JP5125984B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner including a blower motor that operates using power generated by a solar battery and power from a vehicle-mounted battery.

Conventionally, an apparatus described in Patent Document 1 is known as this type of vehicle air conditioner. The vehicle air conditioner described in Patent Document 1 takes out electric power from the in-vehicle battery when the ignition switch (IG switch) is in the ON state, performs normal air conditioning control, and is when the IG switch is in the OFF state. When the power generation amount of the solar cell is greater than or equal to a predetermined amount, the ventilation control is performed by taking out the electric power from the solar cell.
JP 2006-168526 A

  However, according to the prior art of Patent Document 1, when the IG switch is in the OFF state, for example, the ventilation control during parking is performed regardless of the air quality outside the passenger compartment. In some cases, it was taken in. This can occur when the parked vehicle is in an exhaust gas environment. Specifically, this is a case where exhaust gas is released from surrounding vehicles or the like during parking and the air around the vehicles is contaminated. In such a case, although ventilation is performed, exhaust gas is taken into the vehicle compartment and becomes contaminated, which gives the passenger discomfort due to odor or the like.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle air conditioner that can prevent air contaminated during ventilation during parking or the like from being taken into the passenger compartment. .

  In order to achieve the above object, the following technical means can be employed. In addition, the code | symbol in the parenthesis as described in a claim and each means of the following shows the correspondence with the specific means as described in embodiment mentioned later as one aspect.

The invention described in claim 1 performs air conditioning in the passenger compartment and operates the blower motor (8) using the electric power supplied from the solar cell (5) when the ignition switch (2) is in the off state. The invention relates to a vehicle air conditioner that takes outside air into the vehicle interior and performs ventilation,
An outside air pollution degree detecting means (10) for detecting the degree of outside air pollution outside the passenger compartment, an outside air pollution degree judging means (436) for judging the degree of outside air pollution using the detection value of the outside air pollution degree detecting means, and outside air pollution Control means (43) for controlling the ventilation air volume in the passenger compartment based on the determination result of the degree of contamination of the outside air by the degree determination means,
The control means reduces the ventilation air volume in the passenger compartment when the outside air pollution degree judging means determines that the outside air is contaminated during the ventilation of the passenger compartment when the ignition switch is off .

  According to this invention, the air quality state of the outside air is detected by the outside air pollution degree determination means during the ventilation of the vehicle interior, and when the contamination is confirmed, the ventilation is compared with the case where the contamination of the outside air is not confirmed. Reduce air flow. Thereby, since the amount of outside air taken into the vehicle interior is reduced or zero, it is possible to prevent the occupant from coming into contact with highly contaminated air. Therefore, it is possible to prevent the occupant from being given an unpleasant feeling such as odor even though ventilation for air purification is performed. For example, when ventilation is performed during parking or the like when the ignition switch is off, it is possible to prevent exhaust gas emitted from a vehicle around the parked vehicle from being taken into the vehicle compartment together with ventilation.

  According to a second aspect of the present invention, in the first aspect of the present invention, when the control means determines that the outside air is contaminated by the outside air pollution degree determination means during the ventilation of the vehicle interior, It is characterized by switching to the inside air circulation mode for circulating air and stopping the intake of outside air into the vehicle interior.

  According to this invention, as means for reducing the ventilation air volume according to claim 1, the outside air introduction mode during ventilation is switched to the inside air circulation mode. Thereby, since the external air introduction rate into the vehicle interior at the time of parking is reduced, the occupant can be prevented from coming into contact with air having a high degree of contamination, as in the first aspect.

  According to a third aspect of the present invention, in the second aspect of the present invention, when the control means determines that the outside air is contaminated by the outside air pollution degree determining means during the ventilation of the passenger compartment, the ignition is further performed. When the number of switching between the inside air circulation mode and the outside air introduction mode after the switch is turned off is less than a predetermined number, the mode is switched to the inside air circulation mode.

  According to the present invention, the ventilation stop processing from the ventilation state such as parking is performed based on the number of times of operating the inside / outside air switching means (the number of times of switching) after the ignition switch is turned off, in addition to the determination of the degree of contamination of the outside air. As a result, the condition for switching to the ventilation stop is limited. Thereby, the switching frequency from the ventilation state to the inside air circulation mode can be reduced. Therefore, the power consumption of the in-vehicle battery when the vehicle engine is stopped can be suppressed.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly show that combinations are possible in each embodiment, but also a combination of the embodiments even if they are not clearly shown unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, a vehicle air conditioner according to a first embodiment which is an example of the present invention will be described. The motor control device of the present embodiment has been described as an example when applied to a vehicle ventilation control device and a vehicle air conditioning control device. For example, an air circulation device in a luggage compartment that is affected by solar radiation when parking, The present invention can also be applied to motor control that uses a solar cell as a power source for other purposes, such as a fan in an on-vehicle cold storage.

  FIG. 1 is a block diagram showing the overall configuration of a vehicle air conditioner. FIG. 2 is a schematic diagram showing the arrangement of the air conditioning unit 300 of the vehicle air conditioner in the vehicle. FIG. 3 is a schematic diagram for explaining the configuration of the air conditioning unit 300 and the sterilization apparatus 9. The vehicle air conditioner includes a ventilation control unit 4 as a vehicle ventilation control device in addition to the air conditioning control unit 3 as an air conditioning control device. In FIG. 1, there are an input line L1 directly connected to the in-vehicle battery 1 and an input line L2 connected from the in-vehicle battery 1 via an ignition switch (hereinafter referred to as IG switch) 2 to control the operation of the vehicle air conditioner. Both input lines L1 and L2 are connected to the air conditioning control unit 3. The IG switch 2 is a switch that is operated to the ON position when the vehicle is traveling and is operated to the OFF position when the vehicle is not parked and traveled, and can also be called a power switch of the vehicle. On the other hand, the ventilation control unit 4 that controls the ventilation of the passenger compartment at the time of parking is only connected to the input line L3 of the solar cell 5 as a power source, and the ON / OFF information of the IG switch 2 is sent from the signal line L2. I have it. The ventilation control unit 4 is connected to a ventilation instruction switch 6 that generates a ventilation instruction signal that is turned on and off by a user operation.

  The power switch 7 is a switch that can switch between the in-vehicle battery 1 and the solar battery 5 as a power source for supplying power to the blower motor 8. The power switch 7 is a switching unit that selectively switches between the in-vehicle battery 1 and the solar battery 5. The power switch 7 is configured by a relay. Power is supplied to the relay coil 71 of the power switch 7 from the IG switch 2 through the signal line L2. The relay coil 71 is grounded via the switch SW7. The switch SW7 is controlled by the air conditioning control means 31. Accordingly, energization of the relay coil 71 is controlled by the IG switch 2 and the switch SW7.

  When the IG switch 2 is on and the air conditioning control means 31 is turning on the switch SW7, the relay coil 71 is turned on, and the relay switch 72 is turned on to the in-vehicle battery 1 side. When the IG switch 2 is ON and the air conditioning control means 31 is turning off the switch SW7, the relay coil 71 is turned off and the relay switch 72 is turned on to the solar cell 5 side. Therefore, when the IG switch 2 is ON, either the in-vehicle battery 1 or the solar battery 5 selectively supplies power to the blower motor 8. Furthermore, when the IG switch 2 is OFF, the relay coil 71 is OFF regardless of the state of the switch SW7, and the relay switch 72 is inserted into the solar cell 5 side. Therefore, only the solar cell 5 supplies power to the blower motor 8 when the IG switch 2 is OFF.

  The sterilization apparatus 9 for sterilizing the passenger compartment is connected to the signal line L2 or the signal line L3. When the IG switch 2 is OFF, the sterilization apparatus 9 is connected to the signal line L3 via the switch SW1. Is configured to receive a solar cell voltage (solar voltage) as an output.

  The air conditioning control unit 3 includes air conditioning control means 31 comprising a microcomputer and peripheral circuits, and switches SW4 and SW5. The first motor control signal from the air conditioning control means 31 via the switch SW4, and ventilation control means. 43 is configured to take a wired OR at a junction 32 with the second motor control signal via the switch SW2. Further, a wired OR is taken at a junction 33 between the first sterilization control signal from the air conditioning control means 31 via the switch SW5 and the second sterilization control signal from the ventilation control means 43 via the switch SW3. It is configured. The air conditioning control unit 3 controls the operation of the sterilization apparatus 9 disposed in the air conditioning unit 300 and the air conditioning case 313 of the vehicle air conditioner as shown in FIGS. The switches SW2 to SW5 are NPN transistors, for example, and are configured to turn on and output an L level signal when receiving an H level control signal. The air conditioning control means 31 has a storage means 34 such as a ROM for storing a predetermined control program.

  As shown in FIGS. 2 and 3, the air conditioning unit 300 includes an instrument panel (not shown) disposed in the front part of the passenger compartment, a defroster outlet 301 leading to the inner surface of the window, an occupant's A face air outlet 302 directed to the upper body and a foot air outlet 303 directed to the feet of the occupant are provided, and a desired air blowing mode is realized by electrically opening and closing the doors 304, 305, and 306. An outside air introduction port 307 and an inside air introduction port 308 are provided on the upstream side of the blower motor 8 constituting the blower fan, and the inside / outside air switching door 309 is electrically switched and driven to introduce inside air or outside air into the vehicle interior. Realize the mode. The evaporator 310, the heater core 311 and the air mix door 312 are members that realize conditioned air at a desired temperature, and the conditioned air is blown out from the respective outlets 301 to 303 on the downstream side. The sterilization apparatus 9 is installed in the air conditioning case 313, and supplies sterilization ions into the passenger compartment on the conditioned air. The sterilization apparatus 9 may be disposed in an air purifier (not shown) in the air conditioning case 313 or may be installed alone in the passenger compartment.

  In the present embodiment, immediately after the IG switch 2 is turned off, the air conditioning control unit 3 opens and closes the doors 304, 305, 306, 309, and 312 to preset the ventilation mode during parking. . For example, the defroster air outlet 301 and the face air outlet 302 are opened, the outside air inlet 307 side is opened, the air mix door 312 is rotated in the direction of closing the passage on the heater core 311 side with a small air resistance, and the air resistance is reduced as a whole. The outside air can be introduced into the passenger compartment in a small state, so that the passenger compartment can be cooled and sterilized.

  The ventilation control unit 4 receives the solar cell voltage detecting means 41 connected to the signal line L3 and smoothing out the fluctuation of the solar voltage Vsun, which is the output of the solar cell 5, and the solar voltage Vsun of the solar cell 5, For example, a stabilized power supply circuit 42 that generates a constant voltage of 5 V and supplies power to the ventilation control means 43, a ventilation control means 43 including a microcomputer and peripheral circuits, switches SW1, SW2, and SW3, a backflow prevention diode 44, 45, 46.

  The ventilation control means 43 is a function realizing means by a microcomputer, a voltage determination means 431 for determining the magnitude relationship between the solar voltage Vsun and a predetermined voltage value, and an IG for determining the state of the IG switch 2, that is, ON or OFF. The switch state determination means 432, the motor control means 434 for controlling the operation of the blower motor 8 when the IG switch 2 is OFF (when the vehicle is not used), and the power supply from the solar cell 5 to the sterilization apparatus 9 are instructed. The sterilization control means 435 for controlling the operation of the sterilization apparatus 9 during parking and the detection information of the exhaust gas sensor 10 which is an example of the outside air pollution degree detection means are inputted and the outside air pollution degree judgment means 436 for judging the degree of pollution of the outside air. And having. In addition, the circuit configuration unit includes a first storage unit 433 such as a RAM, a register memory, and a rewritable nonvolatile memory. The exhaust gas sensor 10 is a detection means for detecting the degree of pollution outside the passenger compartment from the concentration of harmful gas such as carbon monoxide in the air, and outputs a voltage signal corresponding to the detected value to the ventilation control means 43.

  The solar cell 5 comprises a plurality of solar cells connected in series, and a plurality of series-connected series cells connected in parallel constitutes a solar cell module that generates a desired voltage and current, and is provided on the ceiling of the vehicle. Installed in the sunroof (see FIG. 2).

  The blower motor 8 is also used as a blower motor of a vehicle air conditioner. Here, a three-phase brushless motor 81 capable of current control is used, and the pulse width given to the brushless motor 81 is variable according to an external duty signal. It has a motor drive circuit 82 to be controlled. Further, instead of the brushless motor 81, a normal DC motor with a control circuit may be used.

  The sterilization apparatus 9 includes a plasma unit 91 that generates sterilization ions, receives an output instruction from the sterilization control means 435, turns on the switch SW1, supplies power to the solar voltage Vsun, and further, the sterilization control means 435 or When the operation instruction signal from the air conditioning control means 31 is received, the switch SW6 is turned on to drive the plasma unit 91. Further, as the sterilization apparatus 9, a negative ion generator or an ozone generator may be used instead of the plasma unit 91.

  In this embodiment, the electric power generated by the solar cell 5 is consumed almost completely by the blower motor 8, and a motor power control method is employed to increase ventilation efficiency.

  FIG. 4 shows the voltage-current characteristics of the solar cell 5, and it can be seen that the generated power Pmax changes according to the amount of solar radiation. On the other hand, when the motor speed is controlled by changing the duty ratio Dx of the brushless motor 81 as the blower motor 8 with the configuration shown in FIG. 5A as in this embodiment, the solar as shown in FIG. 5B. The required operating power P is determined according to the voltage Vsun and the duty ratio Dx. In particular, the duty ratio Dx (that is, current) has a greater influence than the solar voltage Vsun, and the required operating power P can be secured by changing the duty ratio Dx and controlling the rotational speed of the brushless motor 81 even if the solar voltage Vsun varies. I understand. Therefore, when the solar voltage Vsun is low, the required operating power P can be ensured by increasing the duty ratio Dx and increasing the current.

  Therefore, as shown in FIG. 6, in order to consume the electric power generated by the solar cell 5 almost completely by the brushless motor 81, the generated electric power Pmax of the voltage-current characteristic that changes according to the amount of solar radiation substantially matches. Alternatively, it is understood that it is sufficient to select the duty ratio Dx as the necessary operating power that can be made closer to control the brushless motor 81. In other words, the duty ratio Dx is set according to the solar voltage Vsun, and the motor operation is stabilized at a balance point between the motor current determined by the duty ratio Dx and the solar voltage Vsun, but the stable point is determined by the amount of solar radiation. This is made possible by selecting and controlling the duty ratio Dx (that is, the output characteristic amount) so as to substantially match the generated power Pmax on the voltage-current characteristic of 5. In this example, the duty ratio Dx (that is, the characteristic amount of the output current) is set according to the solar voltage Vsun. However, as the output characteristic amount of the brushless motor 81, in addition to the output current, the motor speed and the motor voltage are set. Alternatively, a fan air volume driven by the brushless motor 81 can be applied.

  Next, the general operation of the vehicle air conditioner will be described with reference to the drawings. FIG. 7 is a flowchart showing an outline of control in the ventilation control means 43. FIG. 8 is a flowchart showing an outline of control in the air conditioning control means 31. The ventilation control means 43 controls the blower motor 8 when the IG switch 2 is OFF. Further, the ventilation control means 43 controls the electric power supplied to the blower motor 8. The air conditioning control means 31 controls the blower motor 8 when the IG switch 2 is ON. Further, the air conditioning control means 31 selects a power supply for supplying power to the blower motor 8 and controls the power supplied to the blower motor 8.

  In FIG. 7, when the IG switch 2 is OFF (that is, during parking), the ventilation control means 43 operates when there is solar radiation around the vehicle and the output of the solar battery 5 is sufficient. At that time, as shown in FIG. 7, the ventilation control means 43 periodically inputs the solar voltage Vsun and the information of the ventilation instruction switch 6 (step 1000), and the ventilation control processing, that is, the control processing of the blower motor 8 (step 2000). ) And sterilization control processing, that is, control processing of the plasma unit 91 (step 3000) are sequentially performed. On the other hand, when the output of the solar cell 5 is not sufficient, the ventilation control means 43 is stopped, and the processes 1000 to 3000 are not performed.

  In FIG. 8, the air conditioning control means 31 is always supplied with power from the in-vehicle battery 1, and thus operates according to ON / OFF of the IG switch 2. When the IG switch 2 is turned off, particularly immediately after turning it on, the doors 304, 305, 306, 309, and 312 of the air conditioning unit 300 shown in FIGS. The ventilation mode at the time of parking is set in advance (steps 4001, 4002, 4003).

  When the IG switch 2 is ON, normal air conditioning control is performed. For example, various signals such as the inside air temperature, the outside air temperature, and the amount of solar radiation are input from each sensor (not shown) (step 4004), the necessary blowing temperature is calculated (step 4005), and the blower control amount is determined (step). 4006), inside / outside air switching processing (step 4007), determination of the outlet mode (step 4008), and calculation of the air mix door opening (step 4009), the blower motor 8 and each of the doors 304, 305, 306, 309 are performed. , 312 is controlled. Subsequently, sterilization control processing during vehicle operation is performed (step 4010), and the operation of the sterilization apparatus 9 is controlled. Step 4006 provides a control process for the blower motor 8 when the IG switch 2 is ON.

  Next, details of the ventilation control process (step 2000) performed by the ventilation control means 43 will be described with reference to FIG. FIG. 9 is a flowchart showing the flow of the ventilation control process (step 2000). First, the ventilation control means 43 determines whether or not the IG switch 2 is in the OFF state by the IG switch state determination means 432 (step 2001). If it is determined that the IG switch 2 is in the ON state, ventilation is not performed and the ventilation control process is terminated.

  If it is determined that the IG switch 2 is in the OFF state, it is determined in step 2002 whether or not the blower motor 8 is operating during ventilation (for example, a state where ventilation is performed during parking). If it is determined NO in step 2002, ventilation is not performed, and the ventilation control process ends. If YES is determined in step 2002, it is determined in step 2003 whether or not the outside air is contaminated. The determination in step 2003 is performed by the outside air contamination degree determination means 436, and the value of the output voltage detected by the exhaust gas sensor 10 is compared with a predetermined reference value (contamination degree determination level) to determine the degree of contamination outside the passenger compartment. Is determined.

  If the outside air pollution degree determining means 436 determines that the outside air is not polluted, the current ventilation is maintained and the ventilation is continued, and this ventilation control process is terminated. On the other hand, if it is determined that the outside air is contaminated, in step 2004, the motor control means 434 reduces or stops the output of the blower motor 8 so as to reduce or reduce the ventilation air volume, or communicates with the air conditioning control means 31. Then, the inside / outside air switching door 309 is switched and driven so as to be in the inside air circulation mode. And this ventilation control process is complete | finished. As a result, the ventilation is reduced or stopped, or the inside air circulates in the vehicle interior, and the amount of outside air introduced into the vehicle interior is reduced or the ventilation is stopped. Therefore, exhaust gas discharged from surrounding vehicles or the like is not taken into the passenger compartment during parking, and it is possible to prevent the occupant from being given odor or harmful gas.

  Next, the sterilization control process performed by the sterilization control means 435 will be described with reference to FIGS. FIG. 10 is a flowchart showing the overall flow of the sterilization control process, FIG. 11 is a table showing the specifications of the sterilization control process for better understanding of FIG. 10, and both figures represent substantially the same contents. .

  First, when the IG switch 2 is OFF, the ventilation instruction switch 6 is ON, the motor drive DUTY output is ON, and the determination value F1 (SB) = 1 of the solar voltage Vsun is satisfied, the routine proceeds to step 3005 (steps 3001 to 3004). Subsequently, the switch SW1 is turned on (signal S2), and the solar cell 5 is used as a power source to supply the solar voltage Vsun to the sterilizer 9 (step 3005). Subsequently, the switch SW6 is turned ON (signal S1) within the power supply period of the solar cell 5 to drive the plasma unit 91 (step 3006).

  Further, as shown in FIG. 12, the driving timing S1 of the sterilization apparatus 9 is set with the power feeding timing S2 with margin times TA and TB before and after that, and the driving timing S1 overlaps within the power feeding period S2. The sterilization apparatus 9 can be quickly activated during driving. On the other hand, if any of Steps 3001 to 3004 is NO, the process proceeds to Step 3007 and the operation of the sterilization apparatus 9 is stopped. Here, in step 3004 shown in FIG. 10, it is determined whether or not the determination value F1 (SB) of the solar voltage Vsun = 1, but actually, in another routine such as timer interruption processing, the solar voltage is periodically It is determined whether Vsun is within a predetermined range, and the determination result is stored in the first storage unit 433. In step 3004, the determination result is read from the first storage unit 433, and it is confirmed and determined whether the solar voltage Vsun is within an allowable range with respect to the sterilization apparatus 9. The sterilization apparatus 9 is generally weak to a high voltage and needs to be suppressed within a voltage range determined for each sterilization apparatus 9.

  Below, the effect which the vehicle air conditioner of this embodiment brings is described. This vehicle air conditioner operates the blower motor 8 using the electric power supplied from the solar battery when the IG switch 2 is in the off state, takes the outside air into the vehicle compartment, and performs ventilation. The vehicle air conditioner includes an exhaust gas sensor 10 that detects the degree of contamination of outside air outside the passenger compartment, an outside air contamination degree determination unit 436 that determines the degree of contamination of outside air using a detection value of the exhaust gas sensor 10, and an outside air contamination degree determination unit. Ventilation control means 43 for controlling the ventilation air volume in the passenger compartment based on the determination result of the degree of pollution of outside air by 436. The ventilation control means 43 reduces the ventilation air volume in the passenger compartment when the outside air pollution degree judgment means 436 determines that the outside air is contaminated during the ventilation of the passenger compartment.

  According to this control, the air quality state of the outside air is detected by the outside air pollution degree determination means 436 during the ventilation of the vehicle interior, and the ventilation control considering the air quality can be performed. When the contamination of the outside air is confirmed, the control for reducing the ventilation air volume is performed as compared with the case where the contamination of the outside air is not confirmed. Thereby, since the amount of outside air taken into the vehicle interior is reduced or zero, it is possible to prevent the occupant from coming into contact with air with a high degree of contamination. Therefore, it is possible to prevent the passenger from having an unpleasant feeling such as an odor despite the ventilation for air purification. For example, when ventilation is performed during parking when the IG switch 2 is in an off state, it is possible to suppress the exhaust gas emitted by a car around the parked vehicle from being taken into the vehicle interior along with the ventilation. It is possible to avoid an unexpected discomfort of the occupant.

  In addition, the vehicle air conditioner switches to the inside air circulation mode for circulating the air in the vehicle interior when the outside air pollution degree determination means 436 determines that the outside air is contaminated during the ventilation of the vehicle interior. Stop taking in outside air.

  In this control, as a method of reducing the ventilation air volume, the outside air introduction mode during ventilation is switched to the inside air circulation mode. Thereby, the external air introduction | transduction rate to the vehicle interior at the time of parking can be reduced, and it can suppress that a passenger | crew contacts air with a high pollution degree. Further, by switching the suction port mode to the inside air circulation mode, the ventilation can be stopped without controlling the operation of the blower motor 8, and the control of the motor can be made unnecessary.

(Second Embodiment)
In the second embodiment, a modified example of the ventilation control process by the vehicle air conditioner of the first embodiment will be described with reference to FIG. FIG. 13 is a flowchart showing the flow of a ventilation control process according to the second embodiment. Steps denoted by the same reference numerals in FIG. 13 are the same as those in the flowchart shown in FIG.

  In the ventilation control process of the present embodiment, the ventilation control means 43 determines whether or not the IG switch 2 is in the OFF state by the IG switch state determination means 432 (step 2001), and if the IG switch 2 is in the ON state. If it is determined, the ventilation control process is terminated without performing ventilation.

  If it is determined in step 2001 that the IG switch 2 is in the OFF state, it is determined in step 2002 whether ventilation is in progress (for example, ventilation is being performed during parking) and whether the blower motor 8 is in operation. If this determination is NO, ventilation is not performed and the ventilation control process is terminated.

  If YES is determined in step 2002, it is determined in step 2003 whether or not the outside air is contaminated. If the outside air pollution degree determining means 436 determines that the outside air is not polluted, the current ventilation is maintained and the ventilation is continued, and this ventilation control process is terminated. On the other hand, if it is determined that the outside air is contaminated, the number of times of operation of the inside / outside air switching door 309 (that is, the number of times of switching) after the IG switch 2 is switched from ON to OFF is set to a predetermined number (for example, 20 times). ) Is determined (step 2005).

  The determination in step 2005 determines whether or not to switch to the inside air circulation mode in step 2006, which will be described later, depending on how many times the suction port mode has been switched from when the IG switch 2 is turned off and the parking state is entered. Is. Further, the number of times of switching after the IG switch 2 is turned on from off is stored in the storage unit 34 of the air conditioning control unit 31 and input to the ventilation control unit 43. Alternatively, the number of times of switching may be stored in the first storage unit 433 of the ventilation control unit 43.

  Further, the switching control of the inside / outside air switching door 309 performed after the IG switch 2 is turned on is turned off by comparing the output voltage value detected by the exhaust gas sensor 10 with the above-described pollution degree determination level value to determine the degree of pollution of the outside air. This is performed by determining and switching between the outside air introduction mode and the inside air circulation mode based on this outside air pollution degree.

  Switching control of the inside / outside air switching door 309 is performed as follows, for example. The pollution level determination level value to be compared with the output voltage value of the exhaust gas sensor 10 is changed to a value higher than the standard value during a predetermined inside air holding time (a predetermined time for holding the inside air circulation mode). The circulation mode is maintained, and after a predetermined inside air retention time has elapsed, the pollution level determination level value is set to the standard value for a predetermined ventilation permission time (a predetermined time during which the outside air introduction mode is permitted). Try to bring it back. Thereafter, the pollution level determination level value is decreased continuously or stepwise over time, and when the output voltage of the exhaust gas sensor 10 rises above the pollution level determination level value, the inside air circulation mode is switched to the outside air introduction mode. In this way, an increase in the concentration of carbon dioxide in the air in the passenger compartment due to keeping the inside air circulation mode for a long time is suppressed.

  If it is determined in step 2005 that the number of times of switching is greater than or equal to the predetermined number, the current ventilation is maintained and ventilation is continued, and the ventilation control process is terminated. On the other hand, if it is determined that the number of times of switching is less than the predetermined number of times, in step 2006, the current ventilation for taking in the outside air is stopped and controlled to the inside air circulation mode. And this ventilation control process is complete | finished. As a result, the inside air circulates in the passenger compartment, and the ventilation is stopped. Therefore, exhaust gas discharged from surrounding vehicles or the like is not taken into the passenger compartment during parking, and it is possible to prevent the occupant from being given odor or harmful gas.

  As described above, the ventilation stop processing from the ventilation state during parking or stopping in the vehicle air conditioner is performed by the degree of contamination of the outside air and the number of times of operation of the inside / outside air switching door 309 after the IG switch 2 is turned on (OFF). ) Is performed, the switching condition from the ventilation state to the inside air circulation mode is limited, so that the number of operations of the inside / outside air switching door 309 is reduced. Therefore, the power consumption of the vehicle-mounted battery 1 when the engine is stopped can be suppressed, and the charge capacity of the battery can be reduced.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, according to the above embodiment, in order to control the blower motor 8 and the sterilization apparatus 9 from both the ventilation control unit 4 and the air conditioning control unit 3, the control signal on the ventilation control unit 4 side is used in order to reduce the control output terminals. Although once taken into the air-conditioning control unit 3 side and wired OR, it is configured to output to the blower motor 8 and the sterilizer 9 separately from both units 3 and 4.

  Further, although the exhaust gas sensor 10 is employed as an outside air pollution degree detecting means for detecting the degree of outside air pollution, the concentration of carbon monoxide or the like can be determined as long as it is a detecting means capable of knowing the degree of outside air contamination present around the vehicle. It is not limited to the sensor to be detected.

1 is a block diagram showing an overall configuration of a vehicle ventilation control device and a vehicle air conditioner including a motor control device according to a first embodiment of the present invention. It is a schematic diagram which shows arrangement | positioning in the vehicle of the air conditioning unit 300 of a vehicle air conditioner. It is a schematic diagram for demonstrating the structure of the air conditioning unit 300 and the microbe elimination apparatus. 3 is a characteristic diagram showing voltage-current characteristics of a solar cell 5. FIG. (A) And (b) is a figure for demonstrating that the required operating electric power P of a brushless motor changes according to a duty ratio. It is a figure for demonstrating the electric power control method of a motor. 4 is a flowchart showing an outline of control in a ventilation control means 43. 3 is a flowchart showing an outline of control in an air conditioning control means 31. It is a flowchart which shows the flow of a ventilation control process. It is a flowchart which shows the whole flow of disinfection control processing. It is a table | surface which shows the control specification of the disinfection control process which supplements FIG. It is a time chart which shows the relationship between electric power feeding timing S2 and drive timing S1. It is a flowchart which shows the flow of the ventilation control process which concerns on 2nd Embodiment of this invention.

Explanation of symbols

2 ... Ignition switch 5 ... Solar cell 8 ... Blower motor 10 ... Exhaust gas sensor (outside air pollution degree detection means)
43. Ventilation control means (control means)
436 ... Means for determining outside air pollution

Claims (3)

Air conditioning in the passenger compartment and when the ignition switch (2) is off, the blower motor (8) is operated using the power supplied from the solar cell (5) to take outside air into the passenger compartment. A vehicle air conditioner for ventilation,
An outside air pollution degree detecting means (10) for detecting the outside air pollution degree outside the passenger compartment;
An outside air pollution degree judging means (436) for judging a degree of outside air pollution using a detection value of the outside air pollution degree detecting means;
Control means (43) for controlling the ventilation air volume in the vehicle interior based on the judgment result of the degree of pollution of the outside air by the outside air pollution degree judgment means;
With
The control means reduces the ventilation air volume in the passenger compartment when the outside air pollution degree judging means determines that the outside air is contaminated during ventilation of the passenger compartment when the ignition switch is off. A vehicle air conditioner characterized by the above.   The control means switches to the inside air circulation mode for circulating the air in the vehicle interior and returns to the vehicle interior when the outside air pollution degree judging means determines that the outside air is contaminated during the ventilation of the vehicle interior. 2. The vehicle air conditioner according to claim 1, wherein intake of outside air is stopped.   When it is determined that the outside air is contaminated by the outside air pollution degree determining means during ventilation in the vehicle interior, the control means further includes an inside air circulation mode after the ignition switch is turned off. The vehicle air conditioner according to claim 2, wherein when the number of times of switching to the outside air introduction mode is less than a predetermined number, the mode is switched to the inside air circulation mode.

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