JP3454189B2 - Vehicle air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner mounted on an automobile or the like, and more particularly to a vehicle air conditioner which improves various air conditioning efficiency in air volume distribution control for front seats and rear seats.

[0002]

2. Description of the Related Art Conventionally, as a vehicle air-conditioning system, there is, for example, a "blow-out device for cold air or outside air in an automobile" disclosed in Japanese Utility Model Publication No. 55-175512. In this prior art, a plurality of front seat outlets 1501 are provided at a low position of the instrument panel 104 so as to open with a duct 1601 directed straight rearward. Further, a rear seat outlet 1052 is provided at a high position above the front seat outlet 1501 so as to have a duct 1602 facing obliquely upward to the roof side and open horizontally in the vehicle left-right direction.

Inside the instrument panel 104, the ducts 1604 from the air conditioning unit 1603 are ducts 1601 and 160 of the air outlets 1501 and 1502.
An air volume distribution door 1605 is provided in the duct 1604, which communicates with the duct 2. As a result, the conditioned air is blown upward from the rear weir outlet 1502, and this airflow is sent to the rear seats through the upper space between the front seat occupant and the roof. Further, it is disclosed that the air volume distribution door 1605 enables the air volume distribution adjustment to the front and rear seats.

[0004]

However, in the above-mentioned "blow-out device for cold air or outside air in a vehicle", even if the air volume distribution door 1605 is controlled, the temperature is adjusted independently in front and rear. There was a problem that it was difficult.

The present invention has been made in view of this point, and an object of the present invention is to appropriately control the air volume distribution of the front and rear seats to improve the air conditioning efficiency and the like on the rear seat side.

[0006]

In order to achieve the above object, the present invention comprises control means for controlling the entire apparatus on the basis of the front seat thermal environment condition and / or the rear seat thermal environment condition. Is a front and rear seat signal selecting means for selecting a larger difference between the room temperature of the front and rear seats and the set room temperature, and a target outlet air temperature calculation for calculating a target outlet air temperature using the signals selected by the front and rear seat signal selecting means. Means, calculating the air mix door opening based on the target blown air temperature calculated by the target blown air temperature calculating means, and an air mix door opening calculating means for outputting a door opening signal to the air mix door, The fan voltage calculation means for calculating the overall fan applied voltage based on the difference between the detected room temperature of the front and rear seats and the set room temperature, and the fan voltage calculation means for controlling the motor voltage of the blower fan. An air conditioner for a vehicle equipped with an air volume distribution door opening calculation means for calculating the air volume distribution door openings of the front and rear seats based on the fan voltage ratios of the front and rear seats calculated by It is provided.

Further, the front and rear seat signal selecting means determines whether the front and rear seats are excessive or steady based on the difference between the room temperature of the front and rear seats and the set room temperature. Is to be selected.

(Operation) In the air conditioning control of the vehicle air conditioner according to the present invention, one having a large difference between the room temperature of the front and rear seats and the set room temperature is selected, and the target blown air temperature is calculated using the selected signal, Air mix door opening, fan applied voltage,
Calculate the air volume distribution door opening.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings. First, Fig. 1
The structure of the front and rear seats will be described with reference to FIG. In the case of a general passenger car, a front seat 102 and a rear seat 103 are arranged inside a vehicle body 100, an instrument panel 104 is arranged in the entire vehicle left-right direction in front of the front seat, and an instrument panel 104 is arranged. An air conditioner 110 is housed in the interior of the.

The air conditioner 110 is, for example, four front seat air outlets 111 and one rear seat air outlet 1 arranged to be opened in the instrument panel 104 as shown in FIG.
12 and. Further, the duct 113 from the air conditioning unit 130 communicates with the ducts 114 and 115 that branch into two branches, and one duct 114 communicates with the front seat outlet 111,
The other duct 115 communicates with the rear seat outlet 112. An air volume distribution door 116 that changes the air volume distribution is provided at the branch portions of the ducts 114 and 115.

The outlet 111 is opened at a low position of the instrument panel 104, and its duct 114 is arranged substantially horizontally so as to face the chest of the front seat occupant. The rear seat air outlet 112 is a central portion of the instrument panel 104, which is located at a position higher than the front seat air outlet 111, and has a horizontally long opening within a range in which the air current does not hit the front seat occupants. And
The duct 115 has a shape that is convexly curved upward in a state where it is directed straight to the rear of the vehicle, and the airflow A that blows out from the duct 115.
Is formed so as to reach the chest of the rear seat occupant when it is sent to the rear seat.

On the other hand, an outside air temperature sensor 120 for detecting the outside air temperature is provided outside the vehicle body 100, and an insolation sensor 121 for detecting the amount of insolation is provided above the instrument panel 104.
Is provided. Further, a front seat room temperature sensor 122 and a front seat room temperature setting device 123 are provided under the feet of the front seat passengers, and a rear seat room temperature sensor 124 and a rear seat room temperature competition 125 are provided under the feet of the rear seat passengers. .

Referring to FIG. 3, the air conditioning unit and the control system will be described. The air conditioning unit 13 is the main duct 331.
The blower fan 332 is provided inside the main duct 331. An intake door 333 is arranged upstream of the blower fan 332, and an evaporator 334, an air mix door 335, a heater core 3 are arranged downstream thereof.
36 are arranged respectively. The air mix chamber 337 communicates with the front seat outlet 111 and the rear seat outlet 112 via the ventilator door 338 and the duct 113.

The control section 340 as a control means includes front and rear seat signal selection means 341 and target blown air temperature calculation means 34.
2, the air mix door opening degree calculating means 343, the fan voltage calculating means 344, and the air volume distribution door opening degree calculating means 345. The front and rear seat signal selection means 341 includes the outside air temperature sensor 120, the solar radiation sensor 121, the front seat room temperature sensor 122, the rear seat room temperature sensor 124, and the front seat room temperature setter 12.
3. The difference between the detected room temperature of the front and rear seats and the set room temperature is obtained by the input signal from the rear room room temperature setting device 125, and the larger signal is selected to be used. The target outlet air temperature calculating means 342 calculates the target outlet air temperature using the signal of the difference between the detected room temperature selected by the front and rear seat signal selecting means 341 and the set room temperature.

Air mix door opening calculation means 343
Calculates the air mix door opening based on the target blown air temperature calculated by the target blown air temperature calculating means 342, and outputs a door opening signal to the actuator 346 of the air mix door 335. Fan voltage calculation means 3
Reference numeral 44 calculates the overall fan applied voltage based on the difference between the detected room temperature of the front and rear seats and the set room temperature, and controls the voltage of the motor 339 in the blower fan 332. The air volume distribution door opening calculation means 345 calculates the air volume distribution door openings of the front and rear seats from the fan voltage ratio of the front and rear seats, and outputs the door opening signal as the air volume distribution door 1.
It outputs to 16 actuators 347.

Next, the operation of this embodiment will be described. First, when the air conditioner is used in the vent mode, the conditioned air generated in the air conditioning unit 130 is guided to the duct 113 of the instrument panel 104 and the air volume distribution door 116.
It is distributed according to the opening degree. Then, a predetermined amount of conditioned air is blown toward the front seat 102 from the front seat outlet 111.
Further, a predetermined amount of conditioned air is simultaneously blown out from the rear seat outlet 112, but the air flow A (see FIG. 1) in this case depends on the shape of the duct and the arrangement of the outlets, as shown by the arrow in FIG. It flows straight from the center position in the left-right direction to the rear without hitting the front passenger F, and reaches the chest level by the rear passenger 103R. As a result, the conditioned air is evenly distributed to the rear seats 103, and airflow interference with the front seats 102 does not occur.

Next, the air conditioning control operation will be described with reference to the flow chart shown in FIG. First, after turning on the air conditioner switch, the amount of solar radiation S, the outside air temperature Ta, the front seat room temperature Tic
Various data such as h, rear seat room temperature Ticr, front seat room temperature Tsetf, and rear seat room temperature Tsetr are input (S40
1) Then, it is determined whether or not the vent mode is set (S40).
2). If it is determined that the vent mode is set, which of the front and rear seats has a larger difference between the detected room temperature and the set room temperature (Tic
It is determined whether r-Tsetr <Ticf-Tsetf) (S403).

When it is determined that the front seat 102 is larger, the detected room temperature Ticf and the set room temperature Tse of the front seat are determined.
The target outlet air temperature Tθf is calculated using tf, the amount of solar radiation S, and the outside air temperature Ta (S404). This ensures a sufficient cooling capacity. Next, the air mix door opening X is calculated based on the target blown air temperature Tθf (S40).
By 5), conditioned air corresponding to the above cooling capacity can be obtained. Further, fan voltages (air volumes) Vff and Vfr required respectively for the front seat 102 and the rear seat 103 are calculated by the difference between the detected room temperature and the set room temperature (S406), and the total voltage becomes the fan applied voltage VF. Then, the air volume distribution door opening R of the front and rear seats is calculated from the fan voltage ratio Vfr / Vff of the rear seat to the front seat (S407), and then the above step S
Return to 401.

Here, as shown in FIG. 3, the air flow distribution door 116 has a door opening R of 0% when the front seat outlet 111 is fully closed, and the rear seat outlet 112 is fully closed. The door opening R is set to 100%. Therefore, the map of the air flow distribution door opening R is set as a decreasing function with respect to the fan voltage ratio Vfr / Vff in the range of the door opening of 50% to 100%, and the fan voltage of the front seat 102, that is, the temperature. The larger the difference is, the larger the door opening R becomes, and the air volume distribution of the front seat 102 is increased.

Therefore, when there is a large difference between the detected room temperature of the front seat 102 and the set room temperature, a large amount of sufficiently cooled conditioned air is blown out from the front seat air outlet 111 and is preferentially air-conditioned. The temperature difference between the front seats 102 is efficiently reduced. Further, since the air is blown out from the rear seat outlet 112 with a distribution of less than half of the air volume, the rear seat 103 is maintained in a good air-conditioning state with a small temperature difference. In this way, the front and rear seats 102 and 103 are temperature-controlled without causing insufficient cooling capacity, and the temperature interference is reduced by the arrangement of the front and rear seat air outlets 111 and 112. Therefore, even if the front and rear seats are independent, the temperature is appropriately adjusted. To be done.

When it is determined in step S403 that the rear seat 103 is larger in the difference between the detected room temperature and the set room temperature, the target blown air temperature T is calculated using the rear seat signal.
θf is calculated (S408). Then, the air mix door opening X is calculated (S409) and the fan applied voltage VF is calculated.
Is calculated (S410), the air volume distribution door opening R of the front and rear seats is calculated from the fan voltage ratio Vff / Vfr of the front seat to the rear seat (S411), and the process returns to step S401.

In this case, the map of the air volume distribution door opening R shows that the fan voltage ratio Vf is in the range of 0% to 50% of the door opening R.
It is set as an increasing function with respect to f / Vfr, and the rear seat 103
Fan voltage, that is, the greater the temperature difference, the greater the door opening R
Becomes smaller and the air volume distribution in the rear seat 103 increases. Therefore, when the difference between the detected room temperature of the rear seat 103 and the set room temperature is large, a large amount of sufficiently cooled conditioned air is blown out from the rear seat outlet 112 to be preferentially air-conditioned, The temperature difference of 103 is likewise effectively reduced.

Further, in step S402,
When it is determined that the vent mode is not set, the front seat 102
Using the average signal value of the rear seat 103 and the target air temperature T
θf is calculated (S412), the air mix door opening X is calculated (S413), the fan applied voltage VF is calculated (S414), and the process returns to step S401. Therefore, in this case, the conditioned air having the average cooling capacity required for the entire passenger compartment is blown out from the other outlet.

(Second Embodiment) Next, a second embodiment relating to air conditioning control will be described. In this embodiment, the front / rear seat signal selection means 341 shown in FIG. 3 includes the outside air temperature sensor 120, the solar radiation sensor 121, and the front seat room temperature sensor 12.
2. The front and rear seats 10 are driven by input signals from the rear seat room temperature sensor 124, the front seat room temperature setting device 123, and the rear seat room temperature setting device 125.
The difference between the detected room temperature of 2,103 and the set room temperature is obtained. When the difference between the front and rear seats 102 and 103 is larger than the set value and both front and rear seats are excessive, the signal with the larger difference is selected, and either one or both of the steady signals is smaller than the set value. In some cases, the signal with the smaller difference is selected. Then, the target outlet air temperature calculation means 342
The target outlet air temperature is calculated using the signal of the difference between the detected room temperature selected by the front and rear seat signal selection means 341 and the set room temperature. Since the other parts are the same, description thereof will be omitted.

Next, the air conditioning control operation of the above embodiment will be described with reference to the flow chart shown in FIG. First, after turning on the air conditioner switch, the amount of solar radiation S, the outside temperature Ta, the front seat room temperature Ticf, the rear seat room temperature Ticr, the front seat room temperature Ts.
Various data such as etf and rear seat setting room temperature Tsetr are input (S501), and then it is determined whether or not the vent mode is set (S502). When it is determined that the vent mode is set, it is determined whether the difference between the room temperature Ticf of the front seat 102 and the set room temperature Tsetf is 3 degrees or more (3 ° C. <Ticf−Tsetf) (S503). If it is determined that the temperature is 3 degrees or more, it is determined that the front seat 102 is in an excessive state, and whether the difference between the room temperature Ticr of the rear seat 103 and the set room temperature Tsetr is 3 degrees or more (3 ° C < (Ticr-Tsetr) is determined (S504).

If it is determined that the temperature is 3 degrees or more, the rear seat 103 is also determined to be in an excessive state, and the magnitude relationship between the room temperature of the front and rear seats and the set room temperature is compared (Ticf-Tsetf <
(Ticr-Tsetr) / determination (S505). As a result, when it is determined that the rear seat 103 is larger, the rear seat signal is used to calculate the target blown air temperature Tθf (S506) as in the case shown in FIG. 4 and the air mix door opening X is set. The fan voltage VF is calculated (S507), the air volume distribution door opening R is calculated (S50).
9) Then, the process returns to step S501.

Further, in step S504, the difference between the room temperature Ticr of the rear seat 103 and the set room temperature Tsetr is three.
If it is determined that the rear seat 103 is stationary, it is determined that the rear seat 103 is stationary, and the rear seat signal is used to proceed to step S506 and subsequent steps. Therefore, when the front seats 102 are excessive and the rear seats 103 are stationary, the target blown-air temperature Tθf is calculated using a signal with a smaller temperature difference between the rear seats 103, so that the cooling capacity is the minimum required. The rear seat 103 is stationary
The comfortable state of is maintained with priority.

Further, in step S505,
When it is determined that the front seat 102 has a larger difference between the room temperature Ticf and the set room temperature Tsetf, the front seat signal is used, and FIG.
Similar to the case shown in (1), the target outlet air temperature Tθf is calculated (S510), and the air mix door opening X is calculated (S510).
511), the fan voltage VF is calculated (S512), the air volume distribution door opening R is calculated (S513), and the process returns to step S501.

In step S503, the difference between the room temperature Ticf of the front seat 102 and the set room temperature Tsetf is three.
When it is determined that the temperature is less than or equal to the degree, it is determined that the front seat 102 is stationary, and then the state of the rear seat 103 (3 ° C <Ticr-T
setr) is determined (S514). Here, back seat 10
When it is determined that the difference between the room temperature Ticr of 3 and the set room temperature Tsetr is 3 degrees or less, the rear seat 103 determines that it is excessive and uses the signal of the front seat. After that, the above step S51
Proceed to 0 or later. Therefore, in this case, the target blowout air temperature Tθf is calculated from the steady signal of the front seat 102, so that the similarly stable state of the comfortable front seat 102 is preferentially maintained.

Further, in step S514,
When it is determined that the difference between the room temperature Ticr of the rear seat 103 and the set room temperature Tsetr is 3 degrees or less, the front and rear seats 102, 1
03 is determined to be steady, and which of the differences between the front and rear seats 102 and 103 is smaller ((Ticf-Tsetf <Ticr
-Tsetr) is determined (S515). Here, when it is determined that the front seat 102 is small, it is determined that the front seat 102 is more steady, and the front seat signal is used to execute the above step S51.
Proceed to 0 or later. In step S515, the rear seat 1
If it is determined that 03 is smaller, the rear seat signal is used and the process proceeds to step S506 and subsequent steps. In this way, the steady side is prioritized.

If it is determined in step S502 that the vent mode is not set, the target blowout air temperature Tθf is calculated using the average value of the front and rear seat signals as in the case shown in FIG. 4 (S516). ), The air mix door opening X is calculated (S517), the fan voltage VF is calculated (S518), and the process returns to step S501.

[0032]

As described above, according to the present invention, in the air conditioning control of the vehicle air conditioner, the one having a larger difference between the room temperature of the front and rear seats and the set room temperature is selected, and the selected signal is used. The target outlet air temperature is calculated, and the air mix door opening, fan applied voltage, and air volume distribution door opening are calculated, so the front and rear seats are efficiently air-conditioned to the desired temperature without causing insufficient cooling capacity. can do. Also, temperature interference is reduced, and the temperature control performance independent of each other can be improved.

When selecting the signal for the front and rear seats, it is judged whether it is excessive or steady depending on the difference between the room temperature of the front and rear seats and the set room temperature, and when either of the front and rear seats is steady, the difference on the steady side is determined. Since the smaller one is selected, it is possible to prevent the feeling from deteriorating due to the low warm air on the near-steady side.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a vehicle air conditioner according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an arrangement state of front seat outlets and rear seat outlets of the instrument panel shown in FIG.

FIG. 3 is a block diagram showing a schematic configuration of an air conditioning control unit according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing an operation example of the air conditioning control unit shown in FIG.

5 is a flowchart showing an operation example of the air conditioning control unit shown in FIG. 3 according to a second embodiment.

FIG. 6 is a perspective view showing a configuration of a conventional instrument panel.

FIG. 7 is a cross-sectional view showing a schematic configuration of a vehicle air conditioner using the instrument panel shown in FIG.

[Explanation of symbols]

332 Blower Fan 341 Front / rear seat signal selection means 342 Target blown air temperature calculation means 343 Air mix door opening calculation means 344 Fan voltage calculation means 345 Air Volume Distribution Door Opening Calculating Means

Continuation of the front page (56) Reference JP-A-58-218420 (JP, A) JP-A-61-105204 (JP, A) JP-A-63-121519 (JP, A) JP-A-59-53224 (JP , A) Actual development Sho 62-127449 (JP, U) Actual development 2-63213 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60H 1/00 101

Claims (2)

(57) [Claims] 1. A control means for controlling the entire apparatus based on the thermal environment conditions of the front seats and the thermal environment of the rear seats, the control means before and after selecting one having a large difference between the room temperature of the front and rear seats and the set room temperature. A seat signal selecting means, a target outlet air temperature calculating means for calculating a target outlet air temperature using the signals selected by the front and rear seat signal selecting means, and a target outlet air temperature calculated by the target outlet air temperature calculating means. The air mix door opening is calculated based on the air mix door opening, and the air mix door opening calculating means that outputs a door opening signal to the air mix door, and the overall fan applied voltage is calculated by the difference between the detected room temperature of the front and rear seats and the set room temperature. Then, the fan voltage calculation means for controlling the motor voltage of the blower fan and the air volume distribution door openings of the front and rear seats are calculated from the fan voltage ratio of the front and rear seats calculated by the fan voltage calculation means. An air conditioner for a vehicle, comprising: an air volume distribution door opening calculation unit that calculates and outputs a door opening signal to the air volume distribution door. 2. The front / rear seat signal selecting means determines whether the front / rear seats are at an excessive or steady temperature based on the difference between the room temperature of the front / rear seats and the set room temperature. 2. The vehicle air conditioner according to claim 1, wherein: