JP3945021B2 - Control method of air purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for controlling an air purifier that deodorizes air with a photocatalyst.
[0002]
[Prior art]
As an air cleaner for deodorizing air with a conventional photocatalyst, the one shown in FIG. 17 is generally known. This will be described below with reference to FIG.
[0003]
Reference numeral 1 denotes an air purifier body, which includes an electric blower 2 having a fan for sucking air, a filter 4 for filtering the sucked air, a photocatalyst 6 for deodorizing the sucked air, and a photocatalyst 6. There is a control means 8 for controlling the irradiation lamp 7 for excitation, the electric blower 2 and the irradiation lamp 7. Reference numeral 3 is an intake port for sucking air, and 5 is an exhaust port for clean air.
[0004]
The operation of the above configuration is as follows.
[0005]
Due to the rotation of the electric blower 2, air is taken into the main body 1 from the air inlet 3. First, particulate components such as dust and dust contained in the air taken in by the filter 4 are filtered, and the filtered air further passes the photocatalyst 6. At this time, mainly odor components are decomposed, and purified air is discharged from the exhaust port 5.
[0006]
The photocatalyst 6 is generally composed of titanium oxide or the like as a component, and is excited by the ultraviolet light emitted from the irradiation lamp 7 to cause the odor component to be decomposed by the catalytic action to exert a deodorizing ability.
[0007]
In addition to the above-described conventional example, there is a system that generates air flow by charging particles in the air with a high voltage without using an electric blower.
[0008]
[Problems to be solved by the invention]
In this type of conventional air purifier, the energization to the irradiation lamp 7 that excites the photocatalyst is constant, and in general, while the electric blower 2 rotates and sucks air, regardless of the odor component in the air. Since the irradiation lamp 7 is turned on, the lighting lamp 7 has a longer lighting time than necessary, and the life of the irradiation lamp 7 is thereby shortened.
[0009]
The present invention eliminates these conventional problems, obtains an efficient deodorizing capability by controlling the lighting of the irradiation lamp as necessary, extends the life of the irradiation lamp, eliminates the need to replace the irradiation lamp, and performs maintenance. The goal is to be free.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has a deodorizing means for deodorizing the sucked air,
The deodorizing means is composed of a photocatalyst, a plurality of irradiation lamps and a control means for controlling the plurality of irradiation lamps, and the control means controls the plurality of irradiation lamps to be sequentially turned on and off at the opposite timings periodically. since, with a suitable deodorizing capability, can reduce the lit time of each illumination lamp, it is possible to extend the time until the life of the illumination lamp, the need to exchange the irradiation lamp It can be eliminated.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is provided with a plurality of irradiation lamps of deodorizing means for deodorizing the sucked air so that the plurality of irradiation lamps are sequentially turned on and off at the opposite timings periodically. Since it is controlled, the time during which each irradiation lamp is lit can be reduced, the life of each irradiation lamp can be extended , and the trouble of replacing the irradiation lamp can be eliminated.
[0012]
According to the second aspect of the present invention, the plurality of irradiation lamps are all turned on / sequentially turned on and off at the opposite timings periodically according to the output of the sensor for detecting the degree of air contamination. Repeatedly controls all lamps so that they are extinguished. Therefore, efficient deodorizing ability is obtained according to the degree of air contamination, and the life of each irradiation lamp is extended . Can be eliminated.
[0013]
【Example】
Example 1
Embodiment 1 of the present invention will be described below with reference to FIGS. In addition, the same code | symbol is attached | subjected about the same component as a prior art example, and the detailed description is abbreviate | omitted.
[0014]
In FIG. 1, a first irradiation lamp 70 and a second irradiation lamp 71 are arranged so that the irradiated light strikes the photocatalyst 6. In this embodiment, the irradiation lamp is described as a fluorescent tube that emits ultraviolet light. As shown in FIG. 2, the first irradiation lamp 70 and the second irradiation lamp 71 are connected to the control means 80, and the lighting / extinction of each is controlled by the control means 80.
[0015]
The operation of the above configuration is as follows.
[0016]
As shown in the timing chart of FIG. 3a, the first irradiation lamp 70 is periodically turned on and off. Similarly, as shown in FIG. 5B, the second irradiation lamp 71 is periodically turned on and off, and the lighting timing and the lighting timing of the first irradiation lamp 70 and the second irradiation lamp 71 are opposite to each other. The control means 80 is controlling so that it may become. As a result, any one of the irradiation lamps is turned on at any time, and the photocatalyst 6 is irradiated with ultraviolet light to obtain a deodorizing ability.
[0017]
Further, in this example, the lighting time of each irradiation lamp is halved per unit time, that is, if the lifetime of the irradiation lamp is 20000 hours, twice that of the irradiation lamp is 40000 hours. Deodorizing ability can be obtained without replacement.
[0018]
In this embodiment, the number of irradiation lamps is two. However, it goes without saying that there is no problem even if the number of irradiation lamps is more than that, and the irradiation lamp may be a source of ultraviolet light other than a fluorescent tube.
[0019]
(Example 2)
Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is provided to the same component as the said Example 1, and the detailed description is abbreviate | omitted.
[0020]
As shown in FIG. 4, there is a sensor detection unit 72 for detecting the degree of air contamination in the main body of the air cleaner of this embodiment, and there is a sensor 73 (not shown) inside which monitors air. 5, the sensor 73 detects the degree of air contamination and sends the detected value to the control means 81. The control means 81 turns on / off the first irradiation lamp 70 and the second irradiation lamp 71. To control. In this embodiment, an example using a gas sensor as the sensor 73 will be described.
[0021]
The operation of the above configuration is as follows.
[0022]
According to the output of the sensor 73, if the degree of air contamination is large, all the irradiation lamps are turned on, and if the degree of air contamination is small, all the irradiation lamps are turned off. Further, when the degree of air contamination is moderate, the plurality of irradiation lamps are periodically turned on and off at the opposite timings .
[0023]
Here, it is assumed that the output of the sensor 73 has changed as shown in FIG. That is, the air contamination level is low during the period indicated by A, the air contamination level is high during the period indicated by B, and the air contamination degree is medium during the period indicated by C.
[0024]
At this time, as shown in FIGS. 2B and 2C, the irradiation lamps are turned off in the period A, and the dirt level of the air is large in the period B. It has become. Thereafter, when the degree of air contamination decreases and the degree of contamination during period C is reached, the plurality of irradiation lamps are controlled to be sequentially turned on and off sequentially at opposite timings .
[0025]
( Reference Example 1 )
Next, Reference Example 1 of the present invention will be described with reference to FIGS. The same components as those in the above embodiment are given the same reference numerals, and detailed description thereof is omitted.
[0026]
As shown in FIG. 7, the main body of the air cleaner of the present reference example includes a gas sensor detection unit 75 for detecting the degree of air contamination and a particle sensor detection unit 76, and inside the gas sensor detection unit 75. Inside the gas sensor 77 and the particle sensor detector 76, there is a particle sensor 78 (not shown). With the configuration of FIG. 8, the gas sensor 77 detects gas that is a component of odor in the air, and the particle sensor 78 detects dust and dust in the air and controls the value according to the degree of detection. 82, the control means 82 controls turning on / off of the first irradiation lamp 70 and the second irradiation lamp 71.
[0027]
The operation of the above configuration is as follows.
[0028]
The output of the gas sensor 77 turns on the irradiation lamp if the amount of gas detected in the air is large, and turns off the irradiation lamp if the amount of gas is small. In addition, according to the magnitude | size of the output of the sensor 73, you may set arbitrarily which irradiation lamp is made to light by the number of irradiation lamps. The illumination lamp is controlled to be turned on / off regardless of the output of the particle sensor 78.
[0029]
Here, it is assumed that the output of the particle sensor 78 has changed as shown in FIG. However, the irradiation lamp remains off regardless of the change, but when the value of the gas sensor 77 changes as shown in FIG. B, the irradiation lamp is turned on as shown in FIG. It can be demonstrated.
[0030]
In addition, by controlling the electric blower 2 with the control means 82 as shown in FIG. 8, when dust or dust is detected by the particle sensor 78, the electric blower 2 is operated and the filter 4 removes dust or dirt. In order to remove the odor as detected by the gas sensor 77, the photocatalyst 6 is made to function together with the electric blower 2, which is effective in terms of power saving and the life of the irradiation lamp.
[0031]
( Reference Example 2 )
Next, Reference Example 2 of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0032]
FIG. 10 shows the configuration of the gas sensor 85 of this reference example. The gas sensor 85 includes a heater 86 and a gas sensitive element 87, and the gas sensitive element 87 is heated by applying a voltage V to the heater 86. When the gas reaches the gas element 87, an oxidation reaction occurs on the surface of the gas sensitive element 87, and the electric resistance R of the gas sensitive element 87 changes. In the present invention, a gas sensor as shown in the example of FIG. R0 indicates the value of R in the air when no gas is detected.
[0033]
That is, the gas sensor has such characteristics that the change in R / R0 is small with respect to odorless carbon monoxide and hydrogen, and the change in R / R0 is large with respect to gases with bad odor such as methane and ammonia. .
[0034]
The operation of the above configuration is as follows.
[0035]
By detecting the gas with the gas sensor 85, turning on the irradiation lamp, and deodorizing with the photocatalyst, the odor of air will eventually decrease, and the detection level of the gas will decrease. When cigarettes are smoked, a large amount of hydrogen and carbon monoxide is generated, but the gas sensor 85 uses characteristics that are difficult to detect odorless hydrogen and carbon monoxide, so it is at a level close to human odor. Gas can be detected, and the air purifier can be controlled in accordance with the degree of deodorization.
[0036]
( Reference Example 3 )
Next, Reference Example 3 of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0037]
In this reference example , description will be made on the assumption that the degree of contamination of the photocatalyst 6 is estimated by integrating the operating time of the electric blower 2 of the air purifier as the degree of contamination determination means 90 of the photocatalyst 6. With the configuration shown in FIG. 12, the control unit 91 controls the illumination lamp 7 to be turned on / off according to the output of the determination unit 90.
[0038]
The operation of the above configuration is as follows.
[0039]
As shown in FIG. 13, the control means 91 operates so as to change the lighting ratio of the irradiation lamp according to the degree of contamination of the photocatalyst 6. Specifically, when the photocatalyst 6 is not soiled immediately after the start of use, the cycle of turning on / off the irradiation lamp 7 is set to, for example, a lighting time of 30% and a lighting time of 70%. When the photocatalyst 6 becomes dirty, the irradiation lamp 7 is always operated during use. Thereby, the light for exciting the photocatalyst 6 effectively can be irradiated.
[0040]
( Reference Example 4 )
Next, Reference Example 4 of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0041]
As shown in FIG. 14, there are a lighter used for igniting a cigarette and a flame detection means 88 for detecting a match flame in the body of the air cleaner of this reference example . With the configuration of FIG. 15, when the flame detection means 88 detects a flame, it sends a signal to the control means 83, and the control means 83 controls the illumination lamp 7 to be turned on / off. In this reference example , an example in which a UV sensor that detects ultraviolet rays emitted from a flame is used as the flame detection means 88 will be described.
[0042]
The operation of the above configuration is as follows.
[0043]
When a flame is detected by the output of the flame detection means 88, the irradiation lamp is turned on at that time.
Since the detection of the flame means the start of smoking, the irradiation lamp is turned on for a predetermined time T, and the irradiation lamp is turned off after the predetermined time T has elapsed. Moreover, according to the number of irradiation lamps, which irradiation lamp is turned on at a certain point in time may be arbitrarily set.
[0044]
Note that the predetermined time T may be reset from the time when the flame is detected again during irradiation of the irradiation lamp 7, or may be controlled in combination with other sensors.
[0045]
As is clear from the above embodiment, according to the invention described in claim 1, since it has a plurality of irradiation lamps and is controlled to be turned on and off sequentially at the opposite timings periodically , at any time point Any one of the irradiation lamps is turned on, and the photocatalyst is irradiated with ultraviolet light to obtain a deodorizing ability, and the life of each irradiation lamp is doubled to delay the time until the end of the life. In addition, since the lighting times of multiple irradiation lamps are all controlled to be the same time, it is possible to replace multiple irradiation lamps at once, eliminating the need to replace irradiation lamps. be able to.
[0046]
According to the second aspect of the present invention, it is possible to obtain efficient deodorizing ability according to the degree of air contamination, extend the life of each irradiation lamp, and replace a plurality of irradiation lamps at once. Therefore, the trouble of replacing the irradiation lamp can be eliminated.
[Brief description of the drawings]
1 is a cross-sectional view of an air cleaner showing Embodiment 1 of the present invention. FIG. 2 is a block diagram of the air cleaner. FIG. 3 is a timing chart showing the operation of the air cleaner. FIG. 5 is a block diagram of the air cleaner. FIG. 6 is a timing chart showing the operation of the air cleaner. FIG. 7 is an air cleaner showing Reference Example 1 of the invention. FIG. 8 is a block diagram of the air cleaner. FIG. 9 is a timing chart showing the operation of the air cleaner. FIG. 10 is a circuit structure of a gas sensor of the air cleaner showing Reference Example 2 of the invention. FIG. 11 is a sensitivity characteristic diagram of a gas sensor of the air cleaner. FIG. 12 is a block diagram of an air cleaner showing a reference example 3 of the present invention. FIG. 13 is a control characteristic diagram of the air cleaner. external view of an air cleaner showing a reference example 4 of the present invention [15] the Sectional view showing a timing chart Figure 17 conventional air cleaner showing the operation of the block diagram of the gas purifier 16 shows the air cleaner EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Main body 2 Electric blower 3 Intake port 4 Filter 5 Exhaust port 6 Photocatalyst 7 Irradiation lamp 8, 80, 81, 82, 83 Control means 70 1st irradiation lamp 71 2nd irradiation lamp 72 Sensor detection part 77, 85 Gas Sensor 78 Particle sensor 88 Flame detection means

Claims (2)

Deodorizing means for deodorizing the sucked air, wherein the deodorizing means comprises a photocatalyst, a plurality of irradiation lamps, and a control means for controlling the plurality of irradiation lamps, and the control means cycles the plurality of irradiation lamps. The control method of the air cleaner characterized by controlling to turn on and off one by one at the exact opposite timing. A sensor for detecting the degree of air contamination, and a deodorizing means for deodorizing the sucked air, the deodorizing means comprising a photocatalyst, a plurality of irradiation lamps, and a control means for controlling the plurality of irradiation lamps; The control means controls each of the plurality of irradiation lamps so that all of the irradiation lamps are turned on / off and sequentially turned on / off at regular opposite timings / all turned off in accordance with the sensor output large / medium / small. An air purifier control method characterized by the above.

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