JPH03143518A - Air cleaner - Google Patents

Abstract

PURPOSE:To display the correct exchanging time of filter a display unit by modifying the measured value of operation time according to the coefficient linked with a change-over switch and determining the arrival of exchanging time of filter. CONSTITUTION:The fan 11 to circulate the room air is driven by a motor 10 of variable speed. The flow rate of the fan 11 is varied by the change-over switch 7, and the dust in the air circulated by the fan 11 is removed by an exchangeable filter 12. The arrival of exchanging time of the filter 12 is displayed by a display unit 9, and the display of the display unit 9 is cancelled by a reset switch 5, and the display of the display unit 9 and the cancellation are controlled by a control means 8. The control means 8 measures the operation time of the motor 10 and carries out the display of the display unit 9 when the integrated measured time obtained by adding up the measured operation time of motor multiplied by the coefficient linked with the change-over switch 7 reaches a specified value, and the display of the display unit 9 is cancelled by the operation of the switch 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air cleaning device, and more particularly, to an air cleaning device having an indicator indicating that it is time to replace a filter.

[Conventional technology]

In recent years, there has been an increasing demand for air purifiers that remove, sterilize, and deodorize airborne dust, airborne microorganisms, cigarette smoke, etc. contained in indoor air, and keep indoor air clean.

7 and 8 are, for example, Utility Model Application No. 56-45734
FIG. 1 is a perspective view and a vertical sectional view showing this type of air cleaning device disclosed in the publication. The configuration of a conventional air cleaning device a will be explained with reference to the same figure. 1 is a front panel, 2 is an intake grill provided on the front panel 1, 3 is an outlet grill, 4 is a control switch panel for operating the air purifier a, 5 is a reset switch, and 10 is a drive for driving the fan 11. The motor 12 is a filter replaceably mounted on the side of the suction grille 2.

FIG. 3 is an enlarged view of the control switch panel 4, in which 6 is a power switch, 7a to 7d are changeover switches that change the air volume of the fan 11, and change the rotational speed of the motor 10. Reference numeral 9 is an indicator indicating that it is time to replace the filter 12.

FIG. 4 is an enlarged view of the reset switch portion, and when the reset switch 5 is pressed, the display on the display 12 can be canceled.

FIG. 5 is an electric circuit block diagram of the air cleaning device a. In the figure, reference numeral 8 denotes a control means for controlling display and cancellation of the display 9, and a reset switch 5. In response to signals from the power switch 6 and the changeover switch 7, the rotational speed of the motor 10, the display and cancellation of the display 9, and the integrated time measurement for this purpose are controlled. Then, a TL source switch 6, a reset switch 5. An input circuit 8a that receives signals from the changeover switch 7, a central control unit 8c (hereinafter referred to as CPU) that processes the signals manually input to the input circuit 8a, a memory 8b that stores various information, and a clock that measures operating time. and an output circuit 8e that outputs an output to the motor 10° indicator 9 based on the arithmetic processing result from the CPU 8C.

Next, the operation of the air cleaning device a configured as above will be explained. , when the power switch 6 of the control switch panel 4 is turned on and the changeover switches 7a to 7d are set, the air circulation fan 11 is activated by the motor 10 to turn on the changeover switch 7.
It is driven at a speed corresponding to the setting states a to 7d. Thereby, indoor air is taken into the main body from the suction port 2 and passes through the filter 12. At this time, the dirty air taken into the room is filtered! 2 removes dust and deodorizes the air, resulting in clean air.

This purified air is returned to the room through the Suita grill 3. The above purifying action acts on the circulating indoor air, and the indoor air is purified. And a filter! 2 gradually becomes dirty, its cleaning ability decreases, and the time comes when the filter needs to be replaced.

Next, the operation of displaying the indicator 9 to indicate that it is time to replace the filter 12 will be explained with reference to the flowchart of FIG. When the power switch 6 is turned on, the motor 10 and the control means 8 are started, and when the person of the TEN switch 6 is determined in step S1, the memory 8b is turned on in step S2.
70, which is the accumulated usage time of the filter 12 written and stored in the memory. Next, the process advances to step S3, and the accumulated usage time of the filter 12 read in step S2 is compared with a predetermined time, for example, 1000 hours, and if it is less than that, the process advances to step S4,
．． When 1. is elapsed, the process proceeds to step S5, and the time 1. which passed in step S4 is added to the usage H4 calculation time t0 of the filter 12 read in step S2. , and the new accumulated usage time t.

Calculate. Proceeding to step S6, the accumulated usage time calculated in step S5 is written and stored in the memory 8b. Then return to the start and repeat.

In step S3, the accumulated usage time of the filter 12 read from the memory 8b is compared with a predetermined time, for example 1000 hours, and if it exceeds, step S7
Then, the display 9 is turned on to indicate that it is time to replace the filter.

When the user replaces the filter 12 and presses the reset switch 5 in step S8, the process proceeds to step S9, where the display on the display 9 is canceled and the filter 12 written in the memory 8b is
Accumulated usage time t. Erase the memory of and reduce it to zero. If the reset switch 5 is not pressed in step S8,
The display on the display 9 continues to prompt the user to replace the filter 12.

[Problems to be Solved by the Invention] Since the conventional air purifying device is configured and operates as described above, the filter 12 is free from dust and dirt as the air purifying device operates.
When the ability to collect malodorous components, sterilization, etc., and reach the limit of dust collection and deodorization, the filter 12 needs to be replaced with a new one. The increase in contamination of the filter 12 and the decrease in capacity progress depending on the amount of air passing through the filter 12.
By calculating the degree of contamination of the filter 12, the degree of contamination of the filter 12 is estimated, and the time for replacement is displayed. However, since the amount of air passing through the filter 12 per unit time, that is, the speed of the processed air, varies depending on the selection of the changeover switch 7, even if the operating time of the device reaches the set time and the display 9 shows the If the amount of air that has passed through the filter 12 and is processed is less than the expected amount, the filter 12 still has sufficient capacity, and conversely, even if the expected air processing amount has been reached, it will not be displayed and the cleaning capacity will not be displayed. There was a problem in that the vehicle continued to be operated with deteriorated condition.

This invention was made to solve the above-mentioned problems, and allows for more accurate filter replacement timing by taking into account the amount of air passing through different filters per vomiting time by selecting a changeover switch. The object of the present invention is to provide an air purifying device that displays the following information.

[Means to solve the problem]

Therefore, the air purifying device according to the present invention includes a fan that circulates indoor air, a variable speed motor that drives the fan, and a switch that changes the air volume of the fan.
A replaceable filter that removes dust from the air circulated by the fan, an indicator that indicates that it is time to replace the filter, a reset switch that cancels the display on the display, and a control for displaying and canceling the display on the display. An air purifying device comprising: a control means for measuring the operating time of the motor, and multiplying the time value by a count linked to the switching of the changeover switch to calculate an accumulated time. The above object is achieved by a configuration characterized in that when the time reaches a predetermined value, the display is displayed, and when the reset switch is actuated, the display is canceled.

[Effect]

With the above configuration, the variable speed motor drives the fan, the fan circulates indoor air, and the replaceable filter removes dust from the circulating air. Note that the air volume of the fan can be changed using a changeover switch.

The control means measures the operating time of the motor,
The time value is multiplied by a count linked to the switching of the changeover switch to calculate the cumulative total time, and when the value reaches a predetermined value, the display indicates the time to replace the replaceable filter. It marks the arrival of Furthermore, when the reset switch is activated, the display on the display is canceled.

(Example〕 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an air purifying device A according to an embodiment, and FIG. 2 is a longitudinal cross-sectional view of the same. Portions that are the same as or correspond to those of the conventional example are designated by the same reference numerals and redundant explanation will be omitted. Fig. 3 is an enlarged view of the control switch panel, Fig. 4 is an enlarged view of the reset switch section, and Fig. 5 is an electric circuit block diagram of air purifier A. These are also used in the conventional example and have already been explained, so redundant explanation will be omitted. Omitted.

As a supplementary explanation, in this embodiment, the fan 11 is driven in order to change the air volume of the fan 11 that circulates indoor air in response to the volume of the room to be cleaned, the level of air pollution, and other user requests. A variable speed motor 10 is used as the motor, and the air volume of the fan 11 can be varied in four stages by changing the fan rotation speed using changeover switches 7a to 7d.

The filter 12 that removes dust from the indoor air circulated by the fan 11 is replaceable, and the indicator 9 lights up to indicate that it is time to replace it.

Further, after replacement, the reset switch 5 can be pressed to operate and the display on the display 9 can be canceled.

Next, the operation of the control means 8, which is a feature of the present invention, will be explained with reference to the flowchart shown in FIG. When the power switch 6 is turned on, the motor 10 and the control means 8 are started, and first, in step S1, the person who has turned on the power switch 6 is determined, and in step S2, the operating state is corrected based on the operating state written and stored in the memory 8b. Read to, which is the cumulative time. Next, the process advances to step S3, and the cumulative time t read in step S2. is compared with a predetermined time, for example, 1000 hours, and if it is less than that, the process proceeds to step S4, and time 1. When the period has elapsed, the process proceeds to step S5, and the state of the changeover switch 7 is determined.

If the selector switch is "weak" 7a, the process advances to step S6, and the time 1. after step S4 has elapsed. switch 7a
-7d is multiplied by a coefficient set, for example, 0.6, to calculate the time t2 corrected according to the operating conditions. If the changeover switch is set to "Medium J7b" instead of "1 Weak" 7a, the process proceeds from step S5 to step S10, and the measured time t2 corrected in step Sll is calculated. That is,
Step SS, Step S10. Step S12. In step S14, the switching states of the changeover switches 7a to 7d are determined, and in step S6. Step S11゜Step S
13. Proceed to step S15 and select switch 7.
Coefficients linked to a to 7b, e.g. 0.6, 1.0, 1
．． The corrected time t2 is calculated by multiplying the time t elapsed in step S4 by 4.1.8. Then, the process proceeds to step S16, and a new cumulative time to is calculated by adding the corrected time t2 calculated in each of the above steps to the time 0 read in step S2.

In step S17, the cumulative time t calculated in step S16 is calculated. is written and stored in the memory 8b. Then return to the start and repeat.

In step S3, the cumulative time t of the filter 12 is read from the memory 8b. is compared with a predetermined time, for example 1000 hours, and if it exceeds, step S7
Then, the display screen 9 is turned on to indicate that it is time for replacement. When the user replaces the filter 12 in step S8 and presses the reset switch 5 to activate it, step S9
, the display on the display 9 is canceled and the accumulated time t written in the memory 8b is displayed. Erase the memory of and reduce it to zero. In step S8, if the reset switch 5 is not pressed, the display 9 continues to be lit to prompt the user to replace the filter 12.

Note that the ratio between the coefficients linked to the changeover switches 7a to 7d is determined to approximately correspond to the ratio of the amount of processed air that passes through the filter 12 per unit time when operating with each changeover switch.

〔Effect of the invention〕

As explained above, according to the present invention, the time for filter replacement is determined and displayed on the display based on the cumulative time that is accumulated by correcting the time value of the operating time using the coefficient linked to the changeover switch. , Also, since the display is canceled by operating the reset switch, simply operate h:
This solves the problem with the conventional example of determining when to replace the air by simply calculating the amount of air between r and the amount of air that the filter cleans, even if the fan air volume is changed. It is possible to automatically calculate the clocked time and display the arrival of replacement time, and it is possible to provide an air purifying device that allows the filter to be replaced at an appropriate time that corresponds to the actual usage of the air purifying device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of the embodiment, FIG. 3 is an enlarged view of the control switch panel of the embodiment and the conventional example, and FIG. 4 is an enlarged view of the embodiment and the conventional control switch panel. FIG. 5 is an electric circuit block diagram of the embodiment and the conventional example; FIG. 6 is a flowchart showing the operation of the embodiment; FIG. 7 is a perspective view of the conventional example; FIG.
The figure is a longitudinal sectional view of the conventional example, and FIG. 9 is a flowchart showing the operation of the conventional example. A --- Air purifying device a of one embodiment --- Conventional air purifying device 4 --- Control switch panel 5 --- Reset switch 6 --- Power switches 7a to 7d. -All changeover switch 8--Control means 8a--Input circuit 8b=--Memory 8c==CPU 8d---Timer 8e---Output circuit 9---Display 1 0.-・-Motor 1・=-Fan 2--------Filter Note that the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] A fan that circulates indoor air, a variable speed motor that drives the fan, a switch that changes the air volume of the fan, a replaceable filter that removes dust from the air that is circulated by the fan, and replacement of the filter. An air purifying device comprising: a display indicating that the time has come; a reset switch for canceling the display on the display; and a control means for controlling display and cancellation of the display, the control means comprising: ,
When the cumulative running time of the motor reaches a predetermined value by counting the operating time of the motor and multiplying the clock value by a count linked to the switching of the changeover switch, the display is displayed and the reset switch is turned on. An air purifying device characterized in that the display on the display device is canceled when activated.