KR100912528B1 - Method of controlling air cleaner for vehicles - Google Patents

Abstract

The present invention reads pollution measurements from an air-pollution detector for a vehicle air purifier having a controller for controlling a blower motor by receiving a signal from an air-pollution detector, a blower, a blower motor, and an air-pollution detector. And a driving step of controlling the blower motor according to the comparison step, and a comparison step of comparing the read contamination level measurement value with the reference value. Here, the upward reset step and the downward reset step are further included. In the upward resetting step, if the contamination degree reading read in the reading step is larger than the reference value, the upward adjustment value is added to the reference value to reset the reference value. In the downward resetting step, if the contamination degree reading read in the reading step is less than the reference value, the reference value is reset by subtracting the downward adjustment value from the reference value.

Description

Method of controlling air cleaner for vehicles}

1 is a block diagram showing a control system of a vehicle air cleaner for performing the control method of the present invention.

FIG. 2A is a flowchart illustrating a method for controlling a reference value of the present invention performed by the micro-controller of FIG. 1.

FIG. 2B is a flow chart showing the rotational force control method of the present invention performed by the micro-controller of FIG.

<Explanation of symbols for the main parts of the drawings>

M ... blower motor, SS ... air-pollution detector,

10 ... micro-controller.

The present invention relates to a control method of a vehicle air purifier, and more particularly, to a vehicle having a controller for controlling a blower motor by receiving a signal from an air-pollution detector, a blower, a blower motor, and an air-pollution detector. It relates to a method of controlling an air cleaner.

A control method of a conventional vehicle air purifier, for example, according to the Republic of Korea Patent Publication No. 1068 of 1998, the pollution degree measurement from the air-pollution detector is compared with a constant reference value to simply control the rotational force of the blower motor.

However, in the case of air-contamination detectors of the same model, there is a deviation in the internal resistance value, the response speed of the air-contamination detectors may be low, and an instantaneous error signal may be output from the air-contamination detectors. Therefore, according to the conventional control method of simply comparing and controlling the pollution degree measurement from the unstable air-pollution sensor as described above, there is a problem that the control response of the air cleaner to the pollution degree of the air in the vehicle is deteriorated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a control method of a vehicle air cleaner which can improve the control responsiveness of the air cleaner to the pollution degree of air in the vehicle even if the reliability of the pollution degree measurement from the vehicle air-pollution detector is low.

According to an aspect of the present invention, there is provided a vehicle air purifier having a controller for controlling a blower motor by receiving a signal from an air-pollution detector, a blower, the blower motor, and the air-pollution detector. A readout step of reading the contamination level measurement from the pollution detector, a comparison step of comparing the readout pollution level measurement with a reference value, and a driving step of controlling the blower motor according to the comparison result in the comparison step. Control method. Here, the upward reset step and the downward reset step are further included.
In the upward resetting step, if the pollution degree reading read in the reading step is larger than the reference value, an upward adjustment value is added to the reference value to reset the reference value.
In the downward resetting step, if the contamination degree reading read in the reading step is less than the reference value, the downward adjustment value is subtracted from the reference value to reset the reference value.

According to the control method of the present invention, since the pollution degree measurement value is compared by the reference value reset according to the pollution degree measurement value, the air to the pollution degree of air in the vehicle even if the reliability of the pollution degree measurement value from the air-pollution detector is low. Can improve the control response of the purifier.

Hereinafter, preferred embodiments according to the present invention will be described in detail.

Referring to FIG. 1, a ventilation control system of a vehicle for performing a control method of the present invention includes a micro-controller 10, a user input unit 11, and an E.P. rom 12. ), An ambient temperature detector 13, a motor drive circuit 14, a motor M for the blower, a drive current detector 15, an air-contamination detector SS and an interface circuit 16.

The user input unit 11 generates operation mode data according to a user's manipulation and inputs the generated mode data to the micro-controller 10. This operation mode data includes low speed mode data, high speed mode data, and automatic mode data.

The micro-controller 10 inputs a low speed torque signal to the drive circuit when the low speed mode data is input from the user input unit 11, and inputs a high speed torque signal to the drive circuit when the high speed mode data is input, and the automatic mode data. If is input, the algorithm of FIG. 2 is executed.                     

E.P.Rom 12 stores reference value data to be used for the execution of step S2 in the algorithm of FIG.

The motor drive circuit 14 converts the rotational force signal of the pulse width modulation type from the micro-controller 10 into a voltage signal and applies it to the motor M for the blower. The drive current detector 15 detects a drive current flowing through the motor M for the blower through the motor drive circuit 14 and inputs the result data to the micro-controller 10. Accordingly, the micro-controller 10 can grasp the current driving state of the blower motor M, and in particular, is used for the execution of step S12 in the algorithm of FIG. On the other hand, the interface circuit 16 interfaces and inputs the measurement signal from the air-pollution detector SS to the micro-controller 10.

The ambient temperature detector 13 measures the temperature in the vehicle and inputs the measured temperature data to the micro-controller 10. Accordingly, the pollution degree can be adjusted according to the ambient temperature so that the temperature characteristic of the air-contamination detector SS can be compensated.

1, 2A and 2B, the control method according to the present invention includes read (S3b), compare (S4), reset (S5, S6), drive (Fig. 2B) and repeat (return operation) steps. In the reading step S3b, the pollution degree measurement from the air-pollution detector SS is read. In the comparison step S4, the read contamination level measurement value is compared with the reference value. In the reset steps S5 and S6, the reference value is reset so as to be proportional to the read contamination level measurement. In the driving step (FIG. 2B), the driving circuit is controlled in accordance with the comparison result in the comparing step S4 to drive the blower motor M. FIG. In the repetition step, the above steps are repeatedly performed.                     

Referring to FIGS. 1 and 2A, the reference value control method of the present invention performed by the micro-controller 10 of FIG. 1 is sequentially described as follows.

First, after the start, three minutes have elapsed as the initial preheating time T1 (step S1), so that the air-contamination detector SS can make a more accurate measurement on the initial temperature.

Next, after the read waiting time T2 has elapsed (step S2), the pollution degree measurement from the air-pollution detector SS is read (step S3). Here, the read waiting time T2 immediately before the pollution degree measurement from the air-pollution detector SS is first read is set to 3 minutes. Next, the read contamination level measurement value and the reference value are compared (step S4).

Subsequent reset steps S5 and S6 include an upward reset step S6 and a downward reset step S5. In the comparison step S4, if the read contamination level value is larger than the reference value, the upward reset step S6 is performed, otherwise the downward reset step S5 is performed.

In the upward resetting step S6, if the read contamination level value is larger than the reference value, an upward adjustment value is added to the reference value to reset the reference value. Thus, since the reference value is reset in proportion to the pollution degree measurement, even if the reliability of the pollution degree measurement from the air-pollution detector SS is low, the control response of the air cleaner to the pollution degree of the air in the vehicle can be improved. In addition, the read waiting time T2 is reset to the same or shorter first time T2 '. For example, if the initial read waiting time T2 is three minutes, the first time T2 'is set to two minutes. Here, the reason that the read waiting time T2 is reset to the first time T2 'is to prevent malfunction due to the simple disturbance since a simple disturbance of the pollutant measurement occurs when the pollutant measurement value rises. . However, depending on the situation, the read waiting time T2 and the first time T2 'may be set to the same time, for example, 3 minutes. When the upward reset step S6 is performed, the flow returns to the step S2, and the first time T2 'is applied in the subsequent step S2.

In the downward resetting step S5, if the read contamination level is less than or equal to the reference value, the downward adjustment value is subtracted from the reference value to reset the reference value. Thus, since the reference value is reset in proportion to the pollution degree measurement, even if the reliability of the pollution degree measurement from the air-pollution detector SS is low, the control response of the air cleaner to the pollution degree of the air in the vehicle can be improved. Further, the read waiting time T2 is reset to a second time T2 &quot; shorter than the first time T2 ', for example, 4 seconds. Here, the read waiting time T2 is reset to the first time T2. The reason for resetting to the second time T2 &quot; shorter than ') is to reduce the pollution in the vehicle more quickly and to a higher degree while changing the reference value more quickly. When the downward reset step S5 is performed, the flow returns to the step S2, and the second time T2 " is applied in the subsequent step S2.

In the upward reset step S6 and the downward reset step S5, the upward adjustment value is set larger than the downward adjustment value. For example, if the upward adjustment value and the downward adjustment value are expressed as a rate of increase of voltage with respect to time, an upward ratio (250 mV / 2 minutes) of 250 millivolts (mV) to 2 minutes is applied to the upward adjustment value. The downward adjustment is applied with a down ratio of 200 millivolts (mV) to 4 seconds (200 mV / 4 seconds).                     

Referring to Figures 1 and 2b sequentially described the rotational force control method of the present invention performed by the micro-controller 10 of FIG.

First, it is determined whether the rotational force of the blower motor M is a low-speed drive rotational force (step S11). Here, if the rotational force of the blower motor M is the low speed driving rotational force, the high speed driving steps S11, S15 to S18 are performed, and if the rotational force of the blower motor M is the medium speed or the high speed driving rotational force, low speed driving Steps S11 to S14 are performed.

In the high speed driving steps (S11, S15 to S18), first, when the difference between the pollution degree measurement value and the reference value is larger than the first comparison value (step S15), the medium speed driving for the fourth time T4, for example, for 10 seconds The signal of the dragon rotational force is input to the motor drive circuit 14 (step S16). Next, the difference between the pollution degree measurement value and the reference value is compared again with the first comparison value (step S17). Here, if the difference between the pollution degree measurement value and the reference value is larger than the first comparison value, there is a high possibility that it is not sufficiently ventilated, and thus a signal of the high speed driving rotational force is input to the motor drive circuit 14 (step S18).

In the low speed driving steps S11 to S14, first, when the difference between the pollution degree measurement value and the reference value is greater than the second comparison value (step S12), the rotational force for medium speed driving for the fifth time T5, for example, 50 seconds Is input to the motor drive circuit 14 (step S13). Next, since there is a high possibility that the air is sufficiently ventilated, a signal of the low speed driving rotational force is input to the motor drive circuit 14 (step S14).

Here, the second comparison value is larger than the first comparison value. This is because there is a high possibility that the vent is sufficiently ventilated at the time when the second comparison value is applied (step S12), and it is likely that the vent has not been sufficiently ventilated at the time when the first comparison value is applied (step S15). On the other hand, step S16 is a step for reducing sudden noise and the like caused by the high-speed drive by removing a part of the pollution in the vehicle before being driven at low speed and high speed. Step S13 is a step for more quickly reducing in-vehicle contamination before being driven from high speed to low speed. Here, it is preferable that the fifth time T5 is set longer than the fourth time T4.

As described above, according to the control method of the vehicle air cleaner according to the present invention, since the pollution degree measurement is compared by the reference value reset according to the pollution degree measurement, the air in the vehicle even if the reliability of the pollution degree measurement from the air-pollution detector is low. Increase the control responsiveness of the air cleaner to the degree of pollution.

The present invention is not limited to the above embodiments, and modifications and improvements may be made by those skilled in the art within the spirit and scope of the invention as defined in the appended claims.

Claims (10)

For a vehicle air purifier having an air-contamination detector, a blower, a motor for the blower, and a controller for receiving a signal from the air-contamination detector and controlling the motor for the blower, reading the contamination measurement value from the air-contamination detector. A control method of a vehicle air purifier comprising a reading step, a comparing step of comparing a read contamination level measurement value with a reference value, and a driving step of controlling the blower motor according to the comparison result in the comparing step, An upward resetting step of resetting the reference value by adding an upward adjustment value to the reference value if the contamination degree reading read in the reading step is larger than the reference value; And And resetting the reference value by subtracting a downward adjustment value from the reference value if the pollution degree measurement value read in the reading step is less than the reference value. delete The method of claim 1, And the air-contamination detector is preheated prior to performing the reading step. The method of claim 1, wherein in the upward and downward reset steps, And the upward adjustment value is larger than the downward adjustment value. The method of claim 1, The steps are repeatedly performed sequentially, and the read step is performed after the read wait time T2 has elapsed at the end of performing the upward reset step or the downward reset step, and the read wait time T2 is set to the upward direction. The control method of the on-vehicle air cleaner is reset to the first time (T2 ') in the reset step, and reset to the second time (T2 ") in the downward reset step. The method of claim 5, And the first time (T2 ') is longer than the second time (T2 "). For a vehicle air purifier having an air-contamination detector, a blower, a motor for the blower, and a controller for receiving a signal from the air-contamination detector and controlling the motor for the blower, reading the contamination measurement value from the air-contamination detector. A control method of a vehicle air purifier comprising a reading step, a comparing step of comparing a read contamination level measurement value with a reference value, and a driving step of controlling the blower motor according to the comparison result in the comparing step, The driving step, A high speed driving step of driving the blower motor at a high speed when a difference between the pollution degree measurement value and the reference value is greater than a first comparison value while the rotational force of the blower motor is driven at a low speed; And And a low speed driving step of driving the blower motor at a low speed if the difference between the pollution degree and the reference value is greater than a second comparison value when the rotational force of the blower motor is not driven at a low speed. The method of claim 7, wherein And a control method of the vehicle air cleaner having different first and second comparison values. The method of claim 7, wherein the high speed drive step, Driving the blower motor at a medium speed for a fourth time (T4) when a difference between the pollution degree and the reference value is greater than a first comparison value while the rotational force of the blower motor is driven at a low speed; Comparing the difference between the pollution level and the reference value with the first comparison value again at the end of the fourth time T4; And As a result of the comparison, if the difference between the pollution degree measurement value and the reference value is greater than the first comparison value, driving the blower motor at a high speed. The method of claim 7, wherein the low speed drive step, Driving the blower motor at medium speed for a fifth time T5 when a difference between the pollution degree and the reference value is greater than the second comparison value; And And driving the blower motor at a low speed at the end of the fifth time (T5).

Images