JP2010018161A - Vehicular ventilator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular ventilator capable of rapidly determining acceptance/rejection by using thresholds for various kinds of gases contained in the air outside a vehicle, and repeating the determination again according to the sensitivity or the taste of an individual even when acceptance is determined, and the outside air is taken in a cabin. <P>SOLUTION: A gas sensor 2 detects a plurality of kinds of gases outside a vehicle, and a computation means 8 controls an outside air switching device 11 by patterning a plurality of output signals from the gas sensor. A first control means 25 generates the outside air take-in signal when the concentration of the gas is determined to be within each threshold based on the threshold. A second control means 28 stores the output signal as a reference pattern when the outside air blocking mode is switched by an operation means 18 through the manual switching operation. A third control means 35 switches the mode to the outside air blocking mode even if the gas content is within each threshold when the patterned output signal is similar to the reference pattern. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention uses a gas sensor that detects a plurality of types of gas outside the vehicle and generates a plurality of output signals corresponding to the plurality of types of gas, and automatically takes in or does not take in air outside the vehicle. The present invention relates to a vehicle ventilator having an outside air switching device for switching between the two. In particular, the present invention is effective when applied to an inside / outside air switching device of a vehicle air conditioner that selectively introduces inside air and outside air.

  2. Description of the Related Art Conventionally, in an air conditioner for a vehicle, in order to prevent the exhaust gas from entering the vehicle and improve the feeling of passengers, gas components (pollutants) such as HC, CO, and NOx in the exhaust gas are exhausted. Some are detected by sensors.

  Then, based on the sensor signal, when the concentration of the gas component exceeds the threshold value, the inside / outside air door is automatically controlled to have a so-called auto inside / outside air switching function that prevents the exhaust gas from entering the vehicle interior. There is something.

  As an exhaust gas sensor, a semiconductor gas sensor using SnO2 as a substrate as a base material is generally used. When this semiconductor gas sensor is heated to about 400 ° C. and reacts with a so-called reducing gas such as HC and CO, its resistance value decreases, and when it reacts with a so-called oxidizing gas such as NO 2, its resistance value increases. Has characteristics. Therefore, the presence or absence of exhaust gas can be detected based on such characteristics.

  Then, when such gas sensors having a plurality of sensor elements are used and the concentrations of a plurality of types of gases are detected and the concentrations of the respective gases exceed a threshold value, the inside / outside air switching door of the inside / outside air switching device is opened. What is automatically controlled is known.

The threshold value is changed by a specific factor called vehicle acceleration so that the concentration is determined using the threshold value and more accurate control is performed. (For example, refer to Patent Document 1).
JP 2006-56450 A

  However, this conventional one cannot sufficiently cope with the sensitivity or preference of passengers to personal gas.

  This is because it is difficult for the gas sensor to detect the odor-causing substance itself, and there is a considerable range in personal gas sensitivity or preference.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to use a threshold value for various gases contained in the air outside the vehicle quickly and successfully. Therefore, even if it is determined to be good, an object of the present invention is to provide a vehicle ventilator that can perform the determination again according to individual sensitivity or preference.

  In order to achieve the above object, the present invention employs the following technical means.

  That is, in the first aspect of the invention, the vehicle ventilator having the outside air switching device (11) for switching between the outside air introduction mode for taking in air outside the vehicle into the vehicle interior and the outside air shut-off mode for blocking outside air introduction. A gas sensor (2) that detects a plurality of types of gas outside the vehicle and generates a plurality of output signals corresponding to the plurality of types of gas, and a plurality of output signals from the gas sensor (2) are input to obtain a signal. A calculation means (8) for generating and controlling the outside air switching device (11), and an operation means (18) for generating an operation signal which is operated in the passenger compartment by the vehicle occupant and manually switches the outside air switching device (11). The calculation means (8) includes a first control means (25), a second control means (28), and a third control means (35), and the first control means (25) is set. Multiple types using thresholds Whether the air outside the vehicle is good or bad is judged from the force signal, and when it is judged good, an outside air intake signal for switching the outside air switching device (11) to the outside air introduction mode is generated, and the second control means (28) Generates a priority signal for switching to the outside air blocking mode when the outside air switching device (11) is manually switched to the outside air blocking mode by the operating means (18) when the outside air intake signal is generated, A plurality of types of output signals at this time are stored as reference data. When the reference data is stored, the third control means (35) allows the first control means (25) to store the air outside the vehicle. And when a plurality of types of output signals are determined to be similar based on the reference data, an outside air intake release signal for switching the outside air switching device (11) to the outside air blocking mode is generated. It is characterized in Rukoto.

  According to the first aspect of the present invention, the first control means can quickly and easily determine the quality of the air outside the vehicle using the set threshold value. The device (11) can be switched to the outside air introduction mode. Even when it is determined that the air outside the vehicle is good for the first time, the passenger does not manually take in the air outside the vehicle by operating the operation switch while driving the vehicle due to a difference in personal sensitivity or preference. May switch to the side. In view of such switching, the second control means (28) stores a plurality of output signals as reference data in order to learn the situation at this time. Therefore, after that, when a similar situation occurs, it is automatically determined by the third control means (35) that the plurality of output signals are similar based on the reference data, and the outside air blocking mode is set. Can be switched to.

  In the second aspect of the invention, the gas sensor (2) detects a plurality of types of gases outside the vehicle, generates a plurality of output signals according to the concentrations of the respective gases, and the calculation means (8) A plurality of output signals from (2) are input, and has a patterning means for patterning the plurality of output signals to generate a patterned output signal. The first control means is a gas sensor (2) When the concentration of each gas is a concentration within each threshold, the outside air intake signal for switching the outside air switching device (11) to the outside air introduction mode is generated by the threshold corresponding to the plurality of output signals, and the second control means When an outside air intake signal is generated, a priority signal for switching to the outside air blocking mode is generated when the outside air switching device (11) is manually switched to the outside air blocking mode by the operating means (18). At the same time, the patterned output signal at this time is stored as a reference pattern serving as reference data, and the third control means (35) has the concentration of each gas within each threshold value when the reference pattern is stored. When the patterned output signal is similar to the reference pattern, an outside air intake release signal for switching the outside air switching device (11) to the outside air blocking mode is generated.

  According to the second aspect of the invention, since the means for patterning a plurality of output signals from the gas sensor is provided, the patterned output signal is stored as a reference pattern serving as reference data. Therefore, it is possible to determine whether the patterned output signal is similar to the reference pattern using a widely known pattern recognition technique, which contributes to diversification and accuracy of the similarity determination.

  According to a third aspect of the present invention, the vehicle ventilation device includes a vehicle air conditioner that takes in air outside the vehicle and air-conditions the interior of the vehicle, and the outside air switching device (11) transmits the air to be conditioned from the outside of the vehicle. The inside / outside air switching device (11) is configured to switch the outside air introduction port side that is the outside air introduction mode side to be taken in or the inside air introduction port side that is the outside air blocking mode side that takes in air to be conditioned from the vehicle interior side.

  According to the third aspect of the invention, the inside / outside air switching of the vehicle air conditioner can be performed more accurately.

  In the invention according to claim 4, the gas sensor (2) is composed of a set of a plurality of different sensor elements (2a, 2b, 2c, 2d, 2e), and each sensor element (2a, 2b, 2c, 2d, 2e) is characterized in that it detects gases with different characteristics and generates individual output signals according to the concentration of the gases.

  According to the fourth aspect of the present invention, the gas can be detected in a multifaceted manner using various sensor elements (2a, 2b, 2c, 2d, 2e).

  The invention according to claim 5 is characterized in that each of the plurality of output signals is represented by a vector, and the leading end portion of the vector is bridged and patterned.

  According to the fifth aspect of the present invention, patterning can be facilitated by forming a plurality of output signals into figures using vectors.

  In the invention according to claim 6, whether or not the patterned output signal is similar to the reference pattern is determined by whether the patterned output signal is within the upper and lower limit regions set based on the reference pattern. It is characterized by being determined by no.

  According to the sixth aspect of the present invention, the similarity determination can be easily performed.

  In the invention according to claim 7, when the vehicle position specifying device (40) is provided in the vehicle and the second control means (28) stores plural kinds of output signals as reference data, the vehicle In the position specifying device (40), the information of the area of the specific area where the vehicle is traveling is stored.

  According to the seventh aspect of the present invention, the information on the area of the specific area where the occupant is concerned about the smell and the operating means (18) is operated can be stored and utilized in the vehicle position specifying device. .

  In the invention according to claim 8, when the vehicle position specifying device (40) is provided in the vehicle and the second control means (28) stores the patterned output signal as a reference pattern, In the vehicle position specifying device (40), information on a region of a specific area where the vehicle is traveling is stored.

  According to the eighth aspect of the present invention, it is possible to store and use the information on the area of the specific area where the operating means (18) is operated because the occupant cares about the odor and is operated in the vehicle position specifying device. .

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. This embodiment is a vehicle ventilator that includes a vehicle air conditioner that air-conditions a vehicle interior. The outside air introduction side corresponds to the outside air introduction mode side that takes in air to be conditioned from outside the vehicle, and the inside air introduction side corresponds to the outside air blocking mode side that takes in air to be conditioned from the vehicle interior side.

  FIG. 1 is a schematic diagram of a vehicle including a vehicle air conditioner as a first embodiment. A gas sensor 2 is provided in the vicinity of the air intake portion into the engine room in front of the vehicle. In this gas sensor 2, a plurality of different sensor elements 2a, 2b, 2c, 2d, and 2e are provided in a single gas sensor as shown in FIG. Thereby, it is possible to output different outputs corresponding to various gases contained in the air.

  For this purpose, sensor elements having the same principle but different characteristics and sensitivity may be provided side by side. For example, odors to be detected include odors of fatty acids, ammonia, amines, aldehydes, aromatics, hydrocarbon HC, hydrogen sulfide H2S, and the like.

  As shown in FIG. 2, five sensor elements that react to these gases and have different characteristics are housed in one case 3. Here, the signal of each sensor element may be transmitted to an electronic control unit (ECU) 8 serving as a calculation means by a large number of wires, but in this embodiment, it is transmitted by multiplex communication. For this purpose, a circuit portion 4 is provided in the case 3. The circuit unit 4 accommodates an amplifier that amplifies the signal from each sensor element, and a communication unit that multiplexes the signal from each sensor element and supplies it as a multiplexed signal within one signal line. ing. And the electronic control unit 8 which makes a calculating means, and the gas sensor 2 are couple | bonded by the bidirectional | two-way multiple communication line 9. FIG.

  The gas sensor 2 includes a plurality of sensor elements that use SnO2, which is a semiconductor element, as a base material. This is roughly divided into two types. One type of sensor element has a low resistance value when it reacts with a reducing gas such as HC or CO among pollutants contained in the outside air. An HC signal that is a detection signal indicating the resistance value of the sensor element is output from the common connection terminal of the sensor element and the reference resistance element.

  The other type of sensor element has a high resistance value when it reacts with an oxidizing gas such as NOx among pollutants contained in the outside air. The sensor element and the reference resistance element are connected in series between the positive terminal of the electronic control unit 8 and the ground. Therefore, a NOx signal that is a detection signal indicating the resistance value of the sensor element is output from the common connection terminal of the sensor element and the reference resistance element.

  Here, an electric heater for heating each sensor element to about 400 ° C. is provided. This is to keep each sensor element in a state of reacting with a reducing gas, an oxidizing gas, or the like.

  In this embodiment, these two types of sensors having different characteristics are combined, and three sensor elements that output HC signals and two sensor elements that output NOx signals are combined. The same gas detection principle with different characteristics is selected.

  Next, it demonstrates using FIG. FIG. 3 is a block diagram showing the relationship between the calculation means in the vehicle air conditioning control device and the inside / outside air switching device. As shown in FIGS. 1 and 3, the inside / outside air switching device 11 is configured such that the damper 13 driven by the servo motor 12 pivots between the vehicle front side and the vehicle rear side to switch the operation.

  When the damper 13 is positioned on the rear side of the vehicle, an outside air introduction mode for taking air outside the vehicle into the vehicle interior 16 via the electric blower 15 is executed. In this case, the suction side of the blower 15 communicates with the outside air inlet.

  An operation panel is provided at the steering portion, and an operation switch 18 serving as an operation means for generating a signal for forcibly switching the outside air introduction mode of the outside air switching device 11 by manual operation is provided therein. .

  A signal from the gas sensor 2 is patterned by a patterning means 36 in an electronic control unit (ECU) 8 that constitutes a calculation means. FIG. 4 shows an example, and signals output from the five sensor elements 2a, 2b, 2c, 2d, and 2e are displayed as vectors having different directions.

  The vector 2aV is a signal detected by the sensor element 2a, and the vector 2bV is a signal detected by the sensor element 2b. Similarly, the vector 2cV is a signal detected by the sensor element 2c, the vector 2dV is a signal detected by the sensor element 2d, and the vector 2eV is a signal detected by the sensor element 2e. And as shown in FIG. 5, the shape where each vector front-end | tip part was bridged is made into a pentagon. In other words, each of the plurality of output signals is represented by a vector, and the tip portion of the vector is bridged to be patterned as a whole.

  3 in FIG. 3 is a threshold value storage memory in which the threshold value 21 shown in FIGS. 4 and 5 is stored in advance. The threshold value 21 stored in the threshold value storage memory 20 is also set to a pentagon centered on the origin of the vector as shown in FIGS.

  Ideally, it would be desirable for each of these sensor elements to specifically react to a particular, different, targeted material, but in this embodiment, sensors with different characteristics that react to reducing and oxidizing gases. 5 elements are combined.

  The calculation means of FIG. 3 is formed by a microcomputer in the air conditioning control device. The first control means 25 in this calculation means determines whether or not all the tips of the vectors fall within the zone formed from the threshold value 21 in the threshold value storage memory 20.

  And when all are settled like FIG. 4, the outside air taking-in signal is generated. As a result, the servo motor 12 of the inside / outside air switching device 11 is driven, and the damper 13 is driven to the outside air introduction port side which is the outside air introduction mode side to execute the outside air introduction mode.

  Further, when the tip of any one vector penetrates the zone formed by the threshold value 21, an outside air intake release signal is transmitted to the inside / outside air switching device 11. As a result, the servo motor 12 is driven, and the damper 13 is driven to the inside air introduction side which is the outside air blocking mode side, and the inside air circulation mode is executed. In this case, the suction side of the blower 15 communicates with the inside air inlet. In this way, it is possible to automatically limit the intake of outside air when the odor of gas outside the vehicle is strong during traveling.

  Here, even if the vehicle travels in the vicinity of the livestock facility, the tip of each vector may be entirely contained in the zone formed from the threshold value 21, and the damper 13 may continue to be maintained on the outside air inlet side. In such a case, the occupant may feel odor due to a difference in sensitivity or preference to the odor of the occupant, dislike taking in outside air, and operate the operation switch 18 in the operation panel.

  When such a manual switching signal is issued from the operation switch 18, the second control means 28 preferentially generates a priority signal to the inside / outside air switching device 11 and switches to the inside air inlet side.

  Here, the operation switch 18 is manually operated so that the occupant feels odor and does not take in the outside air in the outside air introduction mode that is automatically controlled to the outside air inlet side by the signal from the gas sensor 2. The case of the inside air circulation mode will be described.

  In this case, the second control means 28 issues a command to the reference pattern storage memory 30 to capture the output signal of the gas sensor 2 at that time as the reference pattern 31 (FIG. 5) serving as reference data.

  In this way, the reference pattern 31 is stored. Thereafter, when the manual operation by the operation means 18 is completed, the operation mode returns to the automatic operation mode. Therefore, in this automatic operation mode, as described above, when the first control means 25 determines that all the tips of the vectors are all within the zone formed from the threshold value 21, the damper 13 is introduced into the outside air. Drives to the mouth side automatically.

  In this case, the third control unit 35 performs pattern recognition for determining similarity between the pattern of the output signal of the gas sensor 2 and the reference pattern 31 stored in the reference pattern storage memory 30. As this pattern recognition, various known methods can be adopted. In FIG. 5, an upper limit side pattern 31 a and a lower limit side pattern 31 b are set inside and outside the pentagonal pattern stored as the reference pattern 31.

  In addition, when the pattern of the output signal of the gas sensor 2 at that time is within the region sandwiched between the upper limit side pattern 31a and the lower limit side pattern 31b, it is determined to be similar, and the pattern does not fit but protrudes. Is determined to be dissimilar.

  When it is determined that they are similar, the third control unit 35 issues an outside air intake release signal to the inside / outside air switching device 11. As a result, even if the operating means 18 is not operated, the damper 13 of the inside / outside air switching device 11 is automatically driven to the inside air introduction side, and the inside air circulation mode is executed.

  Further, the electronic control unit 8 has a microcomputer, and the blower volume of the blower 15 is controlled by adjusting the voltage applied to the blower motor by the output signal from the microcomputer and adjusting the motor rotation speed. Other actuators are also controlled by a drive circuit based on an output signal from the microcomputer.

  An operation signal is input to the microcomputer from an air conditioning operation panel installed in the vehicle interior instrument panel. This air conditioning operation panel is also used as an auto switch for setting the automatic control state of the air conditioner, and the above-described operation means 18 of the present invention, and switches to the internal air circulation mode which is also the automatic operation mode, the external air introduction mode or the external air cutoff mode An inside / outside air changeover switch 18 for setting, a blowout mode changeover switch for manually setting the blowout mode, an airflow amount changeover switch for manually setting the airflow rate of the fan, and the passenger compartment temperature A temperature setting switch or the like for setting the desired temperature is provided.

  In addition, signals from various sensors that detect environmental conditions that affect the air conditioning state in the passenger compartment are input to the microcomputer. In particular, a detection signal output from the gas sensor 2 that detects the concentration of the pollutant contained in the outside air is input, and in some cases, a signal from the car navigation device 40 serving as a vehicle position specifying device is connected bidirectionally.

  Next, the operation will be described. In the automatic control state of the air conditioner (during automatic operation), a target blowing temperature (hereinafter referred to as TAO) of air blown into the passenger compartment is calculated based on the set temperature, environmental condition signal, and the like read as is well known. Next, the blower voltage that determines the blown amount is determined based on the TAO. Next, based on TAO, the blowing mode by opening and closing the blowing mode door is determined.

  Next, the opening degree of the air mix door with respect to TAO is calculated. Next, when the operating means (inside / outside air switching switch) 18 is set to the automatic operation mode, the inside / outside air suction mode by the inside / outside air switching door is determined based on the detection signal of the gas sensor. In other words, the outside air introduction mode or the inside air circulation mode is determined as described above. In the present embodiment, when the automatic operation mode is set, the following operation will be described on the assumption that the damper 13 is driven to the initial position in the outside air introduction mode.

  Next, the control for determining the inside / outside air suction mode will be described based on a flowchart. In FIG. 6, control for automatically determining the inside / outside air suction mode by the inside / outside air switching door based on the detection signal of the gas sensor is started in step S1.

  In step S2, the damper 13 is driven to its initial position, and the outside air introduction mode is set. Next, in step S3, a plurality of output signals of the gas sensor are read. Next, the plurality of read output signals are patterned in step S4. This step S4 corresponds to the patterning means 36 for patterning a plurality of output signals in FIG.

  In step S5, it is determined whether or not the reference pattern 31 is stored in the reference pattern storage memory 30. If not stored, the process proceeds to step S8 via step S6 in FIG. 7, and the output signals G1 to GN patterned here and the threshold value 21 are compared.

  In step S8, if any of the output signals G1 to GN is greater than the threshold value 21, it is determined that the odor is strong. Therefore, in this case, in step S9, the mode is switched to the inside air circulation mode which is the outside air blocking mode. Steps S8 and S9 correspond to the first control means 25.

  In step S8, when all the patterned output signals G1 to GN are smaller than the threshold value 21 (NO in step 8), the process proceeds to step S10. In this step S10, it is determined whether or not a manual operation for selecting the inside air circulation mode has been performed by the operation switch 18 during the automatic operation in the outside air introduction mode.

  If the manual operation is performed, the patterned output signal at this time is stored in the reference pattern storage memory 30 as a reference pattern 31 serving as reference data in step S11. In step S12, the mode is switched to the inside air circulation mode.

  If there is no manual operation, the outside air introduction mode is maintained in step S13, and the process returns to step S0. Step S11 for storing the pattern in accordance with this manual operation and step S12 for switching to the inside air circulation mode constitute the second control means 28.

  Next, in FIG. 6, when the reference pattern 31 is stored in the memory 30, the process proceeds to step S14 in FIG. Then, the output signals G1 to GN patterned in step S15 are compared with the threshold value 21.

  When any one of the output signals G1 to GN is larger than the threshold value 21, the first control unit 25 determines that “the odor is strong”. Therefore, in this case, in step S16, the mode is switched to the inside air circulation mode, and the process returns in step S0. If the patterned output signals G1 to GN are all smaller than the threshold value 21, it is determined whether there is a similar pattern registered in step S17.

  If there is a similar pattern and the answer is YES, the process proceeds to step S16, and the inside air circulation mode is executed. Next, if there is no similar pattern in step S17, the process proceeds to step S18. In step S18, it is determined whether or not a manual operation for selecting the inside air circulation mode is operated by the operation switch 18 during the automatic operation in the outside air introduction mode.

  When the manual operation is performed by the operation switch 18, the process proceeds to step S19. Then, the patterned output signal at this time is stored in the reference pattern storage memory 30 as the reference pattern 31 serving as reference data, and the data is updated. In step S20, the mode is switched to the inside air circulation mode.

If the manual operation is not operated by the operation switch 18, the outside air introduction mode is maintained in step S21, and the process returns to step S0. Step S19 in which the pattern is stored and updated in accordance with the manual operation and step S20 to switch to the inside air circulation mode together with the above-described steps S11 and S12 constitute the second control means 28.
(Second Embodiment)
In the first embodiment, the inside air circulation mode and the outside air introduction mode are switched based on information from only the gas sensor regardless of the target outlet temperature TAO (hereinafter simply referred to as TAO). The outside air introduction mode may be provisionally determined. A semi-inside air circulation mode may be provided between the inside air circulation mode and the outside air introduction mode.

  Hereinafter, the difference from the first embodiment will be described. In this case, as TAO changes from the low temperature side to the high temperature side, provisional settings are made such as the inside air circulation mode, the semi-inside air circulation mode, and the outside air introduction mode. Here, in a situation where the inside air circulation mode is provisionally determined by TAO, the inside air circulation mode is selected as it is.

  On the other hand, in the situation where the outside air introduction mode or the semi-inside air circulation mode is selected by TAO, the control of step S1 in FIG. 6 is started.

In step S2, the damper 13 is driven to a position where the outside air introduction mode or the semi-inside air circulation mode is set. Thereafter, the same processing as in the first embodiment is performed from step 3 in FIG. 6 to each step in FIG. 7 or FIG. However, in step S13 and step S21, the outside air introduction mode or the semi-inside air circulation mode is maintained.
(Third embodiment)
Next, the third embodiment will be described, particularly with respect to the differences from the first embodiment. This embodiment is used for a vehicle equipped with a vehicle position specifying device capable of detecting vehicle travel position information using a GPS signal or the like, such as a car navigation device. Hereinafter, description will be made with reference to FIG.

In the map data of the vehicle position specifying device 40, information on the area of the specific area can be registered as data in a memory such as a RAM by an input signal described later. When the pattern is stored in step S11 of FIG. 7 or step S19 of FIG. 8, the second control means 28 sends an input signal to the vehicle position specifying device 40 as shown by the one-dot chain line in FIG. Input to the vehicle position specifying device 40. As a result, in the map data of the vehicle position specifying device 40, information on the area of the specific area is registered in the memory as data.
Therefore, by using this data, it is possible to display information on the area of the specific area on a display (not shown) of the vehicle position specifying device. Thereby, when the route to the destination is determined, the occupant can bypass the area of the specific area.

Further, when the information on the area of the specific area of the map data of the vehicle position specifying device 40 is used and the vehicle enters the area of the specific area, the outside air introduction mode is forcibly switched to the inside air circulation mode. It becomes possible.
(Other embodiments)
Note that the similarity determination may be made only by analyzing the numerical data without patterning a plurality of signals from the gas sensor.

  The gas sensor is composed of a set of a plurality of different sensor elements, and it is desirable that each sensor element mainly detects each type of gas and generates an individual output signal corresponding to the concentration of the gas. Further, the number of sensor elements is preferably three or more for pattern formation, but may be configured with two.

  Moreover, although what has an inside air circulation mode was described, for example, in a bus | bath, it can be used for the apparatus by which it is selected whether outside air is taken in or not. In this case, the damper switches between opening and closing of the outside air inlet. Then, the outside air inlet is opened by the outside air intake signal. In addition, when the outside air introduction port is opened, the outside air introduction port is closed when an outside air intake release signal is issued.

It is a schematic diagram of the motor vehicle carrying the vehicle air conditioner used as the vehicle ventilator by one Embodiment of this invention. It is a schematic wiring diagram of the gas sensor used for one embodiment. It is a block diagram which shows the whole structure of one Embodiment. It is a model diagram which shows typically the state where the density | concentration of each gas is a density | concentration in each threshold value as a result of determining gas concentration by one Embodiment. In one Embodiment, it is a schematic diagram which shows typically the state which pattern-recognizes the several output signal of a gas sensor, and determines whether it is similar to a reference pattern. It is a flowchart of the part which discriminate | determines the presence or absence of a reference pattern among the control means performed within a calculating means by one Embodiment. FIG. 7 is a flowchart continued from FIG. 6 when there is no reference pattern. FIG. 7 is a flowchart continued from FIG. 6 when there is a reference pattern.

Explanation of symbols

2 Gas sensor 2a, 2b, 2c, 2d, 2e Sensor element 8 Calculation means 11 Inside / outside air switching device 18 serving as outside air switching device 18 Operation switch 20 constituting operation means Threshold storage memory 25 First control means 28 Second control means 30 Reference pattern storage memory 31 Pattern 35 formed by bridging the front end of the vector Third control means 40 Car navigation device serving as vehicle position specifying device

Claims (8)

A vehicle ventilator having an outside air switching device (11) for switching between an outside air introduction mode for taking air outside the vehicle into a vehicle interior and an outside air blocking mode for blocking introduction of outside air,
A gas sensor (2) for detecting a plurality of types of gases outside the vehicle and generating a plurality of output signals according to the plurality of types of gases;
The plurality of output signals from the gas sensor (2) are input to generate a signal and control the outside air switching device (11); and the vehicle occupant manually operates the vehicle interior to An operation means (18) for generating an operation signal for switching the outside air switching device (11);
The calculation means (8) includes a first control means (25), a second control means (28), and a third control means (35),
The first control means (25) determines the quality of the air outside the vehicle from the plurality of types of output signals using a set threshold value, and when it is determined to be good, the outside air switching device (11). An outside air intake signal for switching to the outside air introduction mode,
When the outside air switching device (11) is manually switched to the outside air shut-off mode by the operation means (18) when the outside air intake signal is generated, the second control means (28) A priority signal for switching to the outside air shutoff mode is generated, and the plurality of types of output signals at this time are stored as reference data,
In the third control means (35), when the reference data is stored, the first control means (25) determines that the air outside the vehicle is good, and the plurality of types If the output signal is determined to be similar based on the reference data, an outside air intake release signal for switching the outside air switching device (11) to the outside air blocking mode is generated. The gas sensor (2) detects a plurality of types of gases outside the vehicle, and generates a plurality of output signals according to the concentration of each gas,
The computing means (8) has patterning means for patterning the plurality of output signals, to which the plurality of output signals from the gas sensor (2) are inputted, and generates a patterned output signal. ,
The first control means (25) controls the outside air switching device (11) when the concentration of each gas is a concentration within each threshold according to the threshold corresponding to the plurality of output signals of the gas sensor (2). An outside air intake signal for switching to the outside air introduction mode is generated,
The second control means (28) is configured to switch the outside air when the outside air switching device (11) is manually switched to the outside air blocking mode by the operation means (18) when the outside air intake signal is generated. A priority signal for switching to the cut-off mode is generated, and the patterned output signal at this time is stored as a reference pattern serving as the reference data,
When the reference pattern is stored, the third control means (35) is configured such that the concentration of each gas is a concentration within the respective threshold values, and the patterned output signal is the reference pattern. 2. The vehicle ventilation device according to claim 1, further comprising: generating an outside air intake release signal for switching the outside air switching device (11) to the outside air blocking mode. The vehicle ventilation device comprises a vehicle air conditioner that takes in air outside the vehicle and air-conditions the vehicle interior,
The outside air switching device (11) is an outside air introduction side that is an outside air introduction mode side that takes in air to be conditioned from outside the vehicle, or an inside air introduction port that is on the outside air cut-off mode side that takes in air to be conditioned from the vehicle interior side. The vehicle ventilation device according to claim 1 or 2, wherein the vehicle ventilation device is an inside / outside air switching device (11) for switching to the side.   The gas sensor (2) is composed of a set of a plurality of different sensor elements (2a, 2b, 2c, 2d, 2e), and each sensor element (2a, 2b, 2c, 2d, 2e) has the characteristics different from each other. The vehicle ventilator according to any one of claims 1 to 3, wherein the vehicle ventilator detects and generates individual output signals according to the concentration of the gas.   The vehicle ventilation device according to claim 2, wherein each of the plurality of output signals is represented by a vector, and the tip portion of the vector is bridged and patterned.   Whether or not the patterned output signal is similar to the reference pattern is determined by whether or not the patterned output signal falls within an upper and lower limit region set based on the reference pattern. The vehicle ventilation device according to claim 2, wherein the vehicle ventilation device is provided. A vehicle position specifying device (40) is provided in the vehicle,
When the second control means (28) stores the plurality of types of output signals as reference data, in the vehicle position specifying device (40), information on the area of the specific area where the vehicle is traveling is obtained. The vehicle ventilation device according to claim 1, wherein the vehicle ventilation device is stored. A vehicle position specifying device (40) is provided in the vehicle,
When the second control means (28) stores the patterned output signal as the reference pattern, in the vehicle position specifying device (40), the region of the specific area where the vehicle is traveling is stored. Information is memorize | stored, The ventilation apparatus for vehicles of Claim 2 characterized by the above-mentioned.

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