JPH0825949A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To prevent foul air from entering the vehicle interior by comparing the output of exhaust gas sensors installed at outside air lead-in ports in plural places, and taking outside air into the vehicle from the outside air lead-in port with lower output. CONSTITUTION:When a nap mode is selected, an inside-outside air switching damper 3 is placed in an outside air mode. The output of exhaust gas sensors A11, B12 are compared. Between dampers A13, B14, the damper corresponding to the exhaust gas sensor with lower output is opened, and the damper corresponding to the exhaust gas sensor with higher output is closed. Only the outside air on the lowest side of exhaust gas concentration enters the vehicle interior 10. When both output of the exhaust gas sensors A11, B12 become the regulated value or more, a regulated value judging means outputs a signal to an alarm to generate an alarm. Foul air is thereby prevented from entering the vehicle interior.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art One example of a conventional vehicle air conditioner is a schematic plan view of a vehicle 1 shown in FIG.

In the figure, 2 is a blower, 3 is an inside / outside air switching damper, 4 is an outside air suction port, and 6 is an inside air suction port. Normally, the inside / outside air switching damper 3 is selected automatically or by an operation of an occupant, sucked by the blower 2 from the outside air suction port 4 or the inside air suction port 6, cooled by the evaporator 7, heated by the heater 8, and blown into the vehicle interior 10. It In the figure, 9 is an air mix damper.

[0004]

The above-mentioned conventional vehicle air conditioner has the following problems to be solved.

That is, in the conventional air conditioner for a vehicle, when the air conditioner is operated while the vehicle is stopped and a nap or the like is taken inside the vehicle, the inside / outside air switching damper may be selected automatically or by an operation of an occupant to enter the inside air mode. However, there is a problem that the air inside the vehicle is easily polluted when the vehicle is operated in the inside air mode for a long time.

Further, in the outside air mode, since the outside air inlet is constant, there is a problem that it is difficult to avoid it even if exhaust gas of another vehicle easily enters. Particularly in recent years, cases of taking a nap in the car from the midnight to the early morning in a parking lot of a ski resort are increasing, and the above-mentioned problems seriously affect the health of passengers and the like.

It is an object of the present invention to provide a vehicle air conditioner that solves the above problems.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle air conditioner as described in (1) and (2) below as a means for solving the above problems.

(1). In an air conditioner for a vehicle that sucks the inside air or the outside air inside the vehicle compartment by switching the inside / outside air switching damper, the outside air inlet is provided at a plurality of places, and an exhaust gas sensor and an opening / closing damper are installed at each outside air inlet. Comprising a damper control means for comparing the outputs of the exhaust gas sensors and setting the open / close damper of the outside air introduction port of the lowest output to open the outside air at the time of setting the nap mode in which the inside / outside air switching damper is set to the outside air mode. A vehicle air conditioner characterized by the above.

(2). The vehicle air conditioner according to (1) above, further comprising alarm means for giving an alarm when the output of the exhaust gas sensor is equal to or higher than a regulation value.

Here, the output of the exhaust gas sensor corresponds to the exhaust gas concentration.

[0012]

Since the present invention is constructed as described above, it has the following actions.

(1). In the configuration of (1) above, the vehicle is provided with a plurality of outside air inlets for air conditioning, an exhaust gas sensor and an opening / closing damper are installed at each outside air inlet, and the inside / outside air switching damper is set to the outside air mode when the nap mode is set. Since the damper control means that opens the open / close damper on the side with the lowest output of the exhaust gas sensor and introduces the outside air is provided, only air with a low exhaust gas concentration enters the inside of the vehicle at all times, and the air inside the vehicle is kept fresh even when the vehicle is stopped. Be drunk

(2). In the configuration of (2) above, the exhaust gas sensor of the configuration of (1) above is provided with the alarm means for giving an alarm when the output is equal to or higher than the regulation value. Therefore, if the alarm means operates, the outside air is immediately cleaned. It is possible to take measures such as moving the vehicle to a location, and the occupants and the like do not have any problems such as breathing air having a high exhaust gas concentration without knowing.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals,
The description is omitted except when necessary.

FIG. 1 is a schematic plan sectional view of the present embodiment, FIG. 2 is a flow chart of the present embodiment, and FIG. 3 is a detailed view when an alarm is issued by the alarm of FIG.

In FIG. 1, 4 is an outside air intake port A of an outside air passage 15a extending to the left front side of the vehicle 1, and 5 is an outside air intake port B of an outside air passage 15b extending to the right side of the vehicle 1. An exhaust gas sensor A provided inside the vicinity of the outside air intake port A4, an exhaust gas sensor B provided inside the vicinity of the outside air intake port B5, an opening / closing damper A provided in the middle of the outside air passage 15a, and an outside air damper 14 provided inside the outside air passage 15a. An opening / closing damper B, 15a provided in the middle of the passage 15b is an outside air passage communicating from the outside air inlet A4 to a portion of the inside / outside air switching damper 3, and 15b is an outside air passage immediately before the inside / outside air switching damper 3 from the outside air inlet B5. It is an outside air passage that communicates with a portion where it merges with 15a.

Other configurations are similar to those of the conventional example.

Next, the operation of the above construction will be described first with reference to FIGS.

First, the nap mode is selected to set the inside / outside air switching damper 3 to the outside air mode. Next, the outputs of the exhaust gas sensor A11 and the exhaust gas sensor B12 are compared, and the opening / closing damper with the lower output is opened and the opening / closing damper with the higher output is closed. As a result, only the outside air having the lowest exhaust gas concentration enters the vehicle interior 10. Exhaust gas sensors A11, B1
If the output of 2 is above the regulation value, an alarm (not shown) is issued to notify the passenger. The conceptual diagram is shown on the right side of FIG. In the figure, the opening / closing damper B14 on the exhaust gas sensor B side is opened, and the opening / closing damper A13 is closed.

FIG. 3 is a detailed flow chart when an alarm is issued by an alarm. Exhaust gas sensors A and B correspond to the exhaust gas sensor A11 and exhaust gas sensor B12, respectively, and damper motors A and B respectively show an opening / closing damper A13 and an opening / closing damper B14. Not compatible with damper motors. The alarm 16 is called up only in this figure.

In the nap mode, the outputs of the exhaust gas sensors A and B are compared by the comparison means, and the signal is output so that the damper selection means opens the opening / closing damper on the low output side and closes the opening / closing damper on the high output side. A signal is issued to the means to drive the corresponding damper motors A and B.

On the other hand, when the signal from the comparison means is always input to the regulation value determination means and the output of each of the exhaust gas sensors A and B exceeds the regulation value, that is, any opening / closing damper is selected, the inside of the vehicle is selected. When the exhaust gas concentration unsuitable for being sent to 10, the regulation value determination means issues a signal to the alarm 16 to issue an alarm.

As described above, according to the present embodiment, when the occupant of the vehicle 1 operates the air conditioner while the vehicle is stopped by taking a nap or the like, one of the outside air intake ports A4 and B5 on the front side and the right side of the vehicle 1 is operated. Since only the outside air having a low exhaust gas concentration is taken into the vehicle interior 10 as the conditioned air, there is an advantage that the air inside the vehicle is not contaminated.

In addition, it is determined whether the exhaust gas concentration of the intake air on either side is always within the regulation value as the sensor output, and when both of them reach the regulation value or more, the alarm 16 immediately gives an alarm. Therefore, there is an advantage that there is no concern about breathing air having a high exhaust gas concentration and becoming dangerous even if the user is sleeping for a while.

In this embodiment, the outside air intake ports A4 and B are used.
When both of the exhaust gas sensors A11 and B12 for both outside air of No. 5 are above the regulation value, the alarm 16 gives an alarm. However, for the sake of safety, immediately if any of the sensors exceeds the regulation value, It is free to activate the alarm means.

[0027]

The present invention has the following effects because it is configured as described above.

That is, in the present invention, an exhaust gas sensor and an opening / closing damper are installed at a plurality of outside air inlets, the outputs of the exhaust gas sensors are compared, and the outside air inlet having a lower output (clean air) is always used. The outside air can be taken into the vehicle, and dirty air does not enter the inside of the vehicle before it is noticed, and it is possible to comfortably spend a long time in the vehicle even when the vehicle is stopped.

Further, when the output of the exhaust gas sensor exceeds the regulated value, the alarm means gives an alarm, so that even if the user is in a nap, tentatively, or sleeping deeply, he / she immediately wakes up and responds, so that dirty air is not sucked.

[Brief description of drawings]

FIG. 1 is a schematic plan sectional view of a vehicle air conditioner according to an embodiment of the present invention,

FIG. 2 is a flowchart of the above embodiment,

FIG. 3 is a detailed diagram when an alarm is issued by the alarm of FIG.

FIG. 4 is a schematic plan sectional view of a conventional vehicle air conditioner.

[Explanation of symbols]

 3 Inside / outside air switching damper 4 Outside air inlet A 5 Outside air inlet B 11 Exhaust gas sensor A 12 Exhaust gas sensor B 13 Open / close damper A 14 Open / close damper B

Claims (2)

[Claims] 1. An air conditioner for a vehicle, which air-conditions the inside of a vehicle by sucking the inside air or the outside air by switching the inside / outside air switching damper, wherein an outside air inlet is provided at a plurality of places, and an exhaust gas sensor and opening / closing are provided at each outside air inlet. While installing the damper,
A damper control means is provided for comparing the outputs of the exhaust gas sensors when setting the nap mode in which the inside / outside air switching damper is set to the outside air mode and always introducing the outside air by opening the opening / closing damper of the outside air inlet having the lowest output. A vehicle air conditioner characterized by: 2. The vehicle air conditioner according to claim 1, further comprising alarm means for giving an alarm when the output of the exhaust gas sensor is equal to or higher than a regulation value.