also decreases, so that the sensor output (output signal) Becomes lower. If the change in the air volume setting at this time is “4” → “3”, the sensor output ratio changes from “1.43” → “1.37” as shown in FIG. On the other hand, when the correction process is performed, even if the air volume setting is changed, the correction unit 11 corrects the correction coefficient corresponding to the corresponding air volume setting from among the correction coefficients stored in the storage unit 12 (main book). In the example, 0.73) is acquired, and the sensor output (output signal) is corrected using the correction coefficient. Then, as indicated by the timing t2 in FIG. 6A, the change in the sensor output due to the influence of the wind is suppressed.

Next, the effect of this embodiment will be described.

(1) Sensor output (output signal) output by the dust sensor 6 based on a correction coefficient set in advance in consideration of the influence of the wind inside and outside the main body case 1 generated by driving the fan motor 5 The correction part 11 which correct | amends these is provided. Thereby, the change of the sensor output of the dust sensor 6 by the influence of a wind is suppressed. In addition, since it is not necessary to provide a measurement unit for measuring the air volume separately, an increase in the number of parts can be suppressed.

(2) The correction unit 11 corrects the sensor output (output signal) of the dust sensor 6 using a correction coefficient set in advance according to the air volume setting of the fan motor 5. Thus, paying attention to the fan motor 5 that generates air in the air cleaner, correction according to the air volume setting of the fan motor 5 can be performed, and therefore a measurement unit for measuring the air volume is provided separately. Therefore, appropriate correction is possible.

Note that the above embodiment may be modified as follows.

That is, although not particularly mentioned in the above-described embodiment, for example, the time required for stabilizing the sensor output (output signal) of the dust sensor 6 due to the change in the air volume may be considered.

As shown in FIG. 7B, it takes a predetermined period of time T1 and T2 until the output signal of the dust sensor 6 is stabilized as the air volume of the fan motor 5 is changed. These change depending on the responsiveness of the dust sensor 6 and the installation position of the dust sensor 6. In other words, it is inevitably determined at the time of design.

For this reason, when the predetermined periods T1 and T2 are stored in the storage unit 12 and change stepwise (proportional) as shown in FIG. 7B in the periods T1 and T2, correction coefficients are calculated stepwise, for example. The sensor signal (output signal) may be corrected by the calculation. Here, when the correction coefficient before the air volume change is A1, the correction coefficient after the air volume change is A2, and the data acquisition timing (sensor signal output timing) by the dust sensor 6 is n, the correction coefficient in the predetermined period T1 is A1 + (A2-A1) * n / T1. Similarly, the correction coefficient in the predetermined period T2 is represented by A1 + (A2-A1) * n / T2. The data acquisition timing n is a timing based on the start time of the predetermined periods T1 and T2. For example, when the predetermined periods T1 and T2 are 1 second, the data acquisition timing n is an intermediate position of the predetermined period T1. N = 0.5.

By adopting such a configuration, it is possible to suppress a large change in the sensor output ratio as shown in FIG. 7A in consideration of the time required for stabilization.

In addition, for example, in the predetermined periods T1 and T2, the correction result (correction result (maintenance correction coefficient)) corrected by the correction coefficient (holding correction coefficient) before the change of the air volume without performing the correction (change) of the output signal is not limited to such a configuration. (Holding correction result) may be held (fixed). As a result, changes in the sensor output ratio caused by changing the correction coefficient during the predetermined periods T1 and T2 can be suppressed.

Also, the following configuration may be adopted. That is, a correction result (correction result after changing the air volume) using the correction coefficient after changing the air volume in the predetermined period T1, T2, and a sensor signal (output signal) using the holding correction coefficient described above. ) Is corrected and the correction result (holding correction result) is compared. And as a result of the comparison, for example, when the air volume is changed in the direction of increasing (period T1), the correction result after the air volume change is increased, or when the air volume is changed in the direction of decreasing the air volume ( In the period T2), when the correction result after the air volume change becomes small, the correction result after the air volume change (correction result after the air volume change) may be changed.

Specifically, for example, when the air volume setting is changed from “3” to “4” at the start timing of the predetermined period T1, and the air volume is changed without changing the correction coefficient as described above, the air volume change is performed. The previous correction coefficient is “0.73”, but after the air volume change, the correction coefficient is “0.70”. Similarly, when the air volume setting is changed from “4” to “3” at the start timing of the predetermined period T2 and is held without changing the correction coefficient as described above, the correction coefficient before the air volume change is maintained. Becomes “0.70”, but after the air volume change, the correction coefficient becomes “0.73”. However, since the sensor output of the dust sensor 6 may be changed due to dust or the like during the predetermined period T1, for example, the correction result after the air volume change obtained by applying the correction coefficient after the air volume change as described above is used. It is preferable to respond immediately.

Further, for example, a predetermined ratio width (± 10%, etc.) is given to the held correction result, and when the deviation is out of this range, the comparison processing with the held correction result set within this range is performed. Thus, a configuration in which the correction result is changed may be adopted.

In the above-described embodiment, the correction coefficient is set stepwise according to the air volume setting of the fan motor 5. For example, a configuration in which the correction coefficient is continuously set according to the rotation speed of the fan motor 5 is adopted. Also good. In consideration of the fact that the rotational speed of the fan motor 5 and the air flow determined by the specifications of the air purifier are in a proportional relationship, a configuration in which a correction coefficient is calculated and used in the correction unit 11 may be employed. . The calculation in this case can be performed by the correction unit 11 or the control unit 7, for example.

In the above-described embodiment, for example, the information detected by the dust sensor 6 is displayed on the display unit 10 for notification, but the notification method is not limited to this method, and may be performed by voice or the like. Moreover, you may employ | adopt the structure which does not alert | report.

In the above-described embodiment, the control unit 7 has the function of the correction unit 11 and the correction is performed by, for example, a one-chip microcomputer. However, the configuration is not limited to this. You may comprise the function of the correction | amendment part 11 with another microcomputer etc. from the control part 7. FIG.

Moreover, in the said embodiment, although the position of the dust sensor 6 as a stain | pollution | contamination detection part was provided in the position remove | deviated from the air path (flow path) between the suction inlet 2 and the blowing outlet 3, it is provided with the suction inlet 2 and the blowing. You may employ | adopt the structure which provides the dust sensor 6 in the wind path (flow path) between the opening | mouths 3. FIG.

In the above embodiment, the correction coefficient is set by using the fact that the rotational speed of the fan motor 5 and the output ratio of the dust sensor 6 are in direct proportion, but the present invention is not limited to this configuration. For example, even if the rotational speed of the fan motor 5 and the output ratio of the dust sensor 6 are inversely proportional or in other relationships, the manufacturer side (manufacturer side) confirms them in advance at the time of design (manufacturing) and sets the correction coefficient. It is possible to set.

In the above embodiment, the filter 4 is composed of the filter 4a and the filter 4b. However, the number of the filters 4 may be changed to one or three or more as appropriate.

Further, although not particularly mentioned in the above embodiment, for example, a configuration provided with a humidifying unit that humidifies the room or a dehumidifying unit that dehumidifies the room may be further added.

Further, the above embodiment and each modification may be combined as appropriate.

Next, the technical ideas that can be grasped from the above embodiment and other examples are added as additional notes below.

(Appendix 1) An air purifier having a blower section for blowing air flowing in from the suction port into the main body case having the suction port and the blowout port. In addition, an air purifier that cleans the air flowing in from the suction port, a dirt detector that outputs an output signal according to the dirt in the room, and a control that controls the blower based on the output signal output from the dirt detector Part. A correction unit that corrects the output signal output from the dirt detection unit is provided based on correction information set in advance in consideration of the influence of the wind inside and outside the main body case generated by the blower.

(Additional remark 2) It is an air cleaner of Additional remark 1, Comprising: A correction | amendment part uses the correction information preset according to the air volume setting of the ventilation part, or the rotation speed of the ventilation part, and is the output signal of a dirt detection part. Make corrections.

(Additional remark 3) It is an air cleaner of Additional remark 1 or Additional remark 2, Comprising: It has a memory | storage part which memorize | stores beforehand the stabilization time until the output signal of the stain | pollution | contamination detection part produced with the air volume change of a ventilation part becomes stable. . And a correction | amendment part hold | maintains the correction result of the output signal before an air volume change even if the air volume change of a ventilation part is performed, and uses the hold | maintained correction result for the stabilization time.

(Additional remark 4) It is an air cleaner of Additional remark 1 or Additional remark 2, Comprising: It has a memory | storage part which memorize | stores beforehand the stabilization time until the output signal of the stain | pollution | contamination detection part produced with the air volume change of a ventilation part is stabilized. . Moreover, a correction | amendment part hold | maintains the correction result of the output signal before an air volume change, when the air volume change of a ventilation part is performed. In addition, during the stabilization time, the correction result after changing the air volume using the correction information after changing the air volume is compared with the retained correction result held. When the air volume is changed in the direction in which the air volume is increased and the correction result after the air volume change is increased, or when the air volume is changed in the direction in which the air volume is decreased and the air volume change correction result is decreased. In this case, the correction result after the air volume change is used, and in other cases, the holding correction result is used.

(Additional remark 5) It is an air cleaner of Additional remark 1 or Additional remark 2, Comprising: It has a memory | storage part which memorize | stores beforehand the stabilization time until the output signal of the stain | pollution | contamination detection part produced with the air volume change of a ventilation part is stabilized. . Then, the correction unit corrects the output signal output from the dirt detection unit based on the correction information changed stepwise during the stabilization time.

As described above, the air cleaner according to the present invention can correct the output of the dust sensor without measuring the air volume, and the above configuration can be applied when the dust sensor is used in, for example, other air conditioners. It is.

1 Body Case 2 Suction Port 3

Blowout Port

4, 4a, 4b Filter (Air Cleaner)
5 Fan motor (blower)
6 Dust sensor (dirt detector)
7 Control unit 8 Front panel 9 Operation unit 10 Display unit 11 Correction unit 12 Storage unit

Claims

In a main body case provided with a suction port and a blowout port, a blower unit for blowing air flowing in from the suction port from the blowout port, an air purifying unit for purifying air flowing in from the suction port, and an indoor An air cleaner having a dirt detection unit that outputs an output signal in accordance with dirt, and a control unit that controls the air blowing unit based on an output signal output from the dirt detection unit,
A correction unit configured to correct an output signal output from the dirt detection unit based on correction information set in advance in consideration of the influence of the wind inside and outside the main body case generated by the air blowing unit; An air purifier characterized by that.
The said correction | amendment part correct | amends the output signal of the said soiling detection part using the said correction information preset according to the air volume setting of the said ventilation part, or the rotation speed of the said ventilation part. Air cleaner as described in.
A storage unit for preliminarily storing a stabilization time until the output signal of the dirt detection unit generated along with the air volume change of the blower unit is stabilized;
The correction unit holds a correction result of the output signal before the air volume change even if the air volume of the air blowing unit is changed, and uses the correction result held during the stabilization time. The air cleaner according to claim 1 or 2.
A storage unit for preliminarily storing a stabilization time until the output signal of the dirt detection unit generated along with the air volume change of the blower unit is stabilized;
The correction unit is
When the air volume change of the air blowing unit is performed, the correction result of the output signal before the air volume change is held,
Comparing the correction result after the air volume change obtained by correcting the output signal using the correction information after the air volume change during the stabilization time and the held correction result held,
When the air volume is changed in the direction of increasing the air volume and the correction result after the air volume change is large, or when the air volume is changed in the direction of decreasing the air volume and the air volume change correction result is small The air purifier according to claim 1 or 2, wherein the correction result after the air volume change is used for the air flow rate, and the holding correction result is used in other cases.
A storage unit for preliminarily storing a stabilization time until the output signal of the dirt detection unit generated along with the air volume change of the blower unit is stabilized;
The air cleaner according to claim 1, wherein the correction unit corrects an output signal output from the dirt detection unit based on correction information that is changed stepwise in the stabilization time. Machine.