JPH1157393A - Air cleaner and control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the service life of an ultraviolet lamp and to eliminate the needless on-off action of the lamp by keeping the ultraviolet lamp in a present state for a fixed time at the time of inputting a turn-off signal or a turn-on signal to the ultraviolet lamp arranged in a deodorizing device and after that, turning-off or turning-on the ultraviolet lamp. SOLUTION: An air cleaner 1 is composed of a ventilating part 10 and a cleaning part 20 and the ventilating part 10 is constituted of a ventilating fan 11, an intake fan 12 and a heat exchanger 13. On the other hand, the cleaning part 20 is constituted of a dust collecting device 21 at the lower stage, a deodorizing device 27 at the upper stage and a cross-flow fan 33 and the deodorizing device 27 is made to constitution where 3 pieces of the ultraviolet lamp 29 are held between a pair of upper and lower photocatalytic filters 30, 31. Then, when the ultraviolet lamp 19 is controlled by on-off accompanied with the change of an air quantity mode and the turn-on or the turn-off of the ultraviolet lamp is directed, the ultraviolet lamp is controlled so as to be turned on/off corresponding to a command signal after keeping it in a present state for a fixed time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air purifier and a control method thereof. More specifically, the present invention relates to an improvement in control of an ultraviolet lamp of a deodorizing device built in an air purifier.

[0002]

2. Description of the Related Art An air purifier equipped with a deodorizing device configured to activate a photocatalyst using ultraviolet rays to decompose and remove odor components is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-19647. This publication does not specifically describe the control of the ultraviolet lamp of the deodorizing device.

[0003]

The present inventors have made intensive studies to improve such an air purifier, and as a result, have encountered the following problems.

[0004] Since ultraviolet lamps are consumables, it is desirable to extend their life as long as possible. for that purpose,
It is preferable to minimize the number of times that the ultraviolet lamp is turned on (lit) and turned off (turned off).

[0005] Depending on the operation mode of the air purifier, it may be desirable to reduce the power consumption by turning off the ultraviolet lamp. For example, when the indoor air is low in dirt and odor, the amount of air blow is reduced (the air blow is set to the weak wind mode) and the ultraviolet lamp is turned off to stop the deodorizing device.

[0006] When the ultraviolet lamp is controlled so that the ultraviolet lamp is turned off when the air blowing is in the weak wind mode, the other air blowing modes (medium wind mode and strong wind mode; in these modes, the ultraviolet lamp is turned on). Is switched to the low wind mode, the UV lamp is turned off,
On the other hand, in the opposite case, the ultraviolet lamp is turned on.

[0007] The user of the air purifier does not always select the air blowing mode in consideration of the on / off of the ultraviolet lamp, so that the air blowing mode is frequently switched. Then, the frequency of turning on and off the ultraviolet lamp increases,
That life can be significantly reduced.

In particular, when the number of buttons on the operating device is reduced as shown in FIG. 2 in consideration of user's convenience, a single air volume button is used to set a strong wind mode → a weak wind mode → a middle wind mode →
Each mode is switched continuously and cyclically like a strong wind mode (hereinafter, repeated). in this case,
In order to switch from the strong wind mode to the middle wind mode, it is necessary to go through the weak wind mode. Therefore, considering the ultraviolet lamp, when switching from the strong wind mode to the weak wind mode, the ultraviolet lamp is temporarily turned off, and when switching from the weak wind mode to the middle wind mode, the ultraviolet lamp is turned on again. Therefore, when switching from the strong wind mode to the medium wind mode, the ultraviolet lamp is turned off and on unnecessarily.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems found by the present inventors. That is, according to the first aspect of the present invention, when a deodorizing device having an ultraviolet lamp and a light-off signal or a lighting signal are input to the ultraviolet lamp, the current state of the ultraviolet lamp is maintained for a predetermined time, An air purifier including a control device for turning off or turning on the ultraviolet lamp according to a signal input after the lapse of the time has been proposed.

[0010] According to the air purifier thus configured, for example, when a turn-off signal is inputted to the ultraviolet lamp to turn off the ultraviolet lamp, the ultraviolet lamp is not turned off immediately according to the signal, but without turning off the ultraviolet lamp. The current state, that is, the ON state is maintained for a predetermined time. If the input signal has not been changed and is still a light-off signal, the ultraviolet lamp is turned off after the lapse of the predetermined time. On the other hand, when the signal input after the lapse of the predetermined time has been changed from the extinguishing signal to the lighting signal, the on state is maintained without turning off the ultraviolet lamp.
Similarly, when a lighting signal is input to the ultraviolet lamp to turn on the ultraviolet lamp, the current state of the ultraviolet lamp, that is, the off state is maintained for a predetermined time without immediately turning on the ultraviolet lamp according to the signal. . If the input signal has not been changed and is still a lighting signal, the ultraviolet lamp is turned on after the lapse of the predetermined time. On the other hand, if the signal input after the lapse of the predetermined time has been changed from the lighting signal to the light-off signal, the off state is maintained without turning on the ultraviolet lamp.

In the above, it is preferable that the predetermined time is 2 to 20 seconds. In the embodiment, the time is set to 10 seconds. Considering in light of the example of switching from the strong wind mode to the medium wind mode described in the section of the problem to be solved by the invention, according to the air purifier of the present invention, even through the weak wind mode,
In a normal case, the switching to the middle wind mode is progressing while the predetermined time has elapsed. Therefore, after the lapse of the predetermined time, the lighting signal is input to the ultraviolet lamp.
Therefore, the ultraviolet lamp is kept on, and does not needlessly be turned off and on.

Even if such a predetermined waiting time is provided, the on / off of the ultraviolet lamp is not visible to the user, and the performance of the air purifier may be affected in consideration of the subsequent operation time. Absent.

The air purifier of the present invention will be described more specifically from another aspect as follows. That is, a dust collector, a fan operated in a weak wind mode, a middle wind mode or a strong wind mode, a blow mode selection means for continuously and circulatingly selecting a weak wind mode, a middle wind mode and a strong wind mode, and a fan. A deodorizing device having an ultraviolet lamp that is turned off in the low wind mode and is turned on in the middle wind mode or the strong wind mode, and the low wind mode is predetermined after the fan is switched from the middle wind mode or the strong wind mode to the low wind mode. A lamp control means for turning off the lamp when the lamp is maintained after the first waiting time has elapsed.

In the above, the first waiting time is 2 to 20.
Can be seconds. Considering the air purifier configured as described above in light of the example of switching from the strong wind mode to the medium wind mode described in the section of the problem to be solved by the invention, after switching from the strong wind mode to the weak wind mode, If the mode is switched from the low wind mode to the medium wind mode before the waiting time elapses, the ultraviolet lamp is kept on.
Therefore, unnecessary turning on and off of the ultraviolet lamp can be prevented.

In the above example, the on / off state of the ultraviolet lamp is linked to the mode of the fan of the air purifier. Of course,
The type and number of modes and the manner of linking the ultraviolet lamp on / off for these modes are not limited to the above.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples. FIG. 1 shows a configuration of an air purifier 1 of the embodiment. The air purifier 1 includes a ventilation unit 10 and a cleaning unit 20.
It is roughly composed of The ventilation unit 10 and the cleaning unit 20 are built in the casing 2. The casing 2 is composed of a housing 3 embedded in a wall and a front panel 4 exposed inside the room. A lower edge of the front panel 4 is provided with an inlet 5 for indoor air, and an upper edge thereof is provided with an outlet 6 for purified air. Ventilation part 1 of housing part 3
An intake port 7 for room air is also opened on the lower surface on the 0 side, and the air taken in from this is discharged outside by the ventilation unit 10. An exhaust port 8 for indoor air and an intake port 9 for outdoor air are opened on the back surface of the housing unit 3 on the side of the ventilation unit 10, and each communicates with the outside through ducts (not shown).

The ventilator 10 comprises an exhaust fan 11, an air supply fan 12, and a heat exchanger 13. General-purpose fans can be used for the exhaust fan 11 and the air supply fan 12, and each of them is rotated by a common motor (not shown). The exhaust fan 11 and the air supply fan 12 are partitioned by a partition 15. The air in the room passes through the intake port 7 and the heat exchanger 13 and is discharged to the outside of the room through the discharge port 8 by the exhaust fan 11. The outdoor air is taken in from the intake port 9 by the air supply fan 12 and sent to the cleaning unit 20 through the heat exchanger 13.

The heat exchanger 13 is a first layer 1 of a corrugate which communicates the indoor air intake 7 with the exhaust fan 11.
3a and a second layer 13b of a corrugate for alternately communicating the outdoor air sent from the air supply fan 12 to the cleaning unit 20 side are alternately laminated. The heat exchanger 13 is formed of a material having a high thermal conductivity. Such a heat exchanger is well known, for example, as described in JP-A-5-269323.

Since the exhaust fan 11 and the air supply fan 12 are separated by the partition 15, there is no mixture of the exhausted indoor air and the sucked outdoor air. In the heat exchanger 13 as well, the indoor air and the outdoor air pass through dedicated corrugated layers 13a and 13b, respectively, and therefore do not mix here. The heat exchanger 13 is heated by the room air that discharges the sucked outdoor air, thereby preventing the room temperature from suddenly changing.

The air purifier 20 comprises a lower dust collector 21, an upper deodorizer 27 and a cross flow fan 33. The dust collector 21 includes an ionization electrode 23 and a dust collection electrode 25. When a high voltage is applied between the two, corona discharge starts at the ionization electrode 23. When the ions generated by the discharge come into contact with dust in the air, the dust is positively charged. Then, the positively charged dust is sucked by the dust collecting electrode 25. In addition, ion wind is generated by corona discharge. Therefore, when the indoor air is less contaminated, the cross flow fan can be stopped and the indoor air can be circulated only by this ion wind.

In the embodiment, three discharge wires are used as the ionization electrode 23. As the dust collecting electrode 25, a wound negative electrode conductive film and a positive conductive film coated with an insulating resin such as polypropylene were used. The dust sucked by the dust collecting electrode 25 adheres to the electrode film and does not separate. The voltages applied to the ionization electrode 23 and the dust collection electrode 25 were 5.65 kV and 2.4 kV, respectively. The dust collecting device 21 has a known configuration. See, for example, JP-A-9-19647.

The deodorizing device 27 comprises three ultraviolet lamps 29 and a pair of photocatalyst filters 30 and 31 sandwiching the lamps vertically. The photocatalyst filter has a structure in which activated carbon, activated carbon fiber, silica gel or the like and a photocatalyst composed of titanium dioxide or the like as an adsorbent for an odor component are supported on a gas-permeable substrate, or kneaded. The material and structure of the substrate are not particularly limited as long as they allow air to pass therethrough and stably hold the photocatalyst, but honeycomb paper or metal can be used. Alternatively, the activated carbon and the photocatalyst may be solidified with a binder to form a honeycomb shape.

The photocatalyst is not particularly limited as long as it can oxidize and decompose odor components. In addition to Ti, Cu, Zn, L
a, Mo, V, Sr, Ba, Ce, Sn, Fe, W, M
At least one selected from the group consisting of oxides of g and Al and a noble metal can be used.

When the photocatalyst filters 30 and 31 are irradiated with ultraviolet rays, the photocatalyst is activated and the odor components adsorbed on the activated carbon are oxidized and decomposed. For details, see JP-A-9-19-1
See No. 9647.

In this embodiment, an ultraviolet filter 30 is interposed between the dust collecting electrode 25 and the ultraviolet lamp 29 so as to reduce the amount of ultraviolet rays directly irradiating the dust collecting electrode 25. Thereby, deterioration of the dust collection electrode 25 can be further reduced.

The air volume of the cross flow fan 33 of this embodiment can be adjusted in three stages.

In the figure, reference numeral 35 is an odor sensor, and reference numeral 36 is
Is a dust sensor, reference numeral 37 is an indoor light intensity sensor, reference numeral 3
Reference numeral 9 denotes an infrared receiving unit that receives an infrared operation signal from the operation device 40. Reference numeral 60 indicates a control unit.

The operating device 40 is shown in FIG. In FIG.
The button 41 is used to turn on / off the automatic operation of the air purifier 1.
The lamp 42 lights up. The button 43 is used to turn on / off the clean operation.
The LED lamp 44 inside turns on. The button 45 is used to turn on / off the ventilation operation, and the LED lamp 46 in the button 45 is turned on during the ventilation operation.

The button 47 is used to select the air volume at times other than the automatic operation. When the button 47 is pressed, a strong wind mode → a weak wind mode → a medium wind mode → a strong wind mode (hereinafter, this repetition) is performed. The mode is switched continuously and cyclically. One of the LED lamps 48 to 50 corresponding to the selected air volume mode is turned on.

The dirt monitor is turned on according to the outputs of the odor sensor 35 and the dust sensor 36. For example, when indoor air pollution is moderate, that is, when the concentration of the odor component exceeds a predetermined first threshold and the concentration of dust exceeds a predetermined second threshold, one LED lamp on the lower side is used. 53 lights up. Further, when the indoor air becomes heavily soiled, that is, when the concentration of the odor component exceeds the third predetermined threshold value and the concentration of the dust exceeds the fourth predetermined threshold value, both the upper and lower LED lamps 52 and 53 are turned on. Light. The comparison and the control of the LED lamps 52 and 53 are performed by the control unit 60. The operating device 40 includes a known infrared signal generator (not shown).

FIG. 3 is a block diagram of the air purifier 1 of the embodiment. The main control unit 61 and the memory 63 are connected to the control unit 6
0. In FIG. 3, the infrared receiver 39 may be omitted, and the controller 40 may be directly connected to the main controller 61 by wire.

Next, the operation of the air purifier 1 of the embodiment will be described. Each operation is executed by the main control device 61 controlling each element based on a control program stored in the memory 63 in advance.

When the button 41 is pressed to select the automatic operation mode, the odor components and dust concentrations detected by the odor sensor 35 and the dust sensor 36 are stored in the memory 6 in advance.
3 is compared with each reference value stored in a table format. According to the result of this comparison, the air flow rate of the cross flow fan 33 is selected to one of the strong, medium, and weak air blowing modes. In this automatic operation mode, the ultraviolet lamp is always on. A voltage is always applied to the dust collector 21. In the automatic operation mode of the embodiment, the ventilation unit 1
0 is not operated, but the ventilation unit 10 can also be automatically operated.

In this automatic operation mode, when the indoor temperature measured by the indoor temperature sensor (not shown) exceeds a predetermined temperature and the outdoor temperature measured by the outdoor temperature sensor (not shown) is lower than the indoor temperature. In addition, only the air supply fan 12 of the ventilation unit 10 is driven to stop the exhaust fan 11, that is, cold outside air can be taken into the room without heat exchange to lower the room temperature.

When the air purifying mode is selected by pressing the button 43, the button 45 causes the cross flow fan 33 to operate.
Can be manually selected. At this time, the ventilation unit 10
Does not work. In order to minimize the number of buttons on the operating device 40, the air volume is selected by using only one button 45. Therefore, the air volume is switched in the order of strong wind mode → low wind mode → medium wind mode → strong wind mode (hereinafter, this is repeated). UV lamp 29 in low wind mode
Is turned off, when switching from the strong wind mode to the middle wind mode, the weak wind mode is always passed, so that the ultraviolet lamp 29 is turned on and off unnecessarily.

Therefore, in this embodiment, the unnecessary turning on and off of the ultraviolet lamp 29 is prevented by the control shown in FIG.

When the ventilation mode is selected by pressing the button 45, the ventilation unit 10 is activated in addition to the operation in the air cleaning mode described above. That is, the exhaust fan 11 and the air supply fan 12 are operated, and the ventilation of the air inside and outside the room is executed together with the air cleaning operation. At this time, the air taken in from outside the room passes through the cleaning unit 20 and is supplied to the room. In the ventilation mode, the ultraviolet lamp may be always on.

FIG. 4 is a flowchart showing control of the ultraviolet lamp. In step 1, the mode of the currently selected air volume is detected, and it is compared whether or not the air volume mode detected in step 3 has been changed from the air volume mode of unit time ago.

If the air volume mode has not been changed (step 3: N), the process returns to step 1. If the air volume mode has been changed (step 3: Y), the process proceeds to step 5,
It is determined whether the elapsed time after the change is within 10 seconds.

If the elapsed time is less than 10 seconds (step 5: Y), "the air volume has been changed" in step 3
Is canceled (step 6), and the ultraviolet lamp 29 is maintained in a state corresponding to the air volume mode before the change (step 7). On the other hand, when the elapsed time exceeds 10 seconds (Step 5: N), the state of the ultraviolet lamp is assumed to correspond to the changed air volume mode (Step 9).

Taking the case where the mode is switched from the strong wind mode to the medium wind mode as an example, the control of FIG. 4 will be described more specifically as follows. It is assumed that the residence time in the low wind mode is extremely short and is 10 seconds or less. First, since the air volume is switched from the strong wind mode to the weak wind mode, this change is recognized in step 3. However, since the residence time in the low wind mode is extremely short, the process does not proceed from step 5 to step 9, and the state of the ultraviolet lamp in the high wind mode, that is, the on state, is maintained as in steps 6 and 7. .

Meanwhile, the air volume is switched from the low wind mode to the medium wind mode. The control until 10 seconds elapses after this change is performed in step 1 → step 3 → step 5
→ The loop of Step 6 → Step 7 → Step 1 is repeated. Here, since the recognition of the change of the strong wind mode → the weak wind mode → the middle wind mode has been canceled in step 6, the immediately preceding air volume mode becomes the strong wind mode, and the ultraviolet lamp is kept on.

When the waiting time of 10 seconds elapses,
Proceeding to step 9, the state of the ultraviolet lamp corresponding to the middle wind mode, that is, the on state, is maintained. Therefore, even when the mode is switched from the strong wind mode to the middle wind mode, the ultraviolet lamp is kept on, and is not turned off in the middle.

Consider a case where the mode is switched from the low wind mode to the medium wind mode due to an erroneous operation. At this time,
If the mode is returned from the medium wind mode to the low wind mode via the strong wind mode promptly, that is, within 10 seconds, the process does not proceed from step 5 to step 9. Therefore, the ultraviolet lamp 29 is kept off and does not light up.

FIGS. 5 and 6 show the operation of the air purifier of another embodiment. In this embodiment, the configuration of the air purifier, that is, the hardware, is the same as that of the previous embodiment. The description of the operation of this embodiment is based on the assumption that an erroneous operation is performed when switching from the low wind mode to the medium wind mode.

FIG. 5 is a time chart showing the air flow and the state of the ultraviolet lamp 29. Time points (1) to (10) in FIG.
The operation of the device in is the same as in the flowchart of FIG.
It becomes clear by adding (1) to (10).

For example, at time (1), the timer (not shown) built in main controller 61 is stopped, so that the process proceeds from step 101 to step 103. Here, the air volume mode is recognized, but since the air volume mode has not been changed at time (1) (step 105; N), the ultraviolet lamp 2
9, that is, in the case of FIG. 5, the ultraviolet lamp 29 is kept off (step 119), and the process returns to step 101.

At time (2), similarly, the timer does not operate, so that the process proceeds from step 101 to step 103. Here, the change of the air volume mode is recognized (step 105;
Y) In step 107, a timer is started. The state of the ultraviolet lamp 29 is maintained (step 119).

Since the timer is running from time (3) to (9) (the timer started at time (2)), step 10
The process proceeds to step 9 where the air volume mode is recognized. Thereafter, it is determined whether or not 10 seconds have elapsed since the start of the timer (step 111). At time (3) to (8), since 10 seconds have not elapsed, the process proceeds to step 113. This step 113
Then, the mode of the air volume recognized in step 109 is canceled. Therefore, the state of the ultraviolet lamp 29 is not changed at all (step 119). In the case of FIG. 5, the ultraviolet lamp 29 is kept off.

At time (9), the elapsed time from the start of the timer is 10 seconds, so the flow proceeds to step 115.
In this step 115, the timer is temporarily stopped. Then, in step 117, the state of the ultraviolet lamp 29 corresponds to the air volume mode recognized in step 109. In the example of FIG. 5, since the air volume mode is the middle air mode, the ultraviolet lamp 29 is turned on.

At time (10), since the timer is not operating (the timer is stopped at step 115), the process proceeds from step 101 to step 103. Here, the mode of the air volume is recognized, but since the air volume mode has not been changed at time (10) (step 105; N), the ultraviolet lamp 2
9 is maintained, that is, in the case of FIG.
9 is kept on (step 119), and the process returns to step 101.

[0052]

As described above, according to the air purifier of the present invention, when a turn-off signal is input to the ultraviolet lamp to turn off the ultraviolet lamp, the ultraviolet lamp is immediately turned off in accordance with the signal. Instead, the current state of the ultraviolet lamp, that is, the on state, is maintained for a predetermined time.
If the input signal has not been changed and is still a light-off signal, the ultraviolet lamp is turned off after the lapse of the predetermined time. On the other hand, when the signal input after the lapse of the predetermined time has been changed from the extinguishing signal to the lighting signal, the on state is maintained without turning off the ultraviolet lamp. Similarly, when a lighting signal is input to the ultraviolet lamp to turn on the ultraviolet lamp, the current state of the ultraviolet lamp, that is, the off state is maintained for a predetermined time without immediately turning on the ultraviolet lamp according to the signal. .
If the input signal has not been changed and is still a lighting signal, the ultraviolet lamp is turned on after the lapse of the predetermined time. On the other hand, if the signal input after the lapse of the predetermined time has been changed from the lighting signal to the light-off signal, the off state is maintained without turning on the ultraviolet lamp.

Therefore, unnecessary turning on and off of the ultraviolet lamp can be avoided beforehand, and the life of the ultraviolet lamp can be extended.

The present invention is not limited to the description of the above-described embodiments and examples. Various modifications are included in the present invention without departing from the scope of the claims and within the scope of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a partially cutaway and partially transparent perspective view showing an air purifier according to an embodiment of the present invention.

FIG. 2 is a plan view of the operating device.

FIG. 3 is a block diagram showing components of the air purifier.

FIG. 4 is a flowchart showing control of the ultraviolet lamp similarly.

FIG. 5 is a time chart showing a flow rate mode and a state of an ultraviolet lamp of an air purifier according to another embodiment.

FIG. 6 is a flowchart showing control of the ultraviolet lamp in the same manner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air purifier 10 Ventilation part 11 Exhaust fan 12 Air supply fan 13 Heat exchanger 20 Purification part 21 Dust collection device 27 Deodorization device 29 Ultraviolet lamp 30, 31 Photocatalytic filter 40 Operator

Claims (8)

[Claims] 1. A deodorizing device having an ultraviolet lamp, and when a turn-off signal or a turn-on signal is input to the lamp,
Maintaining the current state of the lamp for a predetermined time;
A control device for turning off or on the lamp in response to a signal input after the lapse of the time. 2. An air purifier for deodorizing and collecting dust in a room, comprising: switching means for switching the operation of the air purifier between a first mode and a second mode; A deodorizing device having an ultraviolet lamp that is turned off in the first mode and turned on in the second mode; and the first device after the air purifier is switched from the second mode to the first mode. When the mode is maintained after the elapse of a predetermined first waiting time, the lamp is turned off, and after the air purifier is switched from the first mode to the second mode, the second mode is turned off. And a lamp control unit for turning on the lamp when the mode is maintained even after the elapse of a second predetermined waiting time. 3. A dust collector, a fan operated in a low wind mode, a medium wind mode or a strong wind mode, and a blow mode for continuously and circulatingly selecting the low wind mode, the medium wind mode and the strong wind mode. Selecting means, a deodorizing device having an ultraviolet lamp which is turned off when the fan is in the low wind mode and is turned on when in the medium wind mode or the strong wind mode, and wherein the fan is switched from the medium wind mode or the strong wind mode to the low wind mode And a lamp control means for turning off the lamp when the low wind mode is maintained even after a predetermined first waiting time has elapsed after the switching to. 4. The lamp control means according to claim 1, wherein said fan mode is switched from said low wind mode to said medium wind mode or said strong wind mode, and said medium wind mode or said strong wind mode is maintained even after a predetermined second waiting time has elapsed. The air purifier according to claim 3, wherein the lamp is turned on when maintained. 5. A method for controlling an ultraviolet lamp that emits ultraviolet light in a deodorizing device that decomposes odor components in air by irradiating ultraviolet light to a photocatalyst, wherein a light-off signal or a lighting signal is input to the lamp. When done
A method of controlling an ultraviolet lamp, comprising: maintaining a current state of the lamp for a predetermined time; and turning off or lighting the lamp according to a signal input after the lapse of the time. 6. A switching means for switching the operation of the air purifier between a first mode and a second mode, wherein the light is turned off when the air purifier is in the first mode and turned on when the air purifier is in the second mode. A method of controlling an air purifier, comprising: a deodorizing device having an ultraviolet lamp that performs the first mode after the air purifier is switched from the second mode to the first mode. The lamp is turned off when the air purifier has been maintained after the elapse of the predetermined first waiting time, and after the air purifier is switched from the first mode to the second mode, the second mode is set in advance. A method for controlling an air purifier, characterized in that the lamp is turned on when the lamp is maintained after a predetermined second waiting time has elapsed. 7. A dust collector, a fan operated in a low wind mode, a medium wind mode or a strong wind mode, and a blow mode in which the low wind mode, the medium wind mode and the strong wind mode are continuously and circulated to select. A control method for an air purifier, comprising: a selection unit; and a deodorizing device having an ultraviolet lamp that is turned off when the fan is in the low wind mode and is turned on when in the medium wind mode or the strong wind mode. After the fan is switched from the medium wind mode or the strong wind mode to the low wind mode, the lamp is turned off when the low wind mode is maintained after the elapse of a predetermined first waiting time. How to control the air purifier. 8. When the fan is switched from the low wind mode to the medium wind mode or the strong wind mode and the medium wind mode or the strong wind mode is maintained after a predetermined second waiting time has elapsed. The method for controlling an air purifier according to claim 7, wherein a lamp is turned on.