JP2017077827A - Control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device that enables switching control of an inside/outside air switching door to correspond to sensibility of an occupant to odor.SOLUTION: An indoor air conditioning unit 30 includes gas sensors 67, 68 for detecting a concentration of gases (hydrocarbon gas, NOx) that become causes of odor included in outside air. An air-conditioning ECU 26 controls an inside/outside air switching door 35 to close an outside air introduction port 34 and open an inside air introduction port 33 by using the inside/outside air switching door 35 when determining that the gas concentration is larger than a threshold value and to open the outside air introduction port 34 and close the inside air introduction port 33 by using the inside/outside air switching door 35 when determining that the gas concentration is smaller than the threshold value. The air-conditioning ECU 26 sets the threshold value so as to lower the threshold value as a temperature detected by an inside air sensor 62 increases and lower the threshold value as humidity detected by a humidity sensor 66 increases.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a control device.

  Conventionally, in an air conditioner for a vehicle, an exhaust gas sensor that detects a gas concentration that is a dirty component in the outside air, and a gas concentration change rate are calculated according to a detection value of the exhaust gas sensor. Some have a control device that controls the inside / outside air switching door in comparison (see, for example, Patent Document 1).

  When it is determined that the gas concentration is higher than the determination reference value by comparing the gas concentration change rate with the determination reference value, the inside / outside air switching door is controlled to open the inside air introduction port and close the outside air introduction port. 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 to open the inside air introduction port and close the outside air introduction port.

  Here, when the occupant's sense 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.

Japanese Patent No. 3336917

  In general, a passenger's sense of smell changes depending on humidity and temperature conditions. For this reason, in the said vehicle air conditioner, the switching control of the inside / outside air switching door cannot be matched to the sense of the odor of the occupant that changes depending on the temperature and humidity conditions.

  An object of this invention is to provide the control apparatus which matched switching control of the inside / outside air switching door with the sense with respect to a passenger | crew's smell in view of the said point.

In order to achieve the above object, according to the first aspect of the present invention, the outside / inside air switching is performed by opening one of the outside air introduction port (34) for introducing outside air and the inside air introduction port (33) for introducing inside air and closing the other. A control device that controls a vehicle air conditioning unit (30) including a door (35) and a casing (31) that circulates air introduced from one of the outside air introduction port and the inside air introduction port toward the vehicle interior. There,
A determination unit (S220) that determines whether or not the concentration of the gas is greater than a threshold based on the detection value of the gas sensor (67, 68) that detects the concentration of the gas that causes odor in the outside air;
When the determination unit determines that the gas concentration is greater than the threshold, the inside / outside air switching door is controlled by the inside / outside air switching door so that the inside / outside air opening is opened and the inside / outside air switching door is opened. When the determination unit determines, a control unit (S230) that controls the inside / outside air switching door to open the outside air introduction port and close the inside air introduction port by the inside / outside air switching door,
The higher the inside air temperature is, the higher the inside air temperature is, and the lower the threshold value is set, the higher the inside air humidity is based on the detected value from the humidity sensor that detects the inside humidity. The setting part (S171, S200) which sets a threshold value so that a threshold value may be lowered is included.

  According to the first aspect of the present invention, the threshold value decreases as the inside air temperature increases, and the threshold value decreases as the inside air humidity increases. For this reason, the switching control of the inside / outside air switching door can be matched to the sense of the odor of the occupant.

In the invention according to claim 2, the outside air introduction door (34) for introducing outside air and the inside / outside air switching door (35) for opening one of the inside air introduction port (33) for introducing inside air and closing the other, A control device for controlling a vehicle air conditioning unit (30), comprising a casing (31) that circulates air introduced from one of the introduction port and the inside air introduction port toward the vehicle interior,
A determination unit (S220) that determines whether or not the concentration of the gas is greater than a threshold based on the detection value of the gas sensor (67, 68) that detects the concentration of the gas that causes odor in the outside air;
When the determination unit determines that the gas concentration is greater than the threshold, the inside / outside air switching door is controlled by the inside / outside air switching door so that the inside / outside air opening is opened and the inside / outside air switching door is opened. When the determination unit determines, a control unit (S230) that controls the inside / outside air switching door to open the outside air introduction port and close the inside air introduction port by the inside / outside air switching door,
And a setting unit (S171) that sets the threshold value so that the threshold value decreases as the temperature of the inside air increases based on the detection value of the temperature sensor that detects the temperature of the inside air.

  According to invention of Claim 2, a threshold value falls, so that the temperature of inside air becomes high. For this reason, the switching control of the inside / outside air inside / outside air switching door can be matched to the sense of the odor of the occupant.

In the invention according to claim 3, the outside air introduction door (34) for introducing outside air and the inside / outside air switching door (35) for opening one of the inside air introduction port (33) for introducing inside air and closing the other, A control device for controlling a vehicle air conditioning unit (30), comprising a casing (31) that circulates air introduced from one of the introduction port and the inside air introduction port toward the vehicle interior,
A determination unit (S220) that determines whether or not the concentration of the gas is greater than a threshold based on the detection value of the gas sensor (67, 68) that detects the concentration of the gas that causes odor in the outside air;
When the determination unit determines that the gas concentration is greater than the threshold, the inside / outside air switching door is controlled by the inside / outside air switching door so that the inside / outside air opening is opened and the inside / outside air switching door is opened. When the determination unit determines, a control unit (S230) that controls the inside / outside air switching door to open the outside air introduction port and close the inside air introduction port by the inside / outside air switching door,
A setting unit (S200) that sets the threshold value so that the threshold value decreases as the humidity of the indoor air increases based on the detection value of the humidity sensor that detects the humidity of the indoor air.

  According to invention of Claim 3, a threshold value falls, so that the humidity of inside air becomes high. For this reason, the switching control of the inside / outside air switching door can be matched to the sense of the odor of the occupant.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a figure which shows schematic structure of the vehicle air conditioner in 1st Embodiment. It is an electric circuit diagram which shows the electrical connection relationship of the gas sensor in FIG. It is a flowchart which shows the air-conditioning control process of the air-conditioner ECU of FIG. It is a flowchart which shows a part of inside / outside air switching control process of the air-conditioner ECU of FIG. It is a flowchart which shows the remainder of the inside / outside air switching control process of the air-conditioner ECU of FIG. 6 is a map for determining a determination reference value used in the inside / outside air switching control process of FIG. 5. 6 is a map for determining a determination reference 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 processing of FIG. 5. It is a flowchart which shows the internal / external air switching control process of air-conditioner ECU of 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 internal / external air switching control processing of air-conditioner ECU of 3rd Embodiment. 13 is a map for determining a determination reference value used in the inside / outside air switching control process of FIG. 12. 13 is a map for determining a determination reference 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 given the same reference numerals in the drawings in order to simplify the description.

(First embodiment)
The vehicle air conditioner includes an indoor air conditioning unit 30. The indoor air-conditioning unit 30 is a vehicle air-conditioning unit that is disposed inside an instrument panel (instrument panel) inside the foremost part of the vehicle interior. The indoor air conditioning unit 30 has a case 31 and constitutes 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 inlet 33 and the outside air inlet 34 are switched by an inside / outside air switching door 35. The inside / outside air switching door 35 is driven by a servo motor 36.

  On the downstream side of the inside / outside air switching box 32, an electric blower 37 that blows air toward the passenger compartment is disposed. The blower 37 is configured to drive a centrifugal blower fan 37a by a motor 37b. An evaporator 38 serving as a cooling heat exchanger for cooling the blown air is disposed on the downstream side of the blower 37.

  The evaporator 38 is one of the elements constituting the refrigeration cycle apparatus 39, and cools the blown air by evaporating the low-temperature and low-pressure refrigerant by absorbing heat from the blown air. Note that the refrigeration cycle apparatus 39 is a well-known one so 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 apparatus 39, the compressor 40 is driven by a traveling engine (not shown) through an electromagnetic clutch 40a. Therefore, the operation of the compressor 40 can be intermittently controlled by the energization of the electromagnetic clutch 40a.

  On the other hand, in the indoor air conditioning unit 30, a heater core 44 that heats the air flowing in the case 31 is disposed downstream of the evaporator 38. The heater core 44 is a heating heat exchanger that heats the air (cold air) that has passed through the evaporator 38 by using warm 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.

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

  The ratio of the amount of air passing through the heater core 44 (warm air amount) and the amount of air passing through the bypass passage 45 and bypassing the heater core 44 (cold air amount) is adjusted by the opening of the air mix door 46, The temperature of the air blown into the room is adjusted.

  At the most downstream part of the air passage of the case 31, a defroster blowing opening 48 for blowing conditioned air toward the front window glass of the vehicle, and a face blowing opening 49 for blowing conditioned air toward the occupant's face. In addition, there are provided three types of air outlets, a foot air outlet 50 for blowing air-conditioned air toward the feet of the occupant.

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

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

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

  The air conditioner ECU 26 receives detection signals from the well-known air conditioning sensor groups 61 to 65 and various operation signals from the air conditioning operation panel 70.

  Specifically, the air conditioning sensor group includes an outside air sensor 61 that detects an outside air temperature (outside temperature) Tam, an inside air sensor 62 that detects a temperature TR in the vehicle interior, and the amount of solar radiation that enters the vehicle interior. A solar radiation sensor 63 that detects Ts, an evaporator temperature sensor 64 that is disposed in the air blowing portion of the evaporator 38 and detects the evaporator blowing air temperature Te, and a temperature Tw of hot water (engine cooling water) flowing into the heater core 44 is detected. A water temperature sensor 65 that detects the humidity RH, which is the relative humidity inside the vehicle interior, and detects the concentration of hydrocarbon gases and carbon monoxide (CO) contained in the air outside the vehicle interior (hereinafter referred to as outside air). Gas sensor 67 that detects the concentration of nitrogen oxide gas (niTRogen oxides) contained in the outside air is provided.

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

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

  The air-conditioning operation panel 70 includes a temperature setting switch 71 serving as a temperature setting means for setting the passenger compartment temperature, and a blowing mode switch 72 for manually setting a blowing mode switched by the blowing mode doors 51 to 53. An internal / external air switching switch 73 for manually setting the internal / external air suction mode by the internal / external air switching door 35, an air conditioner switch 74 for issuing an operation command signal for the compressor 40 (that is, an ON signal for the electromagnetic clutch 40a), and an air volume for the blower 37 are set manually. There are provided a blower operation switch 75 for performing the operation, an auto switch 76 for outputting a command signal for the air conditioning automatic control state, and the like.

  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), or the like is used.

  The face mode is a mode in which the face blowout opening 49 is opened and the foot blower outlet 50 and the defroster blowout opening 48 are closed. The foot mode is in a state in which the face blowout opening 49 is closed and the foot blower outlet 50 is opened. Further, the defroster blowout opening 48 is slightly opened. The bi-level mode is a mode in which the face blowout opening 49 and the foot blowout opening 50 are opened, and the defroster blowout opening 48 is closed. The foot differential mode is a mode in which the face outlet opening 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 closed and the defroster blowout opening 48 is further opened.

  Connected to the output side of the air conditioner ECU 26 are an electromagnetic clutch 40a of the compressor 40, servo motors 36, 47, and 54 as electric drive means for each device, a motor 37b of the blower 37, a motor 41b of the condenser cooling fan 41a, and the like. 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, 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 the voltage V2 between the positive electrode and the negative electrode of the gas sensor 68, and 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, the resistance value of the gas sensor 68. 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 and DC power is supplied from the battery to the air conditioner ECU 26, the routine of FIG. 3 is started to perform each initialization (step 1). The ignition switch is a power switch that supplies electric power to a traveling engine or the like.

  Subsequently, a switch signal is read from each switch such as the temperature setting switch 71 (step 2).

  Subsequently, a signal obtained by A / D conversion of the sensor signal is 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 air blown into the vehicle interior is calculated based on the following formula 1 stored in advance in the ROM (step 4).

TAO = Kset × Tset−KR × TR
−KAM × TAM−KS × TS + C (Formula 1)
The target blowing temperature TAO is an air temperature that needs to be blown from the blowing openings 48 to 50 in order for the vehicle interior temperature to maintain 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) is performed to determine the blower voltage corresponding to the cooling water temperature (TW) detected by the water temperature sensor 65 from the characteristic diagram stored in advance in the memory. 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, the blower voltage corresponding to the target blowing temperature (TAO) is applied to the motor 37b for the blower fan 37a from the characteristic chart stored in advance in the memory. Voltage) is determined (step 5).

  The blower voltage determined in this way and the amount of air blown out from the blower 37 (hereinafter referred to as blower level) are in a one-to-one relationship.

  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).

  When 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 selected based on the target blow temperature TAO based on the characteristic chart stored in the memory in advance. The mode is determined as the outlet mode to be implemented.

  On the other hand, when the user manually sets the air outlet mode with respect to the air outlet mode switch 72, this one manually set mode is determined as the air outlet mode to be implemented.

  Thus, it determines as a blower outlet mode which should be implemented based on the manual setting with respect to the blowout mode switch 72, or the target blowing temperature TAO.

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

  When calculated as SW ≦ 0 (%), the air mix door 46 is controlled to a position (MAXCOOL position) in which all of the cool air from the evaporator 38 is bypassed from the heater core 44. When calculated as SW ≧ 100 (%), the air mix door 46 is controlled to a position (MAXHOT position) through which all of the cool air from the evaporator 38 passes through the heater core 44.

  Further, when calculated as 0 (%) <SW <100 (%), the air mix door 46 passes a part of the cool air from the evaporator 38 through the heater core 44 and bypasses the rest of the cool air from the heater core 44. Controlled.

  Subsequently, when the air conditioner switch 74 is ON, the operating state of the compressor 40 is determined. That is, starting and stopping 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 40a is activated so that the compressor 40 is started (ON). The refrigeration cycle apparatus 39 is operated by energization control (ON). That is, the air cooling action of the evaporator 38 is activated.

  Further, when the post-evaporation temperature (TE) detected by the evaporator temperature sensor 64 is equal to or lower than the second frost temperature (for example, 3 ° C.) lower than the first frost temperature, the operation of the compressor 40 is stopped (OFF). ), The electromagnetic clutch 40a is energized (OFF) to stop the operation of the refrigeration cycle apparatus 39. That is, the air cooling action of the evaporator 38 is stopped.

  Subsequently, control signals are supplied 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 the respective steps 5, 6, 7, 9 are obtained. Is output (step 9A).

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

  When the elapsed time is less than the control cycle time t, it is determined as NO in Step 10, and the process returns to Step 9B. For this reason, as long as the elapsed time is less than the control cycle time t, the NO determination in step 9B is repeated. Thereafter, when the elapsed time becomes equal to or longer than the control cycle time t, it is determined as YES in Step 10 and the process returns to Step 2. Thereafter, the processes of steps 2, 3, 4,..., 7, 8, and 9 are repeated.

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

  Next, in step 120, the voltage V1 between the positive electrode and the negative electrode of the gas sensor 67 is read, and the gas sensor 67 is 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 resistance value Rgas1a 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 the gas sensor 68 is based on the read voltage V2, the resistance value of the resistance element R2, and the output voltage of the constant voltage power supply Vd. The resistance value Rgas2a is obtained.

  In the next step 130, the vehicle interior temperature TR_old, the vehicle interior humidity RH_old, the determination reference value Ls1, and the determination reference value Ls2 used to control the inside / outside air switching door 35 are initialized.

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

  Further, initial values are set to the determination reference values Ls1 and Ls2, respectively. The determination reference value Ls1 is a reference value used for comparing the rate of change of hydrocarbon gas described later. The determination reference value Ls2 is a reference value used for comparing the rate of change of 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 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 value among 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 for the first time after the ignition switch is turned on, the resistance value Rgas2a obtained in step 121 is set as the gas concentration reference value Rair2.

  Next, in step 150, as in 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 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 are read. A resistance value Rgas2 of the gas sensor 68 is obtained based on the output voltage.

  Next, in step 160, a gas concentration change rate Ln1 is calculated. The gas concentration change rate Ln1 indicates the 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 Equation 3.

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

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

  Specifically, the gas concentration change rate Ln2 is obtained as shown in the following Equation 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 passenger compartment temperature has changed. Specifically, the vehicle interior temperature TR that is an output signal of the inside air sensor 62 is acquired, and it is determined whether or not the vehicle interior temperature TR matches the vehicle interior temperature TR_old acquired last time.

  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 coincide with the previous vehicle interior temperature TR_old, it is determined in step 170 that the vehicle interior temperature has changed, YES. In this case, it is decided to change the determination reference values Ls1 and Ls2 (step 171). In addition, the vehicle interior temperature TR acquired 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 or not the humidity inside the vehicle has changed. Specifically, the vehicle interior humidity RH that is an output signal of the humidity sensor 66 is acquired, and it is determined whether or not the vehicle interior humidity RH matches the vehicle interior humidity RH_old acquired last time.

  For example, when the vehicle interior humidity RH matches the previous vehicle interior humidity RH_old, NO is determined in step 190 because the vehicle interior humidity has not changed. 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 determination 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).

  Thus, when one of the vehicle interior temperature and the vehicle interior humidity changes, it is determined that one of the steps 170 and 190 is YES. In this case, 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 for determining the gas concentration of hydrocarbon gas or carbon monoxide (CO) when the inside / outside air switching door 35 is controlled.

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

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

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

  Therefore, in this 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 determined from the map of FIG. 6. The criterion value Ls1 corresponding to is selected.

  FIG. 7 shows a map showing the relationship between the passenger compartment temperature, the passenger compartment humidity, and the determination reference value Ls2. The determination reference value Ls2 includes three values of “large”, “medium”, and “low”.

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

  Therefore, in this 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 determined from the map in FIG. 7. The criterion value Ls2 corresponding to is selected.

  When either 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 the current step 220.

  On the other hand, if the passenger compartment temperature does not change and the passenger compartment humidity does not change, NO is determined in steps 170 and 190, respectively. In this case, it is decided not to change the determination reference values Ls1 and Ls2. That is, it is determined that the determination reference values Ls 1 and Ls 2 used in the previous step 220 are used in the current step 220.

  Next, using the determination reference values Ls1 and Ls2 determined in this way, it is determined which one of the inside air introduction mode and the outside air introduction mode should be performed (step 220).

  (1) It is determined whether or not the concentration of the hydrocarbon gas contained in the outside air is equal to or higher than the first threshold value by determining whether or not the gas concentration change rate Ln1 is equal to or lower than the determination reference value Ls1.

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

  For example, (a) when the gas concentration change rate Ln1 is equal to or lower than the determination reference value Ls1, and the gas concentration change rate Ln2 is equal to or higher than the determination reference value Ls2, the concentration of the hydrocarbon gas is equal to or higher than the first threshold value, and nitrogen It determines with the density | concentration of oxide gas being more than a 2nd threshold value. In this case, it is determined that the inside air introduction mode should be implemented.

  (B) When the gas concentration change rate Ln1 is equal to or less than the determination reference value Ls1, and the gas concentration change rate Ln2 is less than the determination reference value Ls2, the concentration of the hydrocarbon gas is equal to or higher than the first threshold value, and nitrogen oxides 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 implemented.

  (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 concentration of the hydrocarbon gas is less than the first threshold value, and nitrogen oxides It is determined that the gas concentration is greater than or equal to the second threshold. In this case, it is determined that the inside air introduction mode should be implemented.

  (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 concentration of the hydrocarbon gas is less than the first threshold value, and nitrogen oxides 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.

In this way, it is determined that the inside air introduction mode or the outside air introduction mode should be implemented 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 servo motor 36 so as 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 this step 140, 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 the present step 141, the smallest value 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.

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

  In this 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 or not 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 that is an output signal of the humidity sensor 66 is acquired, and it is determined whether 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, one of steps 170 and 190 is determined as YES. In this case, the determination reference values Ls1 and Ls2 are changed. It is determined which one of the inside air introduction mode and the outside air introduction mode should be implemented using the changed determination reference values Ls1 and Ls2 (step 220). The outside air switching door 35 is controlled via the servo motor 36 so as 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 steps 170 and 190, respectively.

  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. Based on the determination reference values Ls1 and Ls2 decided to be used, it is determined which one of the inside air introduction mode and the outside air introduction mode should be performed (step 220). The outside air switching door 35 is controlled via the servo motor 36 so as to execute the determined inside air introduction mode or outside air introduction mode (step 230).

  Then, each process of step 140, 141, 150, 151, 160, 161, 170, 171, 180, 190, 200, 210, 220, 230 is repeated.

  Here, in the N-th 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 value among 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 step 150 for the Nth time, the resistance value Rgas1 of the gas sensor 67 is obtained. In step 151 for the Nth time, the 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 the N-th step 161, the gas concentration change rate Ln2 is calculated based on the gas concentration reference value Rair2 and the resistance value Rgas2.

  Here, when either one of the vehicle interior temperature and the vehicle interior humidity changes, it is determined that one of the steps 170 and 190 is YES, and the determination reference values Ls1 and Ls2 are changed. It is determined which one of the inside air introduction mode and the outside air introduction mode should be implemented using the changed determination reference values Ls1 and Ls2 (step 220). The outside air switching door 35 is controlled via the servo motor 36 so as to execute the determined inside air introduction mode or outside air introduction mode (step 230).

  On the other hand, if the passenger compartment temperature does not change and the passenger compartment humidity does not change, NO is determined in steps 170 and 190, respectively. In this case, it is decided not to change the determination reference values Ls1 and Ls2. That is, it is determined that the determination reference values Ls 1 and Ls 2 used in the previous step 220 are used in the current step 220. Based on the determination reference values Ls1 and Ls2 decided to be used, it is determined which one of the inside air introduction mode and the outside air introduction mode should be performed (step 220). The outside air switching door 35 is controlled via the servo motor 36 so as to execute the determined inside air introduction mode or outside air introduction mode (step 230).

  According to the 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 that opens one and closes the other. The indoor air conditioning unit 30 includes a gas sensor 67 for detecting the concentration of a hydrocarbon gas that causes a bad odor contained in the outside air, and a gas sensor for detecting the concentration of a nitrogen oxide gas that causes a bad odor contained in the outside air. 68.

  The air conditioner ECU 26 determines whether the concentration of the hydrocarbon gas is larger than the first threshold based on the detection value of the gas sensor 67. The air conditioner ECU 26 determines whether or not the concentration of the nitrogen oxide gas is larger 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 greater than or equal to the first threshold and when the concentration of the nitrogen oxide gas is greater than or equal to the second threshold. 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 and opens 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 valve. The indoor air conditioning unit 30 includes an inside air sensor 62 that detects the temperature of the inside air and a humidity sensor 66 that detects the humidity of the inside air.

  Here, when the passenger compartment is hot and humid, an environment is created in the passenger compartment that makes it easier for passengers to feel the smell. There are four reasons for this.

  A: When the temperature in the passenger compartment is high, the amount of odorous substances that volatilizes increases and the odor becomes much stronger.

  B: When the humidity in the passenger compartment is high, the humidity of the olfactory mucosa of the nose that feels odor increases, and the sensitivity to odor increases.

  C: When the temperature in the passenger compartment increases, the convection of the passenger compartment increases and the nasal olfactory mucosa is exposed to odorous components.

  D: When the temperature and humidity in the passenger compartment increase, the incidence of decay and the incidence of mold, which are sources of unpleasant odor, increase.

  Therefore, in the present embodiment, the first threshold value and the second threshold value are set so as to lower the first threshold value and the second threshold value as the temperature in the vehicle interior increases based on the detected value of the inside air sensor 62. The first threshold value and the second threshold value are set so as to decrease the first threshold value and the second threshold value as the humidity in the passenger compartment increases based on the detection value of the humidity sensor 66 (see FIG. 8). For this reason, the switching control of the inside / outside air switching door 35 can be matched to the sense of the odor of the passenger.

  In connection with this, inside air fixed time T2, T3, T4 (refer FIG.8 (e)) can be set to the time according to a passenger | crew's smell sensitivity. The inside air fixing times T2, T3, and T4 are periods in which the inside / outside air switching door 35 opens the inside air introduction port 33 and closes the outside air introduction port 34. Furthermore, there is no need for the occupant to adjust the first threshold value and the second threshold value, and there is a safety joy in driving the vehicle.

(Second Embodiment)
In the first embodiment, the 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 and the first embodiment are the same except for the inside / outside air switching control processing of the air conditioner ECU 26. Therefore, hereinafter, the inside / outside air switching control process of the air conditioner ECU 26 will be described with reference to FIG. 9, the same reference numerals as those in FIGS. 4 and 5 indicate the same steps, and the description thereof is omitted.

  The air conditioner ECU 26 executes the inside / outside air switching control process of FIG. 9 instead of FIGS. 4 and 5.

  FIG. 9 includes step 130A in which step 110, steps 190, 200, and 210 are deleted from FIGS. 4 and 5 and step 130 is replaced. Step 130A is a process 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.

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

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

  Therefore, in this embodiment, the vehicle interior temperature TR_old is set to 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 showing the relationship between the vehicle interior temperature and the determination reference value Ls2. In FIG. 11, the determination reference 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 this 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.

  In this way, the determination reference values Ls1 and Ls2 are selected. The selected Ls1 is compared with the gas concentration change rate Ln1. The determination 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 implemented as in the first embodiment. The outside air switching door 35 is controlled via the servo motor 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 selects one of the hydrocarbon gas concentration is equal to or higher than the first threshold value and the nitrogen oxide gas concentration is equal to or higher than the second threshold value. At this time, the inside / outside air switching door 35 closes the outside air introduction port 34 and opens the inside air introduction port 33. 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 and opens 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 valve.

  Therefore, in the present embodiment, the first threshold value and the second threshold value are set so as to lower the first threshold value and the second threshold value, respectively, as the temperature in the vehicle interior increases based on the detection value of the inside air sensor 62. For this reason, the switching control of the inside / outside air switching door 35 can be matched to the sense of the odor of the passenger.

(Third embodiment)
In the first embodiment, the 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 humidity RH. The third embodiment will be described.

  The present embodiment and the first embodiment are the same except for the inside / outside air switching control processing of the air conditioner ECU 26. Therefore, hereinafter, the inside / outside air switching control processing of the air conditioner ECU 26 will be described with reference to FIG. 12, the same reference numerals as those in FIGS. 4 and 5 indicate the same steps, and the description thereof is omitted.

  The air conditioner ECU 26 executes the inside / outside air switching control process of FIG. 12 instead of FIGS. 4 and 5.

FIG. 12 includes Step 130B in which Step 100, Steps 170, 171, and 180 are deleted from FIGS. 4 and 5, and Step 130 is replaced. Step 130B is a process of initializing the vehicle interior humidity RH_old, the determination reference value Ls1, and the determination reference value Ls2 used to control the inside / outside air switching door 35. Therefore, the air conditioner ECU 26 of the present embodiment
The determination reference values Ls1 and Ls2 are determined based on the humidity in the passenger compartment regardless of the temperature in the passenger compartment.

  FIG. 13 shows a map showing the relationship between the vehicle interior humidity and the determination reference value Ls1. In the map of FIG. 13, the determination reference 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 to 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 of FIG.

  FIG. 14 shows a map showing the relationship between the vehicle interior temperature and the determination reference value Ls2. In the map of FIG. 14, the determination reference 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 this 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 of FIG.

  In this way, the determination reference values Ls1 and Ls2 are selected. The selected Ls1 is compared with the gas concentration change rate Ln1. The determination 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 implemented as in the first embodiment. The outside air switching door 35 is controlled via the servo motor 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 selects one of the hydrocarbon gas concentration is equal to or higher than the first threshold value and the nitrogen oxide gas concentration is equal to or higher than the second threshold value. At this time, the inside / outside air switching door 35 closes the outside air introduction port 34 and opens the inside air introduction port 33. 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 and opens 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 valve.

  In the present embodiment, the first threshold value and the second threshold value are set so as to decrease the first threshold value and the second threshold value as the humidity in the vehicle interior increases based on the detection value of the humidity sensor 66. For this reason, the switching control of the inside / outside air switching door 35 can be matched to the sense of the odor of the passenger.

(Other embodiments)
(1) In the first, second, and third embodiments, the example in which hydrocarbon gas or nitrogen oxide gas is used as the gas that causes odor in the outside air has been described. Gases other than hydrogen gas and nitrogen oxide gas may be used as gases that cause odors in the outside air.

  (2) In the first, second, and third embodiments, the example in which the semiconductor sensor is used as the gas sensor 67 or 68 has been described. However, the present invention is not limited thereto, and a sensor other than the semiconductor sensor is used as the gas sensor 67 or 68. May be.

  (3) It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope described in the claims. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like.

26 Air conditioner ECU
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 (3)

From one of the outside air introduction port and the inside air introduction port, an outside air introduction port (34) for introducing outside air, a door (35) that opens one of the inside air introduction port (33) for introducing inside air and closes the other, and A control device for controlling a vehicle air-conditioning unit (30) comprising a casing (31) for circulating the introduced air toward the vehicle interior,
A determination unit (S220) for determining whether or not the concentration of the gas is 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 determination unit determines that the gas concentration is greater 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 gas concentration is less than the threshold value. A controller (S230) for controlling the door to open the outside air introduction port and close the inside air introduction port by the door when the determination unit determines that the size is small;
Based on the detected value of the temperature sensor that detects the temperature of the inside air, the threshold value is set so as to decrease as the temperature of the inside air increases, and based on the detected value of the humidity sensor that detects the humidity of the inside air A setting unit (S171, S200) for setting the threshold value so as to decrease the threshold value as the humidity of the inside air increases;
A control device comprising: From one of the outside air introduction port and the inside air introduction port, an outside air introduction port (34) for introducing outside air, a door (35) that opens one of the inside air introduction port (33) for introducing inside air and closes the other, and A control device for controlling a vehicle air-conditioning unit (30) comprising a casing (31) for circulating the introduced air toward the vehicle interior,
A determination unit (S220) for determining whether or not the concentration of the gas is 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 determination unit determines that the gas concentration is greater 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 gas concentration is less than the threshold value. A controller (S230) for controlling the door to open the outside air introduction port and close the inside air introduction port by the door when the determination unit determines that the size is small;
A setting unit (S171) for setting the threshold value to lower the threshold value as the temperature of the indoor air increases based on a detection value of a temperature sensor that detects the temperature of the internal air;
A control device comprising: From one of the outside air introduction port and the inside air introduction port, an outside air introduction port (34) for introducing outside air, a door (35) that opens one of the inside air introduction port (33) for introducing inside air and closes the other, and A control device for controlling a vehicle air-conditioning unit (30) comprising a casing (31) for circulating the introduced air toward the vehicle interior,
A determination unit (S220) for determining whether or not the concentration of the gas is 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 determination unit determines that the gas concentration is greater 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 gas concentration is less than the threshold value. A controller (S230) for controlling the door to open the outside air introduction port and close the inside air introduction port by the door when the determination unit determines that the size is small;
A setting unit (S200) for setting the threshold value to lower the threshold value as the humidity of the indoor air increases based on a detection value of a humidity sensor that detects the humidity of the indoor air;
A control device comprising:

Images