JP6665480B2 - Control device - Google Patents

Description

  The present invention relates to a control device.

  Conventionally, an air conditioner for a vehicle calculates an exhaust gas sensor that detects a gas concentration that is a contaminant component of the outside air, and calculates a gas concentration change rate according to a detection value of the exhaust gas sensor, and calculates the gas concentration change rate and a determination reference value. There is a device provided with a control device for controlling the inside / outside air switching door in comparison (for example, see Patent Document 1).

  When it is determined that the gas concentration is higher than the criterion value by comparing the gas concentration change rate with the criterion value, the inside / outside air switching door is controlled so as to open the inside air inlet and close the outside air inlet. On the other hand, when it is determined that the gas concentration is lower than the determination reference value, the inside / outside air switching door is controlled so as to open the inside air inlet and close the outside air inlet.

  Here, when the occupant's feeling does not match the control of the inside / outside air switching door, the control of the inside / outside air switching door is adjusted by manually adjusting the determination reference value.

Patent No. 3336917

  Generally, an occupant's sensation of smell changes depending on humidity and temperature conditions. For this reason, in the vehicle air conditioner, the switching control of the inside / outside air switching door cannot be adjusted to the sensation of the odor of the occupant which changes depending on the state of temperature and humidity.

  In view of the above, it is an object of the present invention to provide a control device that adjusts the switching control of the inside / outside air switching door to the occupant's feeling of smell.

In order to achieve the above object, according to the first aspect of the present invention, a door (35) that opens one of an outside air inlet (34) for introducing outside air and an inside air inlet (33) for introducing inside air and closes the other. ) And a casing (31) for circulating air introduced from one of the outside air inlet and the inside air inlet into the vehicle cabin, and controls the vehicle air conditioning unit (30).
A first determining unit (S220) for determining whether or not the gas concentration is equal to or higher than a threshold value based on a detection value of a gas sensor (67, 68) for detecting a concentration of a gas that causes odor in the outside air; When the first determination unit determines that the concentration of the gas is equal to or higher than the threshold value, the door is controlled to close the outside air introduction port and open the inside air introduction port, and the first determination unit determines that the gas concentration is less than the threshold value. When a determination is made, a control unit (S230) that controls the door to open the outside air introduction port and close the inside air introduction port with the door;
The temperature detected by the temperature sensor that detects the temperature of the inside air is repeatedly acquired, and each time the temperature detected by the temperature sensor is acquired, it is determined whether or not the previously acquired temperature and the currently acquired temperature are inconsistent. 2 determination unit (S170),
A first setting unit (S171) for setting a threshold value so as to lower the threshold value as the temperature of the inside air increases based on the detection value of the temperature sensor;
The temperature detected by the humidity sensor for detecting the humidity of the inside air is repeatedly acquired, and each time the humidity detected by the humidity sensor is acquired, it is determined whether or not the previously detected humidity and the currently acquired humidity are inconsistent. 3 determination unit (S190);
A second setting unit (S200) for setting a threshold value so as to lower the threshold value as the humidity of the inside air increases based on the detection value of the humidity sensor;
When the second determination unit determines that the previously acquired detection temperature and the currently acquired detection temperature do not match, the first setting unit sets a threshold,
When the third determination unit determines that the previously acquired detected humidity and the currently acquired detected humidity do not match, the second setting unit sets a threshold.

  According to the first aspect of the present invention, the threshold value decreases as the temperature of the inside air increases, and the threshold value decreases as the humidity of the inside air increases. Therefore, the switching control of the inside / outside air switching door can be adjusted to the sensation of the occupant about the smell.

In the invention described in claim 2, a door (35) that opens one of the outside air inlet (34) for introducing outside air and the inside air inlet (33) for introducing inside air and closes the other, A casing (31) for allowing air introduced from one of the inside air introduction ports to flow toward the vehicle interior, and a control device for controlling the vehicle air conditioning unit (30),
A first determination unit (S220) that determines whether or not the gas concentration is equal to or higher than a threshold based on a detection value of a gas sensor (67, 68) that detects a concentration of a gas that causes an odor in outside air;
When the first determination unit determines that the gas concentration is equal to or higher than the threshold value, the door is controlled to close the outside air introduction port and open the inside air introduction port with the door, and the first determination is made that the gas concentration is less than the threshold value. A control unit (S230) that controls the door to open the outside air introduction port and close the inside air introduction port by the door when the unit determines;
The temperature detected by the temperature sensor that detects the temperature of the inside air is repeatedly acquired, and each time the temperature detected by the temperature sensor is acquired, it is determined whether or not the previously acquired temperature and the currently acquired temperature are inconsistent. 2 determination unit (S170),
A setting unit (S171) for setting a threshold value so as to lower the threshold value as the temperature of the inside air increases based on the detection value of the temperature sensor;
When the second determination unit determines that the previously acquired detection temperature and the currently acquired detection temperature do not match, the setting unit sets a threshold value .

  According to the second aspect of the present invention, the threshold value decreases as the temperature of the inside air increases. Therefore, the switching control of the inside / outside air / inside / outside air switching door can be adjusted to the occupant's feeling about the smell.

According to the invention described in claim 3, a door (35) that opens one of the outside air inlet (34) for introducing outside air and the inside air inlet (33) for introducing inside air and closes the other, A casing (31) for allowing air introduced from one of the inside air introduction ports to flow toward the vehicle interior, and a control device for controlling the vehicle air conditioning unit (30),
A first determination unit (S220) that determines whether or not the gas concentration is equal to or higher than a threshold based on a detection value of a gas sensor (67, 68) that detects a concentration of a gas that causes an odor in outside air;
When the first determination unit determines that the gas concentration is equal to or higher than the threshold value, the door is controlled to close the outside air introduction port and open the inside air introduction port with the door, and the first determination is made that the gas concentration is less than the threshold value. A control unit (S230) that controls the door to open the outside air introduction port and close the inside air introduction port by the door when the unit determines;
A second determination unit that repeatedly acquires a humidity sensor that detects the humidity of inside air, and determines whether or not the previously acquired detected humidity and the currently acquired detected humidity do not match each time the detected humidity of the humidity sensor is acquired. (S190),
A setting unit (S200) for setting a threshold value so as to decrease the threshold value as the humidity of the inside air increases based on the detection value of the humidity sensor;
When the second determination unit determines that the previously obtained detected humidity does not match the currently obtained detected humidity, the setting unit sets a threshold .

  According to the third aspect of the present invention, the threshold value decreases as the humidity of the inside air increases. Therefore, the switching control of the inside / outside air switching door can be adjusted to the sensation of the occupant about the smell.

  In addition, reference numerals in parentheses of each means described in this column and in the claims indicate a correspondence relationship with specific means described in the embodiment described later.

It is a figure showing the schematic structure of the air conditioner for vehicles in a 1st embodiment. FIG. 2 is an electric circuit diagram illustrating an electrical connection relationship of the gas sensor in FIG. 1. 2 is a flowchart illustrating an air conditioning control process of the air conditioning ECU of FIG. 1. 3 is a flowchart showing a part of an inside / outside air switching control process of the air conditioner ECU of FIG. 1. 2 is a flowchart showing the rest of the inside / outside air switching control process of the air conditioner ECU of FIG. 1. 6 is a map for determining a criterion value used in the inside / outside air switching control process of FIG. 5. 6 is a map for determining a criterion value used in the inside / outside air switching control process of FIG. 5. 6 is a timing chart for explaining the inside / outside air switching control process of FIG. 5. It is a flow chart which shows inside-and-outside air change control processing of an air-conditioner ECU of a 2nd embodiment. 10 is a map for determining a determination reference value used in the inside / outside air switching control process of FIG. 9. 10 is a map for determining a determination reference value used in the inside / outside air switching control process of FIG. 9. It is a flowchart which shows the inside and outside air switching control processing of the air-conditioner ECU of 3rd Embodiment. 13 is a map for determining a criterion value used in the inside / outside air switching control process of FIG. 12. 13 is a map for determining a criterion value used in the inside / outside air switching control process of FIG. 12.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are denoted by the same reference numerals in the drawings to simplify the description.

(1st Embodiment)
The vehicle air conditioner includes an indoor air conditioning unit 30. The indoor air-conditioning unit 30 is a vehicle air-conditioning unit disposed on the inside of the instrument panel (instrument panel) at the forefront of the vehicle interior. The indoor air-conditioning unit 30 has a case 31 and forms an air passage through which air is blown toward the vehicle interior.

  An inside / outside air switching box 32 is arranged at the most upstream part of the air passage of the case 31, and the inside / outside air introduction port 33 and the outside air introduction port 34 are switched by an inside / outside air switching door 35. The inside / outside air switching door 35 is driven by a servomotor 36.

  On the downstream side of the inside / outside air switching box 32, an electric blower 37 for blowing air toward the vehicle interior is arranged. This blower 37 drives a centrifugal blower fan 37a by a motor 37b. On the downstream side of the blower 37, an evaporator 38 as a cooling heat exchanger for cooling the blown air is disposed.

  The evaporator 38 is one of the components of the refrigeration cycle device 39, and cools the blown air by absorbing and evaporating the low-temperature and low-pressure refrigerant from the blown air. The refrigeration cycle device 39 is a well-known type, and is configured such that the refrigerant circulates from the discharge side of the compressor 40 to the evaporator 38 via the condenser 41, the liquid receiver 42, and the expansion valve 43 serving as a pressure reducing means. It is configured. Outdoor air (cooling air) is blown to the condenser 41 by an electric cooling fan 41a. The cooling fan 41a is driven by a motor 41b.

  In the refrigeration cycle device 39, the compressor 40 is driven by a traveling engine (not shown) via an electromagnetic clutch 40a. Therefore, the operation of the compressor 40 can be intermittently controlled by the intermittent energization of the electromagnetic clutch 40a.

  On the other hand, in the indoor air-conditioning unit 30, a heater core 44 for heating air flowing in the case 31 is disposed downstream of the evaporator 38. The heater core 44 is a heating heat exchanger that heats air (cold air) that has passed through the evaporator 38 using hot water of the vehicle engine (that is, engine cooling water) as a heat source. A bypass passage 45 is formed on the side of the heater core 44, and the bypass air of the heater core 44 flows through the bypass passage 45.

  An air mix door 46 serving as a temperature adjusting means is rotatably arranged between the evaporator 38 and the heater core 44. The air mix door 46 is driven by a servomotor 47 so that its rotational position (opening degree) can be continuously adjusted.

  The proportion of the amount of air passing through the heater core 44 (the amount of hot air) and the amount of air passing through the bypass passage 45 and bypassing the heater core 44 (the amount of cold air) is adjusted by the opening degree of the air mix door 46, thereby controlling the vehicle. The temperature of the air blown into the room is adjusted.

  A defroster blowout opening 48 for blowing out conditioned air toward the front window glass of the vehicle and a face blowout opening 49 for blowing out conditioned air toward the occupant's face are provided at the most downstream portion of the air passage of the case 31. , And a foot outlet 50 for blowing out the conditioned air toward the feet of the occupant.

  That is, the case 31 is provided with the opening forming portions 48a, 49a, and 50a that form the defroster blowing opening 48, the face blowing opening 49, and the foot outlet 50, respectively.

  A defroster door 51, a face door 52, and a foot door 53, which are mode doors, are rotatably arranged upstream of the blowout openings 48 to 50. These doors 51 to 53 are opened and closed by a common servomotor 54 via a link mechanism (not shown).

  The air conditioner ECU 26 is an electronic control device including a well-known microcomputer including a CPU, a ROM, a RAM, an analog-to-digital conversion circuit, and the like and peripheral circuits thereof. The air conditioner ECU 26 stores a computer program for air conditioning control in its ROM, and performs various calculations and processes based on the computer program.

  Detection signals from well-known air conditioning sensor groups 61 to 65 and various operation signals from an air conditioning operation panel 70 are input to the air conditioner ECU 26.

  The air conditioning sensor group includes, specifically, an outside air sensor 61 for detecting an outside air temperature (outside compartment temperature) Tam, an inside air sensor 62 as a temperature sensor for detecting a temperature TR inside the compartment, and an amount of solar radiation incident into the compartment. A solar radiation sensor 63 for detecting Ts, an evaporator temperature sensor 64 arranged at an air blowing portion of the evaporator 38 to detect an evaporator air temperature Te, and a temperature Tw of hot water (engine cooling water) flowing into the heater core 44. A water temperature sensor 65, a humidity sensor 66 for detecting humidity RH, which is a relative humidity in the cabin, and a concentration of hydrocarbon gas and carbon monoxide (CO) contained in air outside the vehicle (hereinafter referred to as outside air). And a gas sensor 68 that detects the concentration of nitrogen oxide gas (niTRogen oxides) contained in the outside air.

  Here, the hydrocarbon gas and the nitrogen oxide gas are gases that cause odor contained in the outside air. Since carbon monoxide is odorless, it does not cause odor contained in the outside air.

  Nitrogen oxide gas is a generic term for oxides of nitrogen (NOx), and includes nitric oxide (NO), nitrogen dioxide (NO2), nitrous oxide (nitrogen monoxide) (N2O), and nitrous oxide (N2O). N2O3), dinitrogen tetroxide (N2O4), dinitrogen pentoxide (N2O5) and the like.

  The air-conditioning operation panel 70 includes, as various air-conditioning operation members, a temperature setting switch 71 serving as a temperature setting means for setting a vehicle interior temperature, a blowing mode switch 72 for manually setting a blowing mode switched by the blowing mode doors 51 to 53, An inside / outside air switch 73 for manually setting the inside / outside air suction mode by the inside / outside air switching door 35, an air conditioner switch 74 for issuing an operation command signal for the compressor 40 (ie, an ON signal for the electromagnetic clutch 40a), and manually setting the air volume of the blower 37. And an auto switch 76 for issuing a command signal for an automatic air conditioning control state.

  As the blowing mode of the present embodiment, a face mode (FACE), a foot mode (FOOT), a bi-level mode, a foot differential mode (F / D), a defroster mode (DEF), and the like are used.

  The face mode is a mode in which the face blowout opening 49 is opened and the foot blowout opening 50 and the defroster blowout opening 48 are closed. The foot mode is a mode in which the face blowout opening 49 is closed and the foot blowout opening 50 is opened. In this mode, the defroster outlet 48 is slightly opened. The bilevel mode is a mode in which the face blowout opening 49 and the foot blowout opening 50 are respectively opened, and the defroster blowout opening 48 is closed. The foot differential mode is a mode in which the face outlet 49 is closed, the foot outlet 50 is opened, and the defroster outlet 48 is slightly opened. The defroster mode is a mode in which the face blowout opening 49 and the foot blowout opening 50 are respectively closed, and the defroster blowout opening 48 is further opened.

  The electromagnetic clutch 40a of the compressor 40, the servomotors 36, 47, 54 serving as electric drive means of each device, the motor 37b of the blower 37, the motor 41b of the condenser cooling fan 41a, and the like are connected to the output side of the air conditioner ECU 26. The operation of these devices is controlled by the output signal of the air conditioner ECU 26.

  In the present embodiment, semiconductor gas sensors are used as the gas sensors 67 and 68.

  As shown in FIG. 2, the gas sensor 67 is connected in series with the resistance element R1 between the positive electrode of the constant voltage power supply Vd and the ground. The resistance value of the gas sensor 67 decreases as the concentration of hydrocarbon gas or carbon monoxide increases. The constant voltage power supply Vd is a power supply that outputs a constant voltage based on the output voltage of the battery.

  The air conditioner ECU 26 detects the voltage V1 between the positive electrode and the negative electrode of the gas sensor 67, and based on the detected voltage V1, the resistance value of the resistance element R1, and the output voltage of the constant voltage power supply Vd, determines the resistance value of the gas sensor 67. Ask for.

  The gas sensor 68 is connected in series with the resistance element R2 between the positive electrode of the constant voltage power supply Vd and the ground. The resistance value of the gas sensor 68 increases as the concentration of the nitrogen oxide gas increases.

  The air conditioner ECU 26 detects a voltage V2 between the positive electrode and the negative electrode of the gas sensor 68, and determines the resistance value of the gas sensor 68 based on the detected voltage V2, the resistance value of the resistance element R2, and the output voltage of the constant voltage power supply Vd. Ask for.

  Based on the resistance values of the gas sensors 67 and 68 thus obtained, the concentration of the hydrocarbon gas and the concentration of the nitrogen oxide gas contained in the outside air can be obtained.

  Next, an air conditioning control process of the air conditioner ECU 26 of the present embodiment will be described with reference to FIG. FIG. 3 is a flowchart showing basic air conditioning control processing by the air conditioner ECU 26. 4 and 5 are flowcharts showing the inside / outside air switching control processing by the air conditioner ECU 26. The air conditioner ECU 26 executes the air conditioning control process and the inside / outside air switching control process in parallel.

  Hereinafter, the air conditioning control process and the inside / outside air switching control process will be described separately.

(Air conditioning control processing)
First, when the ignition switch is turned on (ON) and DC power is supplied from the battery to the air conditioner ECU 26, the routine of FIG. 3 is started, and each initialization is performed (step 1). The ignition switch is a power switch that supplies electric power to a driving engine and the like.

  Subsequently, switch signals are read from each switch such as the temperature setting switch 71 (step 2).

  Subsequently, signals obtained by A / D conversion of sensor signals are read from the inside air sensor 62, the outside air sensor 61, the solar radiation sensor 63, the evaporator temperature sensor 64, and the water temperature sensor 65 (step 3).

  Subsequently, a target blowing temperature TAO of the air blown into the vehicle compartment is calculated based on the following equation 1 stored in the ROM in advance (step 4).

TAO = Kset × Tset−KR × TR
−KAM × TAM−KS × TS + C (Equation 1)
The target outlet temperature TAO is an air temperature that needs to be blown out from the outlets 48 to 50 in order to maintain the vehicle interior temperature at the set temperature Tset.

  Tset is the set temperature set by the temperature setting switch 71, TR is the inside air temperature detected by the inside air sensor 62, TAM is the outside air temperature detected by the outside air sensor 61, and TS is the amount of solar radiation detected by the solar radiation sensor 63. It is. Kset, KR, KAM, and KS are gains, and C is a correction constant.

  Subsequently, warm-up control (blower delay control) for determining a blower voltage corresponding to the cooling water temperature (TW) detected by the water temperature sensor 65 from the characteristic diagram stored in the memory in advance is performed. This warm-up control is executed in winter when the outside air temperature is low, or when the outlet mode is the B / L mode or the FOOT mode. The blower voltage is a voltage applied to the motor 37b for the blower fan 37a.

  Then, when the cooling water temperature (TW) rises to, for example, 60 ° C. or higher, a blower voltage corresponding to the target blowing temperature (TAO) is applied from the characteristic diagram stored in the memory in advance (that is, the blower voltage is applied to the motor 37b for the blower fan 37a). Voltage) is determined (step 5).

  The blower voltage determined in this way and the amount of air blown from the blower 37 (hereinafter, blower level) have a relationship specified on a one-to-one basis.

  Subsequently, the outlet mode is determined based on the target outlet temperature TAO and the output signal of the outlet mode switch 72 (step 6).

  If the user has not manually set the blow mode switch 72, one of the face mode, the bi-level mode, and the foot mode is determined based on the target blow temperature TAO from the characteristic diagram stored in advance in the memory. The mode is determined as the outlet mode to be implemented.

  On the other hand, when the user manually sets the outlet mode on the outlet mode switch 72, one of the manually set modes is determined as the outlet mode to be performed.

  As described above, the air outlet mode to be executed is determined based on the manual setting of the air outlet mode switch 72 and the target air outlet temperature TAO.

  Subsequently, a target door opening (SW) of the air mix door 46 is calculated based on the following equation 2 stored in the ROM in advance (step 7).

SW = {(TAO-TE) / (TW-TE)} × 100 (%) (Equation 2)
TE is the post-evaporation temperature detected by the evaporator temperature sensor 64 and the cooling water temperature detected by the water temperature sensor 65.

  Then, when it is calculated that SW ≦ 0 (%), the air mix door 46 is controlled to a position (MAXCOOL position) where all the cool air from the evaporator 38 is bypassed from the heater core 44. In addition, when it is calculated as SW ≧ 100 (%), the air mix door 46 is controlled to a position (MAXHOT position) where all of the cool air from the evaporator 38 passes through the heater core 44.

  Further, when it is calculated as 0 (%) <SW <100 (%), the air mix door 46 passes a part of the cool air from the evaporator 38 to the heater core 44 and diverts the remaining cool air from the heater core 44. Is controlled.

  Subsequently, when the air conditioner switch 74 is ON, the operation state of the compressor 40 is determined. That is, start and stop of the compressor 40 are determined based on the post-evaporation temperature (TE) detected by the evaporator temperature sensor 64 (step 8).

  Specifically, when the post-evaporation temperature (TE) detected by the evaporator temperature sensor 64 is equal to or higher than the first frosting temperature (for example, 4 ° C.), the electromagnetic clutch 40 a is activated so that the compressor 40 starts (ON). The energization control (ON) is performed to operate the refrigeration cycle device 39. That is, the air cooling function of the evaporator 38 is operated.

  When the post-evaporation temperature (TE) detected by the evaporator temperature sensor 64 is equal to or lower than a second frosting temperature (for example, 3 ° C.) lower than the first frosting temperature, the operation of the compressor 40 is stopped (OFF). ), The operation of the refrigeration cycle device 39 is stopped by controlling the power supply to the electromagnetic clutch 40a (OFF). That is, the air cooling operation of the evaporator 38 is stopped.

  Subsequently, control signals are sent to the actuators 14, 22, 53, the motor 37b for the blower fan 37a, and the electromagnetic clutch 40a so that the control states calculated or determined in steps 5, 6, 7, 9 are obtained. Is output (step 9A).

  Then, in step 10, it is determined whether or not the time that has elapsed since the start of the reading process in step 2 (hereinafter referred to as elapsed time) has exceeded the control cycle time t (for example, 0.5 to 2.5 seconds). judge.

  If the elapsed time is shorter than the control cycle time t, the determination in step 10 is NO, and the process returns to step 9B. Therefore, as long as the elapsed time is less than the control cycle time t, the NO determination of step 9B is repeated. Thereafter, when the elapsed time becomes equal to or longer than the control cycle time t, YES is determined in step 10 and the process returns to step 2. Thereafter, the processing of steps 2, 3, 4,..., 7, 8, and 9 is repeated.

(Inside / outside air switching control processing)
First, in step 100, the vehicle interior temperature TR which is an output signal of the inside air sensor 62 is obtained. Next, in step 110, the vehicle interior humidity RH, which is the output signal of the humidity sensor 66, is obtained.

  Next, in step 120, the voltage V1 between the positive electrode and the negative electrode of the gas sensor 67 is read, and based on the read voltage V1, the resistance value of the resistance element R1, and the output voltage of the constant voltage power supply Vd, the gas sensor 67 is read. Is obtained.

  Next, in step 121, the voltage V2 between the positive electrode and the negative electrode of the gas sensor 68 is read, and based on the read voltage V2, the resistance value of the resistor R2, and the output voltage of the constant voltage power supply Vd, the gas sensor 68 is read. Is obtained.

  In the next step 130, the vehicle interior temperature TR_old, the vehicle interior humidity RH_old, the criterion value Ls1, and the criterion value Ls2 used for controlling the inside / outside air switching door 35 are initialized.

  Specifically, the vehicle interior temperature TR determined in step 100 is set as the vehicle interior temperature TR_old, and the vehicle interior humidity RH determined in step 110 is set as the vehicle interior humidity RH_old.

  Further, an initial value is set for each of the determination reference values Ls1 and Ls2. The determination reference value Ls1 is a reference value used for comparing a change rate of a hydrocarbon gas described later. The determination reference value Ls2 is a reference value used to compare the rate of change of the nitrogen oxide gas.

  Next, in step 140, a gas concentration reference value Rair1 is set as a reference for calculating the gas concentration change rate Ln1.

  In the present embodiment, the largest value among the resistance values Rgas1a of the gas sensor 67 calculated after the ignition switch is turned on is set as the gas concentration reference value Rair1. That is, the resistance value Rgas1a of the gas sensor 67 calculated when the gas concentration is the lowest after the ignition switch is turned on is set as the gas concentration reference value Rair1.

  For example, in the current step 140 executed for the first time after the ignition switch is turned on, the resistance value Rgas1a obtained in the step 120 is set as the gas concentration reference value Rair1.

  Next, in step 141, a gas concentration reference value Rair2 is set as a reference for calculating the gas concentration change rate Ln2.

  In the present embodiment, the smallest one of the resistance values Rgas2a of the gas sensor 68 calculated after the ignition switch is turned on is set as the gas concentration reference value Rair2. That is, the resistance value Rgas2a of the gas sensor 68 calculated when the gas concentration is the lowest after the ignition switch is turned on is set as the gas concentration reference value Rair2.

  For example, in the current step 141 executed the first time after the ignition switch is turned on, the resistance value Rgas2a obtained in the above step 121 is set as the gas concentration reference value Rair2.

  Next, in step 150, similarly to step 120, the voltage V1 between the positive electrode and the negative electrode of the gas sensor 67 is read, and the read voltage V1, the resistance value of the resistance element R1, and the constant voltage power supply Vd are read. A resistance value Rgas1 of the gas sensor 67 is obtained based on the output voltage.

  Next, in step 151, as in step 121, the voltage V2 between the positive electrode and the negative electrode of the gas sensor 68 is read, and the read voltage V2, the resistance value of the resistance element R2, and the constant voltage power supply Vd. The resistance value Rgas2 of the gas sensor 68 is obtained based on the output voltage.

  Next, in step 160, the gas concentration change rate Ln1 is calculated. The gas concentration change rate Ln1 indicates a rate of change from (ie, the gas concentration reference value Rair1 obtained in step 140) (ie, the resistance value Rgas1 obtained in step 150).

  Specifically, the gas concentration change rate Ln1 is obtained as shown in the following Expression 3.

Ln1 = Rgas1 / Rair1 ... Equation 3
The gas concentration change rate Ln1 of the present embodiment decreases as the concentration of hydrocarbon gas or carbon monoxide (CO) increases.

  Next, in step 161, the gas concentration change rate Ln2 is calculated. The gas concentration change rate Ln2 indicates a rate of change from (that is, the gas concentration reference value Rair2 obtained in step 141) (that is, the resistance value Rgas2 obtained in step 151).

  Specifically, the gas concentration change rate Ln2 is obtained as shown in the following Expression 4.

Ln2 = Rgas2 / Rair2 ... Equation 4
The gas concentration change rate Ln2 of the present embodiment increases as the gas concentration of the nitrogen oxide gas increases.

  Next, in step 170, it is determined whether or not the vehicle interior temperature has changed. Specifically, a vehicle interior temperature TR, which is an output signal of the inside air sensor 62, is obtained, and it is determined whether or not the vehicle interior temperature TR matches the previously obtained vehicle interior temperature TR_old.

  For example, when the vehicle interior temperature TR matches the previous vehicle interior temperature TR_old, it is determined that the vehicle interior temperature has not changed, and NO is determined in step 170. In this case, the process proceeds to step 190 in FIG.

  On the other hand, when the vehicle interior temperature TR does not match the previous vehicle interior temperature TR_old, it is determined that the vehicle interior temperature has changed, and YES is determined in step 170. In this case, it is decided to change the judgment reference values Ls1 and Ls2 (step 171). In addition, the vehicle interior temperature TR obtained in step 170 is set to the vehicle interior temperature TR_old (step 180).

  Next, in step 190 of FIG. 5, it is determined whether the vehicle interior humidity has changed. Specifically, the vehicle interior humidity RH, which is an output signal of the humidity sensor 66, is acquired, and it is determined whether or not the interior humidity RH matches the previously acquired interior humidity RH_old.

  For example, when the vehicle interior humidity RH matches the previous vehicle interior humidity RH_old, it is determined that the vehicle interior humidity has not changed and NO is determined in step 190. In this case, the process proceeds to step 220.

  On the other hand, when the vehicle interior humidity RH does not match the previous vehicle interior humidity RH_old, it is determined that the vehicle interior humidity has changed, and YES is determined in step 190. In this case, it is decided to change the judgment reference values Ls1 and Ls2 (step 200). In addition, the vehicle interior temperature TR acquired in step 190 is set to the vehicle interior humidity RH_old (step 210).

  As described above, when one of the vehicle interior temperature and the vehicle interior humidity changes, one of steps 170 and 190 is determined to be YES. In this case, the determination reference values Ls1 and Ls2 are determined using the maps of FIGS. 6 and 7 as follows.

  The determination reference value Ls1 is a reference value used to determine the gas concentration of hydrocarbon gas or carbon monoxide (CO) when controlling the inside / outside air switching door 35.

  The determination reference value Ls2 is a reference value used for determining the gas concentration of the nitrogen oxide gas when controlling the inside / outside air switching door 35.

  FIG. 6 shows a map showing the relationship between the vehicle interior temperature, the vehicle interior humidity, and the determination reference value Ls1. The criterion value Ls1 is composed of three values of “large”, “medium”, and “low”.

  In FIG. 6, as the vehicle interior temperature increases, the determination reference value Ls1 increases in the order of “low” → “medium” → “large”. As the vehicle interior humidity increases, the criterion value Ls1 increases in the order of “low” → “medium” → “large”.

  Therefore, in the present embodiment, the vehicle interior temperature TR_old is the vehicle interior temperature in FIG. 6, the vehicle interior humidity RH_old is the vehicle interior humidity in FIG. 6, and the vehicle interior temperature TR_old and the vehicle interior humidity RH_old are obtained from the map of FIG. Is selected.

  FIG. 7 shows a map showing the relationship between the vehicle interior temperature, the vehicle interior humidity, and the determination reference value Ls2. The criterion value Ls2 is composed of three values of “large”, “medium”, and “low”.

  In FIG. 7, as the vehicle interior temperature increases, the determination reference value Ls2 decreases in the order of “large” → “medium” → “low”. As the vehicle interior humidity increases, the determination reference value Ls2 decreases in the order of “large” → “medium” → “low”.

  Therefore, in the present embodiment, the vehicle interior temperature TR_old is the vehicle interior temperature in FIG. 7, the vehicle interior humidity RH_old is the vehicle interior humidity in FIG. 7, and the vehicle interior temperature TR_old and the vehicle interior humidity RH_old are obtained from the map of FIG. Is selected.

  When one of the vehicle interior temperature and the vehicle interior humidity changes as described above, the determination reference values Ls1 and Ls2 are determined, and the determined determination reference values Ls1 and Ls2 are determined to be used in step 220 of this time.

  On the other hand, when the vehicle interior temperature does not change and the vehicle interior humidity does not change, NO is determined in steps 170 and 190, respectively. In this case, it is determined not to change the determination reference values Ls1 and Ls2. That is, it is determined that the determination reference values Ls1 and Ls2 used in the previous step 220 are used in the current step 220.

  Next, using the thus determined determination reference values Ls1 and Ls2, it is determined which of the inside air introduction mode and the outside air introduction mode should be executed (Step 220).

  (1) By determining whether or not the gas concentration change rate Ln1 is equal to or less than a determination reference value Ls1, it is determined whether or not the concentration of the hydrocarbon gas contained in the outside air is equal to or greater than a first threshold.

  (2) By determining whether or not the gas concentration change rate Ln2 is equal to or greater than the determination reference value Ls2, it is determined whether or not the concentration of the nitrogen oxide gas contained in the outside air is equal to or greater than a second threshold.

  For example, (a) when the gas concentration change rate Ln1 is equal to or smaller than the judgment reference value Ls1 and the gas concentration change rate Ln2 is equal to or larger than the judgment reference value Ls2, the hydrocarbon gas concentration is equal to or larger than the first threshold value, and It is determined that the concentration of the oxide gas is equal to or higher than the second threshold. In this case, it is determined that the inside air introduction mode should be performed.

  (B) When the gas concentration change rate Ln1 is equal to or less than the judgment reference value Ls1 and the gas concentration change rate Ln2 is less than the judgment reference value Ls2, the concentration of the hydrocarbon gas is equal to or higher than the first threshold and It is determined that the gas concentration is less than the second threshold. In this case, it is determined that the inside air introduction mode should be performed.

  (C) When the gas concentration change rate Ln1 is greater than the determination reference value Ls1 and the gas concentration change rate Ln2 is equal to or greater than the determination reference value Ls2, the hydrocarbon gas concentration is less than the first threshold and the nitrogen oxides It is determined that the gas concentration is equal to or higher than the second threshold. In this case, it is determined that the inside air introduction mode should be performed.

  (D) When the gas concentration change rate Ln1 is greater than the determination reference value Ls1 and the gas concentration change rate Ln2 is less than the determination reference value Ls2, the hydrocarbon gas concentration is less than the first threshold and the nitrogen oxide It is determined that the gas concentration is less than the second threshold. In this case, it is determined that the outside air introduction mode should be performed.

Thus, it is determined that the inside air introduction mode or the outside air introduction mode should be performed using the gas concentration change rates Ln1 and Ln2 and the determination reference values Ls1 and Ls2.

  The outside air switching door 35 is controlled via the servomotor 36 to execute the inside air introduction mode or the outside air introduction mode determined in this way (step 230). Thereafter, the process returns to step 140.

  Thereafter, in step 140, a gas concentration reference value Rair1 is set. In step 140 this time, the largest value of the resistance value Rgas1a of the gas sensor 67 obtained in step 120 and the resistance value Rgas1a of the gas sensor 67 obtained in step 150 is set as the gas concentration reference value Rair1.

  Next, in step 141, a gas concentration reference value Rair2 is set. In step 141 this time, the smallest one of the resistance value Rgas2a of the gas sensor 67 obtained in step 121 and the resistance value Rgas2a of the gas sensor 68 obtained in step 151 is set as the gas concentration reference value Rair2.

  After that, the processing proceeds to step 170 through the processing of steps 150, 151, 160, and 161.

  In step 170, the vehicle interior temperature TR, which is the output signal of the inside air sensor 62, is acquired, and it is determined whether the vehicle interior temperature has changed based on the vehicle interior temperature TR and the vehicle interior temperature TR_old.

  Further, in step 190, the vehicle interior humidity RH which is an output signal of the humidity sensor 66 is obtained, and it is determined whether or not the vehicle interior humidity has changed based on the vehicle interior humidity RH and the vehicle interior humidity RH_old.

  When either one of the vehicle interior temperature and the vehicle interior humidity changes, YES is determined for one of steps 170 and 190. In this case, the judgment reference values Ls1 and Ls2 are changed. Using the changed determination reference values Ls1 and Ls2, it is determined which of the inside air introduction mode and the outside air introduction mode should be executed (Step 220). The outside air switching door 35 is controlled via the servomotor 36 to execute the determined inside air introduction mode or outside air introduction mode (step 230).

  On the other hand, when neither the vehicle interior temperature nor the vehicle interior humidity changes, NO is determined in each of steps 170 and 190.

  In this case, it is determined that the determination reference values Ls1 and Ls2 used in the previous step 220 are used in the current step 220. It is determined which of the inside air introduction mode and the outside air introduction mode should be executed based on the determination reference values Ls1 and Ls2 which have been determined to be used (step 220). The outside air switching door 35 is controlled via the servomotor 36 to execute the determined inside air introduction mode or outside air introduction mode (step 230).

  Thereafter, the processing of steps 140, 141, 150, 151, 160, 161, 170, 171, 180, 190, 200, 210, 220, and 230 is repeated.

  Here, in the Nth step 140, the largest value among the resistance values Rgas1a of the gas sensor 67 calculated after the ignition switch is turned on is set as the gas concentration reference value Rair1. N indicates the number of executions of the step.

  In the N-th step 141, the smallest one of the resistance values Rgas2a of the gas sensor 68 calculated after the ignition switch is turned on is set as the gas concentration reference value Rair2.

  In an N-th step 150, the resistance value Rgas1 of the gas sensor 67 is determined. In an N-th step 151, a resistance value Rgas2 of the gas sensor 68 is obtained.

  In the N-th step 160, the gas concentration change rate Ln1 is calculated based on the gas concentration reference value Rair1 and the resistance value Rgas1a. In an N-th step 161, a gas concentration change rate Ln 2 is calculated based on the gas concentration reference value Rair 2 and the resistance value Rgas 2.

  Here, when one of the vehicle interior temperature and the vehicle interior humidity changes, YES is determined for one of steps 170 and 190, and the determination reference values Ls1 and Ls2 are changed. Using the changed determination reference values Ls1 and Ls2, it is determined which of the inside air introduction mode and the outside air introduction mode should be executed (Step 220). The outside air switching door 35 is controlled via the servomotor 36 to execute the determined inside air introduction mode or outside air introduction mode (step 230).

  On the other hand, when the vehicle interior temperature does not change and the vehicle interior humidity does not change, NO is determined in steps 170 and 190, respectively. In this case, it is determined not to change the determination reference values Ls1 and Ls2. That is, it is determined that the determination reference values Ls1 and Ls2 used in the previous step 220 are used in the current step 220. It is determined which of the inside air introduction mode and the outside air introduction mode should be executed based on the determination reference values Ls1 and Ls2 which have been determined to be used (step 220). The outside air switching door 35 is controlled via the servomotor 36 to execute the determined inside air introduction mode or outside air introduction mode (step 230).

  According to the present embodiment described above, the indoor air-conditioning unit 30 includes the outside air introduction port 34 for introducing outside air into the vehicle interior, the inside air introduction port 33 for introducing inside air into the vehicle interior, the outside air introduction port 34, and the inside air introduction port. 33 and an inside / outside air switching door 35 for opening one of the doors and closing the other. The indoor air-conditioning unit 30 includes a gas sensor 67 for detecting the concentration of a hydrocarbon gas that causes an unpleasant odor contained in the outside air, and a gas sensor for detecting the concentration of a nitrogen oxide gas that causes the unusual odor contained in the outside air 68.

  The air conditioner ECU 26 determines whether the concentration of the hydrocarbon gas is higher than the first threshold based on the detection value of the gas sensor 67. The air conditioner ECU 26 determines whether the concentration of the nitrogen oxide gas is higher than the second threshold based on the detection value of the gas sensor 68.

  The air conditioner ECU 26 uses the inside / outside air switching door 35 to introduce outside air when the concentration of the hydrocarbon gas is equal to or higher than the first threshold value or when the concentration of the nitrogen oxide gas is equal to or higher than the second threshold value. The mouth 34 is closed and the inside air inlet 33 is opened.

  When the concentration of the hydrocarbon gas is less than the first threshold value and the concentration of the nitrogen oxide gas is less than the second threshold value, the air conditioner ECU 26 opens the outside air introduction port 34 by the inside / outside air switching door 35 to open the inside air introduction port 33. The inside / outside air switching door 35 is controlled via the servo motor 36 so as to close the door. The indoor air-conditioning unit 30 includes an inside air sensor 62 for detecting the temperature of the inside air and a humidity sensor 66 for detecting the humidity of the inside air.

  Here, when the interior of the vehicle is hot and humid, an environment is created in the vehicle interior that makes it easier for the occupants to smell. The following are four causes.

  A: When the temperature in the cabin is high, the amount of the odorous substances volatilizing increases, and the odor becomes extremely strong.

  B: If the humidity in the cabin is high, the odor of the nose, which feels odor, becomes high, and the sensitivity to odor increases.

  C: When the temperature in the cabin increases, the convection of air in the cabin increases, and the situation where the olfactory mucous membrane of the nose is exposed to odorous components increases.

  D: Increasing the temperature and humidity in the cabin increases the incidence of decay, which is a source of unpleasant odor, and the incidence of mold.

  Therefore, in the present embodiment, the first threshold value and the second threshold value are set such that the first threshold value and the second threshold value are respectively reduced as the temperature in the vehicle interior increases based on the detection value of the inside air sensor 62. The first threshold value and the second threshold value are set such that the first threshold value and the second threshold value decrease as the humidity in the vehicle interior increases based on the detection value of the humidity sensor 66 (see FIG. 8). Therefore, the switching control of the inside / outside air switching door 35 can be adjusted to the sensation of the occupant for the smell.

  Accordingly, the inside air fixing times T2, T3, and T4 (see FIG. 8E) can be set to times corresponding to the odor sensitivity of the occupant. The inside air fixing times T2, T3, and T4 are periods in which the inside air introduction port 33 is opened by the inside / outside air switching door 35 and the outside air introduction port 34 is closed. Further, the occupant does not need to perform an operation for adjusting the first threshold value and the second threshold value, which makes driving the vehicle safe.

(2nd Embodiment)
In the first embodiment, an example in which the determination reference values Ls1 and Ls2 are set based on the vehicle interior temperature TR and the vehicle interior humidity RH has been described. However, the determination reference values Ls1 and Ls2 are set based on the vehicle interior temperature TR. The second embodiment will be described.

  The present embodiment is different from the first embodiment only in the inside / outside air switching control process of the air conditioner ECU 26, and other configurations are common. Therefore, the inside / outside air switching control process of the air conditioner ECU 26 will be described below with reference to FIG. 9, the same reference numerals as those in FIGS. 4 and 5 denote the same steps, and a description thereof will be omitted.

  The air conditioner ECU 26 executes the inside / outside air switching control process of FIG. 9 instead of FIG. 4 and FIG.

  FIG. 9 includes Step 130A in which Steps 110, 190, 200, and 210 are deleted from FIGS. Step 130A is processing for initializing the vehicle interior temperature TR_old, the determination reference value Ls1, and the determination reference value Ls2 used for controlling the inside / outside air switching door 35, respectively.

  For this reason, the air conditioner ECU 26 of the present embodiment determines the determination reference values Ls1 and Ls2 based on the vehicle interior temperature regardless of the vehicle interior humidity.

  FIG. 10 shows a map indicating the relationship between the vehicle interior temperature and the determination reference value Ls1. In FIG. 10, the criterion value Ls1 increases as the vehicle interior temperature increases. That is, the first threshold value corresponding to the determination reference value Ls1 decreases as the vehicle interior temperature increases.

  Therefore, in the present embodiment, the vehicle interior temperature TR_old is set as the vehicle interior temperature in FIG. 10, and the determination reference value Ls1 corresponding to the vehicle interior temperature TR_old is selected from the map of FIG.

  FIG. 11 shows a map indicating the relationship between the vehicle interior temperature and the determination reference value Ls2. In FIG. 11, the criterion value Ls2 decreases as the vehicle interior temperature increases. That is, the second threshold value corresponding to the determination reference value Ls2 decreases as the vehicle interior temperature increases.

  Therefore, in the present embodiment, the vehicle interior temperature TR_old is set to the vehicle interior temperature in FIG. 11, and the determination reference value Ls2 corresponding to the vehicle interior temperature TR_old is selected from the map of FIG.

  Thus, the judgment reference values Ls1 and Ls2 are selected. The selected Ls1 is compared with the gas concentration change rate Ln1. The judgment reference value Ls2 is compared with the gas concentration change rate Ln2. Using such a comparison result, it is determined that the inside air introduction mode or the outside air introduction mode should be performed, as in the first embodiment. The outside air switching door 35 is controlled via the servomotor 36 so as to execute the inside air introduction mode or the outside air introduction mode determined as described above.

  According to the present embodiment described above, the air conditioner ECU 26 determines whether the concentration of the hydrocarbon gas is equal to or higher than the first threshold or the concentration of the nitrogen oxide gas is equal to or higher than the second threshold. At this time, the outside air inlet 34 is closed by the inside / outside air switching door 35 and the inside air inlet 33 is opened. When the concentration of the hydrocarbon gas is less than the first threshold value and the concentration of the nitrogen oxide gas is less than the second threshold value, the air conditioner ECU 26 opens the outside air introduction port 34 by the inside / outside air switching door 35 to open the inside air introduction port 33. The inside / outside air switching door 35 is controlled via the servo motor 36 so as to close the door.

  Therefore, in the present embodiment, the first threshold value and the second threshold value are set such that the first threshold value and the second threshold value are respectively reduced as the temperature in the vehicle interior increases based on the detection value of the inside air sensor 62. Therefore, the switching control of the inside / outside air switching door 35 can be adjusted to the sensation of the occupant about the smell.

(Third embodiment)
In the above-described first embodiment, an example has been described in which the determination reference values Ls1 and Ls2 are set based on the vehicle interior temperature TR and the vehicle interior humidity RH. However, the determination reference values Ls1 and Ls2 are set based on the vehicle interior humidity RH. The third embodiment will be described.

  The present embodiment is different from the first embodiment only in the inside / outside air switching control process of the air conditioner ECU 26, and other configurations are common. Therefore, the inside / outside air switching control process of the air conditioner ECU 26 will be described below with reference to FIG. 12, the same reference numerals as those in FIGS. 4 and 5 denote the same steps, and a description thereof will be omitted.

  The air conditioner ECU 26 executes the inside / outside air switching control process of FIG. 12 instead of FIGS.

FIG. 12 includes a step 130B in which steps 100, 170, 171, and 180 are deleted from FIGS. Step 130B is processing for initializing the vehicle interior humidity RH_old, the criterion value Ls1, and the criterion value Ls2 used for controlling the inside / outside air switching door 35, respectively. For this reason, the air conditioner ECU 26 of the present embodiment
The determination reference values Ls1 and Ls2 are determined based on the vehicle interior humidity regardless of the vehicle interior temperature.

  FIG. 13 shows a map indicating the relationship between the vehicle interior humidity and the determination reference value Ls1. In the map of FIG. 13, the criterion value Ls1 increases as the vehicle interior humidity increases. That is, as the vehicle interior humidity increases, the first threshold value corresponding to the determination reference value Ls1 decreases.

  Therefore, in the present embodiment, the vehicle interior humidity RH_old is set as the vehicle interior humidity in FIG. 13, and the determination reference value Ls1 corresponding to the vehicle interior humidity RH_old is selected from the map in FIG.

  FIG. 14 shows a map indicating the relationship between the vehicle interior temperature and the determination reference value Ls2. In the map of FIG. 14, the criterion value Ls2 increases as the vehicle interior temperature increases. That is, as the vehicle interior humidity increases, the second threshold value corresponding to the determination reference value Ls2 decreases.

  Therefore, in the present embodiment, the vehicle interior humidity RH_old is set to the vehicle interior humidity in FIG. 11, and the determination reference value Ls2 corresponding to the vehicle interior humidity RH_old is selected from the map in FIG.

  Thus, the judgment reference values Ls1 and Ls2 are selected. The selected Ls1 is compared with the gas concentration change rate Ln1. The judgment reference value Ls2 is compared with the gas concentration change rate Ln2. Using such a comparison result, it is determined that the inside air introduction mode or the outside air introduction mode should be performed, as in the first embodiment. The outside air switching door 35 is controlled via the servomotor 36 so as to execute the inside air introduction mode or the outside air introduction mode determined as described above.

  According to the present embodiment described above, the air conditioner ECU 26 determines whether the concentration of the hydrocarbon gas is equal to or higher than the first threshold or the concentration of the nitrogen oxide gas is equal to or higher than the second threshold. At this time, the outside air inlet 34 is closed by the inside / outside air switching door 35 and the inside air inlet 33 is opened. When the concentration of the hydrocarbon gas is less than the first threshold value and the concentration of the nitrogen oxide gas is less than the second threshold value, the air conditioner ECU 26 opens the outside air introduction port 34 by the inside / outside air switching door 35 to open the inside air introduction port 33. The inside / outside air switching door 35 is controlled via the servo motor 36 so as to close the door.

  In the present embodiment, the first threshold value and the second threshold value are set such that the first threshold value and the second threshold value decrease as the humidity in the vehicle interior increases based on the detection value of the humidity sensor 66. Therefore, the switching control of the inside / outside air switching door 35 can be adjusted to the sensation of the occupant about the smell.

(Other embodiments)
(1) In the first, second, and third embodiments, examples in which a hydrocarbon gas or a nitrogen oxide gas is used as a gas that causes odor in the outside air have been described. A gas other than the hydrogen gas or the nitrogen oxide gas may be a gas that causes odor in the outside air.

  (2) In the first, second, and third embodiments, examples in which semiconductor sensors are used as the gas sensors 67 and 68 have been described. However, the present invention is not limited to this, and sensors other than semiconductor sensors are used as the gas sensors 67 and 68. You may.

  (3) The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope described in the claims. In addition, the above embodiments are not irrelevant to each other, and can be appropriately combined unless a combination is clearly impossible. In each of the above embodiments, it is needless to say that the elements constituting the embodiment are not necessarily essential, unless otherwise clearly indicated as essential or in principle considered to be clearly essential. No. In each of the above embodiments, when a numerical value such as the number, numerical value, amount, range, or the like of the constituent elements of the exemplary embodiment is referred to, it is particularly limited to a specific number when it is clearly stated that it is essential and in principle. The number is not limited to the specific number unless otherwise specified. Further, in each of the above embodiments, when referring to the shape of components and the like, the positional relationship, and the like, the shape, It is not limited to a positional relationship or the like.

26 Air Conditioner ECU
Reference Signs List 30 indoor air conditioning unit 32 inside / outside air switching box 33 inside air introduction port 34 outside air introduction port 35 inside / outside air switching door 67 gas sensor 68 gas sensor

Claims (6)

A door (35) for opening one of the outside air inlet (34) for introducing outside air and the inside air inlet (33) for introducing inside air and closing the other, and one of the outside air inlet and the inside air inlet. A casing (31) for circulating the introduced air into the vehicle interior, and a control device for controlling the vehicle air conditioning unit (30),
A first determination unit (S220) that determines whether the concentration of the gas is equal to or greater than a threshold based on a detection value of a gas sensor (67, 68) that detects a concentration of a gas that causes odor in the outside air; ,
When the first determination unit determines that the concentration of the gas is equal to or more than a threshold, the door is controlled to close the outside air introduction port and open the inside air introduction port by the door, and the concentration of the gas is equal to the threshold value. A control unit (S230) that controls the door so that the door opens the outside air introduction port and closes the inside air introduction port when the first determination unit determines that the number is less than
The temperature detected by the temperature sensor that detects the temperature of the inside air is repeatedly acquired, and each time the temperature detected by the temperature sensor is acquired, it is determined whether the previously acquired temperature and the currently acquired temperature are inconsistent. A second determination unit (S170) to perform
A first setting unit (S171) configured to set the threshold value so as to decrease the threshold value as the temperature of the inside air increases based on the detection value of the temperature sensor;
The detection humidity of the humidity sensor that detects the humidity of the inside air is repeatedly acquired, and each time the detection humidity of the humidity sensor is acquired, it is determined whether or not the previously acquired detection humidity and the currently acquired detection humidity do not match. A third determining unit (S190) to perform
A second setting unit (S200) that sets the threshold so as to lower the threshold as the humidity of the inside air increases based on the detection value of the humidity sensor;
When the second determination unit determines that the previously acquired detection temperature and the currently acquired detection temperature do not match, the first setting unit sets the threshold value,
The control device, wherein the second setting unit sets the threshold when the third determination unit determines that the detected humidity acquired last time and the detected humidity acquired this time do not match. The gas sensor is
  A first sensor (67) for detecting the concentration of the hydrocarbon gas as the concentration of the gas;
  A second sensor (68) for detecting the concentration of the nitrogen oxide gas as the concentration of the gas.
  A threshold used for determining the concentration of the hydrocarbon gas in the first determination unit is a first threshold,
  In the case where the threshold used for the determination of the concentration of the nitrogen oxide gas in the first determination unit is a second threshold,
  The control unit determines that the first determination unit determines that the concentration of the hydrocarbon gas is equal to or higher than the first threshold, and that the control unit determines that the concentration of the nitrogen oxide gas is equal to or higher than the second threshold. In either case when the determination unit determines, the door is controlled to close the outside air introduction port and open the inside air introduction port by the door,
  The controller determines that the first determination unit determines that the concentration of the hydrocarbon gas is less than the first threshold, and determines that the concentration of the nitrogen oxide gas is less than the second threshold. When the determination unit determines, controlling the door to open the outside air introduction port by the door and close the inside air introduction port,
The first setting unit sets the first threshold so as to lower the first threshold as the temperature of the inside air increases based on the detection value of the temperature sensor, and the first threshold based on the detection value of the temperature sensor. As the temperature of the inside air increases, the second threshold is set so as to lower the second threshold,
The second setting unit sets the first threshold so as to lower the first threshold as the humidity of the inside air increases based on the detection value of the humidity sensor, and the second threshold based on the detection value of the humidity sensor. As the humidity of the inside air increases, the second threshold is set so as to lower the second threshold,
When the second determination unit determines that the previously acquired detection temperature and the currently acquired detection temperature do not match, the first setting unit sets the first threshold and the second threshold,
  2. The second setting unit sets the first threshold and the second threshold when the third determination unit determines that the detected humidity acquired last time and the detected humidity acquired this time do not match with each other. The control device according to claim 1. A door (35) for opening one of the outside air inlet (34) for introducing outside air and the inside air inlet (33) for introducing inside air and closing the other, and one of the outside air inlet and the inside air inlet. A casing (31) for circulating the introduced air into the vehicle interior, and a control device for controlling the vehicle air conditioning unit (30),
A first determination unit (S220) that determines whether the concentration of the gas is equal to or greater than a threshold based on a detection value of a gas sensor (67, 68) that detects a concentration of a gas that causes odor in the outside air; ,
When the first determination unit determines that the concentration of the gas is equal to or more than a threshold , the door is controlled to close the outside air introduction port and open the inside air introduction port by the door, and the concentration of the gas is equal to the threshold value. A control unit (S230) that controls the door so that the door opens the outside air introduction port and closes the inside air introduction port when the first determination unit determines that the number is less than
The temperature detected by the temperature sensor that detects the temperature of the inside air is repeatedly acquired, and each time the temperature detected by the temperature sensor is acquired, it is determined whether the previously acquired temperature and the currently acquired temperature are inconsistent. A second determination unit (S170) to perform
A setting unit (S171) for setting the threshold value so as to decrease the threshold value as the temperature of the inside air increases based on the detection value of the temperature sensor;
The control device , wherein the setting unit sets the threshold when the second determination unit determines that the detected temperature acquired last time and the detected temperature acquired this time do not match . The gas sensor is
  A first sensor (67) for detecting the concentration of the hydrocarbon gas as the concentration of the gas;
  A second sensor (68) for detecting the concentration of the nitrogen oxide gas as the concentration of the gas.
  A threshold used for determining the concentration of the hydrocarbon gas in the first determination unit is a first threshold,
  In the case where the threshold used for the determination of the concentration of the nitrogen oxide gas in the first determination unit is a second threshold,
  The control unit determines that the first determination unit determines that the concentration of the hydrocarbon gas is equal to or higher than the first threshold, and that the control unit determines that the concentration of the nitrogen oxide gas is equal to or higher than the second threshold. In either case when the determination unit determines, the door is controlled to close the outside air introduction port and open the inside air introduction port by the door,
  The controller determines that the first determination unit determines that the concentration of the hydrocarbon gas is less than the first threshold, and determines that the concentration of the nitrogen oxide gas is less than the second threshold. When the determination unit determines, controlling the door to open the outside air introduction port by the door and close the inside air introduction port,
The setting unit sets the first threshold so as to lower the first threshold as the temperature of the inside air increases based on the detection value of the temperature sensor, and based on the detection value of the temperature sensor, As the temperature increases, the second threshold is set so as to lower the second threshold,
4. The setting unit sets the first threshold and the second threshold when the second determination unit determines that the detected temperature acquired last time and the detected temperature acquired this time do not match with each other. 5. Control device. A door (35) for opening one of the outside air inlet (34) for introducing outside air and the inside air inlet (33) for introducing inside air and closing the other, and one of the outside air inlet and the inside air inlet. A casing (31) for circulating the introduced air into the vehicle interior, and a control device for controlling the vehicle air conditioning unit (30),
A first determination unit (S220) that determines whether the concentration of the gas is equal to or greater than a threshold based on a detection value of a gas sensor (67, 68) that detects a concentration of a gas that causes odor in the outside air; ,
When the first determination unit determines that the concentration of the gas is equal to or more than a threshold, the door is controlled to close the outside air introduction port and open the inside air introduction port by the door, and the concentration of the gas is equal to the threshold value. A control unit (S230) that controls the door so that the door opens the outside air introduction port and closes the inside air introduction port when the first determination unit determines that the number is less than
The detection humidity of the humidity sensor that detects the humidity of the inside air is repeatedly acquired, and each time the detection humidity of the humidity sensor is acquired, it is determined whether or not the previously acquired detection humidity and the currently acquired detection humidity do not match. A second determination unit (S190) to perform
A setting unit (S200) for setting the threshold so as to lower the threshold as the humidity of the inside air increases based on the detection value of the humidity sensor;
The control device, wherein the setting unit sets the threshold when the second determination unit determines that the detected humidity acquired last time and the detected humidity acquired this time do not match. The gas sensor is
A first sensor (67) for detecting the concentration of the hydrocarbon gas as the concentration of the gas;
A second sensor (68) for detecting the concentration of the nitrogen oxide gas as the concentration of the gas.
A threshold used for determining the concentration of the hydrocarbon gas in the first determination unit is a first threshold,
In the case where the threshold used for the determination of the concentration of the nitrogen oxide gas in the first determination unit is a second threshold,
The control unit determines that the first determination unit determines that the concentration of the hydrocarbon gas is equal to or higher than the first threshold, and that the control unit determines that the concentration of the nitrogen oxide gas is equal to or higher than the second threshold. In either case when the determination unit determines, the door is controlled to close the outside air introduction port and open the inside air introduction port by the door,
The controller determines that the first determination unit determines that the concentration of the hydrocarbon gas is less than the first threshold, and determines that the concentration of the nitrogen oxide gas is less than the second threshold. When the determination unit determines, controlling the door to open the outside air introduction port by the door and close the inside air introduction port,
The setting unit sets the first threshold so as to decrease the first threshold as the humidity of the inside air increases based on the detection value of the humidity sensor, and sets the inside air based on the detection value of the humidity sensor. As the humidity increases, the second threshold is set so as to lower the second threshold,
When the and the detected humidity acquired last obtained detection humidity and the time is determined said second judging section that the mismatch, according to claim 5, wherein the setting unit sets the first threshold and the second threshold value Control device.

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