JP3921994B2 - Vehicle air conditioner and program thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner that automatically controls an air conditioning state in a passenger compartment based on control characteristics and corrects the control characteristics based on an occupant instruction.
[0002]
[Prior art]
Conventionally, there exists a thing described in patent 2768177 as this kind of vehicle air conditioner. This conventional apparatus is provided with an operation switch for the passenger to set the air-conditioning state in the passenger compartment, and an occupant instruction by operating this operation switch is stored each time according to the number of passengers to correct (learn) the control characteristics. It has become.
[0003]
[Problems to be solved by the invention]
However, the control characteristics corrected based on the occupant instruction as described above tend to reflect the owner driver's preference, but if the owner driver's preference is learned, for example, at a very low airflow, Since the conditioned air is difficult to reach, there is a problem that when the occupant is in the rear seat, an operation for increasing the air volume is required in consideration of the warmth of the occupant in the rear seat each time.
[0004]
The present invention has been made in view of the above points, and an object of the present invention is to eliminate the inconvenience of changing the setting according to the riding situation and to ensure the comfort of the rear seat passenger.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the occupant sets the air-conditioning state in the passenger compartment, and automatically controls the air-conditioning state based on the control characteristics. The vehicle air conditioner includes a control means (31) that corrects the control characteristics based on the operation of the operation means (35 to 38), and includes a rear seat occupant detection means (44) that detects the presence or absence of a rear seat occupant. When the control means (31) determines that there is a rear seat occupant based on the output of the rear seat occupant detection means (44), the control means (31) increases the air-conditioning capacity to a predetermined value or more and increases the air volume ratio to the rear seat. It is characterized by that.
[0006]
According to this, when there are passengers in the rear seats, the cooling or heating capacity of the rear seats is automatically increased by increasing the air conditioning capacity and increasing the air volume ratio to the rear seats, so the setting changes according to the riding situation The comfort of the rear seat occupant can be ensured while eliminating the inconvenience.
[0007]
In the second aspect of the present invention, the air conditioner is provided with air blowing means (13), and the control means (31) increases the air blowing capacity of the air blowing air by the air blowing means (13), thereby determining the air conditioning capacity. It is characterized by being over the value.
[0008]
By the way, when the airflow is learned to be very low, the air-conditioning wind is difficult to reach the rear seats, and thus the cooling or heating capacity of the rear seats is insufficient. With the increase and the increase in the air volume ratio to the rear seat, the comfort of the rear seat occupant can be reliably ensured.
[0009]
In the invention described in claim 3, the air conditioner is provided at a portion for blowing out the conditioned air into the passenger compartment, and includes a wind direction adjusting means (21a) capable of adjusting the blowing direction of the conditioned air, and the control means (31) is provided with the wind direction adjusting means. By controlling (21a) and changing the blowing direction of the conditioned air, the air volume ratio to the rear seat is increased.
[0010]
By the way, if the air flow rate is simply increased, if the front seat occupant prefers a low air flow rate, the feeling of wind speed may deviate from the preferred range. However, in the invention according to claim 3, the direction of blowing the conditioned air is changed. Since the air volume ratio to the rear seat is increased, it is possible to suppress an increase in wind speed of the front seat passenger.
[0011]
According to the fourth aspect of the present invention, the occupant sets the air-conditioning state in the passenger compartment (35-38), and the air-conditioning state is automatically controlled based on the control characteristics. In a vehicle air conditioner comprising a control means (31) for correcting based on the operation of 35 to 38), a suction mode switching means (11) for switching between an inside air suction mode for introducing inside air and an outside air suction mode for introducing outside air; Rear seat occupant detection means (44) for detecting the presence or absence of a rear seat occupant, and the control means (31) selects the suction mode based on the control characteristics of the suction mode, and the rear seat occupant detection means (44). The control characteristics of the suction mode when it is determined that there is a rear seat occupant based on the output of the engine is a control characteristic that the outside air suction mode is more easily selected than when it is determined that there is no rear seat occupant. To.
[0012]
According to this, when there is a passenger in the rear seat, the outside air suction mode is easily selected, and in the outside air suction mode, the wind flow from the front to the rear of the passenger compartment is more easily formed than in the inside air suction mode. Even if the airflow is learned to be low, the conditioned air can easily reach the rear seat, so that the comfort of the rear seat occupant can be ensured.
[0013]
According to the fifth aspect of the present invention, the occupant sets the air-conditioning state in the passenger compartment (35-38), the air-conditioning state is automatically controlled based on the control characteristics, and the control characteristics are controlled by the operating means ( 35 to 38), a control unit (31) that corrects based on the operation of the vehicle, and a blower mode switching unit (20,) that switches between a face mode for blowing conditioned air toward the passenger's upper body and another blowout mode. 22 and 24) and rear seat occupant detection means (44) for detecting the presence or absence of a rear seat occupant, and the control means (31) selects the blowing mode based on the control characteristics of the blowing mode, and The control characteristic of the blowing mode when it is determined that there is a rear seat occupant based on the output of the detection means (44) is a control characteristic in which the face mode is more easily selected than when it is determined that there is no rear seat occupant. And wherein the are.
[0014]
According to this, it is easier to select the face mode when there are passengers in the backseat, and in the face mode, the wind flow from the front to the rear of the passenger compartment is more easily formed than in the other blowing modes, and therefore very much Even when the airflow is learned at a low air volume, the air-conditioned air can easily reach the rear seat, so that the comfort of the rear seat passenger can be ensured.
[0015]
In the invention according to claim 6, when the control means (31) determines that there is a rear seat occupant and sets the air conditioning capacity to a predetermined value or more, the operation means (35 to 38) is configured to decrease the air conditioning capacity. When the operation is performed, the control means (31) is characterized in that the amount of decrease in the air conditioning capacity is reduced as compared with the case where the air conditioning capacity is not set to a predetermined value or more.
[0016]
According to this, when an operation is performed to reduce the air conditioning capacity when there are passengers in the rear seats, the amount of decrease in the air conditioning capacity is reduced so that the air conditioning capacity is maintained as much as possible. The passenger comfort can be maintained.
[0017]
The invention according to claim 7 is characterized in that the control means (31) is more likely to execute control to make the air conditioning capacity equal to or greater than a predetermined value as the air conditioning heat load is larger.
[0018]
According to this, since it is possible to reliably increase the air conditioning capacity as the situation where it can be estimated that the degree of discomfort of the rear seat occupant is high, the comfort of the rear seat occupant can be improved.
[0019]
The invention according to claim 9 is an air conditioner for a vehicle having three or more rows of seats, and the control means (31) is rearward of the third row when a passenger is behind the third row. Control that makes the air conditioning capacity equal to or higher than a predetermined value is more easily performed than when no passenger is present on the seat.
[0020]
According to this, the comfort of the passenger | crew who exists in the back seat from the 3rd row can be improved.
[0021]
In the invention according to claim 10, the vehicle is provided with a limiting unit that is operated by the occupant to limit the amount of increase in the air conditioning capability by the control unit (31). It is characterized by changing the amount of increase.
[0022]
According to this, when an occupant is present in the rear seat, for example, when the air flow rate is increased to increase the air conditioning capacity, the increase in the air flow rate is prohibited or suppressed based on the operation of the restricting means, thereby making the air blowing sound uncomfortable. It can respond to the passenger's preference.
[0023]
In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
FIG. 1 shows an overall system configuration of a vehicle air conditioner according to a first embodiment of the present invention. This vehicle air conditioner automatically controls the operation of an air conditioning control device based on stored control characteristics. Thus, the blowout temperature, the blown air volume, the suction mode, the blowout mode, and the like are automatically controlled, and the stored control characteristics are corrected based on the passenger instruction.
[0025]
An inside / outside air switching box 11 as a suction mode switching means is arranged on the most upstream side of the air flow of the air conditioning unit 10 constituting the indoor unit of the vehicle air conditioner. The inside / outside air switching box 11 is connected to the outside air inlet 11a and the inside air. While having the introduction port 11b, the inside / outside air switching door 12 is rotatably installed in the inside / outside air switching box 11.
[0026]
The inside / outside air switching door 12 is arranged at a branch point between the outside air introduction port 11a and the inside air introduction port 11b and is driven by the actuator 12a to switch the air introduced into the air conditioning unit 10 between the inside air and the outside air, or between the inside air and the outside air. Adjust the mixing ratio of outside air.
[0027]
A blower 13 as a blowing means is disposed downstream of the inside / outside air switching box 11. The blower 13 sucks air into the inside / outside air switching box 11 and blows it to the downstream side of the air conditioning unit 10. And a centrifugal blower fan 15 connected to the rotating shaft. An evaporator 16 and a heater core 17 are provided downstream of the blower fan 15.
[0028]
The evaporator 16 is a heat exchanger for cooling, and is combined with a compressor or the like driven by a vehicle engine (not shown) to constitute a refrigeration cycle. The low-pressure refrigerant in the interior absorbs heat from the air and evaporates to cool the air. To do. The heater core 17 is a heat exchanger for heating, and cooling water (hot water) of a vehicle engine (not shown) circulates inside, and heats the air using the engine cooling water as a heat source.
[0029]
On the upstream side of the heater core 17, an air mix door 18 as a blown air temperature adjusting means is rotatably provided, and the opening degree of the air mix door 18 is adjusted by being driven by an actuator 18a. Thereby, the ratio of the air passing through the heater core 17 and the air bypassing the heater core 17 is adjusted, and the temperature of the air blown out into the passenger compartment is adjusted.
[0030]
At the most downstream of the air conditioning unit 10, a defroster door 20 that opens and closes a defroster (DEF) outlet 19, a face door 22 that opens and closes a face (FACE) outlet 21, and a foot door 24 that opens and closes a foot (FOOT) outlet 23. Is provided.
[0031]
Each of these doors 20, 22, and 24 constitutes a blow mode switching means, and is driven by an actuator 25 to open and close the blow outlets 19, 21, and 23. Level mode, foot mode, foot differential mode, defroster mode, etc. are set. Then, the temperature-adjusted air is blown out into the passenger compartment from the blow-out opening that opens in accordance with each blowing mode.
[0032]
The face outlet 21 is provided with a swing grill 21a as a wind direction adjusting means capable of adjusting the blowing direction of the conditioned air. The swing grill 21a is driven by a louver by an actuator such as a step motor. The air-conditioning wind blowing direction in the vehicle left-right direction and vehicle vertical direction can be adjusted.
[0033]
The air-conditioning control device 30 has a microcomputer 31 as control means, and the amount of blown air is adjusted by adjusting the applied voltage (blower voltage) of the blower motor 14 via the drive circuit 32 based on the output signal from the microcomputer 31. It is controlled by adjusting the rotation speed. The other actuators 12a, 18a, and 25 are also controlled via the drive circuit 32 based on the output signal from the microcomputer 31.
[0034]
The microcomputer 31 has a central processing unit (CPU), a ROM, a RAM, a standby RAM, an I / O port, an A / D conversion unit, and the like (not shown) and is well known per se.
[0035]
The standby RAM is a RAM for storing (backing up) a learned value of passengers even when an ignition switch (hereinafter referred to as IG) for intermittently driving the vehicle engine is off, and IG is off. In addition, power is directly supplied from the vehicle battery without going through the IG. Further, a backup power source (not shown) is provided for supplying power to the microcomputer 31 for a short time even when the electrical connection between the microcomputer 31 and the battery is interrupted.
[0036]
An operation signal is input to the microcomputer 31 from an air conditioning operation unit 33 installed in the vehicle interior instrument panel. The air conditioning operation unit 33 includes an AUTO switch 34 for setting an automatic control state of the air conditioner, an inside / outside air changeover switch 35 for manually setting the inside / outside air suction mode, and a blowout for manually setting the blowout mode. A mode changeover switch 36, an airflow changeover switch 37 for manually setting the airflow of the blower 13, a temperature setting switch 38 for setting a passenger's favorite temperature, and the like are provided. The inside / outside air changeover switch 35, the blowout mode changeover switch 36, the air flow rate changeover switch 37, and the temperature setting switch 38 all correspond to operation means.
[0037]
The air volume switching switch 37 is specifically composed of an air volume up switch 37a and an air volume down switch 37b. Each time the air volume up switch 37a is pressed, the blower voltage (applied voltage to the drive motor 14) is set. A signal that increases one level (0.25 volt) is output, and the air volume down switch 37b outputs a signal that decreases the blower voltage by one level (0.25 volt) each time it is pressed. Incidentally, in this example, the blower voltage at the maximum air volume Hi is set to 12V, and the blower voltage at the minimum air volume Lo is set to 4.5V.
[0038]
In addition, the microcomputer 31 receives signals from various sensors that detect environmental conditions (air conditioning heat load) that affect the air conditioning state in the passenger compartment. Specifically, an inside air temperature sensor 39 that detects an air temperature (inside air temperature) TR in the vehicle interior, an outside air temperature sensor 40 that detects an air temperature outside the vehicle interior (outside air temperature) TAM, and an amount of solar radiation TS that enters the vehicle interior. A solar radiation sensor 41 for detecting, an evaporator temperature sensor 42 for detecting an evaporator temperature (specifically, an evaporator blown air temperature) TE, a water temperature sensor 43 for detecting an engine water temperature TW circulating in the heater core 17, and a rear seat. Each signal from a seat sensor 44 or the like as a rear seat occupant detection means for detecting the presence or absence of a rear seat occupant is input to the microcomputer 31 via the respective level conversion circuits 45, and these signals are output from the microcomputer 31 to the A / D-converted and read. The signal from the temperature setting switch 38 is also level-converted by the level conversion circuit 45 and input to the microcomputer 31.
[0039]
FIG. 2 is an overall flowchart of the present invention executed by the microcomputer 31, and the control of FIG. First, in step S100, initial values such as various conversions and flags are set. In the next step S200, operation signals of various switches 34 to 38 of the air conditioning operation unit 33 and sensor detection signals from various sensors 39 to 44 are read.
[0040]
In the next step S300, the target blowing temperature TAO of the air blown into the vehicle interior is calculated by the following formula 1 based on the set temperature TSET read in step S200, the sensor detection signal, and the like. Here, TAO is the blown air temperature necessary for maintaining the passenger compartment at the set temperature TSET regardless of changes in environmental conditions.
[0041]
[Expression 1]
TAO = KSET × TSET-KR × TR-KAM × TAM-KS × TS + C
However, KSET, KR, KAM, and KS are coefficients, C is a constant, and TSET, TR, TAM, and TS are the set temperature, the inside air temperature, the outside air temperature, and the amount of solar radiation, respectively.
[0042]
Next, it progresses to step S400 and the blower voltage which determines ventilation volume is determined based on said TAO. Here, since there are individual differences in the air volume desired by the occupant, it is difficult to uniformly determine the air volume. Therefore, in the present embodiment, by correcting the blower voltage calculation map as the air flow control characteristic based on the passenger's manual operation related to the air flow, the blower voltage calculation map learning the passenger's preference is obtained. Yes. This will be described in detail later.
[0043]
Next, it progresses to step S500 and the opening degree SW of the air mix door 18 is calculated based on TAO, TE, and TW. Next, it progresses to step S600 and calculates the introduction ratio of inside air and outside air by the inside / outside air switching door 12 based on TAO. Next, in step S700, the blowing mode by the blowing mode doors 20, 22, and 24 is calculated based on TAO. Next, in step S800, control of the compressor is determined so that the evaporator temperature TE is maintained at the target evaporator temperature.
[0044]
In step S900, the control signals determined in steps S400 to S800 are added to the blower motor 24, the actuators 12a, 18a, 25, the swing grill 21a and the compressor via the drive circuit 32, and the blower motor 24 is added. And the operation of each actuator 12a, 18a, 25, swing grill 21a and compressor. After the process of step S900, the process returns to step S200, and the above process is repeated.
[0045]
3 and 4 exemplify specific processing for determining the blower voltage in step S400 of FIG. 2, and will be described in detail below.
[0046]
First, in FIG. 3, in step S410, it is determined whether or not the current blowing mode is the face (FACE) mode. If the blowing mode is the face mode, step S410 is YES and the process proceeds to step S411. In step S411, it is determined whether or not the occupant has manually changed the airflow rate by operating the airflow rate changeover switch 37. If the airflow rate has been manually changed, step S411 becomes YES and the process proceeds to step S412. In step S <b> 412, the blower voltage calculation map in the face mode shown in FIG.
[0047]
Next, the process proceeds from step S412 to step S413, and the blower voltage is calculated based on the TAO from the blower voltage calculation map in the face mode. If step S411 is NO, the process immediately proceeds to step S413, and the blower voltage is calculated.
[0048]
If NO in step S410, the process proceeds to step S420. In step S420, it is determined whether the current blowing mode is the bi-level (B / L) mode. If the blowing mode is the bi-level mode, step S420 is performed. It becomes YES and progresses to step S421. In step S421, it is determined whether or not the occupant has manually changed the airflow rate by operating the airflow rate changeover switch 37. If the airflow rate has been manually changed, step S421 becomes YES and the process proceeds to step S422.
[0049]
In step S422, the blower voltage calculation map in the bi-level mode shown in FIG. Next, the process proceeds from step S422 to step S423, and the blower voltage is calculated based on TAO from the blower voltage calculation map in the bi-level mode. If step S421 is NO, the process immediately proceeds to step S423, and the blower voltage is calculated.
[0050]
If NO in step S420, the process proceeds to step S430. In step S430, it is determined whether or not the current blowing mode is the foot (FOOT) mode. If the blowing mode is the foot mode, step S430 becomes YES and step S431. Proceed to In step S431, it is determined whether or not the occupant has manually changed the airflow rate by operating the airflow rate changeover switch 37. If the airflow rate has been manually changed, step S431 becomes YES and the process proceeds to step S432.
[0051]
In Step S432, the blower voltage calculation map in the foot mode shown in FIG. Next, the process proceeds from step S432 to step S433, and the blower voltage is calculated based on TAO from the blower voltage calculation map in the foot mode. If step S431 is NO, the process immediately proceeds to step S433, and the blower voltage is calculated.
[0052]
If NO in step S430, the process proceeds to step S440. In step S440, it is determined whether or not the current blowing mode is the foot differential (F / D) mode. If the blowing mode is the foot differential mode, step S440 is YES. And the process proceeds to step S441. In step S441, it is determined whether or not the occupant has manually changed the airflow rate by operating the airflow rate changeover switch 37. If the airflow rate has been manually changed, step S441 becomes YES and the process proceeds to step S442.
[0053]
In step S442, the blower voltage calculation map at the time of the foot differential mode shown in FIG. Next, the process proceeds from step S442 to step S443, and the blower voltage is calculated based on TAO from the blower voltage calculation map in the foot differential mode. If step S441 is NO, the process immediately proceeds to step S443, and the blower voltage is calculated.
[0054]
If step S440 is NO, the process proceeds to step S451. Incidentally, when the process proceeds to step S451 based on the mode determination results in steps S410 to S440, the current blowing mode is the defroster (DEF) mode. In step S451, it is determined whether or not the occupant has manually changed the airflow rate by operating the airflow rate changeover switch 37. If the airflow rate has been manually changed, step S451 becomes YES and the process proceeds to step S452. .
[0055]
In step S452, the blower voltage calculation map in the defroster mode shown in FIG. 5E is changed based on the operation of the air flow rate changeover switch 37. Next, the process proceeds from step S452 to step S453, and the blower voltage is calculated based on TAO from the blower voltage calculation map in the defroster mode. If step S451 is NO, the process immediately proceeds to step S453, and the blower voltage is calculated.
[0056]
As described above, by correcting the blower voltage calculation map corresponding to each blowing mode in steps S412, S422, S432, S442, and S452 based on the operation of the blowing amount changeover switch 37, Preference is learned.
[0057]
Here, an example of a specific learning method of the blower voltage calculation map in step S412 and the like will be described with reference to FIG. A characteristic A in FIG. 6A is an original characteristic at the time of shipment of the air conditioner, and this is set in advance to suit general passenger preference through experiments or the like and stored in the ROM of the microcomputer 31. . Therefore, the blower voltage is calculated based on the original characteristics of FIG. 6A when the occupant operation related to the air flow rate has never been learned.
[0058]
When the first operation of the air flow rate changeover switch 37 is performed by the occupant, the blower voltage is a level (maximum air flow rate Hi) in the original air flow rate control characteristic A of FIG. When the blower voltage is lowered to the level of the operating point 1 by the occupant's operation, the occupant operation is learned, and the inclined portion of the original characteristic A is passed through the operating point 1 on the left side of FIG. Translated to the low temperature side of TAO. A solid line B in FIG. 6A shows the control characteristics after learning the first passenger operation.
[0059]
Next, FIG. 6B shows learning by the second occupant operation. In the control characteristic B after the first learning, when the blower voltage is at the b level (small air volume close to the minimum air volume Lo), When the blower voltage is raised to the level of the operating point 2 by the occupant's operation, the inclination θ of the inclined portion of the control characteristic is changed so as to pass through both the operating point 1 and the operating point 2 this time. A solid line C in FIG. 6B shows the control characteristics after learning the second passenger operation.
[0060]
Next, FIG. 6C shows learning by the third occupant operation. In the control characteristic C after the second learning, the blower voltage is c level (the air flow rate at the operation point 2 and the minimum air flow rate Lo). When the blower voltage is lowered to the Lo level of the minimum airflow at the operating point 3 by the occupant's operation, the inclination θ of the inclined portion in the control characteristic C after the second learning is now obtained. Then, the operating point 1, the operating point 2 and the operating point 3 are changed to a slope that approximates the least square. Therefore, the control characteristic after learning the third passenger operation is as shown by a solid line D in FIG. For occupant operations four or more times, each operation point is changed to a slope that approximates the least square.
[0061]
After the process of FIG. 3 described above, the process shown in FIG. 4 is executed. Hereinafter, the process illustrated in FIG. 4 will be described.
[0062]
In step S461, the presence or absence of a rear seat occupant is determined based on a signal from the seat sensor 44. If there is a occupant in the rear seat, step S461 becomes YES and the process proceeds to step S462. In step S462, it is determined whether or not the blower voltage calculated in any of steps S413, S423, S433, S443, and S453 is less than 7.5V depending on the current blowing mode, and the calculated blower voltage is 7.5V. If less, step S462 becomes YES and proceeds to step S463.
[0063]
Here, the air flow rate when the blower voltage is 7.5 V corresponds to the air flow rate necessary for air conditioning of the entire vehicle interior, but the air flow rate may be insufficient depending on the condition of the air conditioning heat load at that time. Therefore, in step S463, the original blower voltage is calculated from the original characteristics, and the blower voltage is returned to the original blower voltage, thereby increasing the air flow rate, that is, increasing the air conditioning capacity to a predetermined value or more.
[0064]
Next, the process proceeds from step S463 to step S464. In step S464, the amount of increase in the blower voltage in step S463, that is, the value obtained by subtracting the blower voltage at step S462 from the blower voltage changed in step S463 is 0.75 V. It is determined whether or not it is above, and if the increase amount of the blower voltage is 0.75 V or more, step S464 becomes YES and the process proceeds to step S465.
[0065]
In step S465, specifically, the louver direction of the swing grill 21a is adjusted so that the conditioned air blown from the face outlet 21 is directed toward the rear seat occupant side so that the air volume ratio to the rear seat increases. Set. Next, the process proceeds from step S465 to step S466. In step S466, the blower voltage in step S463 is output, and the process proceeds to the next step S500.
[0066]
On the other hand, if any of steps S461, S463, and S464 is NO, the process proceeds to step S467. In step S467, the direction of the louver of the swing grill 21a is set so that the air volume ratio to the rear seat is reduced as compared with the air volume ratio set in step S465 so as to be the basic air volume ratio. Set. Next, the process proceeds from step S467 to step S466. In step S466, the blower voltage calculated in any of steps S413, S423, S433, S443, S453, and S463 is output, and the process proceeds to the next step S500.
[0067]
As described above, when there is a passenger in the rear seat, the airflow capacity is increased to a predetermined value or more in step S463 and the air volume ratio to the rear seat is increased in step S465. Accordingly, it is possible to secure the comfort of the rear seat occupant while eliminating the troublesomeness of changing the setting according to the situation.
[0068]
In addition, when step S464 is YES, the air flow rate is considerably larger than the learned favorite air flow rate, so that if the front seat occupant prefers a low air flow rate, the wind speed may be out of the preferred range, but step S465. Since the conditioned air is directed toward the rear seat occupant, an increase in wind speed of the front seat occupant can be suppressed.
[0069]
(Second Embodiment)
In the present embodiment, the outside air suction mode is easily selected when a passenger is in the rear seat. And this embodiment adds the process shown in FIG. 7 to step S600 (refer FIG. 2) of the inside / outside air suction mode determination of the said 1st Embodiment, and steps S461-step S465 and step S467 of 1st Embodiment. (See FIG. 4) is deleted.
[0070]
In FIG. 7, in step S610, the presence or absence of a rear seat occupant is determined based on a signal from the seat sensor 44. If there is a occupant in the rear seat, step S610 becomes YES and the process proceeds to step S620. In step S620, it is determined whether or not the blower voltage calculated in any of steps S413, S423, S433, S443, and S453 (see FIG. 3) is less than 7.5 V according to the current blowing mode, and the calculated blower is calculated. If the voltage is less than 7.5 V, step S620 becomes YES and the process proceeds to step S630.
[0071]
If step S620 is YES, the air flow rate may be insufficient. Therefore, in step S630, the value obtained by subtracting the blower voltage in step S620 from the original blower voltage, that is, the insufficient amount of blower voltage is 0.75 V or more. It is determined whether or not. If the insufficient amount of blower voltage is 0.75 V or more, step S630 becomes YES and the process proceeds to step S640.
[0072]
In step S640, the outside air introduction rate is calculated based on the TAO from the suction mode control characteristics shown in step S640, and the process proceeds to the next step S700.
[0073]
On the other hand, if any of steps S610, 620, and 630 is NO, the process proceeds to step S650. In step S650, the outside air introduction rate is calculated based on the TAO from the suction mode control characteristics shown in step S650, and the process proceeds to the next step S700.
[0074]
Here, in the control characteristics of step S640, the outside air introduction rate is 100% in the region where TAO is −13 ° C. or higher, that is, the outside air suction mode is selected. In the control characteristics of step S650, TAO is in the region where −3 ° C. or more. The outside air suction mode is selected.
[0075]
Therefore, when there is a passenger in the rear seat, the outside air suction mode is easily selected, and in the outside air suction mode, a wind flow from the front to the rear of the passenger compartment is more easily formed than in the inside air suction mode, and the air flow is extremely low. Even if it is learned, the air conditioning wind can easily reach the rear seat, so that the comfort of the rear seat occupant can be ensured.
[0076]
(Third embodiment)
In the present embodiment, the face mode is easily selected when a passenger is in the rear seat. And this embodiment adds the process shown in FIG. 8 to step S700 (refer FIG. 2) of the blowing mode determination of the said 1st Embodiment, step S461-step S465 of 1st Embodiment, and step S467 (FIG. 4) is deleted.
[0077]
In FIG. 8, in step S710, the presence or absence of a rear seat occupant is determined based on a signal from the seat sensor 44. If there is a rear seat occupant, step S710 becomes YES and the process proceeds to step S720. In step S720, it is determined whether or not the blower voltage calculated in any of steps S413, S423, S433, S443, and S453 (see FIG. 3) is less than 7.5 V depending on the current blowout mode. If the voltage is less than 7.5V, step S720 becomes YES and the process proceeds to step S730.
[0078]
If step S720 is YES, the air flow rate may be insufficient. Therefore, in step S730, the value obtained by subtracting the blower voltage in step S720 from the original blower voltage, that is, the insufficient amount of blower voltage is 0.75 V or more. It is determined whether or not. If the insufficient amount of blower voltage is 0.75 V or more, step S730 becomes YES and the process proceeds to step S740.
[0079]
In step S740, the outlet is calculated and output based on the TAO from the control characteristics of the blowing mode shown in step S740, and the process proceeds to the next step S800.
[0080]
On the other hand, if any of steps S710, 720, and 730 is NO, the process proceeds to step S750. In step S750, a blower outlet is calculated based on TAO from the control characteristics of the blowout mode shown in step S750, and is output. 800 Proceed to
[0081]
Here, in the control characteristic of step S740, the face mode is selected in a region where TAO is 30 ° C. or lower, and in the control characteristic of step S750, the face mode is selected in a region where TAO is 25 ° C. or lower.
[0082]
Therefore, the face mode is easier to select when there are passengers in the rear seats, and in the face mode it is easier to form a wind flow from the front to the rear of the passenger compartment than in other blowout modes, and learning at a very low air volume Even if the air conditioning is performed, the conditioned air can easily reach the rear seat, so that the comfort of the rear seat occupant can be ensured.
[0083]
(Fourth embodiment)
In the present embodiment, when an operation is performed to reduce the air flow rate when there is a passenger in the rear seat, the control for maintaining the air flow rate as much as possible by reducing the decrease amount of the air conditioning capacity is performed as in the first embodiment. In addition to the form. In order to perform the above control, the process shown in FIG. 4 of the first embodiment is changed as shown in FIG.
[0084]
In FIG. 9, if there is a passenger in the rear seat and step S461 becomes YES, and further step S462 and step S464 become YES, the process proceeds from step S465 to step S471.
[0085]
In step S471, it is determined whether or not an operation for lowering the air flow rate is performed by the air flow rate changeover switch 37. If there is an operation for lowering the air flow rate, step S471 becomes YES and the process proceeds to step S472. In step S472, each time the air volume down switch 37b of the air volume switching switch 37 is operated once, the blower voltage is set to a value that is 0.75 V lower than the blower voltage set in step S463. Next, the process proceeds from step S472 to step S466. In step S466, the blower voltage set in step S472 is output, and the process proceeds to the next step S500.
[0086]
On the other hand, if there is no occupant in the rear seat, step S461 becomes NO, and the process proceeds from step S467 to step S473. In step S473, it is determined whether or not an operation for lowering the air flow rate is performed by the air flow rate changeover switch 37. If there is an operation for lowering the air flow rate, step S473 becomes YES and the process proceeds to step S474. In step S474, each time the air volume down switch 37b of the air flow rate changeover switch 37 is operated once, 1.25V is calculated from the blower voltage calculated in any of steps S413, S423, S433, S443, and S453 (see FIG. 3). Set the blower voltage to the reduced value. Next, the process proceeds from step S474 to step S466. In step S466, the blower voltage set in step S474 is output, and the process proceeds to the next step S500.
[0087]
In the present embodiment, when it is determined in step S461 that there is a rear seat occupant and the air flow rate, that is, the air conditioning capacity is set to a predetermined value or more in step S463, an operation for decreasing the air flow rate is performed. In S472, the amount of decrease in the air flow rate is reduced compared to when the air flow rate is not greater than or equal to the predetermined value.
[0088]
According to this, even when an operation is performed to reduce the air flow rate when there is a passenger in the rear seat, the air flow rate is kept as low as possible by reducing the air flow rate reduction. Can be maintained.
[0089]
(Fifth embodiment)
In the present embodiment, control that makes it easier to increase the air flow as the air-conditioning heat load such as the outside air temperature and the amount of solar radiation is larger is added to the first embodiment. In order to perform the above control, the process shown in FIG. 4 of the first embodiment is changed as shown in FIG.
[0090]
In FIG. 10, if there is a passenger in the rear seat, step S461 becomes YES, and the process proceeds to step S481. In step S481, it is determined whether or not the temperature difference between the outside air temperature TAM and the set temperature TSET is 10 ° C. or more. If the temperature difference is 10 ° C. or more, step S481 becomes YES and the process proceeds to step S483. If step S481 is NO, the process proceeds to step S482. In step S482, the solar radiation amount TS is 500 W / m. ² It is determined whether or not the solar radiation amount TS is 500 W / m. ² If it is above, step S482 will become YES and will progress to step S483.
[0091]
In Step S483, it is determined whether or not the blower voltage calculated in any of Steps S413, S423, S433, S443, and S453 (see FIG. 3) is less than 8.25 V depending on the current blowout mode. If the voltage is less than 8.25 V, step S483 becomes YES and the process proceeds to step S463. In step S463, the original blower voltage is calculated from the original characteristics, and the blower voltage is returned to the original blower voltage, thereby increasing the air flow rate, that is, increasing the air conditioning capacity to a predetermined value or more.
[0092]
In the present embodiment, when at least one of step S481 and step S482 is YES, that is, when the air conditioning heat load is large, when the calculated blower voltage is less than 8.25 V, the air flow rate is increased in step S463, When both step S481 and step S482 are NO, that is, when the air-conditioning heat load is small, the air flow rate is increased in step S463 only when the calculated blower voltage is less than 7.5V.
[0093]
Therefore, when the air conditioning heat load is large and the discomfort level of the rear seat occupant can be estimated to be high, the control for increasing the air volume becomes easier to be executed, and the air volume can be reliably increased. Comfort can be improved.
[0094]
(Sixth embodiment)
In the present embodiment, control that makes it easier to increase the blown air volume as the number of rear seat passengers increases is added to the first embodiment. In order to perform the above control, the process shown in FIG. 4 of the first embodiment is changed as shown in FIG.
[0095]
In FIG. 11, if there is a passenger in the rear seat, step S461 becomes YES, and the process proceeds to step S491. In step S491, it is determined whether or not there are two or more rear-seat occupants, or in the case of a vehicle having a third-row seat, whether or not there is an occupant in the third-row seat. If step S491 is YES, the process proceeds to step S492. move on.
[0096]
In step S492, it is determined whether or not the blower voltage calculated in any of steps S413, S423, S433, S443, and S453 (see FIG. 3) is less than 8.25 V depending on the current blowing mode. If the voltage is less than 8.25 V, step S492 becomes YES and the process proceeds to step S463. In step S463, the original blower voltage is calculated from the original characteristics, and the blower voltage is returned to the original blower voltage, thereby increasing the air flow rate, that is, increasing the air conditioning capacity to a predetermined value or more.
[0097]
In the present embodiment, when step S491 is YES, the blower amount is increased in step S463 when the calculated blower voltage is less than 8.25 V. On the other hand, when step S491 is NO, the calculated blower voltage is 7. Only when the voltage is less than 5 V, the air flow rate is increased in step S463.
[0098]
Therefore, when the number of rear seat occupants is large and the air conditioning heat load is large and it can be estimated that the degree of discomfort for the rear seat occupants is high, it becomes easier to execute the control for increasing the air flow rate, and the air flow rate is reliably increased. Therefore, the comfort of the rear seat occupant can be improved.
[0099]
In addition, when there is an occupant in the third row seat, it becomes easier to execute the control to increase the air flow rate, and the air flow rate can be increased to surely blow the air to the third row seat. Crew comfort can be improved.
[0100]
(Seventh embodiment)
In each of the above embodiments, the amount of air flow is increased when a passenger is in the rear seat. However, in this embodiment, control for prohibiting the increase in the amount of air flow is added based on the passenger operation. In order to perform the above control, the process shown in FIG. 4 of the first embodiment is changed as shown in FIG.
[0101]
Further, in the present embodiment, a rear seat correction cancel switch (not shown) is provided as a restricting means for prohibiting an increase in the amount of air flow when there is a passenger in the rear seat, and the rear passenger operates by operating this switch. A signal for prohibiting an increase in the amount of air flow when a passenger is present in the seat is output.
[0102]
In FIG. 12, if there is a passenger in the rear seat, step S461 becomes YES, and the process proceeds to step S401. In step S401, it is determined whether or not a blowing amount increase prohibition signal is output from the rear seat correction cancel switch. If the blowing amount increase prohibition signal is not output, step S401 is NO and the process proceeds to step S462. Then, similarly to the first embodiment, control is performed to increase the air flow rate when the user gets on the rear seat.
[0103]
On the other hand, if the air volume increase prohibition signal is output, step S401 becomes YES and the process proceeds to step S467. Therefore, in this case, control for increasing the air flow rate is not performed even if there is a passenger in the rear seat.
[0104]
In the present embodiment, when the air flow increase prohibition signal is output, the increase in the air flow is prohibited, but the air flow increase prohibition signal is not output. For example, it may be suppressed to half of the case.
[0105]
And when the ventilation volume increase prohibition signal is output, it can respond to the passenger | crew's liking which feels a blowing sound unpleasant by performing the restriction | limiting which prohibits or suppresses the increase in ventilation volume.
[0106]
(Other embodiments)
In the above embodiment, the seat sensor 44 is used as the rear seat occupant detection means for detecting the presence or absence of the rear seat occupant, but the presence or absence of the rear seat occupant may be detected by an infrared sensor instead of the seat sensor 44. . It is also possible to mount a communication device that automatically communicates with the personal portable device and detect the presence or absence of a rear seat passenger by communication between them.
[0107]
Moreover, in the said embodiment, when there existed the passenger | crew in the backseat, it increased the air flow capacity and increased the air-conditioning capacity. However, the air-conditioning capacity may be increased by changing the blown air temperature.
[0108]
Moreover, in 1st Embodiment, when the passenger | crew was in the backseat, it increased the air flow rate and increased the air volume ratio to the backseat. Thus, the control that facilitates selection of the outside air suction mode and the face mode may be performed simultaneously.
[Brief description of the drawings]
FIG. 1 is an overall system diagram of a first embodiment of the present invention.
FIG. 2 is a flowchart showing the entire air conditioning control of the first embodiment.
FIG. 3 is a flowchart showing control of a main part of the first embodiment.
FIG. 4 is a flowchart showing control of a main part of the first embodiment.
FIG. 5 is a control characteristic diagram of a blower voltage according to the first embodiment.
FIG. 6 is an explanatory diagram of a method for correcting a blower voltage control characteristic according to the first embodiment.
FIG. 7 is a flowchart showing control of main parts of the second embodiment.
FIG. 8 is a flowchart showing control of a main part of the third embodiment.
FIG. 9 is a flowchart showing control of main parts of the fourth embodiment.
FIG. 10 is a flowchart showing control of main parts of the fifth embodiment.
FIG. 11 is a flowchart showing control of main parts of the sixth embodiment.
FIG. 12 is a flowchart showing control of main parts of the seventh embodiment.
[Explanation of symbols]
31 ... Microcomputer (control means),
35 to 38 ... switch (operation means),
44 ... Seat switch (rear seat occupant detection means).

Claims (13)

The operation means (35 to 38) for the passenger to set the air conditioning state in the passenger compartment and the air conditioning state are automatically controlled based on the control characteristics, and this control characteristic is used for the operation of the operation means (35 to 38). In a vehicle air conditioner comprising control means (31) for correcting based on
A rear seat occupant detection means (44) for detecting the presence or absence of a rear seat occupant,
Wherein said control means (31) is less than the value determined that there rear-seat occupant based on the output, and the blast volume is equivalent to air volume required for the air conditioning of the entire passenger compartment of the rear-seat occupant detection means (44) Even if it is determined that there is a rear seat occupant based on the output of the rear seat occupant detection means (44) , the air conditioning capacity is increased to a predetermined value or more and the air volume ratio to the rear seat is increased. A vehicle air conditioner that automatically controls the air-conditioning state based on the corrected control characteristics when it is determined that the air volume is equal to or greater than a value corresponding to an air flow required for air conditioning of the entire vehicle interior . Blower means (13) for blowing conditioned air is provided, and the control means (31) increases the amount of conditioned air blown by the blower means (13) to increase the air conditioning capacity to a predetermined value or more. The vehicle air conditioner according to claim 1, wherein A wind direction adjusting means (21a) which is installed at a part for blowing out the conditioned air into the vehicle interior and is capable of adjusting a blowing direction of the conditioned air;
The said control means (31) increases the air volume ratio to the said rear seat by controlling the said air direction adjustment means (21a) and changing the blowing direction of the said air-conditioning wind, The said 1st aspect is characterized by the above-mentioned. The vehicle air conditioner according to 2. The operation means (35 to 38) for the passenger to set the air conditioning state in the passenger compartment and the air conditioning state are automatically controlled based on the control characteristics, and this control characteristic is used for the operation of the operation means (35 to 38). In a vehicle air conditioner comprising control means (31) for correcting based on
A suction mode switching means (11) for switching between an inside air suction mode for introducing inside air and an outside air suction mode for introducing outside air, and a rear seat occupant detection means (44) for detecting the presence or absence of a rear seat occupant,
The control means (31) selects the suction mode based on the control characteristics of the suction mode,
The control characteristic of the suction mode when it is determined that there is a rear seat occupant based on the output of the rear seat occupant detection means (44) is more easily selected than when it is determined that there is no rear seat occupant. It has become a control characteristics,
When the control means (31) determines that there is a rear seat occupant based on the output of the rear seat occupant detection means (44) and determines that the air flow rate is more than a predetermined value, the rear seat occupant Even if the suction mode is selected based on the control characteristics of the suction mode when it is determined to be present, and it is determined that there is a rear seat occupant based on the output of the rear seat occupant detection means (44), the air flow rate is a predetermined value or more. When it is determined that there is no shortage , the vehicle air conditioner is configured to select the suction mode based on the same control characteristics of the suction mode as when the rear seat occupant is determined to be absent . The operation means (35 to 38) for the passenger to set the air conditioning state in the passenger compartment and the air conditioning state are automatically controlled based on the control characteristics, and this control characteristic is used for the operation of the operation means (35 to 38). In a vehicle air conditioner comprising control means (31) for correcting based on
Blowing mode switching means (20, 22, 24) for switching the face mode and other blowing modes for blowing conditioned air toward the occupant upper body, and rear seat occupant detection means (44) for detecting the presence or absence of a rear seat occupant ,
The control means (31) selects the blowing mode based on the control characteristics of the blowing mode,
The control characteristic of the blowing mode when it is determined that there is a rear seat occupant based on the output of the rear seat occupant detection means (44) is such that the face mode is more easily selected than when it is determined that there is no rear seat occupant. It is a characteristic ,
When the control means (31) determines that there is a rear seat occupant based on the output of the rear seat occupant detection means (44) and determines that the air flow rate is more than a predetermined value, the rear seat occupant Even when the blowing mode is selected based on the control characteristics of the blowing mode when it is determined to be present, and it is determined that there is a rear seat occupant based on the output of the rear seat occupant detection means (44), the air flow rate is not less than a predetermined value. When it is determined that there is no shortage , the vehicle air conditioner is configured to select a blowing mode based on the same control characteristics of the blowing mode as when it is determined that there is no rear seat occupant . When the operation means (35-38) is operated so as to reduce the air-conditioning capacity when the control means (31) determines that there is a rear seat occupant and sets the air-conditioning capacity to a predetermined value or more. ,
The said control means (31) reduces the fall amount of the said air-conditioning capability compared with the time when the said air-conditioning capability is not made more than predetermined value, The one of Claim 1 thru | or 3 characterized by the above-mentioned. Vehicle air conditioner. 7. The control unit (31) according to any one of claims 1 to 3, and 6, wherein the control means (31) is more likely to execute control to make the air conditioning capacity equal to or greater than a predetermined value as the air conditioning heat load is larger. The vehicle air conditioner described in 1. The vehicle air conditioner according to claim 7, wherein the air conditioning heat load is at least one of a solar radiation amount, a difference between an outside air temperature and a vehicle interior set temperature, and a number of rear seat passengers. A vehicle air conditioner comprising three or more rows of seats,
When the occupant is in the seat behind the third row, the control means (31) performs control to make the air conditioning capacity equal to or higher than the predetermined value than when there is no occupant in the seat behind the third row. The vehicle air conditioner according to any one of claims 1 to 3 and 6, wherein the vehicle air conditioner is easy to operate. Operated by the occupant, comprising limiting means for limiting the amount of increase in the air conditioning capacity by the control means (31),
The air conditioning system for a vehicle according to any one of claims 1 to 3, 6 to 9, wherein the control means (31) changes the amount of increase in the air conditioning capacity based on an operation of the restriction means. apparatus. A program for causing a computer of a vehicle air conditioner to automatically control an air conditioning state in a passenger compartment based on a control characteristic, and to execute a procedure for correcting the control characteristic based on an operation of an operation unit. A procedure for determining the presence or absence of a rear seat occupant, a procedure for determining whether or not the air flow rate is less than the value corresponding to the air flow rate required for air conditioning of the entire vehicle interior, and determining that there is a rear seat passenger and the air flow rate Is determined to be less than the value corresponding to the air flow required for air conditioning of the entire passenger compartment, and the air conditioning capacity is determined to be greater than or equal to a predetermined value , and it is determined that there is a rear seat passenger and the air flow is The procedure to increase the air flow rate to the rear seat when it is determined that the air flow rate is less than the value corresponding to the required air flow rate, the air flow rate required for air conditioning of the entire passenger compartment Greater than or equal to A program characterized by executing the steps of automatically controlling the air-conditioning state based on the corrected control characteristic when it is determined. The procedure for determining the presence or absence of a rear seat occupant in the computer of the vehicle air conditioner, the procedure for determining whether or not the air flow rate is more than a predetermined value , and determining that there is a rear seat occupant and the air flow rate is predetermined When it is determined that the value is insufficient, the procedure for selecting a control characteristic that allows the outside air suction mode to be selected more easily than when it is determined that there is no rear seat occupant, and it is determined that there is a rear seat occupant and the air flow rate is predetermined. A program for executing a procedure for selecting a suction mode based on the same control characteristics of the suction mode as when determining that there is no rear seat occupant when it is determined that there is not a shortage of a value or more . The computer of the vehicle air-conditioning system, a procedure for determining whether a rear-seat occupant, the procedure determines whether the air blowing amount is insufficient or greater than a predetermined value, determines that there is a rear-seat occupant, and the air blowing amount is predetermined When it is determined that there is a shortage of more than the value, the procedure for selecting the control characteristics that make it easier to select the face mode than when it is determined that there is no backseat occupant, it is determined that there is a backseat occupant, and the air flow rate is a predetermined value A program for executing a procedure for selecting an air outlet mode based on the same control characteristics of the air outlet mode as that when determining that there is no rear seat occupant when it is determined that there is no shortage .

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