JPH04317717A - Air cleaner - Google Patents

Abstract

PURPOSE:To control the revolution number of an electric motor according to the number of output pulses from an ultraviolet ray detecting part in order to realize an automatic operation of an air cleaner which affords a nearly realistic fresh air effect to the user. CONSTITUTION:An air cleaner which comprises a driving part 3 for driving an electric motor 2, an ultraviolet ray detecting part 4 for detecting ultraviolet rays, a counter part 10 for counting the number of times when the ultraviolet ray detecting part 4 detects such rays, a reference clock generating part 11 for producing an appropriate pulse of timing signal and a control part 12 for controlling the revolution number of the electric motor 2 by receiving an outlet from the counter part 10, whereby the revolution number of the electric motor 2 is controlled according to the number of output pulses from the ultraviolet ray detecting part 4.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner with an automatic operation mode that detects air pollution around the main body of the device and controls its operation.

0002

2. Description of the Related Art Conventionally, this type of air cleaner has generally had a configuration as shown in FIG. The configuration will be explained below.

As shown in the figure, an electric motor 2 is provided in a device body 1, and a drive section (bidirectional thyristor) 3 drives the electric motor 2.
to drive. The ultraviolet light detection section 4 detects ultraviolet light and inputs its output to the first signal processing section 5. The gas detection section 6 detects gas around the device main body 1 and inputs it to the second signal processing section 7 . The control unit 8 controls the first and second signal processing units 5
, 7 and the output of an operation setting section 9 through which the user sets the operating state are input, and the operation of the drive section 3 is controlled by the outputs.

To explain the operation of the above configuration, the gas detection section 6 detects the gas concentration around the device main body 1,
As shown in FIG. 6, automatic operation was performed by switching the rotation speed of the electric motor 2 depending on the concentration level. Further, the ultraviolet detecting section 4 detects, for example, the ignition of a cigarette, and after the start of smoking, starts operation at a provisional air volume regardless of the concentration of cigarette smoke.

[0005]

[Problems to be Solved by the Invention] In such a conventional air purifier, the gas components in the room detected by the gas detection unit 6 are mainly diffused from the smoker, that is, the gas generation source, and are absorbed by the gas detection unit. This system detects objects that come close to air cleaner 6, and because the gas diffuses slowly under normal conditions, there is a problem that the cleaning operation timing deviates from what users expect from an air cleaner. In addition, the ultraviolet detection section 4
Detects the ignition of a cigarette and starts operation at a provisional air volume after smoking starts, regardless of the concentration of the cigarette, resulting in a discrepancy between the user's experience and the actual air volume, especially in the early stages of automatic operation, and in the later stages of operation. It was noticeable about time.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an air purifier control device that performs operation more realistically throughout automatic operation.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an electric motor, a drive section for driving the electric motor, an ultraviolet detection section for detecting ultraviolet rays, and an ultraviolet ray detection section for detecting ultraviolet rays. a counter unit that counts the number of times the motor is rotated; a reference clock generator unit that generates pulses of an appropriate timing signal; and a control unit that receives the output of the counter unit and controls the rotation speed of the electric motor. It is used as a means of solving problems.

[0008] Furthermore, in place of the control unit of the first problem solving means, an operation time control unit for controlling the operation time of the electric motor is provided, and the operation time control unit controls the operation time of the electric motor based on the output of the counter unit. This is the second problem-solving method.

[0009]

[Operation] The present invention has the above-mentioned first problem solving means.
When the ultraviolet light detection section detects the ignition of a cigarette, which is the start of smoking, the output pulse signal of the ultraviolet light detection section is input to the subsequent counter section, the number of pulses is accumulated, and the number of pulses is determined as appropriate by the reference clock generation section. The electric motor can be controlled at a rotation speed corresponding to the amount of smoked by using the accumulated count value over a certain period of time as the amount of smoked.

[0010] According to the second problem solving means, when the ultraviolet light detection section detects the ignition of a cigarette, which is the start of smoking, the output pulse signal of the ultraviolet light detection section is inputted to the subsequent counter section, and the pulse signal is The motor can be operated at a constant rotational speed and for an operating time corresponding to the size of the smoked amount by integrating the number of smoked smokers and using the integrated count value in a certain period of time appropriately determined by the reference clock generating section as the amount of smoking.

[0011]

Embodiment An embodiment of the present invention will be described below with reference to FIG. Note that components having the same configuration as those of the conventional example are given the same reference numerals, and the description thereof will be omitted.

As shown in the figure, a counter section 10 counts the number of times that ultraviolet light is detected by the ultraviolet light detection section 4. The reference clock generator 11 generates a reference clock at each reference time. The control section 12 receives the output of the counter section 10 at the reference time of the reference clock generation section 11 as an input, and controls the rotation speed of the electric motor 2 via the drive section 3 .

The operation of the above configuration will be explained with reference to FIGS. 2(a) to 2(d). Ultraviolet rays are emitted during one pulse (reference time) of the reference clock of the reference clock generator 11 as shown in FIG. 2(a). From the detection unit 4, as shown in Fig. 2(b),
When three output pulses are generated, the output of the counter section 10 becomes as shown in Fig. 2(c), and the control section 12 determines that the room is very dirty and raises the electric motor 2 as shown in Fig. 2(d). Operate with strong rotation. Also, during one pulse (reference time) of the reference clock of the reference clock generator 11, one pulse is output from the ultraviolet detector 4.
When the ultraviolet rays are generated, the output of the counter section 10 becomes as shown in FIG. When the number of output pulses from 4 is 0, the operation of the electric motor 2 is stopped.

As described above, according to the air purifier of the embodiment of the present invention, the amount of smoked is detected using the ultraviolet detection section 4,
Depending on the size, the rotational speed of the electric motor 2, that is, the strength of the operation, can be switched, and while taking advantage of the quick response of the ultraviolet detection section 4, it is possible to realize automatic operation that is more realistic for the user. Note that, as in the above embodiment, by inputting the output of the counter section 10 to the control section 12 and simultaneously inputting the output of the reference clock section 11 to the control section 12, the output of the counter section 10 and the reference clock can be synchronized. This can improve detection accuracy.

Next, another embodiment of the present invention will be described with reference to FIG. Components having the same configuration as those in the above embodiment are given the same reference numerals and explanations will be omitted.

As shown in the figure, the operation time control section 13 controls the counter section 1 at the reference time of the reference clock generation section 11.
The output of 0 is input, and the operating time of the electric motor 2 is controlled via the drive section 3.

The operation of the above configuration will be explained with reference to FIGS. 4(a) to 4(d). Ultraviolet rays are emitted during one pulse (reference time) of the reference clock of the reference clock generator 11 as shown in FIG. 4(a). From the detection unit 4, as shown in Fig. 2(b),
When three output pulses are generated, the output of the counter section 10 becomes as shown in Fig. 2(c), and it is judged that the room is very dirty, so the operating time control section 13 sets the operating time as shown in Fig. 2(d). is set to a large value, and the electric motor 2 is driven via the drive unit 3. Also, during one pulse (reference time) of the reference clock of the reference clock generator 11, one pulse is output from the ultraviolet detector 4.
When the dirt is generated, the output of the counter section 10 becomes as shown in FIG. Furthermore, when the number of output pulses from the ultraviolet detection section 4 is 0,
Stop the operation of electric motor 2.

As described above, the air purifier according to the embodiment of the present invention operates faster than automatic operation based on the detection of gas generated as a result of smoking, and moreover, it detects the amount of smoked smoke and operates according to the size of the smoke. By setting the time, it becomes possible to realize automatic driving that is more realistic for the user.

[0019]

As is clear from the above embodiments, according to the present invention, an electric motor, a drive section for driving the electric motor,
an ultraviolet detection section that detects ultraviolet rays; a counter section that counts the number of times that ultraviolet rays are detected by the ultraviolet detection section;
Since it is equipped with a reference clock generation section that generates pulses of an appropriate timing signal, and a control section that uses the output of the counter section as input to control the rotation speed of the motor, the number of output pulses of the ultraviolet detection section within the reference time can be adjusted. The amount of smoked can be detected, and the number of rotations of the electric motor, that is, the intensity of operation, can be controlled according to the amount of smoked smoke, making it possible to realize automatic driving that is more realistic for the user.

Furthermore, in place of the control section, an operation time control section is provided for controlling the operation time of the electric motor, and the operation time control section controls the operation time of the electric motor based on the output of the counter section. The amount of smoked can be detected by the number of output pulses from the ultraviolet detector inside the device, and the driving time can be set according to the amount of smoke, making it possible to realize automated driving that is more realistic for the user.

[Brief explanation of drawings]

[Fig. 1] Block diagram of an air cleaner according to an embodiment of the present invention

[
Figure 2: (a) to (d) Timing chart for explaining the operation of the air purifier

[Fig. 3] Block diagram of an air cleaner according to another embodiment of the present invention

[Figure 4] (a) to (d) Timing chart for explaining the operation of the air purifier

FIG. 5 is a block diagram of a conventional air purifier.

[Figure 6] (a) (b) Timing chart for explaining the operation of the air purifier

[Explanation of symbols]

2　Electric motor 3 Drive section 4 Ultraviolet detection part 10 Counter section 11 Reference clock generation section 12 Control section

Claims (2)

[Claims] 1. An electric motor, a drive section that drives the electric motor, an ultraviolet detection section that detects ultraviolet light, a counter section that counts the number of times that ultraviolet light is detected by the ultraviolet detection section, and pulses of an appropriate timing signal. An air purifier comprising: a reference clock generation section that generates a reference clock; and a control section that receives an output from the counter section and controls the rotation speed of the electric motor. 2. The electric motor according to claim 1, further comprising an operation time control section for controlling the operation time of the electric motor in place of the control section, and the operation time control section controls the operation time of the electric motor based on the output of the counter section. air purifier.