JP4430249B2 - Air conditioning controller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air-conditioning control device that switches between inside and outside air in a vehicle interior using a gas sensor that detects the degree of contamination of outside air.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a vehicle air conditioner including an outside air mode in which air from outside the vehicle is taken into the vehicle for air conditioning, and an inside air mode in which air conditioning is performed using the air in the vehicle. Conventionally, there is known a vehicle air conditioner including an inside / outside air switching control device using a gas sensor that detects the degree of dirtiness of outside air.
[0003]
The vehicle air conditioner provided with the gas sensor switches between the inside air mode and the outside air mode using a ratio between the degree of dirt outside the passenger compartment detected by the gas sensor and the standard degree of dirt. At this time, in the conventional vehicle air conditioner, the automatic intake control is performed so that the inside / outside air switching door is automatically set to the outside air mode or the inside air mode by the servo motor.
[0004]
In this vehicle air conditioner, the gas concentration is calculated based on the ratio (Rs / R0) to the gas resistance value Rs of the gas sensor in which the outside air is dirty, based on the air resistance value R0 of the gas sensor in clean outside air. .
[0005]
In addition, in the conventional vehicle air conditioner, there are many factors that vary the sensor value, such as single unit variation in which the sensor value varies for each gas sensor, sensor value variation due to deterioration over time, humidity dependency, and the like. Therefore, in the conventional vehicle air conditioner, when the gas sensor is started to be used, an operation of updating the cleanest air resistance value R0 every time from turning on the power is performed. When the air resistance value Rs close to the air resistance value R0 is obtained while the vehicle is running, it is determined that the outside air is clean and a large amount of outside air is taken in for air conditioning, and the air resistance value Rs farther than the air resistance value R0 is set. When it is obtained, it is determined that the outside air is dirty and air conditioning is performed with the inside air.
[0006]
[Problems to be solved by the invention]
However, in the conventional vehicle air conditioner, when the vehicle starts running from a place where the outside air is dirty, the reference clean air resistance value R0 becomes dirty air. When intake control is performed, dirty outside air is determined to be clean, and dirty outside air enters the vehicle interior. As a result, there is a problem that the passenger is uncomfortable.
[0007]
Therefore, the present invention has been proposed in view of the above-described circumstances, and an object of the present invention is to provide an air conditioning control device that can perform auto intake control without determining a reference value with dirty outside air.
[0008]
[Means for Solving the Problems]
  In order to solve the above-described problem, an air conditioning control device according to claim 1 is an air conditioning control that performs control to switch between an inside air mode and an outside air mode in accordance with a sensor signal from a gas sensor that detects the degree of contamination of outside air outside the vehicle. In the apparatus, storage means for storing a first sensor value indicating the degree of contamination of outside air previously acquired by the gas sensor, input means for inputting a second sensor value currently detected by the gas sensor, and storage in the storage means The calculation means for acquiring a reference value based on the first sensor value thus obtained and the second sensor value input by the input means, and the reference value acquired by the calculation means is compared with the second sensor value. And air conditioning control means for performing control to switch between the inside air mode and the outside air mode. The air-conditioning control means is based on the second sensor value and the first sensor value before a predetermined period of time, and when the current outside air is dirty than the previous outside air, the inside air mode and the outside air are based on the first sensor value. Control to switch between modesIn addition, if the current outside air is not dirty than the previous outside air, the control is performed to switch between the inside air mode and the outside air mode based on the second sensor value,After the predetermined period, control is performed to switch between the inside air mode and the outside air mode using the reference value acquired by the calculating means.
[0009]
  In the air conditioning control device according to claim 2,The predetermined period is a period provided for updating the reference value when the air concentration around the vehicle is stabilized after the ignition switch of the vehicle is turned on.The
[0010]
  In the air conditioning control device according to claim 3, the computing means isImmediately after the predetermined time, based on the second sensor value and the first sensor value, if the current outside air is dirty than the previous outside air,A reference value is obtained by calculating an average value of the first sensor value stored in the storage means and the second sensor value input by the input means.
[0013]
【The invention's effect】
  According to the air conditioning control device of the first aspect, the first sensor value previously acquired is stored in the storage unit in advance, and when the reference value of the current air conditioning control is determined, the stored first sensor value; A reference value is acquired based on the second sensor value acquired this time, the acquired reference value is compared with the second sensor value, and control is performed to switch between the inside air mode and the outside air mode. Even if the area is dirty, it is possible to control the switching between the inside air mode and the outside air mode by suppressing the intake of dirty air into the vehicle interior without determining the reference value with dirty outside air.
  According to the air conditioning control device of the first aspect, based on the second sensor value and the first sensor value before the lapse of the predetermined period, and based on the first sensor value when the current outside air is dirty than the previous outside air. The control of switching between the inside air mode and the outside air mode is performed, and after the predetermined period, the control is performed to switch between the inside air mode and the outside air mode using the reference value acquired by the calculation means, so that the air concentration around the vehicle is stable. In this case, it is possible to control to automatically switch between the inside air mode and the outside air mode by updating the reference value.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
[Configuration of vehicle air conditioner]
In FIG. 1, the whole structure of the own vehicle 1 provided with the vehicle air conditioner 20 is shown. As can be seen from FIG. 1, a gas sensor 2 that detects the degree of contamination of the outside air based on exhaust gas from the preceding vehicle 10 or the like is provided at the front end 1 a of the host vehicle 1. A vehicle air conditioner 20 that is used to control air conditioning in the passenger compartment is provided. The gas sensor 2 and the vehicle air conditioner 20 are connected to a control device 30 that controls the auto intake operation of the vehicle air conditioner 20 based on the sensor detection value of the gas sensor 2.
[0020]
The gas sensor 2 is used when the exhaust gas is suppressed from entering the vehicle interior in response to the exhaust gas of the leading vehicle 10. The gas sensor 2 mainly includes a sensor unit that detects the degree of contamination of the outside air and sends a sensor signal to the control device 30, and a heater unit that performs heating for operating the sensor unit.
[0021]
The sensor unit is, for example, SnO that is an n-type semiconductor.₂Is formed and sintered. The heater unit generates heat when a voltage is applied to activate the oxidation-reduction reaction of the sensor unit. When the sensor section is heated to a predetermined temperature, the resistance value changes due to adhesion of dirt components contained in the outside air such as exhaust gas to the surface, and the sensor signal is controlled according to the resistance value. Output to device 30. In addition, although this example demonstrates the gas sensor 2 provided with the sensor part to which resistance value becomes small when a dirt component adheres, it is not limited to this.
[0022]
The control device 30 obtains a resistance value at the time of gas reaction based on a sensor signal from the sensor unit, calculates a gas concentration by a ratio with a resistance value at the time of clean air of the sensor unit, and is equal to or less than a reference value. Sometimes, it is determined that the outside air is dirty, and auto intake control is performed to limit the intake of outside air into the vehicle interior.
[0023]
In FIG. 2, the structural example of the vehicle air conditioner 20 is shown. The vehicle air conditioner 20 is a so-called front / rear / left / right independent temperature control air conditioner, and mainly controls the temperature by dividing a vehicle interior into four regions, and includes an intake unit 110, a cooler unit 120, and a heater unit 130. Has been.
[0024]
In the following description, the front / rear / left / right independent temperature control type air conditioner is taken as an example, but the present invention is not limited to this.
[0025]
The intake unit 110 is provided with an intake door 113 that opens and closes the outside air inlet 111 and the inside air inlet 112 at any opening degree, and a fan 115 that is rotated by a motor 114. While the mixing ratio of the inside and outside air introduced into the room is determined, the amount of air introduced into the vehicle interior is determined according to the rotational speed of the fan 115. The intake door 113 is driven and controlled by an intake door actuator 116, and the motor 114 is driven and controlled by a fan control amplifier 117.
[0026]
The cooler unit 120 is provided with an evaporator 121 (evaporator) for cooling the air introduced by the intake unit 110, and the evaporator 121 includes a compressor, a condenser (condenser), an expansion valve, a liquid tank, and the like. The cooled cooling cycle (not shown) is connected, and the refrigerant compressed by the compressor is supplied.
[0027]
The heater unit 130 is provided with a heater core 131 through which engine cooling water circulates, and bypass paths 132 and 132 that bypass the heater core 131 are formed on both sides thereof. The air flowing down the cooler unit 120 is heated by passing through the heater core 131.
[0028]
In the heater unit 130, two air mix doors, a front air mix door 133f and a rear air mix door 133r, are provided on the upstream side of the heater core 131 so as to be rotatable. The front air mix door 133f is for controlling the temperature of the conditioned air blown to the front seat, whereas the rear air mix door 133r is for controlling the temperature of the conditioned air blown to the rear seat. Is. That is, for the front air mix door 133f, the ratio of the amount of air that passes through half of the heater core 131 and the amount of air that passes through the bypass flow path 132 is determined according to the opening, and thereby the front seat side air distribution The temperature of the air flowing down to the passage 135f is adjusted. Similarly, for the rear air mix door 133r, the temperature of the air flowing down to the rear seat air distribution passage 135r is adjusted according to the opening degree of the rear air mix door 133r.
[0029]
These two front air mix doors 133f and rear air mix door 133r are driven and controlled by a front air mix door actuator 134f and a rear air mix door actuator 134r, respectively.
[0030]
Further, the downstream side of the heater core 131 is divided into a front seat side air distribution passage 135f and a rear seat side air distribution passage 135r by a partition wall 136, and the front seat side air distribution passage 135f to the front seat side includes: A front-seat differential outlet 137, a front-seat differential door 137D that opens and closes the front-seat vent outlet 138, a front-seat vent outlet 138D that opens and closes the front-seat vent door 138D, a front-seat foot outlet 139, and a front-seat foot door 139 that opens and closes each are provided. It has been. Since the combination of the opening / closing positions of the three front seat doors 137D, 138D, and 139D is determined in the front-seat air outlet mode, the front mode actuator 140 collectively controls driving through the link mechanism.
[0031]
On the other hand, the air distribution passage 135r formed on the downstream side of the heater core 131 toward the rear seat side distributes air flowing through the front seat side air distribution passage 135f and the rear seat side air distribution passage 135r. A rear mode door 145 for adjusting the air distribution ratio of conditioned air blown out from each of the front and rear air distribution ratio adjusting door 141D for adjusting the ratio, the rear seat vent outlet 143 and the rear seat foot outlet 144. And are provided.
[0032]
The front / rear air distribution ratio adjustment door 141D is driven and controlled by the front / rear air distribution ratio adjustment door actuator 142, and can rotate between a position where the rear seat side air distribution passage 135r is fully opened and a position where it is fully closed. When the front / rear air distribution ratio adjusting door 141D is rotated to a position where a part of the rear seat air distribution passage 135r is shielded, the partition between the front seat air distribution passage 135f and the rear seat air distribution passage 135r is separated. Since a part of the communication passage 141 opened in the wall 136 is opened, a part of the conditioned air that has passed through the rear seat side of the heater core 131 flows down to the front seat side air distribution passage 135f, and is thereby blown out to the front seat side. The amount of air distribution increases relative to the rear seat side.
[0033]
Since the front / rear air distribution ratio adjusting door 141D is provided to make the temperature difference between the front seat side and the rear seat side more sensitive, it is preferable for the independent temperature control type air conditioner of the present invention. Although it is a form, it is not necessarily essential.
[0034]
The rear mode door 145 is driven and controlled by the rear mode door actuator 146, and the ratio of the conditioned air flowing down to the rear seat vent outlet 143 and the rear seat foot outlet 144 according to the opening degree of the rear mode door 145. Is adjusted.
[0035]
A front duct 147f and a rear duct 147r shown in FIG. 3 are connected to the front seat side air distribution passage 135f and the rear seat side air distribution passage 135r, respectively. More specifically, a front duct 147f is connected to each of the front seat vent air outlet 138 and the front seat foot air outlet 139 of the front seat air distribution passage 135f, and the rear seat air distribution passage 135r. A rear duct 147r is connected to each of the rear seat vent outlet 143 and the rear seat foot outlet 144. FIG. 3 illustrates one of each.
[0036]
For example, in the front duct 147f connected to the front seat vent outlet 138, a front left / right air distribution ratio adjusting door 148 for adjusting the air distribution ratio of the left and right fronts (driver seat and front passenger seat) is provided. The front left / right air distribution ratio adjusting door actuator 149 is driven and controlled. When the front left / right air distribution ratio adjusting door 148 is rotated from the neutral position to the right seat side, for example, the amount of air flowing down to the left seat side increases and the amount of air flowing down to the right seat side is that much. Decrease. Thereby, the air-conditioning capacity of the left and right seats on the front seat side changes.
[0037]
Similar to the front duct 147f, a rear left / right air distribution ratio adjustment door 150 for adjusting the air distribution ratio of the left and right seats in the rear seat is provided in the rear duct 147r, and is driven by a rear left / right air distribution ratio adjustment door actuator 151. Be controlled. When the rear left / right air distribution ratio adjusting door 150 is rotated from the neutral position to the right seat side, for example, the amount of air flowing down to the left seat side increases and the amount of air flowing down to the right seat side is that much. Decrease. Thereby, the air-conditioning capability of the left and right seats on the rear seat side changes.
[0038]
Intake door actuator 116, fan control amplifier 117, front air mix door actuator 134f, rear air mix door actuator 134r, front mode actuator 140, front / rear air distribution ratio adjusting door actuator 142, rear mode door actuator 146, front left / right air distribution Command signals for the ratio adjusting door actuator 149 and the rear left / right air flow ratio adjusting door actuator 151 are respectively sent from the control device 30.
[0039]
The control device 30 controls each actuator described above and performs a reference value determination process for the gas sensor 2. Then, after the reference value setting process, the control device 30 performs auto intake control based on the sensor signal from the gas sensor 2 and the determined reference value.
[0040]
[Reference Value Determination Processing by Control Device 30]
FIG. 4 shows a flowchart of the processing procedure of the reference value setting process by the control device 30. Here, the control device 30 stores the previously acquired gas sensor resistance value GRs as clean air resistance value memory data GR0M in a memory (not shown).
[0041]
In step S1, the control device 30 determines whether or not a predetermined period T1 has elapsed since the ignition switch was operated from OFF to ON. When it is determined that the predetermined period T1 has elapsed, the control device 30 proceeds to step S2, and when it is determined that the predetermined period T1 has not elapsed, the control apparatus 30 proceeds to step S3.
[0042]
The predetermined period T1 is a period from when the sensor unit operates stably until the sensor signal is stabilized. During this period, the vehicle air conditioner 20 does not perform a process of suppressing exhaust gas. Further, the control device 30 sets the semi-inside air mode in which the outside air and the inside air are taken into the vehicle air conditioner 20 at the same ratio or a predetermined ratio (for example, outside air: inside air = 6: 4) within the predetermined period T1.
[0043]
In step S3, the control device 30 inputs the sensor signal from the gas sensor 2, sets the gas sensor resistance calculation value GRs to the clean air resistance value memory data GR0M (GRs = GR0M), and advances the process to step S14 described later.
[0044]
On the other hand, in step S2, the control device 30 inputs a sensor signal from the gas sensor 2,
GRs = (GGAD × GRL) / (255−GGAD)
GGAD: Gas sensor for gasoline A / D value (bit)
GRL: Gas sensor LOAD resistance value for gasoline (for example, 10 kΩ)
The A / D value from the gas sensor 2 is converted as the current gas sensor resistance value GRs using the expression expressed as follows, and the process proceeds to step S4.
[0045]
In step S4, the control device 30 determines whether or not the sensor signal read in the above step is the first time. If it is the first time, the process proceeds to step S5. If not, the process proceeds to step S6. When the sensor signal read this time is not the first time, the gas sensor resistance value read last time or before is set to the gas sensor resistance initial value GR0M0, and the processes after step S6 are performed.
[0046]
In step S5, since the control device 30 has used the gas sensor 2 for the first time this time, the gas sensor resistance initial value GR0M0 is set to a predetermined value (for example, 6 kΩ), and the process proceeds to step S6.
[0047]
In step S6, the control device 30 compares the gas sensor resistance value GRs calculated in step S2 with the gas sensor resistance initial value GR0M0 determined in step S5 or previously and stored in a memory (not shown). When it is determined that GRs is greater than the gas sensor resistance initial value GR0M0 (clean), the process proceeds to step S7. When it is determined that GRs is not greater, the process proceeds to step S8.
[0048]
In step S7, control device 30 starts counting of clean air determination timer GGCAT and advances the process to step S9. On the other hand, in step S8, the clean air determination timer GGCAT is cleared, and the process proceeds to step S14.
[0049]
In step S9, the control device 30 determines whether or not the clean air determination timer GGCAT has passed the predetermined time T2, and proceeds to step S10 when determining that the predetermined time T2 has elapsed, and determines that it has not elapsed. If so, the process proceeds to step S14.
[0050]
In step S10, control device 30 clears the value of clean air determination timer GGCAT, and proceeds to step S11.
[0051]
In step S11, the control device 30 compares the current gas sensor resistance value GRs obtained in the above-described step with the preset clean air limit resistance value GR0L, which is a lower limit value recognized as clean air, to determine the gas sensor resistance value. When it is determined that GRs is greater than the clean air limit resistance value GR0L (clean), the process proceeds to step S12. When it is determined that GRs is not greater, the process proceeds to step S13. That is, when the outside air is clean, the process proceeds to step S12, and when the outside air is dirty, the process proceeds to step S13.
[0052]
In step S12, the control device 30 sets the detected gas sensor resistance value GRs to the clean air limit resistance value GR0L (GRs = GR0L), and proceeds to step S13.
[0053]
In step S13, the control device 30 sets the obtained gas sensor resistance value GRs to the gas sensor resistance initial value GR0M0 (GR0M0 = GRs), and proceeds to step S14.
[0054]
In step S14, the control device 30 determines whether or not a predetermined period T3 has elapsed since the ignition switch was operated from OFF to ON. Here, the predetermined period T3 is a period provided for updating the initial value when the air concentration around the vehicle is stabilized. When it is determined that the predetermined period T3 has elapsed, the control device 30 proceeds to step S17, and when it is determined that the predetermined period T3 has elapsed, the control device 30 proceeds to step S15 and determines that the predetermined period T3 has not elapsed. If so, the process proceeds to step S16.
[0055]
In step S17, control device 30 updates gas sensor resistance initial value GR0M0 to clean air resistance value memory data GR0M, and proceeds to step S21.
[0056]
In step S16, control device 30 determines whether or not previous clean air resistance value memory data GR0M is smaller than gas sensor resistance initial value GR0M0. When it is determined that the control device 30 is small, the control device 30 proceeds to step S20. When it is determined that the control device 30 is not small, the control device 30 proceeds to step S21. In step S20, control device 30 updates gas sensor resistance initial value GR0M0 to clean air resistance value memory data GR0M, and proceeds to step S21.
[0057]
By performing the processing of step S16 and step S20, the control device 30 updates the gas sensor resistance initial value GR0M0 until the predetermined period T1 elapses and the predetermined time T3 is reached. That is, if the previously acquired gas sensor resistance value does not exceed the current gas sensor resistance value GRs, auto intake control is performed using the previously acquired gas sensor resistance value, and if it exceeds, the latest gas sensor resistance value of this time Auto intake control is performed using GRs.
[0058]
  In step S15, control device 30 determines whether or not clean air resistance value memory data GR0M is smaller than gas sensor resistance initial value GR0M0.
The control device 30 is smallNotIf it is determined that the process proceeds to step S17,NoIf it is determined, the process proceeds to step S18.
[0059]
In step S18, the control device 30 adds the current clean air resistance value memory data GR0M to the gas sensor resistance initial value GR0M0 to halve the value. That is, the control device 30
GR0M = [{GR0M (previous value) + GR0M0 (current initial value)} / 2]
The current clean air resistance value memory data GR0M is calculated using the calculation formula expressed as follows, and the process proceeds to step S19. That is, the control device 30 determines the average value of the current gas sensor resistance value GRs and the average value of the previously acquired gas sensor resistance value or the previously acquired gas sensor resistance value and the current gas sensor resistance value GRs. The clean air resistance value memory data GR0M, which becomes the reference value of
[0060]
In step S19, the control device 30 sets the gas sensor resistance initial value GR0M0, which is the reference value for the current auto intake control, as the clean air resistance value memory data GR0M obtained in step S18, and proceeds to step S21.
[0061]
In step S21, the control device 30 calculates the resistance ratio with respect to the gas sensor resistance value GRs using the clean air resistance value memory data GR0M of the cleanest air as a reference value (GR0M) as a reference, and calculates the gasoline differential calculation value GGC. Ask for. At this time, the control device 30
GGC = (GRs / GR0M) × 255
Use the expression expressed by.
[0062]
When the vehicle is traveling, the control device 30 determines that the outside air is clean and enters the outside air mode when the gas sensor resistance value GRs larger than the gas sensor resistance initial value GR0M0 updated in step S21 is input. When the gas sensor resistance value GRs smaller than the gas sensor resistance initial value GR0M0 is input, the vehicle air conditioner 20 is controlled to perform auto intake control in which it is determined that the outside air is dirty and the inside air mode is set.
[0063]
According to the control device 30 that performs such processing, before the predetermined time T3, as described in step S16 and step S20, the current gas sensor resistance initial value GR0M0 is the previous clean air resistance value memory data GR0M. If it is larger and clean, control is performed based on the current gas sensor resistance initial value GR0M0, so that the entry of dirty air into the vehicle compartment is prevented without using dirty air as a reference.
[0064]
Further, in this control device 30, immediately after the predetermined period T3, the current gas sensor resistance initial value GR0M0 is smaller than the previous clean air resistance value memory data GR0M, and when it is dirty, the previous clean air resistance value memory data GR0M and the current gas sensor Since the average value of the initial resistance value GR0M0 is set to the initial gas sensor resistance value GR0M0, even when the vehicle starts to travel from an area where the outside air is dirty, it prevents the outside of the vehicle from entering the vehicle interior and causing the vehicle interior to become odorous. can do.
[0065]
According to such a vehicle air conditioner 20, since the initial value of this time is determined after the predetermined period T3, a period during which the gas sensor 2 is stable is ensured, and variations in sensor signals generated by the sensor unit are avoided. In the vehicle air conditioner 20, the sensor signal at the time of clean air is used as a reference value, and the ratio with the current sensor value is calculated as the gas concentration. Therefore, according to the vehicle air conditioner 20, it is possible to predict that the outside air will become dirty in the future due to the past gas concentration state and the interior of the vehicle will become odor, and to reliably suppress the odor in the vehicle interior.
[0066]
Further, in the control device 30 according to the present embodiment, when performing the auto intake control, the control described below may be performed.
[0067]
The control device 30 may control the intake door actuator 116 so as to change the drive speed of the intake door 113 based on the degree of contamination of outside air when the vehicle is traveling. That is, when driving the intake door actuator 116, the control device 30 changes a coefficient for adjusting the drive speed of the intake door actuator 116 according to the magnitude of the sensor signal from the gas sensor 2. The control device 30 drives the intake door 113 slowly when the outside air is clean, and controls the intake door actuator 116 so as to drive the intake door 113 quickly when the outside air is dirty, so that the dirty outside air enters the vehicle interior. Many intrusions can be suppressed.
[0068]
In addition, the control device 30 may perform auto intake control by changing a coefficient for calculating a sensor signal according to the vehicle speed. That is, the control device 30 changes the coefficient when determining the degree of dirtiness of the outside air based on the gas sensor resistance value. This makes it easy to detect that the degree of contamination is large even when the vehicle speed is low, for example. Specifically, the control device 30 normally air-conditions only with outside air when the current gas sensor resistance value GRs is equal to or lower than a predetermined value (Ω) and becomes a predetermined vehicle speed or higher (for example, 60 km / h), When the vehicle speed is equal to or lower than a predetermined vehicle speed (for example, 50 km / h), the intake door actuator 116 is controlled so as to air-condition using a predetermined ratio of the inside air. Then, when the current gas sensor resistance value GRs is equal to or greater than a predetermined value (Ω), the control device 30 performs air conditioning only with outside air when the current gas sensor resistance value GRs is equal to or higher than a predetermined vehicle speed (for example, 60 km / h), and is equal to or lower than the predetermined vehicle speed ( For example, when the air pressure is 50 km / h or less, the intake door actuator 116 is controlled so as to perform air conditioning using a larger amount of the inside air than the above-mentioned predetermined ratio.
[0069]
Further, the control device 30 may determine whether or not to perform the auto intake control having the semi-inside air mode based on the temperature of the outside air and the vehicle speed in order to prevent the vehicle user from cooling down the knees. As a result, the control device 30 can perform the semi-inside air mode when the outside air temperature is high or when the outside air temperature is low and the vehicle speed is low, and can eliminate the semi-inside air mode under other conditions.
[0070]
Furthermore, the control device 30 controls the intake door actuator 116 so as to automatically take in the outside air every predetermined period when the compressor is turned off in order to prevent the vehicle from being clouded. The initial value may be updated when the ambient air concentration is stabilized.
[0071]
Furthermore, the control device 30 may determine whether or not to perform auto intake control according to the ratio of using the outside air by changing the ratio of using the outside air based on the target blowing temperature.
[0072]
The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.
[0073]
In the above example, an example in which the reference value is determined by averaging the previous gas sensor resistance value and the current gas sensor resistance value has been described, but the previous gas sensor resistance value, the previous gas sensor resistance value, and The reference value may be determined by adding the current gas sensor resistance value and dividing by three. In this way, since multiple previously acquired gas sensor resistance values are used, even if the current vehicle travel start area is dirty, it is possible to further suppress the intake of dirty air into the vehicle interior without determining the reference value with dirty outside air And can be air-conditioned.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration including a vehicle air conditioner to which the present invention is applied.
FIG. 2 is a configuration diagram of a vehicle air conditioner to which the present invention is applied.
FIG. 3 is a configuration diagram of a main part of a vehicle air conditioner to which the present invention is applied.
FIG. 4 shows a flowchart of a processing procedure of reference value setting processing by the control device.
[Explanation of symbols]
1 Own vehicle
2 Gas sensor
20 Vehicle air conditioner
30 Control device
111 Outside air intake
112 Inside air intake
113 Intake door
116 Intake door actuator

Claims (3)

In an air conditioning control device that switches between an inside air mode and an outside air mode in accordance with a sensor signal from a gas sensor that detects the degree of contamination of outside air outside the vehicle,
Storage means for storing a first sensor value indicating the degree of contamination of outside air previously acquired by the gas sensor;
Input means for inputting a second sensor value currently detected by the gas sensor;
Arithmetic means for obtaining a reference value based on the first sensor value stored in the storage means and the second sensor value input by the input means;
An air conditioning control means for comparing the reference value acquired by the calculation means and the second sensor value and performing control to switch between the inside air mode and the outside air mode;
The air-conditioning control means is based on the second sensor value and the first sensor value before a predetermined period of time, and when the current outside air is dirty than the previous outside air, the inside air mode and the outside air are based on the first sensor value. Control to switch between modes ,
If the current outside air is not contaminated than the previous outside air, control is performed to switch between the inside air mode and the outside air mode based on the second sensor value,
An air conditioning control device that performs control to switch between an inside air mode and an outside air mode using the reference value acquired by the calculating means after the predetermined period has elapsed. Wherein the predetermined period is claim 1 in which the ignition switch of the vehicle from the turned on, air concentration around the vehicle, wherein the period der Rukoto provided for the update of the reference value when the stabilized The air conditioning control device described in 1. If the current outside air is less dirty than the previous outside air based on the second sensor value and the first sensor value immediately after the predetermined time , the calculating means, the first sensor value stored in the storage means, The air conditioning control device according to claim 1 or 2, wherein a reference value is obtained by calculating an average value of the second sensor value input by the input means.

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