JP2002234328A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a comfortable feeling of warmth for an occupant in each of a right and a left rear air-conditioning zone irrespective of the presence or absence of uneven solar radiation without using an air distributing mechanism. SOLUTION: If a determining means S410 determines an absence of an occupant, conditioned air blown into a passenger seat air-conditioning zone 102a provides air-conditioning control of the air-conditioning zone 103b behind a passenger seat, so that the rear air-conditioning zones 103a and 103b can be air-conditioned differently between the right and left. Even under uneven solar radiation, an occupant in each of the right and left rear air-conditioning zones can be provided with a comfortable feeling of warmth without an air distributing mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of independently controlling the air conditioning of each of the front and rear air conditioning zones in the passenger compartment, and independently controlling the air conditioning of the right and left air conditioning zones of the front air conditioning zone. The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. Hei 5-193337 has proposed a vehicle air conditioner for controlling the air conditioning of the left and right air conditioning zones of a rear seat at the same target air outlet temperature. In this conventional device, the distribution ratio of the conditioned air from each of the left and right outlets is controlled in accordance with the direction of the solar radiation. The left and right occupants can get a comfortable feeling of warmth together.

[0003]

However, the prior art disclosed in the above-mentioned publication requires an air distribution mechanism for blowing out different air volumes at the left and right outlets, resulting in a large increase in manufacturing cost.

[0004] Further, this air distribution mechanism requires a large mounting space. Particularly, when the air distribution mechanism is mounted on a rear seat air conditioner installed behind a vehicle cabin, the mounting space is very small. It is difficult to mount the air distribution mechanism.

SUMMARY OF THE INVENTION In view of the above, the present invention has been made to make it possible for both occupants on the left and right sides of the rear air-conditioning zone to obtain a comfortable feeling of heat regardless of the presence or absence of unbalanced solar radiation without using an air distribution mechanism. It is intended to be realized.

[0006]

To achieve the above object, according to the first aspect of the present invention, a front air conditioning zone (101a, 102a) and a rear air conditioning zone (103a, 103b) of a vehicle interior (100) are provided. Are controlled independently of each other, and the right air conditioning zone (101
a) In a vehicle air conditioner that independently controls the air conditioning of the left air conditioning zone (102a), it is determined whether an occupant of at least one of the right and left air conditioning zones (101a, 102a) is absent. Determination means (S410) for determining whether or not the occupant is absent.
a), the air-conditioning zone (1) on the non-existent side of the rear air-conditioning zones (103a, 103b).
02a), the absent-side rear air conditioning zone (10
3b) is characterized in that air conditioning control is performed.

As a result, the rear air conditioning zone (103a,
103b) The absent-side rear air conditioning zone (103b)
Is controlled by air-conditioning air blown out to the absent-side air-conditioning zone (102a).
03a, 103b) can be in different air conditioning states.
Therefore, even in the case of unbalanced solar radiation, it is possible to realize that both the left and right occupants of the rear air conditioning zone can obtain a comfortable warm feeling without using the air distribution mechanism.

For example, when the occupant in the left air conditioning zone (102a) is absent and receives sunlight from the left side of the vehicle, the temperature of the conditioned air blown to the left and right of the rear air conditioning zone (103a, 103b) is calculated as follows. Rear air conditioning zone (103
a, 103b) so that the occupant on the right side can obtain a comfortable warm feeling. Then, the temperature of the conditioned air blown out to the left air conditioning zone (102a) is changed to the rear air conditioning zone (10a).
If the temperature is lower than the temperature of the conditioned air blown out to the rear air conditioning zones 3a and 103b, it is possible to cancel out that the occupants on the left side of the rear air conditioning zones (103a and 103b) feel hot due to solar radiation.

According to the second aspect of the present invention, there is provided solar radiation detecting means (33) for detecting the direction of solar radiation with respect to the vehicle, and when the determining means (S410) determines the absence of an occupant, the solar radiation detecting means (33). The temperature (TaoPa) of the conditioned air blown out to the absent-side air-conditioning zone (102a) is controlled in accordance with the direction of solar radiation detected by (1).

[0010] Thereby, the air conditioning zone (102
The air-conditioning air blown out to a) can suitably set the temperature of the air-conditioning zone (102a) on the absent side to a temperature corresponding to the uneven solar radiation.

By the way, the air conditioning zone (102
When a) is in the face blowing mode, compared to the other blowing modes, the conditioned air blown to the absent-side air-conditioning zone (102a) has the absent-side rear air-conditioning zone (103).
It becomes easy to flow to b). Therefore, the air conditioning zone (1
The degree to which the air-conditioning state of the absent-side rear air-conditioning zone (103b) is affected by the air-conditioning air blown out to 02a) is:
The air conditioning zone (102a) on the absent side is the largest in the case of the face blowing mode.

Therefore, as in the invention according to claim 3,
A face outlet (100D) that blows out conditioned air toward the upper body of the occupant in the front air conditioning zone (101a, 102a).
r, 100 Pa), and when the determination means (S410) determines that the occupant is absent, the air-conditioning zone (102
If the blowing mode of a) is set to the face blowing mode in which conditioned air is blown out from the face outlet (100 Pa), the absent-side rear air-conditioning zone (103b) is blown by the conditioned air blown out to the absent-side air-conditioning zone (102a). It is easy to control the air conditioning.

According to the fourth aspect of the present invention, there is provided a wind direction changing means for changing a blowing direction of the face air outlet (100 Pa), and when the determination means (S410) determines that an occupant is not present, the face air outlet (100 Pa) is provided. The air-conditioning means is controlled so that the conditioned air from 100 Pa) flows to the absent-side rear air-conditioning zone (103b) avoiding the passenger seat (102).
The air-conditioning air blown out to a) becomes easier to flow to the non-existing-side rear air-conditioning zone (103b). Therefore, it is possible to further easily control the air conditioning of the absent-side rear air conditioning zone (103b) by the conditioned air blown out to the absent-side air conditioning zone (102a).

Further, in the invention according to claim 5, when the determining means (S410) determines that the occupant is absent, the airflow of the conditioned air blown out to the absent air conditioning zone (102a) is increased. Since the air conditioner is a feature, the degree to which the air-conditioning state of the absent-side rear air conditioning zone (103b) is affected by the conditioned air blown out to the absent-side air conditioning zone (102a) can be further increased. Therefore, it is possible to further easily control the air conditioning of the absent-side rear air conditioning zone (103b) by the conditioned air blown out to the absent-side air conditioning zone (102a).

When the determining means (S410) determines that the occupant is absent, the air conditioning zone (102) on the absent side is determined.
The air-conditioned air blown out to a) is controlled irrespective of the set contents such as the set temperature of the air-conditioning zone (102a) on the absent side, and gives an occupant a feeling of strangeness.

On the other hand, in the invention according to claim 6,
When air-conditioning control is performed on the absent-side rear air-conditioning zone (103b) by air-conditioning air blown out to the absent-side air-conditioning zone (102a), the occupant is informed that this air-conditioning control is to be performed. Can be suppressed.

Further, according to the present invention, a right set temperature display means (106a) for displaying a set temperature of the right air conditioning zone (101a), and a left air conditioning zone (102).
a) the left-side set temperature display means (10) for displaying the set temperature
5a), and when the determination means (S410) determines that the occupant is absent, the right and left set temperature display means (1)
05a and 106a), the air conditioning zone (102
Since the display of the set temperature in a) is prohibited, the above-mentioned uncomfortable feeling for the occupant can be suppressed.

According to the present invention, there is provided a prohibition means capable of prohibiting air-conditioning control of the absent-side rear air conditioning zone (103b) by the conditioned air blown out to the absent-side air conditioning zone (102a). Features.

By the way, when the determination means (S410) determines that the occupant is absent, the control of the conditioned air blown out to the absent-side air conditioning zone (102a) determines the temperature difference between the right and left air conditioning zones (101a, 102a). It is conceivable that the noise increases with an increase in the amount of the conditioned air blown out to the absent-side air conditioning zone (102a). Therefore, when the degree of the increase in the temperature difference or the noise does not match the preference of the occupant, it is preferable to use the prohibiting means according to claim 8.

According to the ninth aspect of the present invention, the vehicle interior (10
0), the front air conditioning zone (101a, 102a) and the rear air conditioning zone (103a, 103b) are independently air-conditioned, and the driver air conditioning zone (101a) and the passenger air conditioning zone (102a) of the front air conditioning zone. A vehicle air-conditioning system that independently controls the air-conditioning of each of the vehicle air conditioners is provided with a setting means (108) that allows the occupants of the rear air-conditioning zones (103a, 103b) to set the control content of the passenger seat air conditioning zone (102a). It is characterized by the following.

As a result, the passenger seat air conditioning zone (102
If the occupant of a) is not present, the passenger seat air conditioning zone (10
2a) is controlled by the conditioned air blown out to the passenger seat air conditioning zone (102a).
a, 103b), if the air conditioning zone (103b) located behind the passenger seat air conditioning zone (102a) is set to be air-conditioned, even in the case of unbalanced sunlight, each of the left and right sides of the rear air-conditioning zone can be controlled. It is possible to realize that both the occupants can obtain a comfortable warm feeling without using the air distribution mechanism.

The reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)
The front (front) air conditioning zone and the rear (rear) air conditioning zone in the passenger compartment are independently air-conditioned, and the driver's (right) air conditioning zone and the passenger's (left) air conditioning zone of the front air conditioning zone are controlled separately. The present invention is applied to a vehicle air conditioner that controls air conditioning of zones independently. In the present embodiment, since the vehicle is described as a right-hand drive vehicle, the right side of the vehicle front seat in the vehicle interior is the driver's seat side, and the left side of the vehicle front seat in the vehicle interior is the passenger seat side.

FIGS. 1 to 8 show a first embodiment of the present invention. FIG.
01a, 102a, 103a, 103b, and the respective air conditioning zones 101a, 102a, 103a, 10a.
It is a schematic diagram which shows arrangement | positioning of the air outlet of conditioned air with respect to 3b. Reference numerals 100Dr, 100Pa, and 100Rr denote face air outlets for blowing conditioned air toward the upper body of the occupant (driver) in the driver's seat 101, the occupant in the passenger seat 102, and the occupant in the rear seat 103, respectively. And air outlets for blowing conditioned air to the passenger seat air conditioning zone 102a and the rear seat air conditioning zones 103a and 103b. Reference numeral 103a denotes a driver's seat rear air conditioning zone located behind the driver's seat air conditioning zone 101a in the rear seat air conditioning zone, and reference numeral 103b denotes a front passenger's seat located behind the passenger seat air conditioning zone 102a in the rear seat air conditioning zone. 2 shows a rear air conditioning zone.

FIG. 2 is an overall configuration diagram showing the overall configuration of the vehicle air conditioner of the present embodiment. This air conditioner has a driver air conditioning zone and a passenger air conditioning zone (hereinafter referred to as a front seat air conditioning zone). A front seat air conditioning unit 1 for independently air conditioning 101a and 102a, and a rear seat air conditioning unit 2 for air conditioning the driver rear air conditioning zone 103a and the passenger rear air conditioning zone 103b with the same air conditioning control value. It is composed of The front seat air conditioning unit 1 is arranged inside the instrument panel 104, and the rear seat air conditioning unit 2
Is disposed at the rear end of the vehicle interior 100.

The air conditioning unit 1 for a front seat has a duct 10 for sending air into the vehicle interior 100, and the following components are sequentially arranged in the duct 10 from upstream to downstream of the air flow. That is, an inside / outside air switching door 11 for switching between an inside air mode and an outside air mode by opening / closing an inside air introduction port 10a and an outside air introduction port 10b opened in the duct 10, a blower 12 for generating an air flow toward the vehicle interior 100, a refrigeration cycle (not shown) Evaporator 13 that cools air with refrigerant, heater core 14 that heats air, vehicle interior 1
An air mix door 15 for adjusting the temperature of the air blown at 00, and an air outlet switching door 16 for switching the air outlet mode to the front seat air conditioning zones 101a and 102a are provided.

In the duct 10, a partition plate 17 is provided in a downstream portion of the evaporator 13, so that the inside of the duct 10 is provided with a driver side face air outlet 100.
It is divided into a driver's seat side passage 10c that guides the air to Dr and a passenger seat side passage 10d that guides the air to the passenger seat side face air outlet 100Pa. The driver's seat side passage 10c The air mix door 15 and the outlet switching door 16 are provided in each of the passages 10c and 10d.

In FIG. 2, the foot outlet and the defroster outlet are omitted, but each outlet is opened in each of the driver's seat side and the passenger's seat side passages 10c and 10d. It is opened and closed by a switching door. The outlet mode includes a well-known face mode, defroster mode, foot mode, bi-level mode, foot differential mode, and the like.

The rear seat air-conditioning unit 2 has a duct 20 for sending air into the vehicle interior 100. In the duct 20, the following components are arranged in order from upstream to downstream of the air flow. That is, a blower 22 that generates an airflow toward the vehicle interior 100, an evaporator 23 that cools the air with a refrigerant of a refrigeration cycle (not shown), a heater core 24 that heats the air, and an air mix door that regulates the temperature of the air blown into the vehicle interior 100. 25, rear air conditioning zone 103
a, an air outlet switching door 26 for switching the air outlet mode to 103b.

Although the foot outlet and the defroster outlet are omitted in FIG. 2, each outlet is opened in the duct 20, and can be opened / closed by an outlet switching door (not shown). I have. Further, only the inside air from the inside air introduction port 20a is introduced into the duct 20, and the inside air circulation mode is always set. The outlet mode includes a well-known face mode, foot mode, and bi-level mode.

The operation of the air conditioning unit 1 for the front seat and the air conditioning unit 2 for the rear seat having the above-described configuration is controlled by a common air conditioning control device (hereinafter, referred to as an air conditioning ECU) 3.

The input signal to the air conditioner ECU 3 includes the outside air temperature Ta outside the cabin detected by the outside air temperature sensor 31.
m, the engine coolant temperature Tw detected by the coolant temperature sensor 32, and the driver-side and passenger-side insolation TsD detected by the insolation sensor (insolation detecting means) 33.
r, TsPa, inside air temperature sensor 3 for front seat and rear seat
Front and rear seat air conditioning zones 1 detected by 4 and 35
01a, 102a, 103a, 103b inside air temperature Tr
Front and rear seat evaporators 13, 23 detected by Fr, TrRr, and post-evaporation temperature sensors 36, 37
Air temperature immediately after (hereinafter referred to as post-evacuation temperature) TeFr,
TeRr, a seating signal detected by the passenger seating sensor 38 for detecting whether the occupant is sitting (riding) in the passenger seat 102, the driver seat 101, the passenger seat 102, and the rear seat 103.
Temperature setting means (left and right control value setting means) 105, 106 for setting the air temperature of the driver side, the passenger side, and the rear air conditioning zones 101a, 102a, 103a, 103b to desired temperatures. Set temperature T from 107
setDr, TsetPa, TsetRr and the like.

The insolation sensor 33 is a well-known 2D insolation sensor disposed at a substantially central portion in the vehicle left-right direction inside the front window, and has an insolation T from the driver's seat side.
Sensor for detecting sDr and solar radiation TsP from the passenger seat side
and a sensor for detecting a.

The seating sensor of this embodiment employs a well-known infrared sensor. The seating sensor is composed of two infrared sensors for detecting the driver seat side and the passenger seat side of the rear seat 103, respectively. I have. In the vicinity of the temperature setting means 105, 106, 107, displays (set temperature display means) 105a, 106 for displaying the contents of each setting.
a, 107a.

On the other hand, the air conditioner ECU 3 performs predetermined arithmetic processing based on the input signal and outputs a control signal to each of the following actuators. The output signal from the air conditioner ECU 3 includes a servo motor 11a for driving the inside / outside air switching door 11, drive motors 12a and 22a for driving the blowers 12, 22, and a compressor for sucking, compressing, and discharging the refrigerant of the refrigeration cycle. Electromagnetic clutch, an electromagnetic valve for interrupting the refrigerant flow on the upstream side of the refrigerant flow of the evaporators 13 and 23, servomotors 15a and 25a for driving the air mix doors 15 and 25, an outlet switching door 16,
Signals for controlling the operation of the servo motors 16a and 26a for driving the motor 26 are provided.

FIG. 3 shows a flowchart of a program executed by the air conditioner ECU 3, and the contents of the flowchart will be described below.

First, initialization (reset) of data, flags, and the like is performed (step S1). Then, the set temperatures TsetDr, T
read setPa and TsetRr (step S
2). Then, from the above-described sensors, the outside air temperature Tam,
Cooling water temperature Tw, solar radiation TsDr, TsPa, inside air temperature TrFr, TrRr, post-evaporation temperature TeFr, TeRr,
The seating signal detected by the passenger seating sensor 38 is read (step S3).

Next, the driver's seat side and passenger's side face air outlets 100 Dr, 100 P are provided by the front seat air conditioning unit 1.
a, the driver's seat target air temperature TaoDr, which is the air conditioning control value of the air-conditioning air blown from a, and the passenger seat target air temperature TaoPa.
Is calculated. Further, a rear seat target outlet temperature (air conditioning control value) TaoRr of the conditioned air blown out from the outlet 100Rr by the rear seat air conditioning unit 2 is calculated (step S).
4). This calculation method will be described later in detail with reference to the flowchart of FIG.

Next, the inside / outside air mode of the front seat air conditioning unit 1 is determined from the characteristic diagram of FIG. 4 based on TaoDr and TaoPa calculated in step S4 (step S5). In FIG. 4, SW1 is the inside / outside air switching door 11
Target opening, and in the present embodiment, the inside air inlet 1
The target opening degree SW1 is set to 100% in a case where 0a is fully closed and the outside air inlet 10b is fully opened.

Next, based on the TaoDr, TaoPa, and TaoRr calculated in step S4, the driver-side and passenger-side outlet modes of the front seat air conditioning unit 1 are determined from the characteristic diagram of FIG. At the same time, the mode in the air outlet of the rear seat air conditioning unit 2 is determined (step S6).

Next, based on the TaoDr, TaoPa, and TaoRr calculated in step S4, the drive motor 12a for the blowers 12, 22 of the front and rear air conditioning units 1, 2 is obtained from the characteristic diagram of FIG. , 22a to be applied to the blower 12,
A predetermined air volume is generated at 22 (step S7). The blower voltage to the drive motor 12a of the front seat air-conditioning unit 1 is obtained by averaging the blower voltages respectively determined by the characteristic diagram of FIG. 6 based on TaoDr and TaoPa.

Next, based on the TaoDr and TaoPa calculated in step S4, the target opening degrees θDr, θPa of the air mix door 15 of the front seat air conditioning unit 1 are calculated.
Is calculated by the following equation (1). Further, the target opening degree θRr of the air mix door 25 of the rear seat air conditioning unit 2 is set to Ta.
It is calculated based on oRr by the equation (2) (step S
8).

[0043]

[Equation 1] θ (i) = ｛(Tao (i) −TeFr) /
(Tw-TeFr)｝ × 100 (%) where i is Dr or Pa.

[0044]

## EQU2 ## θRr = ｛(TaoRr-TeRr) / (Tw
−TeRr)｝ × 100 (%) Next, a signal for controlling the operation of the above-described various output motors and the like is output so that the air conditioning control state determined or calculated in steps S4 to S8 described above is achieved ( Step S9). Then, it is determined whether a predetermined control cycle time (t) has elapsed (step S10). If the result of the determination is YES, the process returns to step S2, and if the result of the determination is NO, the control waits for the elapse of the control cycle time (t).

Here, in step S4, Ta is calculated by steps S410 to S480 shown in the flowchart of FIG.
oDr, TaoPa, and TaoRr are calculated, and a method of calculating these will be described below with reference to FIG.

First, it is determined whether or not an occupant in the passenger seat 102 is absent based on the seating signal of the passenger seating sensor 38 (step S410 (determination means)). And the passenger seat 1
When it is determined that the occupant is in the vehicle at 02, the rear target air outlet temperature TaoRr is calculated in step S420 based on the equation of Expression 3, and it is determined that the occupant in the passenger seat 102 is absent. In this case, in step S450, the rear-seat target outlet temperature TaoRr is calculated based on the equation (3).

[0047]

## EQU3 ## TaoRr = KsetRr.TsetRr-K
rRr ・ TrRr-Kam ・ Tam-KsRr ・ Ts ′
+ C + f (j) where KsetRr is the rear seat temperature setting gain, KrRr
Is the inside air temperature gain for the rear seat, Kam is the outside air temperature gain, KsR
r is the solar gain for the rear seat, Ts' is the amount of solar radiation to be described later, C is a correction constant, and f (j) is the front seat air conditioning zones 101a and 102.
The variable j is a correction function that determines a correction gain according to the air conditioning state (described later), and the variable j is a variable that changes according to the determination result of step S410.

Then, Ts ′ in the equation (3) is calculated by the step S
At 420, the average value of the driver's seat side solar radiation amount TsDr and the passenger seat side solar radiation amount TsPa ((TsDr + TsPa) / 2) is set, and at step S450, the driver's seat side solar radiation amount TsDr is set. Thereby, when the occupant in the front passenger seat 102 is absent, the rear target air outlet temperature TaoR is set so that the occupant in the driver's seat rear air conditioning zone 103a can obtain a comfortable feeling of heat.
r is corrected for solar radiation.

The correction by the correction function f (j) is a temperature correction for canceling the influence of the air conditioning of the rear air conditioning zones 103a and 103b from the air conditioning of the front air conditioning zones 101a and 102a. f (j) is based on the following polynomial equation (4).

[0050]

F (j) = α · ((TPAI + β) / (100
+ Β)) · (TsetRr-j) where α is a temperature correction coefficient, TPAI is a first inside / outside air correction coefficient, and β is a second inside / outside air correction coefficient.

The variable j is set to the average value of TsetDr 'and TsetPa' ((TsetDr '+ TsetPa') / 2) described later in step S420.
In step S450, TsetDr 'is set. As a result, the rear-seat target outlet temperature TaoRr becomes 10
When the second occupant is absent, the rear-seat target outlet temperature TaoRr is temperature-corrected so that the occupant in the driver's seat rear air conditioning zone 103a can obtain a comfortable feeling of heat.

Here, TsetDr 'is TsetD
This is a value corrected by a relaxation process (for example, a time constant process) for the detected value (raw value) of r. More specifically, the relaxation process is a process for changing the value of TsetDr exponentially with respect to time when the value of TsetDr changes abruptly. This is a process for preventing instability of the data. The time constant τ is a time (second) until the change amount of TsetDr ′ reaches 63.2% of the change amount of TsetDr. In the present embodiment, the time constant τ is 3
0 seconds.

Incidentally, the front air conditioning zones 101a, 10a
Rear seat air-conditioning zones 103a and 103 according to the air-conditioning state of 2a
The effect of b on the air-conditioning state depends on the state of the front-seat outlet mode. In particular, the air-conditioning air blown out in the face mode has a greater effect on the air-conditioning state of the rear air-conditioning zones 103a and 103b than the air-conditioning air in the other modes. Focusing on this point, the value of α is changed according to the state of the air conditioning unit 1 for the front seat in the outlet mode. Specifically, the face mode (for example, α = 5.
0), foot mode (eg, α = 2.5), foot differential mode and defroster mode (eg, α = 1.0),
The value of α is increased in the order of the bilevel mode (for example, α = 0.75).

Generally, in the outside air mode, outside air introduced from the front of the vehicle is discharged from the rear of the vehicle. Therefore, in the case of the outside air mode, the front air conditioning zones 101a, 10a
Rear seat air-conditioning zones 103a and 103 according to the air-conditioning state of 2a
The influence of b on the air-conditioning state is increased. Focusing on this point,
The value of TPAI is made larger as the inside / outside air switching door 11 approaches the whole outside air mode where SW1 = 100% from the whole inside air mode where SW1 = 0%. FIG. 8 is a characteristic diagram showing the relationship between the target opening degree SW1 of the inside / outside air switching door 11 and TPAI, and the value of TPAI is changed according to this characteristic diagram.

Β is a TPAI correction function f (j).
Is a correction coefficient for determining the weight for .beta., And in the present embodiment, .beta. = 488 based on experimental values. In the calculation of α and TPAI, the change in the outlet mode and the target opening degree SW1 is corrected by the above-described mitigation processing (for example, time constant processing). This prevents the air conditioning state from becoming unstable due to a sudden change in the correction function f (j).

Next, when it is determined that the occupant is in the passenger seat 102, the target blowing temperatures TaoDr, TaoPa of the driver's seat and the passenger's seat are determined in steps S430 and S440 based on the formula of equation (5). calculate.

[0057]

## EQU5 ## Tao (i) = Kset (i) .Tset
(I) -KrFr-TrFr-Kam-Tam-Ks
(I) · Ts (i) + C + K (i) where i is Dr or Pa, Kset is a temperature setting gain, Kr is an inside temperature gain, Kam is an outside temperature gain, and Ks
Is a solar radiation gain, and C is a correction constant. K (i) is the driver's seat air conditioning zone 101a and the passenger seat air conditioning zone 10a.
This is a correction gain specific to 2a. Specifically, the outside air temperature T
The correction coefficients K1 and K2 according to am are determined according to the characteristic diagrams of FIGS. 9A and 9B obtained by experiments, and the correction gain K (i) is calculated based on the equations of equations 6 and 7. are doing.

[0058]

KDr = K1 (TsetDr−TsetPa)

[0059]

KPa = K2 (TsetPa−TsetDr) On the other hand, when it is determined that the occupant in the passenger seat 102 is absent, the driver's seat target outlet temperature TaoDr is calculated in step S460 based on the equation (5). I do. Then, in steps S470 and S480, the conditioned air blown out to the passenger seat air conditioning zone 102a is mixed with the conditioned air blown out to the passenger seat rear air conditioning zone 103b to appropriately correct the sunshine in the passenger seat rear air conditioning zone 103b. In such a manner, the target outlet temperature TaoPa of the passenger seat is calculated. That is, the target air outlet temperature TaoPa for the passenger seat is calculated so that the occupant in the passenger seat rear air-conditioning zone 103b can obtain a comfortable warm feeling.

More specifically, the target outlet temperature TaoPa for the front passenger seat is calculated in accordance with the ratio (the direction of insolation) between the driver's seat side solar radiation TsDr and the front passenger seat solar radiation TsPa. 7, the solar radiation gain KsPa is determined based on the ratio between the driver's seat side solar radiation amount TsDr and the passenger seat side solar radiation amount TsPa, and in step S480, the KsPa of the equation (5) is obtained. To the solar radiation gain KsPa determined in step S470. The characteristic diagram shows the amount of solar radiation TsD from the driver's seat side.
As the value of r increases, the solar radiation gain KsPa decreases, and as the amount of solar radiation TsPa from the passenger seat increases, the solar radiation gain KsPa increases.
This is to increase sPa.

In step S480, the value of TsetRr is substituted for Tset (i) in equation (5), and
A target passenger seat target outlet temperature TaoPa is calculated based on tRr.

Next, the operation of the front-seat air conditioning unit 1 and the rear-seat air conditioning unit 2 having the above configuration will be briefly described.

First, the operation of the front seat air conditioning unit 1 will be described. Based on the determinations made in steps S5, S6, S7, and S8, the inside / outside air switching door 11, the driver's seat side and the passenger's seat side air outlet switching are performed. The door 16, the blower 12, and the air mix doors 15 on the driver's seat side and the passenger's seat side are driven.

Thus, air is introduced into the duct 10 from the inside air inlet 10a and the outside air inlet 10b. The air flowing through the duct 10 exchanges heat with the refrigerant when passing through the evaporator 13 and is cooled. Here, based on the detected values of the post-evaporation temperatures TeFr, TeRr, etc.
By controlling the number of revolutions of the compressor by the CU3, the flow rate of the refrigerant flowing in the refrigeration cycle is controlled,
The cooling performance of the evaporator 13 is adjusted. The air cooled by the evaporator 13 is heated by exchanging heat with engine cooling water when passing through the heater core 14. The ratio of the air passing through the heater core 14 and the air bypassing the heater core 14 is adjusted by the air mix door 15, and the conditioned air that is independently adjusted to the predetermined temperature on the left and right sides is supplied to the driver's seat side and the passenger's seat side. Each outlet 10
It is blown out from 0Dr and 100Pa.

Next, the operation of the rear seat air conditioning unit 2 will be described. Based on the determinations made in steps S6, S7 and S8, the respective air outlet switching doors 26, the blower 22, and the air mix door 25 are driven. And the front seat air conditioning unit 1
The conditioned air adjusted by the same method as described above is blown out from the outlet 100Rr on the rear seat side.

As described above, when the determination means S410 determines that the occupant in the passenger seat 102 is absent, the rear target air outlet temperature TaoRr is set so that the occupant in the air conditioning zone 103a behind the driver's seat can obtain a comfortable feeling of warmth. Has been corrected for solar radiation, so that the occupant in the driver's seat rear air conditioning zone 103a has a comfortable feeling of warmth regardless of the presence or absence of unbalanced solar radiation due to the conditioned air blown out from the right side of the rear-seat side air outlet 100Rr. Obtainable.

On the other hand, the conditioned air blown out to the passenger seat air conditioning zone 102a mixes with the conditioned air blown out to the passenger seat rear air conditioning zone 103b, and the passenger seat rear air conditioning zone 1
Since the passenger seat target outlet temperature TaoPa is calculated so as to appropriately correct the solar radiation of the passenger seat 03b, the occupant in the passenger seat rear air conditioning zone 103b has a rear outlet side air outlet 100b.
The air-conditioning air blown out from the left side of Rr and the air-conditioning air blown out to the passenger seat air-conditioning zone 103b and blown toward the passenger seat air-conditioning zone 102b can provide a comfortable warm feeling regardless of the presence or absence of polarized sunshine. it can.

Therefore, the occupants on the left and right sides of the rear air conditioning zones 103a and 103b can obtain comfortable warmth regardless of the presence or absence of unbalanced solar radiation by using the air distribution mechanism of the conventional air conditioner. Therefore, it is possible to reduce the manufacturing cost and increase the size of the air conditioner.

(Second Embodiment) In this embodiment, a setting switch (setting means) 108 capable of setting the control content of the passenger seat air conditioning zone 102a is provided near the rear seat 103 (for example, FIG. 1).
(The position at the rear of the center console, as indicated by the one-dot chain line). When the setting switch 108 is operated, the passenger in the rear seat 103 enters a passenger seat setting operation mode in which the control content of the passenger seat air conditioning zone 102a is set.

FIG. 10 is a flow chart showing the present embodiment, where TaoDr, which corresponds to step S4 in FIG.
TaoPa and TaoRr are calculated.

In step S415, setting switch 108
When the passenger seat setting operation mode is selected by the operator, steps S450 and S460 similar to those in the first embodiment are performed.
Then, the rear seat target outlet temperature TaoRr and the driver seat target outlet temperature TaoDr are calculated.

Then, in step S490, the setting switch 10 is added to Tset (i) of the equation (5) of the first embodiment.
8, the value of the set temperature TsetPaRr of the passenger seat air-conditioning zone 102a set by
Is calculated on the basis of the target air temperature TaoPa.

On the other hand, when the passenger seat setting operation mode is not selected, the same step S42 as in the first embodiment is performed.
0, S430, and S440, each target outlet temperature TaoR
Calculate r, TaoDr, and TaoPa.

When the occupant in the passenger seat air conditioning zone 102a is absent, the conditioned air blown out to the passenger seat air conditioning zone 102a is supplied to the passenger seat rear air conditioning zone 103b.
The set temperature Ts is adjusted so as to mix the air-conditioning air blown out to the rear-side air-conditioning zone 103b of the passenger seat appropriately to correct the solar radiation.
If etPaRr is set, as in the first embodiment, the occupant in the passenger seat rear air conditioning zone 103b is blown out from the left side of the rear seat side air outlet 100Rr and blows out to the passenger seat air conditioning zone 102a. By the conditioned air flowing toward the passenger seat rear air conditioning zone 103b, a comfortable warm feeling can be obtained irrespective of the presence or absence of unbalanced solar radiation.

(Third Embodiment) In the present embodiment, in the first embodiment, when the determination means S410 determines that the occupant is absent, the blowing mode of the passenger seat air conditioning zone 102a is changed from the face air outlet 100Pa to the conditioned air. In the face blowing mode. This makes it easier for the conditioned air blown out to the passenger seat air conditioning zone 102a to flow to the passenger seat rear air conditioning zone 102a. Therefore, the conditioned air blown out to the passenger seat air conditioning zone 102a can be easily mixed with the conditioned air blown out to the passenger seat rear air conditioning zone 103b to easily correct the solar radiation in the passenger seat rear air conditioning zone 103b properly.

The passenger side face air outlet 100Pa
On the other hand, in an air conditioner having a louver (wind direction changing means) for changing the blowing direction, when the determination means S410 determines that the occupant is absent, the passenger side face face outlet 100P
If the direction of the louver is controlled so that the conditioned air from a flows to the passenger seat rear air conditioning zone 103b while avoiding the passenger seat 102, the conditioned air blown out to the passenger seat air conditioning zone 102a can be used. It is easier to flow into the zone 103b, which is preferable.

When the determination means S410 determines that the occupant is absent, if the amount of conditioned air blown to the passenger seat air conditioning zone 102a is increased, the conditioned air blown to the passenger seat air conditioning zone 102a is increased. Thus, the degree to which the air conditioning state of the passenger seat rear air conditioning zone 103b is affected can be further increased, which is preferable.

(Fourth Embodiment) In this embodiment, the rear seat 1
An operation panel (not shown) having operation means for setting the operation of the rear seat air conditioner 2 is provided near the position 03 (for example, the position indicated by the dashed line in FIG. 1), and the operation panel includes rear air conditioning zones 103a and 103b. Temperature setting means 107 for setting the set temperature TsetRr of the second embodiment and the setting switch 108 of the second embodiment. Thereby, the operability of the air conditioner by the rear passenger can be improved.

In the first embodiment, when the determination means S410 determines that the occupant is absent, the conditioned air blown out to the passenger seat air conditioning zone 102a changes the passenger seat target regardless of the set temperature TsetPa on the passenger seat side. Outlet temperature T
Since aoPa is calculated, the occupant feels strange.

Then, the conditioned air blown out to the passenger seat air conditioning zone 102a generates the passenger seat rear air conditioning zone 103b.
If the passenger's seat target outlet temperature TaoPa is calculated so as to control the air conditioning of the passenger, the occupant is notified by displaying on the displays 105a, 106a, and 107a described in the first embodiment. Discomfort to the user can be suppressed.

In the first embodiment, the determination means S
If 410 determines that the occupant is absent, the display of the passenger seat set temperature TsetPa on the display 105a is prohibited, so that the above-described discomfort to the occupant can be suppressed.

(Fifth Embodiment) In the present embodiment, there is provided a prohibition means capable of prohibiting the air conditioning control of the passenger seat rear air conditioning zone 103b by the conditioned air blown out to the passenger seat air conditioning zone 102a in the first embodiment. . This prohibiting means is to calculate the passenger seat target outlet temperature TaoPa in step S440 irrespective of the judgment of the judging means S410. Thereby, the determination means S410
If the control of the conditioned air blown out to the passenger seat air-conditioning zone 102a when determining that the occupant is absent does not match the occupant's preference, the calculation of the passenger seat target outlet temperature TaoPa in step S480 can be prohibited, which is preferable. is there.

(Sixth Embodiment) In the first embodiment, an infrared sensor is employed as a seating sensor. However, the present invention is not limited to this.
A pressure sensor provided in the second and the third 103 may be employed.
Alternatively, a seating signal may be output by wearing a seat belt. In addition, each seat 101, 10
The presence or absence of an operation on a seat switch for setting the state of 2, 103 (for example, the angle of the backrest portion) according to the occupant's preference may be used as the seating signal. Each of the temperature setting means 105, 106, 107 and the priority setting switch 10
The presence or absence of the setting operation by 8 may be used as the seating signal. Further, a voice signal based on the voice of the occupant may be used as the seating signal. Further, an opening / closing signal by opening / closing the door for getting on / off may be used as the seating signal. Further, the presence or absence of the image of the occupant by the image detecting means may be used as the seating signal.

(Seventh Embodiment) In the first embodiment, each target blowout temperature TaoRr, TaoDr, TaoPa is corrected for insolation based on the detection values TsDr, TsPa of the same insolation sensor 33. 2D for rear seats at the rear side of 100 (for example, at the rear of the center console)
The solar radiation sensor 33 is added, and the rear target air outlet temperature TaoR
r is the detected value TsDr, Ts of the rear 2D solar radiation sensor 33
The accuracy of the solar radiation correction of the rear seat target outlet temperature TaoRr may be enhanced by performing the solar radiation correction based on Pa.

The solar radiation detecting means 33 is not limited to the 2D solar radiation sensor. For example, a 1D solar radiation sensor may be provided on the right and left sides of the vehicle interior 100. The detection values of the solar radiation amounts TsDr and TsPa from the right and left sides by the solar radiation detecting means 33 are estimated from the direction of solar radiation based on information from the vehicle navigation system and the solar radiation amount by at least one 1D solar radiation sensor. It may be a value.

(Eighth Embodiment) In this embodiment, a detecting means for detecting the position of the sun with respect to the vehicle is provided.
The degree of insolation correction of the air-conditioning control value TaoRr is increased. Thus, the air conditioning control value TaoRr can be appropriately corrected for solar radiation according to the change in the amount of solar radiation received by the occupant due to the change in the solar radiation angle with respect to the vehicle.

(Other Embodiments) In the first embodiment, the present invention is applied to an air conditioner that independently air-conditions two front and rear air-conditioning zones. The present invention may be applied to an air conditioner that independently air-conditions a plurality of air conditioning zones divided in the front-rear direction as employed in an air conditioner of a vehicle having the air conditioner.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an arrangement of air-conditioned air outlets according to a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram illustrating an overall configuration of the vehicle air conditioner according to the first embodiment.

FIG. 3 is a flowchart of a program executed by an air conditioner ECU according to the first embodiment.

FIG. 4 is a characteristic diagram illustrating a relationship between Tao and an inside / outside air mode according to the first embodiment.

FIG. 5 is a characteristic diagram showing a relationship between Tao and an outlet mode in the first embodiment.

FIG. 6 is a characteristic diagram showing a relationship between Tao and a blower voltage in the first embodiment.

FIG. 7 is a flowchart showing details of a part of the flowchart of FIG. 3;

FIG. 8 is a characteristic diagram illustrating a relationship between a target opening degree SW1 of the inside / outside air switching door and a second inside / outside air correction coefficient in the first embodiment.

FIG. 9A illustrates a correction coefficient K1 according to the first embodiment.
FIG. 6 is a characteristic diagram showing a relationship between the temperature and the outside air temperature, and FIG.
FIG. 7 is a characteristic diagram showing a relationship between a correction coefficient K2 and an outside air temperature Tam.

FIG. 10 is a flowchart illustrating a method for calculating target blow-out temperatures TaoDr, TaoPa, and TaoRr according to the second embodiment of the present invention.

[Description of Signs] 100: vehicle interior, 101a: driver air conditioning zone, 102
a ... passenger seat air conditioning zone, 103a ... driver seat rear air conditioning zone, 103b ... passenger seat rear air conditioning zone, 108 ... setting switch, S410 ... judgment means, TaoPa ... passenger seat target outlet temperature, TaoRr ... rear seat target outlet temperature.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B60H 1/34 671 B60H 1/34 671B

Claims (9)

[Claims] 1. A front air conditioning zone (1) in a vehicle interior (100).
01a, 102a) and rear air conditioning zones (103a, 10a).
3b), wherein the right and left air conditioning zones independently control the air conditioning of the front air conditioning zone, and independently control the air conditioning of the right air conditioning zone (101a) and the left air conditioning zone (102a) of the front air conditioning zone. (101a, 102a)
A determination means (S410) for determining whether or not the occupant of at least one of the air conditioning zones is absent; and when the determination means (S410) determines that the occupant is absent, the air conditioning zone (102a) on the absent side is determined. The blown conditioned air causes the rear air conditioning zone (103a, 103
An air conditioner for a vehicle, characterized in that air conditioning control is performed on an absent-side rear air conditioning zone (103b) located behind the absent-side air conditioning zone (102a) in the b). 2. A solar radiation detecting means (33) for detecting the direction of solar radiation with respect to a vehicle, and when the determining means (S410) determines the absence of an occupant, the solar radiation detected by the solar radiation detecting means (33). The air conditioner for a vehicle according to claim 1, wherein an outlet temperature (TaoPa) of the conditioned air blown out to the absent-side air conditioning zone (102a) is controlled in accordance with a direction of the air conditioner. 3. The front air conditioning zone (101a, 102a).
a) a face outlet (100 Dr, 100 Pa) for blowing out conditioned air toward the upper body of the occupant; and if the determination means (S410) determines that the occupant is absent, the air conditioning zone (102a) on the absent side is The vehicle air conditioner according to claim 1 or 2, wherein the blow mode is a face blow mode in which conditioned air is blown from the face blow port (100Pa). 4. An air flow changing means for changing a blowing direction of the face air outlet (100 Pa), and conditioned air from the face air outlet (100 Pa) when the judging means (S410) judges the absence of an occupant. The vehicle air conditioner according to claim 3, wherein the airflow direction variable means is controlled such that the airflow flows into the absent-side rear air-conditioning zone (103b) while avoiding a passenger seat (102). 5. When the determining means (S410) determines that an occupant is absent, the air conditioning zone (102) on the absent side is determined.
The vehicle air conditioner according to any one of claims 1 to 4, wherein the amount of the conditioned air blown out in a) is increased. 6. When air-conditioning control is performed on the absent-side rear air-conditioning zone (103b) by air-conditioning air blown out to the absent-side air-conditioning zone (102a), a notification to the effect that the air-conditioning control is to be performed is given to an occupant. 6. The method according to claim 1, wherein:
The vehicle air conditioner according to any one of the above. 7. A right set temperature display means (106a) for displaying a set temperature of the right air conditioning zone (101a), and a left set temperature display means (105a) for displaying a set temperature of the left air condition zone (102a). When the determination means (S410) determines that the occupant is absent, the right and left set temperature display means (105a,
The vehicle air conditioner according to any one of claims 1 to 6, wherein displaying a set temperature of the absent-side air conditioning zone (102a) on (106a) is prohibited. 8. An absent means which can inhibit air-conditioning control of the absent-side rear air-conditioning zone (103b) by conditioned air blown out to the absent-side air-conditioning zone (102a). 6. The vehicle air conditioner according to any one of 1 to 5. 9. A front air conditioning zone (1) in a vehicle interior (100).
01a, 102a) and rear air conditioning zones (103a, 10a).
3b), respectively, and independently controls the air conditioning of the driver air conditioning zone (101a) and the passenger seat air conditioning zone (102a) of the front air conditioning zone. An air conditioner for a vehicle, comprising: setting means (108) capable of setting a control content of a zone (102a) by an occupant of the rear air conditioning zone (103a, 103b).