JPH03295717A - Intrusion prevention device of washer smell for vehicle - Google Patents

Abstract

PURPOSE:To prevent washer smell from intruding in the room of a vehicle by moving an inside-outside air switching damper to the position for guiding air in the room of vehicle by a time corresponding to a specified period when the smell of washer is judged to intrude in the room and air outside the room is guided in an air introduction passage. CONSTITUTION:A device for preventing washer smell into the room of vehicle 10 is mounted on an air conditioner for a vehicle having an inside-outside air switching damper 50 for guiding air inside the room and air outside the room selectively to an air introducing passage 48 and an actuator for moving the dumper 50. In this case, to a control circuit 34 of the device 10 are connected a position sensor 56 for detecting the position of inside-outside air switching dumper 50 and a window washer switch 38 of a window washer 26. When the smell of washer is judged to intrude in the room and air outside the room is introduced in the air introduction passage 48, the actuator 54 is controlled to introduce air inside the room by a time corresponding to a specified period.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for preventing washer odor from entering a vehicle interior.

[Prior Art and Problems to be Solved by the Invention] A window washer device is installed in a vehicle to clean a windshield glass.

When a switch is operated by a passenger, the window washer device injects stored window washer liquid onto the windshield glass to clean the windshield glass. The sprayed window dressing liquid flows down along the windshield glass and is discharged to the cowl side through the cowl. This window washer fluid uses an alcohol solution as a base to lower the freezing point, thereby preventing it from freezing during low temperatures such as in winter. As for the type of alcohol used in this alcohol solution, ethanol and methanol are often used in Japan, and isopropanol is often used in Europe. Among these alcohols, Improper Tool has a particularly strong odor. In addition, in cold regions such as Northern Europe, the alcohol concentration in window dressing fluid is increased (50%
degree), further lowering the freezing point.

On the other hand, a vehicle air conditioner includes an air intake port for introducing air from outside the vehicle interior into the vehicle interior, and this air intake port is often opened in the cowl. Therefore, when the window dressing fluid sprayed onto the windshield glass is discharged, some of the alcohol contained in the window dressing fluid vaporizes near the cowl and enters the vehicle interior through the air intake port. Occasionally, the occupants of the aircraft noticed a strange odor. Particularly, when Improper Tool was used as the alcohol and a window washer liquid with a high alcohol concentration was used, a strong odor could be felt inside the vehicle.

The present invention has been made in consideration of the above-mentioned fact, and an object of the present invention is to provide a washer odor intrusion prevention device for a vehicle in which the occupant does not feel any strange odor even when the window washer device is operated.

[Means to solve the problem]

In order to achieve the above object, the vehicle washer odor intrusion prevention device according to the present invention is provided in the middle of an air guide path that introduces air into the vehicle interior, and is moved to prevent air inside the vehicle interior and outside the vehicle interior. A washer odor intrusion prevention device for a vehicle, which is attached to a vehicle air conditioner, has an inside/outside air switching damper that selectively guides air into an air guide path, and an actuator that moves the inside/outside air switching damper, A determination means for determining whether washer odor enters the vehicle interior when air from outside the vehicle is introduced; a position detection means for detecting the position of an inside/outside air switching damper; a prediction means for predicting a period during which washer odor will enter the vehicle interior; and a prediction means for predicting a period during which washer odor will enter the vehicle interior; and control means for controlling the actuator so that the inside/outside air switching damper moves to a position where it guides air inside the vehicle interior for a time corresponding to the period.

[Effect]

The present invention predicts the period during which the washer odor will enter the vehicle interior when air from outside the vehicle is introduced, and also determines that the washer odor will enter the vehicle interior and uses the inside/outside air switching damper to direct the air outside the vehicle. The actuator is controlled so that air inside the vehicle is introduced for a time corresponding to the period when the actuator is at the position where the actuator is guided to the road. Therefore, if it is determined that washer odor has entered the vehicle, the introduction of air from outside the vehicle can be stopped, so air from outside the vehicle that contains vaporized alcohol is not introduced into the vehicle interior, and the window washer device is Even when the system is activated, passengers do not notice any strange odors.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the vicinity of a windshield glass 16 of a vehicle 14 to which a vehicle washer odor intrusion prevention device 10 and a vehicle air conditioner 12 according to the present invention are installed. One end of the windshield glass 16 is connected to the roof 18
The other end is connected to the cowl 20. A bonnet 22 is arranged near the cowl 20 and extends from near the connection between the cowl 20 and the windshield glass 16 toward the front of the vehicle 14. A washer liquid injection port 24 is attached to the bonnet 22.

As shown in FIG. 2, the washer fluid injection port 24 constitutes a part of a window washer device 26. As shown in FIG. The window washer device 26 includes a tank 28 in which a window washer liquid 30 is stored. A concentration sensor 32 is connected to the tank 28 to detect the alcohol concentration of the window dressing liquid 30 within the tank 28 . As the concentration sensor 32, for example, a floating type concentration meter that detects the concentration from the specific gravity of the liquid can be used. The concentration sensor 32 is connected to a control circuit 34 that constitutes a part of the vehicle washer odor intrusion prevention device IO, and outputs the detected concentration value to the control circuit 34. The tank 28 communicates with the washer fluid injection port 24 via a pump 36.

The pump 36 is activated by the window washer switch 3 by the passenger.
8 is operated, and the window washer liquid is injected from the washer liquid injection port 24.

As a result, the window dressing liquid is sprayed onto the middle portion of the windshield glass 16 in a trajectory shown by a dashed line in FIG. This cleans the windshield glass 16. The sprayed window dressing liquid 30 is applied to the cowl 2 along the windshield glass 16.
It flows down to 0.

The window washer switch 38 is connected to a control circuit 34, and whether or not the window washer switch 38 is operated by the occupant is detected.

On the other hand, an opening 40 is provided in the cowl.

One end of an outside air intake duct 42 is attached to the opening 40, and the other end of the outside air intake duct 42 is connected to the vehicle air conditioner 1.
It extends into the air conditioner main body 44 of No. 2. As a result, air from outside the vehicle near the cowl 20 is supplied into the air conditioner main body 44 through the opening 40 and the outside air intake duct 42.

As shown in FIG. 2, inside the air conditioner main body 44,
One end of an inside air suction duct 46 and one end of a ventilation duct 48 are connected to an end of the outside air suction duct 42 . Outside air intake duct 42, inside air intake duct 46, and ventilation duct 48
constitutes an air guide path. The inside air intake duct 46 communicates with the vehicle interior, and is designed to suck in air from the vehicle interior and guide it into the air conditioner main body 44 . An inside/outside air switching damper 50 is disposed near the connection between the outside air intake duct 42 and the inside air intake duct 46. The inside/outside air switching damper 50 is movable between a position shown by a solid line and a position shown by a broken line in FIG. Vehicle air conditioner 1 of this embodiment
2 has an outside air introduction mode (FRESH) and an inside air circulation mode (REC) as intake modes. The state in which the inside/outside air switching damper 50 is located at the position shown by the solid line in FIG. 2 corresponds to rFREsHJ, and the air outside the vehicle interior sucked into the ventilation duct 48 via the outside air intake duct 42 is guided. In addition, the state in which the inside/outside air switching switch 50 is located at the position indicated by the broken line in FIG. .

The inside/outside air switching damper 50 is connected to a drive shaft of an actuator 54 (not shown) via a link 52. The actuator 54 moves the inside/outside air switching switch 50 to the rFREsHJ position or the rRECJ position by driving the motor. The actuator 54 is connected to the control circuit 34 and
The drive of the motor is controlled by The actuator 54 also detects the position of the link 52 and determines whether the position of the inside/outside air switching damper 50 corresponds to "rFREsH".
It has a built-in position sensor 56 that detects whether it is compatible with REc. The position sensor 56 is connected to the control circuit 34 and outputs a detection result to the control circuit 34.

A blower motor 58 is disposed in the middle of the ventilation duct 48. The blower motor 58 sends the air guided into the ventilation duct 48 to the downstream side of the ventilation duct 48 as an air flow. On the downstream side of the blower motor 58 in the ventilation duct 48, there is an evaporator 60 that is a heat exchanger for cooling.
is located. The evaporator 60 constitutes a part of a circulation path in which the evaporator 60, a compressor (not shown), a condenser, and an expansion valve are sequentially connected. This circulation path acts as a refrigeration cycle.

The refrigerant passing through the evaporator 60 absorbs latent heat from the air passing through the ventilation duct 48 and vaporizes. Thereby, the air passing through the ventilation duct 48 is cooled.

A heater core 62, which is a heat exchanger for heating, is arranged in the ventilation duct 48 on the downstream side of the evaporator 60. An air mix damper 6 is installed near the heater core 62.
4 are provided. The air mix damper 64 is the second
It is movable between a position where air passing through the heater core 62 is blocked, indicated by a solid line in the figure, and a position where air bypassing the heater core 62 is blocked, indicated by a broken line in FIG. The air mix damper 64 is connected to a drive shaft of a motor (not shown) of an actuator 68 via a link 66. The actuator 68 moves the air mix damper 64 by the driving force of the motor, and separates the air passing through the ventilation duct 48 into air that passes through the heater core 62 and is heated, and air that bypasses the heater core 62 and is not heated. , the proportion of can be adjusted. This allows the air mix damper 6 to pass through the ventilation duct 48.
4. The temperature of the air flowing downstream is adjusted.

The actuator 68 is connected to the control circuit 34,
The drive of the motor is controlled by the control circuit 34 in accordance with the operation of a temperature control switch (not shown) by the occupant.

The ventilation duct 48 is branched into three ventilation ducts 70, 72, and 74 downstream of the heater core 62. 1st
As shown in the figure, the ventilation duct 70 communicates with the vehicle interior via a defroster 76 provided near the windshield glass 16, and the air guided into the ventilation duct 70 is blown inside the windshield glass 16. Can be attached. The ventilation duct 72 communicates with the vehicle interior via a register 78 provided in the middle of the console 81.
The air guided inside is blown onto the occupants.

The ventilation duct 74 communicates with the interior of the vehicle via a footwell outlet 80 provided below the console 81, and the air guided into the ventilation duct 74 is blown onto the feet of the occupant.

3 ventilation ducts 70.72.74 from ventilation duct 48
There is a ventilation duct 70.72.7 near the part where it branches into
Three air outlet switching dampers 82 are attached corresponding to each of the four air outlet switching dampers 82. Each of the outlet switching dampers 82 is movable between a position where the opening portion communicating with each ventilation duct 70, 72, 74 is opened and a position where the opening portion is blocked. Each of the outlet switching dampers 82 is connected to an actuator 86 via a link 84 and is moved by the actuator 86. The actuator 86 is connected to the control circuit 34, and is controlled by the control circuit 34 in response to the operation of an air outlet selection switch (not shown) by the occupant.

A vehicle interior temperature sensor 88 and a vehicle interior humidity sensor 90 are connected to the control circuit 34 . The vehicle interior temperature sensor 88 detects the temperature inside the vehicle interior, and outputs the detected temperature value to the control circuit 34. The vehicle interior humidity sensor 90 detects the humidity in the vehicle interior, and outputs the detected humidity value to the control circuit 34. Also,
A glass surface temperature sensor 92 is connected to the control path 34 .

As shown in FIG. 1, a glass surface temperature sensor 92 is attached to the surface of the windshield glass 16 on the inside of the vehicle. The glass surface temperature sensor 92 detects the surface temperature of the interior side of the windshield glass 16 and controls the control circuit 34.
Output to.

Further, a speed sensor 94 is connected to the control circuit 34. Speed sensor 94 detects the speed value of vehicle 14 and outputs the detected speed value to control circuit 34 . Furthermore, intake mode selection switches 96 and 98 are connected to the control circuit 34. The intake mode selection switches 96 and 98 are operated by the occupant. The control circuit 34 selects an internal air circulation mode (R) as an intake mode when the selection switch 96 is operated.
When it is determined that EC) has been designated and the selection switch 98 is operated, the outside air introduction mode (FRE) is selected as the intake mode.
SH) is specified.

Next, an embodiment of the present invention will be described with reference to the flowcharts of FIGS. 3 and 4. Note that the flowchart shown in FIG.
8 is operated.

First, in steps 100 to 106, a process is performed to determine whether or not washer odor will enter the vehicle interior when air from outside the vehicle interior is introduced. That is, step 10
At 0, the time T1 from when the passenger turns on the window washer switch 38 to when the passenger turns it off is counted. In step 102, the time T1 obtained in step 100 is compared with a preset reference time T0, and the reference time T is determined. Determine whether it is longer than . In this embodiment, this reference time T. is said to be about 3 to 5 seconds. Step 102
If the determination is negative, it is determined that the amount of the injected window washer fluid 30 is small and the occupant will not feel any alcohol odor, and the process is terminated.

If the determination in step 102 is affirmative, step 104
Then, the density value D1 output by the density sensor 32 is taken in. In step 106, the density value taken in step 104 is set to a preset reference density value. Compared to the standard concentration value.

Determine whether it is higher than . In this example, this reference concentration value is used. is estimated to be around 30%.

If the determination in step 106 is negative, it is determined that the alcohol concentration of the injected window washer liquid 30 is low, so that the occupant will not feel any alcohol odor, and the process is terminated.

If the determination in step 106 is affirmative, step 108
Then, the vehicle interior temperature value t1 outputted by the vehicle interior temperature sensor 88 is taken in. In step 110, the humidity value mI of the vehicle interior output by the vehicle interior humidity sensor 90 is taken in. In step 112, the temperature value 1. and the humidity value m, the dew point temperature t in the vehicle interior. Calculate. In step 114, the surface temperature t2 of the windshield glass 16 on the passenger compartment side outputted by the glass surface temperature sensor 92 is taken.

In step 116, the surface temperature t2 taken in step 114 is converted to the dew point temperature t obtained in step 112. compared to the dew point temperature t. Determine whether it is higher than . If the determination in step 116 is negative, if the introduction of outside air is cut off, water vapor will condense on the surface of the windshield glass 16 on the passenger compartment side, causing fogging of the windshield glass 16. Therefore, move the inside/outside air switching damper 50. The process ends without any problem.

If the determination in step 116 is affirmative, the process moves to step 118. In steps 118 and 120, a switching time T2 is calculated to switch the inside/outside air switching damper 50 to the "REC" position in order to prevent washer odor from entering the vehicle interior. That is, the vehicle 1 detected by the speed sensor 94
Take in the vehicle speed value V of 4. In step 120, the switching time T2 of the inside/outside air switching damper 50 is determined based on the vehicle speed value V acquired in step 118. The vehicle speed value and the switching time are inversely proportional as shown in FIG. That is, as the vehicle speed increases, the velocity of the air flowing near the cowl 20 increases, and the amount of evaporation of the discharged window dressing fluid 30 per unit time increases. The time required to set the outside air switching damper 50 to the rRECJ position and stop introducing outside air can be shortened.

In step 124, the position of the inside/outside air switching damper 50 detected by the position sensor 56 is determined as "rFREsH".
Determine whether or not. If the determination in step 124 is negative, there is no need to move the inside/outside air switching damper 50, so the process ends.

If the determination in step 124 is affirmative, snap 1
At 26, the actuator 54 is controlled to move the internal/external air switching damper 50 from the rFREsHJ position to the rRECJ position. As a result, outside air containing vaporized alcohol is not introduced into the ventilation duct 48, and alcohol odor does not enter the vehicle interior. Next step 1
28, the switching time T2 obtained in step 120 after moving the inside/outside air switching damper 50 in step 126 is determined.
It is determined whether or not the period has elapsed. If the switching time has not elapsed, step 128 is repeated until the switching time has elapsed. After the switching time T2 has elapsed, the actuator 54 is controlled in step 130 to turn the inside/outside air switching damper 50 to rRE.
The vehicle is moved from the cJ position to the FRESHJ position. At this time, the amount of vaporized alcohol contained in the air near the opening 40 is very small, so the occupants will not feel any alcohol odor.

Next, the interrupt processing of the vehicle washer odor intrusion prevention device 10 will be explained with reference to FIG. Note that the interrupt routine shown in FIG.
．． 98 is operated.

In step 132, it is determined whether the switch operated by the occupant is the switch 98 that designates the outside air introduction mode. If the determination in step 132 is affirmative, it is determined in step 134 whether the position of the inside/outside air switching damper 50 is a position corresponding to rRECJ.

If the determination in step 134 is affirmative, step 13
6, the actuator 54 is controlled to move the inside/outside air switching damper 50 to the position corresponding to rFREsHJ, and the process ends. The process also ends if the determination at step 134 is negative.

Further, if the determination in step 132 is negative, in step 138 the position of the inside/outside air switching damper 50 is set to rFRES.
It is determined whether the position corresponds to HJ. Step 138
If the determination of
It is moved to the position corresponding to J and the process ends. Also,
The process also ends if the determination at step 138 is negative.

Therefore, the intake mode selection switch 96.9 can be selected by the occupant.
8 is operated, the processing of the interrupt routine is performed with priority over the processing of the flowchart shown in FIG. will be introduced.

In this way, in this embodiment, when the window washer switch 38 is operated, the air inside the vehicle is transferred to the ventilation duct 48.
Since the actuator 54 is controlled so that the windshield is guided inside, the passenger will not feel any strange odor even if the window washer device 26 is activated.

In this embodiment, after detecting the operation of the window washer switch 38, the alcohol concentration, the glass surface temperature, and the position of the damper for switching between inside and outside air were checked in sequence. The order is not limited, and the order of check processing may be changed.

〔Effect of the invention〕

As explained above, in the present invention, when it is determined that the washer odor will intrude and the inside/outside air switching damper is in a position to guide the air outside the vehicle interior to the air guide path, the time period corresponding to the period during which the washer odor intrudes into the interior of the vehicle is determined. Since the inside/outside air switching damper is moved to the position where it guides the air inside the vehicle interior, an excellent effect can be obtained in that the occupants will not feel any strange odor even if the window washer device is activated.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the vicinity of the windshield glass of a vehicle to which the vehicle washer odor room intrusion prevention device according to the present embodiment is installed, and Fig. 2 is a diagram of the vehicle washer odor room intrusion prevention device and the vehicle air conditioner. Schematic configuration diagram, Figures 3 and 4
The figure is a flowchart explaining the operation of this embodiment, and FIG. 5 is a diagram showing the relationship between the vehicle speed and the switching time of the inside/outside air switching damper. 10...Vehicle washer odor intrusion prevention device, 12
...vehicle air conditioner, 24...washer fluid injection port, control circuit, window washer switch, outside air intake duct, inside/outside air switching damper, actuator.

Claims (1)

[Claims] (1) an inside/outside air switching damper that is provided in the middle of an air guide path that introduces air into the vehicle interior and is moved to selectively guide air inside the vehicle interior and air outside the vehicle interior to the air guide path; An actuator for moving the inside/outside air switching damper, and a vehicle odor intrusion prevention device that is attached to a vehicle air conditioner and is provided to prevent washer odor from entering the vehicle interior when air from outside the vehicle is introduced. a determination means for determining whether or not the air is present; a position detection means for detecting the position of the inside/outside air switching damper; a prediction means for predicting a period during which the washer odor will enter the vehicle interior when air from outside the vehicle is introduced; the position where the inside/outside air switching damper guides the air inside the cabin for a period corresponding to the period when it is determined that the odor of washer is intruding by the means and the inside/outside air switching damper is in a position where it guides the air outside the cabin to the air guide path; A vehicle odor odor intrusion prevention device comprising: a control means for controlling an actuator to move the vehicle.