JPH11268528A - Filter replacement time display circuit of air cleaner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely detect the degree of contamination of a filter unit by integrating in a nonvolatile memory the fan driving time only when an actuator for operating a switching door for selectively switching an air current toward a filter unit or an exhaust port is in the filter unit ventilating mode. SOLUTION: A sensor for detecting whether a switching door 10 is in an inside air circulating mode or an exhaust mode is built in a case forming an actuator for switching a switching door 10. The cumulative time when the switching door 10 is in the inside air circulating mode for blowing air to a filter unit 9 and a fan motor 13 is driven is stored in a nonvolatile memory. When the cumulative time reaches a set time, a warning is given from an alarm device. By this arrangement, the driving time of the fan motor 13 when air is blown to the filter unit 9 is integrated, so that the degree of contamination of the filter unit 9 with the driving cumulative time of the fan motor 13 can be grasped effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter replacement time display circuit for accurately displaying a filter replacement time of a vehicle air purifier having a filter unit such as a dust collecting filter and a deodorizing filter.

[0002]

2. Description of the Related Art In vehicles such as automobiles, as a means for purifying air in the cabin, for example, in a vehicle having a trunk lid, for a vehicle of a stationary type mounted on a rear parcel shelf. There are various types of air purifiers, such as air purifiers or trunk built-in type vehicle air purifiers buried in the rear parcel shelf, and built-in type vehicle air purifiers installed between the inner and outer panels of the vehicle. A vehicle air purifier is known.

[0003] Each of the above-mentioned types of vehicle air purifiers is provided with a filter unit for deodorizing and / or purifying and discharging the inhaled air. For example, the vehicle air purifier 1 shown in FIGS. 2 and 3 is a built-in type installed in a space between an inner panel 2 and an outer panel 3 of an automobile. Inside the case 7 having the port 4, the air outlet 5 and the exhaust port 6, the fan 8 approaching the intake port 4, the filter unit 9 approaching the exhaust port 5, and further approaching the exhaust port 6. Switching doors 10 are provided, and the fan 8 is closed with the exhaust port 6 closed by the switching door 10.
Is driven, the air in the passenger compartment is purified by the circulation path of the intake port 4, the filter unit 9, and the exhaust port 5. If the fan 8 is driven by opening the exhaust port 6, the air in the passenger compartment is discharged between the inner panel 2 and the outer panel 3 via the intake port 4 and the exhaust port 6. The air discharged between the outer panel 3 and the drafter 11 provided on the outer panel 3
After that, it is exhausted to the outside of the car. Reference numeral 12 denotes an actuator for opening and closing the switching door 10.

As described above, in a vehicle air purifier provided with the filter unit 9 for collecting dust, deodorizing, etc., the driving time (operating time) in which the filter unit 9 of the vehicle air purifier is used. As the length of the filter unit 9 increases, the contamination of the filter unit 9 progresses. As the frequency of use of the filter unit increases, the function of the filter unit decreases. Therefore, in the conventional vehicle air purifier, the operating time of the fan 8 is integrated in a non-volatile memory, and when the fan operating time reaches a preset time, a display is displayed and a filter unit is displayed. A filter unit replacement time detecting means for notifying the replacement time is employed.

[0005]

However, with such a filter unit replacement time detecting means, it is impossible to replace the filter unit 9 appropriately in accordance with the degree of contamination of the filter unit 9. In other words, the driving of the fan 8 is irrelevant to the use of the filter unit 9. For example, when the exhaust port 6 is opened by the intake door 8, the fan 8 operates without using the filter unit 9. Fan 8
Is not proportional to the degree of contamination of the filter unit 9. Therefore, the filter unit 9 can be operated by the operation time of the fan.
Was poorly qualified to determine the degree of contamination of

The present invention has been made in view of the above. In a vehicle air purifier equipped with a filter unit, the operation time of the fan only during the air cleaning by the filter unit is detected, and the operation of the filter unit is performed. It is an object of the present invention to provide a display circuit for a filter replacement time capable of appropriately detecting the degree of contamination.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, according to the present invention, an air flow is generated from an intake port to an exhaust port in a case having an intake port, an exhaust port, and an exhaust port. And a filter unit disposed in an air passage between the fan and the air outlet, and a filter unit disposed between the filter unit and the fan to reduce an airflow generated by a driving force of the fan. A switching door for selectively switching to a direction or an exhaust port direction, and a vehicle air purifier having an actuator for operating the switching door; a switching door detecting means for detecting that the actuator is in a filter unit ventilation mode; Fan drive detection means for detecting when the fan is driven, wherein the switching door detection means causes the actuator to operate in a filter unit ventilation mode. The fan drive time of only a certain time,
It is characterized by a filter replacement time display circuit of a vehicle air purifier having a control circuit for integrating in a nonvolatile memory and an alarm circuit for generating an alarm when an integrated value in the nonvolatile memory reaches a set value.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the drawings.

The configuration of the vehicle air purifier according to the present embodiment is the same as that of the conventional vehicle air purifier shown in FIGS. 2 and 3. Omitted.

In this embodiment, the vehicle air purifier 1 is used.
In addition, the following control circuit and alarm are provided. That is, a sensor (not shown) for detecting whether the switching door 10 is in the internal air circulation mode (actuator output) or the exhaust mode (actuator output) is provided inside the case forming the actuator 12. ing. When the switching door 10 is in the inside air circulation mode (when the filter unit is ventilated),
Is provided with a non-volatile memory (not shown) for storing the accumulated time when the device is driven.

Further, an alarm device (not shown) for issuing an alarm when the accumulated time reaches a set time value is provided.

Next, the operation of the vehicle air purifier will be described with reference to the flowchart shown in FIG.

When the power switch 14 of the vehicle air purifier 1 is turned on, the fan motor 13 is driven. At this time, the open / close position of the switching door 10 is detected by an output signal from the actuator 12, and the switching door 10 If the exhaust port 6 is closed, the actuator output is output.

When the actuator output is output when the fan motor 13 is driven, the drive time of the fan motor 13 is not integrated.
When the actuator output is output when the fan motor 13 is driven, the drive time of the fan motor 13 is sequentially accumulated in the nonvolatile memory 15.

The accumulated time T1 of the nonvolatile memory 15 is
When the set time T has not been reached, the drive time of the fan motor 13 is sequentially accumulated in the non-volatile memory 15 only when the actuator output is being output, and when the accumulated time T1 becomes longer than the set time T, the filter unit is activated. A maintenance display output of 9 is generated, and the alarm 16 operates.

The user of the vehicle air purifier is informed of the replacement time of the filter unit 9 based on the alarm. If the replacement of the filter unit 9 is performed, the nonvolatile memory 15 is cleared by the operation of the reset switch 17. At the same time, the operation of the alarm 16 is stopped, and the accumulation of the drive time of the fan motor 13 is started only when the actuator output is output again.

As described above, in the present embodiment, the driving time of the fan motor 13 during ventilation to the filter unit 9, that is, at the time of air cleaning using the filter unit 9 is integrated. It is possible to effectively grasp the degree of contamination of the filter unit 9 due to the accumulated driving time.

[0018]

As described above, according to the present invention, the degree of contamination of the filter unit 9 can be properly detected in proportion to the drive time of the fan motor, and the filter is activated by the alarm. When the unit is contaminated, an alarm for replacing the filter unit can be properly issued.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an embodiment of a filter replacement time display circuit according to the present invention.

FIG. 2 is a sectional view showing a configuration of a vehicle air purifier.

FIG. 3 is an external view of the vehicle air purifier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Air purifier for vehicles 2 ... Inner panel 3 ... Outer panel 4 ... Intake port 5 ... Exhaust port 6 ... Exhaust port 7 ... Case 8 ... Fan 9 ... Filter unit 10 ... Switching door 11 ... Drafter 12 ... Actuator 13 ... Fan Motor 14 Power switch 15 Non-volatile memory 16 Reset switch 17 Reset switch

Claims (1)

[Claims] 1. A case (7) having an intake port (4), an exhaust port (5) and an exhaust port (6) is provided from an intake port (4).
A fan (8) for generating an air flow toward the air outlet (5), and a filter unit (9) disposed in an air passage between the fan (8) and the air outlet (5). Disposed between the filter unit (9) and the fan (8) to selectively generate airflow generated by the driving force of the fan (8) toward the filter unit (9) or the exhaust port (6). In a vehicle air purifier having a switching door (10) for switching and an actuator (12) for operating the switching door (10), switching door detecting means for detecting that the actuator (12) is in a filter unit ventilation mode. And fan drive detection means for detecting when the fan is driven, wherein the switching door detection means allows the fan drive time only when the actuator is in the filter unit ventilation mode. , Filter replacement timing display circuit of the vehicle air cleaner characterized by having an alarm circuit allowed to generate an alarm and the integrated value of the control circuit and nonvolatile memory allowed to integration in the non-volatile memory reaches a set value.