JPH0753719Y2 - air purifier - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to an air purifier capable of selectively collecting dust and eliminating odor.

(Problems to be Solved by Conventional Techniques and Inventions) In recent years, the number of vehicles in which an air purifier is installed inside a vehicle is increasing. This air purifier collects dust and deodorizes the air in the passenger compartment.

Usually, an air purifier is provided with an electrostatic filter that charges dust that exists in the sucked air and collects the charged dust, and an activated carbon filter that deodorizes the sucked air. ing. Therefore, dust collection is performed by the electrostatic filter, and deodorization is performed by the activated carbon filter.

Further, recently, focusing on the deodorizing function of ozone, an ozone deodorizer has been developed as disclosed in, for example, Japanese Utility Model Publication No. 1-128823. This ozone deodorizer is provided with an ozone generator that positively generates ozone by applying a high voltage and a catalyst that decomposes ozone generated from the ozone generator so as not to harm humans. Has been. Therefore, the inhaled air is deodorized by the ozone generated from the ozone generator, while this ozone is decomposed by the catalyst, and the deodorizer emits deodorized air with a very low ozone concentration. Will be done.

By the way, in the electrostatic filter provided in the air purifier, ozone is inevitably generated from this filter because corona discharge is caused by a high voltage in order to charge dust. Therefore, by positively utilizing this ozone, it becomes possible to impart a deodorizing function without using activated carbon.

The present invention has been made by paying attention to the above circumstances, and it is possible to select not only those having both the function of collecting dust and the function of deodorizing as in the past, but also the respective functions, and The purpose is to provide an air purifier that does not emit ozone odor.

[Means for Solving the Problem] (Means for Solving the Problem) The present invention for achieving the above object is directed to a fan device for introducing air into an air circulation path, and dust existing in the air introduced by the fan device. Dust collecting means for collecting fine powder particles such as, and an ozone decomposing catalyst for decomposing ozone generated from the dust collecting means are respectively provided in the air circulation path, and the fan device and the dust collecting means are operated for these operations. The control means is contacted as a whole, and the control means mainly generates a dust collection voltage for charging dust when performing dust collection, and generates an amount of ozone capable of deodorizing mainly during deodorizing. It is characterized by further comprising voltage applying means for selectively applying a deodorizing voltage lower than the dust collecting voltage to the dust collecting means.

(Operation) With such a configuration, the air purifier can function as follows.

When the air purifier is intended to mainly function as a dust collector, the control means applies the dust collecting voltage from the voltage applying means to the dust collecting means. By applying this voltage, the dust collecting means not only exerts its function as a dust collector to the maximum extent, but at the same time, since a relatively large amount of ozone is generated, it also functions as a deodorizer. Then, the generated ozone is decomposed when it passes through the ozone decomposition catalyst, so that the smell of ozone does not drift in the vehicle interior.

In addition, when it is intended to function mainly as a deodorizer,
The control means applies the deodorizing voltage from the voltage applying means to the dust collecting means. By the application of this voltage, the function of the dust collecting means as a dust collector is deteriorated, but even at this voltage, since the dust collecting means generates enough ozone to perform its deodorizing function, The odor in the passenger compartment can be sufficiently eliminated. Since the applied voltage is lowered when the deodorizer is functioning as described above, it is possible to save power consumption.

(Example) Hereinafter, the air purifier of this invention is demonstrated in detail based on drawing.

FIG. 1 is a schematic configuration diagram of an air purifier according to the present invention, and FIG.
FIG. 1 is a schematic configuration diagram of a control system of an air purifier according to the present invention,
FIG. 3 is a specific circuit diagram of the control unit and the high voltage generating unit shown in FIG.

As shown in FIG. 1, an air purifier case 10 is provided with an inlet 12 for introducing air in the vehicle interior and an outlet 14 for blowing out air after dust collection and deodorization. There is. And in the case 10, an electrostatic filter 16 which functions as a dust collecting means for collecting dust existing in the introduced air, and ozone which functions as a deodorizing means,
An ozone decomposing catalyst 18 for decomposing ozone generated from the electrostatic filter 16 and an air inlet 12 for exhausting air in the passenger compartment
An electrostatic filter 16 and a fan device 20 that is circulated through the ozone decomposition catalyst 18 are provided toward the device 14. The voltage applied to the electrostatic filter 16 and the rotation speed of the fan motor 20M forming the fan device 20 are controlled by the control device 22 that is a control unit. Therefore, the fan device 20
The air introduced through the introduction port 12 is deodorized by ozone almost at the same time as the dust is collected by the electrostatic filter 16, and the ozone odor is erased by the ozone decomposition filter 18 and discharged from the discharge port. become.

FIG. 2 is a block diagram showing a control system of the air purifier shown in FIG.

The fan speed setting switch 25 that sets the rotation speed of the fan motor 20M, the deodorant switch 26 that causes the air purifier to function mainly as a deodorizer, and the air purifier function automatically as a dust collector or deodorizer. The automatic mode switch 27 for operating the control unit 30 is provided in the control unit 22.
Connected to. The above switch is arranged in the case 10 of the air purifier. The rotation speed of the fan motor 20M depends on the setting of the fan speed setting switch 25.
Controlled by. A high voltage generator 32 that applies a high voltage to the electrostatic filter 16 is connected to the control unit 30,
This high-voltage generating unit 32 applies a deodorizing voltage to the electrostatic filter 16 so that the air purifier mainly functions as a deodorant when the deodorant switch 26 is turned on. On the other hand, when the deodorizing switch 26 is off, a dust collecting voltage is applied to the electrostatic filter 16 to enter the dust collecting mode so that the air purifier mainly functions as a dust collector.
When the automatic mode switch 27 is turned on, the control unit 30 outputs a signal to the high voltage generation unit 32 so that the deodorant mode and the dust collection mode described above are alternately switched at fixed time intervals.

FIG. 3 is a more specific block diagram of the control device 22 shown in FIG.

The control unit 30 includes a command unit 30A and a timer unit 30B. The command unit 30 controls the voltage applied from the high voltage generation unit 32 to the electrostatic filter 16 according to the ON / OFF signals from the deodorant switch 26 and the automatic mode switch 27.
For example, in a normal state in which both the deodorant switch 26 and the automatic mode switch 27 are turned off, the high voltage generator 32
A high voltage of about 5 KV is output from the rectifier 33.
Further, when the deodorizing switch 26 is turned on, a high voltage of about 3.8 KV is output from the high voltage generating unit 32 via the rectifier 33. Further, when the automatic mode switch 27 is turned on, the timer unit 30B is activated, and a mode change signal is output to the command unit 30A at predetermined time intervals, and a high level change signal is output based on this mode change signal. In order to charge dust in the air from the voltage generation unit 32, a high voltage of about 5 KV as a dust collection voltage and a high voltage of about 3.8 as a deodorization voltage for generating an amount of ozone capable of deodorizing a high voltage. Are alternately output via the rectifier 33.

By the way, various characteristics of the air purifier are as shown in FIGS. 4 to 7, and have the following characteristics.

The characteristic shown in FIG. 4 is a graph showing the relationship between the air cleanliness and the voltage applied to the electrostatic filter 16. As is clear from this graph, it can be seen that the air cleanliness decreases as the applied voltage decreases. The air cleanliness is obtained by dividing the smoke concentration collected by the initial smoke concentration.
Decrease in air cleanliness means that electrostatic filter 16
It means that the dust collecting ability of the P.sub.2 decreases as the applied voltage decreases.

Further, FIG. 5 shows the relationship between the voltage applied to the electrostatic filter 16 and the current flowing through it. As can be seen at a glance from this graph, if the applied voltage to the electrostatic filter 16 is lowered, the flowing current is also lowered. Therefore, when the applied voltage is reduced, the power consumption of the electrostatic filter 16 is reduced.

What can be said from the graphs of FIG. 4 and FIG. 5 above is that when the applied voltage of the electrostatic filter 16 is lowered, the dust collecting ability is reduced and the power consumption is reduced.

Next, the characteristics shown in FIG. 6 are the voltage applied to the electrostatic filter 16 and the ozone concentration in the vehicle compartment when the inside air is circulated. As shown in the figure, when the applied voltage decreases, the ozone concentration in the vehicle interior decreases. That is, it is shown that if the voltage applied to the electrostatic filter 16 decreases, the amount of ozone generated therefrom also decreases. In the present embodiment, in the normal state where both the deodorant switch 26 and the automatic mode switch 27 are turned off, the high voltage generator is
A high voltage of about 32 to 5 KV is applied to the electrostatic filter 16, but when such a high voltage is applied and no catalyst that decomposes ozone is interposed, the inside air circulation ozone concentration is As shown in the figure, it will be about 1.1 ppm. Further, when the deodorant switch 26 is turned on, a high voltage of about 3.8 KV is applied to the electrostatic filter 16 from the high voltage generation unit 32, but when such a high voltage is applied, When there is no catalyst that decomposes ozone, the ozone concentration in the internal air circulation is about 0.1 ppm as shown in the figure.

Further, FIG. 7 shows the relationship between the remaining amount and the elapsed time based on the difference in ozone concentration. In the figure, the amount of ozone is 0.03
The case of ppm and the case of 0.1 ppm are illustrated, but as is clear from this figure, it is clear that the greater the amount of ozone, the greater the deodorizing effect. Therefore, in this embodiment,
The deodorizing effect is greater when a voltage of 5KV is applied. However, even when a 3.8 KV voltage is applied, it is considered that about 0.1 ppm or more of ozone is generated from the electrostatic filter 16 as described above, so that the deodorizing effect can be obtained. This level is considered to be sufficient as the concentration.

What can be said from the graphs of FIG. 6 and FIG. 7 above is that when the applied voltage of the electrostatic filter 16 is lowered, the amount of ozone generated decreases, and the deodorizing effect is obtained even at an ozone concentration of about 0.1 ppm. You can expect it.

In consideration of the above various characteristics, the air purifier according to the present invention is designed so that when the air purifier is mainly intended to function as a dust collector, that is, when it is in the dust collection mode, A voltage of 5 KV is applied to the filter 16. When such a high voltage is applied, the dust collection efficiency becomes good as shown in FIG. 4, and fine powder particles such as dust existing in the air in the vehicle compartment are efficiently collected and high. Air cleanliness is maintained. On the other hand, the power consumption increases as shown in FIG. Further, as shown in FIG. 6, the amount of ozone generated from the electrostatic filter 16 increases. However, since the air purifier of the present invention is provided with the ozone decomposing catalyst 18 that decomposes ozone, the air discharged from the discharge port 14 contains almost no ozone. Therefore, the discharged air has no ozone odor.

On the other hand, when the air purifier is mainly intended to function as a deodorizer, that is, when the deodorant mode is set, a voltage of 3.8 KV is applied to the electrostatic filter 16. When such a high voltage is applied, the dust collection efficiency decreases as shown in FIG. 4, and it becomes impossible to maintain high air cleanliness. On the other hand, as shown in FIG. 5, power consumption is considerably small. Further, as shown in FIG. 6, the amount of ozone generated from the electrostatic filter 16 is reduced. However, even under such conditions, about 0.1 ppm or more of ozone is generated from the electrostatic filter 16, so that a sufficient deodorizing effect can be obtained. Of course, this ozone is also decomposed by the ozone decomposition catalyst 18,
The air discharged from 14 has no ozone odor. Since the applied voltage is lowered when the deodorizer is functioning as described above, it is possible to save power consumption.

As described above, in the present embodiment, in a normal state in which both the deodorant switch 26 and the automatic mode switch 27 are turned off, a high voltage of about 5 KV from the high voltage generator 32 to the electrostatic filter 16. When the deodorizing switch 26 is turned on by applying a dust collection mode that mainly functions as a dust collector, a high voltage of about 3.8 KV is mainly applied to the electrostatic filter 16 from the high voltage generator 32. It is set to the deodorant mode that functions as a deodorizer. Further, when the automatic mode switch 27 is turned on, the dust collecting mode and the deodorizing mode are alternately switched based on the mode change signal output from the timer unit 30B at a predetermined cycle.

In addition to the operation as described above, a publicly known sensor called an air cleanliness sensor is connected to the control device 22 to collect dust when air cleanliness becomes low and air pollution in the vehicle interior is detected. It is also conceivable to set the mode and control the deodorant mode in other cases. Further, the deodorizing mode may be set when the ignition switch is turned off, and all the functions may be automatically stopped when the battery voltage becomes equal to or lower than a predetermined voltage.

[Effect of device]

As is clear from the above description, according to the air purifier of the present invention, the control means mainly performs the dust collecting voltage for charging dust when performing dust collection and the deodorizing operation during mainly deodorizing. Since the deodorizing voltage for generating the obtained amount of ozone is selectively applied to the dust collecting means, the air purifier has a function as a dust collector and a deodorizer. Can be made. In addition, since deodorizing is performed by utilizing the deodorizing action of ozone generated from the dust collecting means, the deodorizing function does not deteriorate, and when the air purifier functions as a deodorizing device, Power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an air purifier according to the present invention, FIG. 2 is a schematic configuration diagram of a control system of the air purifier according to the present invention, and FIG. 3 is a control unit shown in FIG. A specific circuit diagram of the high-voltage generator, and FIGS. 4 to 7 are diagrams showing general characteristics of the air purifier. 16 ... Electrostatic filter (dust collecting means), 18 ... Ozone decomposing catalyst, 20 ... Fan device, 22 ... Control device (control means), 32 ... High voltage generator (high voltage generator).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-2-35947 (JP, A) JP-A-62-57662 (JP, A) JP-A-3-193150 (JP, A) JP-A-3- 52656 (JP, A) JP 2-83049 (JP, A) JP 64-22363 (JP, A) Actual flat 2-129270 (JP, U) Actual flat 2-8551 (JP, U) Japanese Patent Public Sho 52-25587 (JP, B2) Actual Public Hei 7-21233 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A fan device for introducing air into an air flow path, a dust collecting device for collecting fine particles such as dust existing in the air introduced by the fan device, and ozone generated from the dust collecting device. And an ozone decomposing means for decomposing the gas are respectively provided in the air circulation path, and the fan device and the dust collecting means are connected to a control means for comprehensively controlling these operations, and the control means mainly collects dust. Occasionally, a dust collection voltage for charging dust in the air is generated, and a deodorization voltage lower than the dust collection voltage, which mainly generates an amount of ozone capable of deodorizing when deodorizing, is selectively applied to the deodorizing voltage. An air purifier characterized in that it has a voltage applying means for applying to the dust means, and uses ozone generated by the dust collecting means as deodorizing means.