KR101219378B1 - Anti-fogging device for wind-shield glass of automobile and method thereof - Google Patents

Abstract

The present invention relates to a device for preventing fogging of an automobile window and a method for preventing fogging using the device. The present invention relates to a comparison module (100) for comparing indoor and outdoor temperatures, indoor and outdoor humidity of an automobile, and humidity of indoor and outdoor measured by the sensor unit (100) And a control module 220 connected to the comparison module 210. The control unit 200 controls at least one of a heater, an air conditioner, a wiper or a damper And a controller 320 for controlling the operation of the air conditioner or the wiper when the temperature difference and the humidity difference between the indoor and the exterior of the vehicle are equal to or more than the reference value by the comparison module 210. [ And when the temperature difference and the humidity difference between the indoor and the exterior of the automobile are equal to or lower than the reference value by the comparison module 210, The buffer drive module 360 or the outdoor air to bet operation leads to the discharge in the car.

Description

TECHNICAL FIELD [0001] The present invention relates to an anti-fogging device for windshield glass,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an apparatus and method for preventing fogging of an automobile window, and more particularly, to a technique for automatically preventing or eliminating fogging of an automobile window using an air conditioner of an automobile.

Generally, when the indoor and outdoor temperature difference of the vehicle is large during the summer or winter season, fogging occurs on the windshield of the vehicle. This occurs when air at a relatively high temperature (the interior of the vehicle (winter) or the outside of the vehicle (summer)) reaches the dew point as soon as it touches the surface of a relatively low temperature window.

Such gimrelim is not only very advantageous for driving by interfering with the driver's field of view, but also inconveniences such as time required for removing such fogging after starting of the vehicle.

In order to solve this problem, conventionally, the introduction of the outside air at the initial start-up delayed the rise of the internal temperature of the vehicle, but this had a problem that the initial heating performance was deteriorated.

In addition, conventionally, fogging can not be prevented automatically depending on the humidity or temperature of the vehicle, and the driver has to manually operate the defrost mode to prevent fogging

In order to effectively prevent or remove the fogging, it is necessary to accurately calculate the temperature and humidity difference between the inside and the outside of the vehicle. It is necessary to precisely measure the humidity or temperature of the vehicle first.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to prevent or eliminate fogging of an automobile window through automatic control.

Another object of the present invention is to make accurate measurement of the temperature and humidity inside the automobile.

According to an aspect of the present invention for achieving the above object, the present invention provides an air conditioner comprising: a sensor unit for measuring the indoor and outdoor temperatures of the vehicle and the indoor and outdoor humidity respectively; A controller for controlling at least one of a heater, an air conditioner, a wiper, and a damper, the controller being controlled by the control unit and including a control module connected to the comparison module, Wherein the comparison module prevents fogging of the windshield by operating an air conditioner or a wiper when the temperature difference and the humidity difference between the indoor and outdoor of the vehicle are equal to or more than the reference value, The difference between the temperature difference and the humidity difference is equal to or less than the reference value The damper driving module of the driving unit operates to induce the outside or inside air to be discharged into the automobile.

When the internal temperature of the automobile is relatively higher than the external temperature and relatively higher than the reference value and the humidity inside the automobile is higher than the reference value, the air conditioner is driven by the controller, The wiper is driven by the controller when the internal temperature is relatively lower than the reference value and the humidity outside the automobile is higher than the reference value.

The control unit is provided with a data storage unit, and a record controlled by the control module of the control unit is stored.

The damper driving module is driven when the difference between the room temperature and the outdoor temperature of the automobile is equal to or less than a reference value, and the damper driving module is driven by the outside air or the outside air And the heater driving module is operated when the internal temperature of the automobile is relatively higher than the reference temperature and higher than the reference temperature, but the humidity inside the automobile is not less than the reference value.

The control unit includes a damping module. The damping module drives the compressor until the driving time of the compressor of the air conditioner driving module becomes equal to or longer than a set time when the on / off of the air conditioner is repeated within a predetermined time.

The sensor unit includes an indoor temperature sensor and an indoor humidity sensor. The indoor temperature sensor and the indoor humidity sensor are installed at the lower left side of the windshield.

According to another aspect of the present invention, there is provided a method for preventing fogging of an automobile window, comprising the steps of: measuring indoor and outdoor temperatures of a vehicle and indoor and outdoor humidity respectively; A first driving step of operating the air conditioner or the wiper to prevent fogging of the windshield of the vehicle when the temperature difference and the humidity difference between the indoor and the exterior of the vehicle are equal to or more than the reference value in the comparing step; And a second driving step of driving the damper driving module of the driving unit to discharge the outside air or the inside air to the inside of the automobile when the temperature difference and the humidity difference between indoor and outdoor of the indoor unit are below the reference value or lower.

The first driving step may include driving the air conditioner by the controller when the internal temperature of the automobile measured in the comparing step is relatively higher than the reference temperature and relatively higher than the reference value, Is relatively lower than the reference value and the humidity outside the automobile is higher than the reference value, the wiper is driven by the controller.

Wherein when the difference between the room temperature and the outdoor temperature of the vehicle is equal to or greater than the reference value, the outdoor air or the indoor air is guided to the inside of the vehicle in the comparison step, and the interior temperature of the vehicle is relatively The heater is operated when the humidity inside the automobile is equal to or lower than the reference value.

When the air conditioner is operated in the first driving step, a damping step is added for driving the compressor until the driving time of the compressor connected to the air conditioner becomes equal to or longer than the predetermined time when the on / off of the air conditioner is repeated within a predetermined time .

The following effects can be expected in the fogging prevention apparatus for an automobile window according to the present invention as described above and the fogging prevention method using the same.

In the present invention, since the fogging of the window glass is prevented or eliminated by automatic control without requiring the driver to manually operate the air conditioner or the heater, the stability of the vehicle operation is improved and the driver's convenience is improved.

In particular, in the present invention, fogging is prevented in the most appropriate manner such as air conditioner, heater, or wiper operation in various temperature and humidity environments, so that the effect of preventing or eliminating fogging can be expected to be improved.

In the present invention, humidity and temperature sensors are installed at optimal positions by experiments, so that humidity and temperature can be measured accurately, which leads to effective fogging / removal, thereby improving efficiency.

In addition, the present invention has an effect of preventing the instability of the vehicle torque generated by the rapid change of the driving and stopping of the compressor due to frequent on / off of the air conditioner.

In the present invention, the temperature difference and the humidity of the inside and outside of the automobile are grasped, and when the probability of fogging of the windshield of the automobile is low, cooling and heating are appropriately performed to improve the comfort inside the vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram schematically showing a configuration of a preferred embodiment of an antifogging apparatus for an automobile window according to the present invention. Fig.
FIG. 2 is a schematic view showing a windshield of a vehicle to which a sensor unit constituting an embodiment of the present invention is installed. FIG.
3 is a flowchart showing a configuration of a preferred embodiment of a method for preventing fogging of an automobile window according to the present invention.
FIG. 4 is a flowchart showing a configuration of a comparison step added to the embodiment of FIG. 3; FIG.
5 is a flowchart showing a configuration of a damping step constituting an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a fogging prevention apparatus for an automobile window according to the present invention and a fogging prevention method using the same will be described in detail with reference to the accompanying drawings.

Fig. 1 is a block diagram showing a configuration of a preferred embodiment of an antifogging apparatus for an automobile window according to the present invention.

As shown in the figure, the anti-fogging device for the windshield of automobile includes the sensor unit 100, the control unit 200, and the driving unit 300, which will be described below in order.

The sensor unit 100 includes a room temperature sensor 110, an outdoor temperature sensor 120, and an indoor humidity sensor 130 for measuring the temperature and humidity of a vehicle interior and exterior. Of course, although not shown, an outdoor humidity sensor may also be included.

The room temperature sensor 110 and the outdoor temperature sensor 120 are for measuring indoor and outdoor temperatures of the vehicle, respectively, and in this embodiment, they are formed of an electronic thermometer.

The indoor humidity sensor 130 is for measuring the indoor humidity of the automobile. The indoor humidity sensor 130 measures the state of the interior of the automobile together with the indoor temperature sensor 110 and transmits the result to the control unit 200, So that the unit 300 can be properly operated. The indoor humidity sensor 130 is configured to measure an output voltage value electronically.

The installation position of the indoor humidity sensor 130 should be appropriately determined because the humidity to be measured varies depending on the installation position of the indoor humidity sensor 130 and affects the control of the control unit 200 to be.

Preferably, the indoor humidity sensor 130 is installed at a position adjacent to the window. This is because the humidity around the windshield can be measured more directly by being installed adjacent to the windshield where the windshield is generated. Hereinafter, a process of determining an appropriate installation position of the indoor humidity sensor 130 through an experiment will be described.

In FIG. 2, the positions where the indoor humidity sensor 130 is to be installed in the windshield of the vehicle are indicated by reference symbols 1 to 6. That is, in FIG. 2, upper left, center, right, lower left, center, and right sides of the windshield are indicated by reference numerals 1 to 6, respectively.

At this time, in the experiment, the humidity sensor 130 was installed at each position and the driving unit 300 was operated after the fogging was arbitrarily generated to measure the humidity with time.

Graph 1 below shows the case where the indoor humidity sensor 130 is installed at the upper left side of the windshield window, that is, the position ① in FIG. In this case, 1 ~ 1 ', 2 ~ 2', etc. show the process of removing the fogging by operating the driving unit 300 under different conditions. Here, the other conditions are different from each other in operating temperature or air volume it means.

Graph 4 below shows the case where the indoor humidity sensor 130 is installed at the lower center of the windshield, that is, at the position 4 in Fig. At this time, the experiment was performed in the same manner as in the graph 1 described above.

Table 1 below summarizes the results of experiments conducted at each position of windshield. More precisely, the respective numerical values in Table 1 show the difference in voltage value measured before and after the operation of the drive unit 300 measured from the indoor humidity sensor 130. [ This means that the larger the value, the greater the difference in humidity before and after the operation of the drive unit 300, which means that a relatively large amount of fogging has been removed. (Unit: volt)

As shown in Table 1, when the indoor humidity sensor 130 is installed on the lower left side of the windshield on the average, the humidity difference is relatively large. This means that the humidity change is significant at the bottom left of the windshield, indicating that more fogging occurs at the lower left of the windshield. It is expected that driver 's body temperature affected the humidity of the windshield.

As a result, it is preferable that the indoor humidity sensor 130 is installed on the lower left side of the windshield. Also, since it is desirable that the room temperature is also measured at the same position as the humidity, the room temperature sensor 110 is also installed at the lower left side of the vehicle in this embodiment.

The control unit 200 controls the operation of the control module 220, the comparison module 210, and the data storage unit (not shown) 230).

The comparison module 210 is connected to the sensor unit 100 and receives a signal from the sensor unit 100 to compare the signal. That is, the comparison module 210 calculates the temperature difference between the indoor and the outdoor and the indoor and outdoor humidity difference, and transmits the calculated humidity difference to the control module 220.

The control module 220 determines the most suitable driving method of the driving unit 300 through the temperature difference and the humidity difference, and controls the driving unit 300 through the determined driving method. The control by the control module 220 will be described in detail below.

Meanwhile, the data storage unit 230 stores the comparison value of the comparison module 210 and the control by the control module 220 according to the comparison value. The data storage unit 230 stores the comparison value of the driving unit 300, Control is performed. In other words, the driver can store it when it is considered to be the most efficient, and then call it up later to perform the same control.

Next, the driving unit 300 will be described. The driving unit 300 substantially prevents / removes fogging. An input unit 310 is provided to receive a signal from the control unit 200 do.

The controller 320 is connected to the input unit 310. The controller 320 includes a heater driving module 330, an air conditioner driving module 340, a wiper driving module 350 and a damper driving module 360 .

The heater driving module 330 and the air conditioning driving module 340 are both included in the air conditioner of the automobile, and act to prevent / remove the fogging according to the situation.

The wiper drive module 350 operates to remove the fogging on the outer surface of the windshield when the temperature outside the vehicle is higher than the internal temperature.

The damper driving module 360 serves to prevent or remove fogging by discharging the inside air or outside air of the automobile through the defrost vent to the room when the temperature difference between the indoor and the outdoor is not severe. It controls the flow.

Hereinafter, a method of preventing fogging of an automobile window according to the present invention will be described with reference to FIGS. 3 to 5. FIG.

3, temperature and humidity of indoor and outdoor are measured by the sensor unit 100 (measuring step, P1). Then, the measured values are transmitted to the comparison module 210 of the control unit 200 do.

The comparison module 210 compares the room temperature with the outdoor temperature (comparison step P2). As a result, if the room temperature is higher (for example, during winter), the possibility of fogging on the inner surface of the window is high.

In this case, the indoor / outdoor temperature difference is calculated again and it is determined whether the value is higher than the reference value A1 (P3). If it is higher than the reference value, it is determined whether the room humidity is higher than the reference value B1 (P4). If the indoor humidity is higher than the reference value B1, the controller 320 is transmitted to the air conditioner.

In other words, when both the temperature difference and the humidity difference between the indoor and the outdoor are higher than a certain level, the possibility of fogging is high. Therefore, the air conditioner is driven to reduce the temperature difference between indoor and outdoor. In this embodiment, the reference value of the temperature difference is 15 ° and the room humidity is 70%. (First driving step)

On the other hand, the heater may be driven when the temperature difference is equal to or higher than the reference value (the minimum value) or the indoor humidity is lower than the reference value. In this case, since the probability of occurrence of fogging is low, The module 330 is operated.

When the temperature difference is equal to or lower than the reference value (the minimum value), the blower and damper drive module 360 are operated to suck the outside air. This is because, when the temperature difference between the indoor and the outdoor is insignificant, it is unnecessary to heat or cool the room, so the outdoor air can be sucked in without the operation of the air conditioner or the heater. Second driving step) Of course, when the temperature difference is less than the minimum value, it can be terminated without driving any heater.

Returning to the indoor / outdoor temperature comparison, if the outdoor temperature is higher (for example, during the summer), the temperature difference is also measured and compared with the reference value A2 (P5). At this time, if the temperature difference is more than the reference value, the external humidity is measured again by the external humidity sensor and the value is compared with the reference value (P6).

If the external humidity is higher than the reference value, the controller 320 operates the wiper drive module 350 because the possibility of fogging on the outer surface of the windshield is high. In this case, fogging of the outer surface of the window can be prevented / eliminated.

If the external humidity is lower than the reference value, the possibility of fogging is low, and thus the air conditioner is operated through the air conditioner driving module 340. This means that the cooling function is activated for indoor comfort because the probability of fogging is low.

On the other hand, if the indoor / outdoor temperature difference is less than or equal to the reference value A2 (the minimum value), the probability of occurrence of fogging is low in this case as well, and in this case, since there is little need for cooling, the blower and damper driving module 360 are operated, . This is to ensure that the difference between the inside air and the outside air is reduced through the inhalation temperature inhalation so that the fogging can be prevented / eliminated naturally. Of course, when the temperature difference is below the minimum value, it can be terminated without any additional driving.

Next, referring to FIG. 4, a method for preventing fogging of an automobile window will be described. After the fogging is prevented / removed through the above process, the outdoor humidity is measured again (P7). If the indoor humidity is higher than the reference value B1 (P8), the above process is repeated to prevent fogging. If the indoor humidity is lower than the reference value, the outdoor humidity is determined.

If the outdoor humidity is higher than the reference value B2 (P9), the above process is repeated. Through this repetition, fogging of the windshield can be reliably prevented / eliminated.

Figure 5 shows a process for reducing the burden imposed on the compressor through the damping module. 3, when the air conditioner is operated, the compressor included in the air conditioner driving module 340 also operates.

At this time, the damping module counts the operation duration of the compressor. If the OFF signal of the air conditioner is input (P10), it is determined whether the counted duration is equal to or longer than the preset time (P11)

If the operation duration of the compressor is less than the set time, the compressor is not immediately stopped despite the off signal, and the compressor is held until the duration exceeds the set time.

This is because, if the operation / stop of the compressor is repeated within a predetermined time, the vibration of the vehicle is caused and the torque of the vehicle is unstable.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

Although the front windshield of an automobile has been described as an example in the above embodiment, the present invention is not necessarily limited to this, but can also be applied to a rear windshield of an automobile. In this case, the heating wire may be provided instead of the heater driving module 330.

100: Sensor unit 110: Room temperature sensor
120: outdoor temperature sensor 130: indoor humidity sensor
200: control unit 210: comparison module
220: control module 230: data storage unit
300: drive unit 310: input unit
320: controller 330: heater driving module
340: air conditioner driving module 350: wiper driving module
360: Damper drive module

Claims (10)

A sensor unit for measuring indoor and outdoor temperatures of the vehicle, and indoor and outdoor humidity respectively,
A control module including a comparison module for comparing the indoor / outdoor temperature and indoor / outdoor humidity measured by the sensor unit and a control module connected to the comparison module;
A drive unit controlled by the control unit and including a controller for selectively activating at least one of a heater, an air conditioner, a wiper, and a damper,
When the temperature difference and the humidity difference between indoor and outdoor of the automobile are equal to or more than the reference value by the comparison module, the air conditioner or the wiper is operated to prevent fogging of the automobile window,
When the temperature difference and the humidity difference between the indoor and the exterior of the automobile are equal to or less than the reference value by the comparison module, the damper drive module of the drive unit operates to induce the outside or inside air to be discharged into the automobile,
When the internal temperature of the automobile is relatively higher than the external temperature and relatively higher than the reference value and the humidity inside the automobile is higher than the reference value, the air conditioner is driven by the controller, The wiper is driven by the controller when the internal temperature is relatively lower than the reference value and the humidity outside the automobile is higher than the reference value,
The damper driving module is driven when the difference between the room temperature and the outdoor temperature of the automobile is equal to or less than a reference value, and the damper driving module is driven by the outside air or the outside air The heater driving module is operated when the internal temperature of the automobile is relatively higher than the reference temperature and higher than the reference temperature but the humidity inside the automobile is less than the reference value,
Wherein the sensor unit includes a room temperature sensor and a room humidity sensor, wherein the room temperature sensor and the room humidity sensor are installed at a lower left side of a front window of an automobile.
delete The apparatus according to claim 1, wherein the control unit is provided with a data storage unit, and a record controlled by the control module of the control unit is stored.
delete The air conditioner according to claim 3, wherein the control unit is provided with a damping module, and the damping module controls the damping module until the driving time of the compressor of the air conditioner driving module becomes longer than a set time And then stopping the driving of the windshield.
delete A method for preventing fogging of an automobile window,
A measuring step of measuring the indoor and outdoor temperatures of the vehicle and the indoor and outdoor humidity respectively,
A comparison step of comparing the measured indoor / outdoor temperature and indoor / outdoor humidity;
A first driving step of operating the air conditioner or the wiper to prevent fogging of the windshield when the temperature difference and the humidity difference between the indoor and outdoor of the vehicle are equal to or greater than the reference value,
And a second driving step of driving the damper driving module of the driving unit to discharge the outside air or the inside air into the vehicle when the temperature difference and the humidity difference between the indoor and outdoor of the automobile are equal to or less than the reference value,
Wherein when the internal temperature of the automobile measured by the comparing step is relatively higher than a reference value and the humidity inside the automobile is equal to or higher than a reference value, the first driving step drives the air conditioner by the controller, When the humidity outside the automobile is lower than the reference value and the humidity outside the automobile is higher than the reference value, the wiper is classified as being driven by the controller,
Wherein when the difference between the room temperature and the outdoor temperature of the vehicle is equal to or greater than the reference value, the outdoor air or the indoor air is guided to the inside of the vehicle in the comparison step, and the interior temperature of the vehicle is relatively The heater is operated when the humidity inside the automobile is lower than the reference value,
In the measuring step, temperature and humidity are measured by a sensor unit. The sensor unit includes an indoor temperature sensor and an indoor humidity sensor. The indoor temperature sensor and the indoor humidity sensor are installed at the lower left side of the windshield A method for preventing fogging of an automobile window.
delete delete [8] The method of claim 7, wherein, when the air conditioner is operated in the first driving step, the driving time of the compressor connected to the air conditioner is driven until the set time is exceeded, Wherein the damping step is added to the damping step.

Images