KR100758105B1 - Blower control system and method - Google Patents

Abstract

A blower control system is provided to immediately remove moisture generated inside a windshield of a driving seat, and to prevent accident danger of a driver by discharging blow with high output more than a standard. A blower control system comprises a voltage detecting unit(110), a comparing unit(122), a judgment processing unit(124) and a motor driving unit(130). The voltage detecting unit detects and measures input voltage applied to a blower driving motor(140). The comparing unit compares the measured input voltage with predetermined voltage. The judgment processing unit outputs a control signal for increasing the input voltage to the predetermined voltage when the input voltage is less than the predetermined voltage. The motor driving unit drives the blower driving motor according to a control signal inputted from the judgment processing unit.

Description

 Blower control system and method

1 is a configuration diagram for schematically illustrating a configuration of a blower control system to which the present invention is applicable.

FIG. 2 is a flowchart illustrating a method of increasing an air blow amount by increasing an input voltage applied to a blower driving motor when selecting a DEF mode according to an embodiment of the present invention.

3 is a graph illustrating an input voltage of a blower driving motor rising to the set voltage for a predetermined time according to the DEF mode selection when the blower driving motor input voltage is less than the set voltage in the A / C on state.

Description of the main parts of the drawing

100 input unit 110 voltage detection unit

120: control unit 122: comparison unit

124: judgment processing unit 130: motor driving unit

140: blower drive motor

The present invention relates to a blower control system and method, and more particularly, when the DEF mode is selected in an in-vehicle air conditioner, a voltage above a predetermined standard is applied to the blower driving motor to discharge the air above the predetermined standard, The present invention relates to a blower control system and method that can quickly remove a window's moisture and secure a driver's watch.

In general, the vehicle is equipped with an air conditioner to maintain a comfortable environment for the occupants in various climates and driving conditions, to prevent the windshield of the window, to secure the driver's watch and to drive safely. This is a device to increase the comfort and comfort of the occupants while driving the vehicle and to promote safe driving. The purpose of the present invention is to provide a comfortable feeling to the occupants by maintaining the temperature, humidity and air environment according to the change of the surrounding environment. .

The air conditioner is composed of a heater (heater) and an air conditioner (A / C: Air conditioner) that is an air conditioning and heating device for maintaining the temperature in the vehicle at an appropriate level. In addition, the ventilation mode includes an external air mode for sucking fresh air from the outside of the vehicle to replace the air in the vehicle, and an internal air mode for continuously circulating air in the vehicle.

On the other hand, the cause of the moisture generated on the inner surface of the vehicle window can be largely divided into two. First, when the temperature difference between the inside and outside of the vehicle (the temperature outside the vehicle is low and the temperature inside the vehicle is high) is large, it occurs mainly in winter. Second, the relative humidity inside the vehicle is high, and often occurs in summer or rainy weather.

As described above, when the window is damp, the driver may have difficulty in securing the clock, and thus, the driver may have a severe difficulty in driving the vehicle. Therefore, the vehicle air conditioner generally uses the Defrost mode (hereinafter referred to as the "DEF mode"). This will remove moisture from the windshield in front of the driver's seat. In a typical in-vehicle air conditioner, if DEF mode is selected while A / C is OFF, A / C is ON and the ventilation mode is automatically set to the outside air mode. As the A / C is turned on, the blower is driven, and the blower can remove moisture by discharging air to the inner surface of the glass window in front of the driver's seat. In this process, the blowing amount of the blower is determined according to the input voltage applied to the blower driving motor.

On the other hand, as described above, when the DEF mode is selected when the A / C is off, the input voltage applied to the stopped blower drive motor is set high (6.5 V or more in the embodiment of the present invention) to achieve high output. By blowing the blowing air, moisture generated inside the glass window in front of the driver's seat can be promptly removed.

However, if the DEF mode is selected when A / C is turned on in a general in-vehicle air conditioner, the blower volume of the blower depends on the current input voltage applied to the blower driving motor at the time when the DEF mode is selected. Is determined. That is, the blowing amount is determined according to the input voltage of the blower driving motor operated by the A / C drive before the DEF mode selection, and the blower discharges a certain amount of air to the inside of the glass window in front of the driver's seat without changing the blowing amount. Therefore, when the input voltage applied to the blower driving motor is high when the DEF mode is selected when the A / C is turned on, it is not a problem because the moisture in the vehicle can be removed quickly by the high output blowing. However, when the input voltage is low, the dehumidification speed of the vehicle windshield is inevitably slowed down due to the low output blowing. As a result, the driver's watch is blurred while moisture is left in the windshield in front of the driver's seat, and the driver's driver is undesired and the risk of accident increases.

The present invention has been made to solve the above-described problems of the prior art, and compares the input voltage applied to the blower driving motor with a predetermined set voltage when the DEF mode is selected and the input voltage is less than the predetermined set voltage. By raising the predetermined set voltage, it is always the purpose to discharge the blowing air having a high output of a certain level or more to quickly remove the moisture generated inside the glass window in front of the driver's seat.

The blower control system according to the present invention is a system for controlling the input voltage applied to the blower driving motor in the defrost mode to remove moisture from the glass window in front of the driver's seat, and detecting and measuring the input voltage applied to the blower driving motor. A voltage detector; A comparator for comparing the measured input voltage with a preset set voltage; A determination processor for outputting a control signal for raising the input voltage to the preset set voltage when the input voltage is less than the preset set voltage; And a motor driver for driving the blower driving motor according to the control signal input from the determination processor.

Meanwhile, the blower control method according to the present invention is a method of controlling the input voltage applied to the blower driving motor in the defrost mode to remove moisture from the windshield in front of the driver's seat. Determining whether the device is in an on state; The comparing unit includes: a second step of comparing the current input voltage applied to the blower driving motor with a preset set voltage when the A / C is in an on state; The decision processing unit may include: a third step of outputting a control signal for increasing or maintaining the magnitude of the input voltage according to a comparison result from the comparison unit; And a motor driving unit, for driving the blower driving motor in accordance with a control signal input from the determination processing unit.

Preferably, in the first step, if the A / C is in the off state, the determination processing unit drives the compressor to turn on the A / C, and further operates a fifth step of driving the blower driving motor to a predetermined set voltage. It may include.

In addition, when the input voltage applied to the blower driving motor is less than a predetermined set voltage may output a voltage increase control signal to the motor driver.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram for schematically illustrating a configuration of a blower control system to which the present invention is applicable.

As shown in FIG. 1, the blower control system according to the present invention includes an input unit 100, a voltage detector 110, a controller 120, and a motor driver 130.

The input unit 100 includes a switch (not shown) for selecting the DEF mode, and when the user selects the DEF mode through the switch, the input unit 100 outputs a DEF signal to the controller. The DEF signal is a signal output to the control unit 120 to indicate that the DEF mode is selected.

The voltage detector 110 detects and measures a voltage of an alternating current input to drive the blower driving motor 140, and then outputs the measured value to the controller 120.

When the control unit 120 receives the DEF signal from the input unit 100, the control unit 120 includes a comparison unit 122 and a determination processing unit 124 as a microcomputer for controlling the overall operation of the system of the present invention.

The comparator 122 receives the voltage measured by the voltage detector 110 and compares the voltage with the preset set voltage.

The determination processor 124 determines the on / off state of the A / C (Air Conditioner), and if the A / C is on, the blower driving motor 140 according to the comparison result from the comparator 122. Outputs a voltage raising control signal or a voltage holding control signal that can raise or maintain the voltage applied thereto. When the voltage applied to the blower driving motor 140 is less than the set voltage, the determination processor 124 outputs a voltage increase control signal to increase the voltage to a predetermined set voltage (for example, 6.5V) and blower driving motor ( 140 increases the input voltage applied to the set voltage. If the voltage applied to the blower driving motor 140 is higher than the set voltage, the current blower is driven by outputting a voltage maintenance control signal that can maintain the currently applied voltage. The input voltage applied to the motor 140 is maintained. As a result of the determination by the determination processing unit 124, if the A / C is off, the determination processing unit 124 drives the compressor 150 to turn on the A / C and set the ventilation mode to the outside air mode. In addition, an input voltage equal to a predetermined set voltage is applied to the blower driving motor 140 to drive the blower (not shown).

The motor driver 130 may adjust the voltage of the blower driving motor 140 by limiting the amount of current flowing to the blower driving motor 140 according to the control signal input from the controller 120.

The blower driving motor 140 transmits a rotational force to the blower (not shown) to drive the blower, and drives the rotating speed according to the magnitude of the current signal applied from the motor driver 130.

FIG. 2 is a flowchart illustrating a method of increasing an air blowing amount by increasing an input voltage applied to a blower driving motor when selecting a DEF mode, and FIG. 3 is a view illustrating an A / C on state. If the blower drive motor input voltage is lower than the set voltage, it is a graph to explain the input voltage of the blower drive motor that rises to the set voltage for a predetermined time according to the DEF mode selection.

The determination processor 124 checks whether the DEF mode is selected through the input unit 100 (S10). When the DEF mode is selected through a switch (not shown) included in the input unit 100, and the DEF signal is input to the determination processing unit 124, the determination processing unit 124 turns on the A / C (Air Conditioner). The state of / OFF (OFF) is determined (S12). If the A / C is on, it is determined whether the current ventilation mode is the air mode or the bet mode (S16). When the ventilation mode is the bet mode, the determination processor 124 switches the bet mode to the outside mode through the ventilation mode conversion unit 160 (S18), and is measured by the voltage detector 110 through the comparator 122. By comparing the voltage with a predetermined set voltage (set to '6.5V' in the embodiment of the present invention) it is determined whether the voltage measured by the voltage detector 110 is less than the predetermined set voltage (S20). When the ventilation mode is the outdoor mode, the ventilation mode is maintained in the outdoor mode, and it is determined whether the voltage measured by the voltage detector 110 is less than the predetermined set voltage (S20). When the voltage measured by the voltage detector 110 is less than a predetermined set voltage, the determination processor 124 outputs a voltage increase control signal to the motor driver 130 to set a voltage applied to the current blower driving motor 140 for a predetermined time. During this time, the voltage is increased to the set voltage (6.5V) (for example, '1V / 1sec'). However, when the voltage measured by the voltage detector 110 is greater than or equal to the set voltage, the voltage applied to the current blower driving motor 140 is maintained as it is (S22). If A / C is OFF, the decision processing unit 124 outputs a drive signal to the compressor 150 to drive the compressor 150 to turn on the A / C and set the ventilation mode to the outside air mode ( S14). In addition, the determination processor 124 applies a voltage equal to a predetermined set voltage to the blower driving motor 140 through the motor driving unit 130 to drive the blower driving motor 140 (S26). Meanwhile, in the blower control method according to the present invention, when the user releases the DEF mode, the determination processing unit 124 may apply the input voltage before the DEF mode selection point to the blower driving motor, and after the user selects the DEF mode, When there is a manual operation of the blower output by the air flow rate can be adjusted to increase or decrease.

As described above, when the DEF mode is selected, a voltage higher than a certain standard is always applied to the blower driving motor, so that when the temperature difference between the inside and the outside of the vehicle is large or the relative humidity inside the vehicle is high, the inside of the driver's front windshield Moisture generated can be promptly removed by high power blowing.

In the above embodiment, although the set voltage is set to 6.5V, the air volume may vary depending on the performance difference of the blower driving motor or the external environment according to the vehicle type, and thus the set voltage may be adjusted upward or downward.

As mentioned above, although the preferred embodiment of this invention was shown and described, this invention is not limited to the specific embodiment mentioned above, Usually, in the technical field to which this invention pertains without deviating from the summary of this invention claimed in a claim. Various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or the prospect of the present invention.

As described above, the blower control system and method according to the present invention always applies a voltage higher than a predetermined standard to the blower driving motor when the DEF mode is selected, thereby discharging a high-output blower higher than the predetermined standard, so that the inside and outside of the vehicle can be discharged. When the temperature difference is large or when the relative humidity inside the vehicle is high, moisture generated inside the driver's windshield can be quickly removed. Therefore, since the driver can secure the clock outside the vehicle faster, the driver can prevent the accident of the driver in advance and provide a comfortable and safe driving. In addition, since the above-described object can be achieved by only changing the program without complicated circuit equipment or structure change, the above object can be achieved without additional development cost or cost increase.

Claims (4)

A system that removes moisture from the windshield in front of the driver's seat by controlling the input voltage applied to the blower driving motor in the defrost mode. A voltage detector detecting and measuring an input voltage applied to the blower driving motor; A comparison unit comparing the measured input voltage with a preset set voltage; A determination processor for outputting a control signal for raising the input voltage to the preset set voltage when the input voltage is less than the preset set voltage; And And a motor driver for driving the blower driving motor according to the control signal input from the determination processor. As a method to remove moisture from the windshield in front of the driver's seat by controlling the input voltage applied to the blower driving motor in the defrost mode. The determination processing unit may include: a first step of determining whether the A / C is on when the DEF signal is input; The comparison unit may include: a second step of comparing the current input voltage applied to the blower driving motor with a predetermined set voltage when A / C is on; The decision processing unit may include: a third step of outputting a control signal for increasing or maintaining the magnitude of the input voltage according to a comparison result from the comparison unit; And And a motor driving unit comprises a fourth step of driving the blower driving motor according to a control signal input from the determination processing unit. The method according to claim 2, As a result of the determination in the first step, if the A / C is off, the determination processing unit further comprises a fifth step of driving the compressor to turn on the A / C and driving the blower driving motor to a predetermined set voltage. Blower control method. The method according to claim 2, The third step is And a voltage increase control signal is output to the motor driver when the input voltage applied to the blower driving motor is less than a predetermined set voltage.

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