JPH0336407Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an air conditioner for an automobile that can independently air condition the front seats and the rear seats.

(Prior art) Recent automotive air conditioners include
As disclosed in Japanese Utility Model Publication No. 76412 and Japanese Utility Model Application Publication No. 58-85513, there is an air conditioner capable of independently air-conditioning the front and rear seats of a vehicle.

A common type of air conditioner is the
It is shown in the figure and is configured as follows.

As shown in the figure, the air circulation section of this automotive air conditioner is composed of an intake unit 1, a cooler unit 2, and a heater unit 3.

The intake unit 1 has an intake door 4 that switches the air taken into the vehicle interior between inside air and outside air.
and a fan 5 that takes in air from an air intake port selected by the intake door 4.

Cooler unit 2 has intake unit 1
An evaporator 6 is installed to cool the air taken in from the air.

In the heater unit 3, an air flow passage 8 for the front seat and an air flow passage 9 for the rear seat are formed by a partition wall 7, and the partition wall 7 is used to heat the air cooled by the cooler unit 2. The heater core 10 is
The airflow passage 8 for the front seat and the airflow passage 9 for the rear seat divide the area into two. Furthermore, a first mix door 11 is provided in front of the heater core 10 of the front seat air flow passage 8 to adjust the temperature of the air blown to the front seat side of the vehicle interior. A second mix door 12 is provided on the front surface of the vehicle 10 to adjust the temperature of the air blown into the rear seat side of the vehicle interior. The partition wall 7 located downstream of the heater core 10 guides the air that has passed through the rear seat air flow passage 9 to the front seat air flow passage 8 and adjusts the amount of air blown out to the rear seat. A separate door 13 is provided. The front seat airflow passage 8 also includes a differential door 14 that opens and closes a passage communicating with the differential air outlet, and a vent door 15 that opens and closes a passage that communicates with the vent air outlet.
and a foot door 16 that opens and closes a passage communicating with the foot outlet. Further, behind the separate door 13 of the rear seat air flow passage 9, there is a partition wall 1 that divides the rear seat air flow passage 9 into two.
7 is provided, and this partition wall 17 forms a rear seat foot passage 18 that guides air to the lower part of the rear seat and a rear seat vent passage 19 that guides air to the upper part of the rear seat. A rear mode door 20 is provided on the front surface of the partition wall 17 to adjust the amount of air flowing into the rear seat foot passage 18 and the rear seat vent passage 19.

These doors are connected to an intake door actuator 21, a first mix door actuator 22, a second mix door actuator 23, and a shift actuator 24, respectively. It is driven by a control device 27 that operates based on signals from various sensors 25 installed inside and outside the vehicle interior, and a control panel 26 installed inside the vehicle interior that sets the temperature, etc. inside the vehicle interior requested by the occupants. It is becoming more and more like this.

Next, a schematic configuration diagram of a part of the periphery of the control device 27 is shown in FIG.

As shown in the figure, the control device 27 includes a mode detection section 36 that outputs an opening/closing signal for each door to the shift actuator 24 based on an output signal from a control switch 28 provided on the control panel 26. Various sensors 25, such as an outside air sensor 30, an inside air sensor 31, an inlet sensor 32, and an intake air temperature sensor 33, which are installed inside and outside the vehicle interior, 1st P, B, and R 34 that detect the opening degree of the first mix door 11;
A second P that detects the opening degree of the second mix door 12;
B, R35 and P, T, C29 which are provided on the control panel 26 and set the required temperature in the vehicle interior.
First and second mix door opening calculation units 37 are provided which output opening/closing signals to the first mix door actuator 22 and the second mix door actuator 23 based on output signals such as the above.

The opening degree of the rear mode door 20 can be adjusted using a control lever or a control switch on a control panel provided in the rear seat.

(Problem to be Solved by the Invention) However, in such a conventional automobile air conditioner, since the distance from the second mix door 12 to the rear mode door 20 is long, the distance between the second mix door 12 and the rear mode door 20 is long. When the door 20 is in the bilevel mode, in which the door 20 is opened approximately at the center, warm air flows into the foot passage 18 for the rear seat, while cold air flows into the vent passage 19 for the rear seat. It becomes difficult to maintain ideal air conditioning conditions. In other words, the airflow of cold air and warm air created by the second mixing door 12 is mixed before reaching the rear mode door 20, and as a result, the airflow is mixed with the rear seat foot passage 18 selected by the rear mode door 20. A problem arises in that the temperatures of the air flowing into the rear seat vent passage 19 become approximately the same.

The air mixed in this way has a moderate temperature because it is a mixture of cold air and warm air with a temperature difference that makes it comfortable when blown out in bilevel mode. If you move the rear mode door 20 in this state and blow out this mixed air from the rear seat foot outlet, you will feel cold, but if you let it blow out from the rear seat vent outlet, you will feel hot. .

This problem will be explained based on FIG. In the figure, the vertical axis shows the air outlet temperature [° C.] of each air outlet, and the horizontal axis shows the front seat (first) mix door opening degree and the rear seat (second) mix door opening degree.
The curve indicates the air outlet temperature at each outlet of the vent and foot of the rear seat, the curve indicates the outlet temperature of air at each outlet of the vent mode and foot mode of the front seat, and further,
The curves indicate the air outlet temperature at each outlet of the foot and vent of the front seat in the bilevel mode of the front seat (first) mixer door 11.

As is clear from this figure, both the vent door 15 and the foot door 16 provided in the front seat air flow passage 8 are open, and the rear mode door provided in the rear seat air flow passage 9 is open. 20 is located approximately in the center, that is, in the bilevel mode, the temperature of the vent outlet of the front seat changes as shown in the curve according to the opening degree of the first mixer door 11. The temperature of the front seat foot outlet changes as shown in the curve depending on the opening degree of the first mixer door 11, while the temperature of the air at each of the rear seat vent and foot outlet is shown by the curve. Thus, despite the bilevel mode, the temperature difference between the air at each outlet cannot be obtained.

For this reason, the occupants in the rear seats were unable to enjoy the comfortable air-conditioned conditions described above.

This invention was created in view of these conventional problems, and when the front seats are in bi-level mode, the air conditioning status of the rear seats is changed so that the comfort of the rear seat passengers is not compromised. It is an object of the present invention to provide an air conditioner for an automobile.

(Means for Solving the Problems) The present invention to achieve the above object divides the airflow passage into two parts, which are equipped with a heater core that heats the introduced air, and introduces the air into the front seat of the vehicle. A second air flow passage is formed that guides air to the air flow passage and the rear seat of the vehicle, and the first air flow passage includes a vent door that opens and closes the passage that guides air to the center of the front seat, and the front seat. A foot door for opening and closing a passage for introducing air is provided at the bottom of the rear seat, and a third air passage is provided by dividing the second air passage into two to guide air to the lower part of the rear seat, and a foot door for opening and closing a passage for introducing air is provided at the upper part of the rear seat. a fourth air flow passage that guides the flow of air, and a second mix door that adjusts the amount of air passing through the heater core is provided between the air inlet of the second air flow passage and the heater core; An air conditioner for an automobile, comprising: an air flow passageway and an air inlet of the fourth airflow passageway provided with a rear mode door that adjusts the amount of air flowing into the third airflow passageway and the fourth airflow passageway. , a bilevel mode detection means for detecting that both the vent door and the foot door are opened; a rear mode door driving means for driving the rear mode door based on an output signal of the bilevel mode detection means; a second mixer door that calculates an opening correction amount for the second mix door when a signal is output from the bi-level mode detection means;
mix door opening correction amount calculation means; second mix door opening calculation means for calculating the opening of the second mix door based on the output signal of the second mix door opening correction amount calculation means; and second mix door opening calculation means. and a second mix door driving means for driving the second mix door using an output signal from the mixer.

(Function) With this configuration, when the bilevel mode is selected, temperature-controlled air is automatically blown out from the foot outlet of the rear seat, and the temperature-controlled air is automatically blown out from the foot outlet of the rear seat. In this case, warm air with a temperature similar to that blown out from the foot outlet of the front seat is blown out.

As a result, warm air is blown out under the feet of the rear seat occupant, improving the comfort of the rear seat occupant.

(Example) Below, an example of the present invention will be described in detail based on the drawings.

FIG. 2 is a schematic diagram of a part of the periphery of the control device 27 according to the present invention, and is configured as described below.

In the control device 27, a control panel 26 is provided.
A mode detection unit 36 outputs an opening/closing signal for each door to the shift actuator 24 based on an output signal from a control switch 28 provided in Various sensors 25 such as the sensor 32 and the intake air temperature sensor 33, the first P, B, R 34 that detects the opening of the first mix door 11, the second P, B, R 35 that detects the opening of the second mix door 12, and the control panel 26. The first mix door actuator 22 and the second mix door actuator 23 output opening/closing signals based on the output signals of P, T, C29, etc., which set the required temperature inside the vehicle. 1. Second mix door opening calculation unit 3
7 is provided. Then, the mode detection section 3
6 and the first and second mix door opening calculation sections 37 are connected to each other.

Then, the control device 27 configured as above
The program operates as follows based on the program flowchart shown in FIG.

STEP 1 Based on the signal from the mode detection section 36 that detects the mode of the control switch 28 or the first and second mix door opening calculation sections 37, the mode detection section 36 detects the vent door 15 and the foot door 16.
It is determined whether the is in bilevel mode. If it is bi-level mode, proceed to STEP 2,
If it is not bi-level mode, proceed to STEP 6.

STEP 2 When it is determined in STEP 1 that the mode is the bi-level mode, the first and second mix door opening calculation sections 37 calculate the opening correction amount of the second mix door 12. This opening correction amount is the required movement amount of the second mix door 12 so that air having a temperature approximately equal to the temperature of the air blown out from the foot outlet in the front seat is blown out from the foot outlet in the rear seat. . Specifically, how much the second mix door 12 should be moved in the direction B in FIG. 4 is calculated.

STEP 3 Based on the opening correction amount calculated in STEP 2,
The first and second mix door opening calculation units 37 calculate
The opening degree of the second mix door 12 is calculated.

STEP 4 Based on the opening degree of the second mix door 12 calculated in STEP 3, the second mix door actuator 2 is
3, a signal is output to set the second mix door 12 to the calculated opening degree.

STEP 5 The shift actuator 24 receives the signal from the mode detection section 36, moves the rear mode door 20, and closes the rear seat vent passage 19.

As described above, when the front seat side is in the bi-level mode, by controlling the second mixer door 12 and the rear mode door 20 as described above, the system is controlled as shown by the curve V shown in FIG. The temperature of the air flowing into the rear seat foot passage 18 can be made approximately equal to the temperature of the air flowing into the front seat foot outlet.

Note that the embodiments described above are only for the case of a fully automatic air conditioner in which each door is automatically controlled by a detection signal from a sensor, etc., but the present invention is not limited to this. Of course, the present invention can be applied to any type of air conditioner as long as each door is driven by an actuator.

(Effect of the invention) As is clear from the above explanation, according to the invention, when the front seat is set to the bi-level mode, air is blown from the front seat foot air outlet and the rear seat foot air outlet. By making the air temperature almost the same and automatically blowing out the air from the foot vents in the rear seats, this has the excellent effect of improving the comfort of the rear seats when in bi-level mode. play.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a door control device according to the present invention, FIG. 2 is a schematic configuration diagram of a door control device according to the present invention, and FIG. 3 is a program for a door control device according to the present invention. FIG. 4 is a schematic diagram of a typical front and rear air conditioning system for automobiles, FIG. 5 is a schematic diagram of a conventional door control device, and FIG. 6 is a diagram of a door according to the present invention. FIG. 2 is a diagram for explaining the operation of the control device of FIG. 7, 17... Partition wall, 8... Front seat air flow passage, 9... Rear seat air flow passage, 10... Heater core, 11... First mix door, 12... Second mix door, 15... Vent door, 16...Foot door, 18...Foot passage for rear seats, 19...Vent passage for front seats, 20...Rear mode door.

Claims (1)

[Claims for Utility Model Registration] An air flow passage equipped with a heater core 10 that heats the introduced air is divided into two parts, and a first air flow passage 8 leads air to the front seats of the vehicle, and a first air flow passage 8 leads air to the rear seats of the vehicle. A second air flow passage 9 is formed, and the first air flow passage 8 includes a vent door 15 that opens and closes a passage that guides air to the center of the front seat, and a vent door 15 that opens and closes a passage that guides air to the lower part of the front seat. A foot door 16 that opens and closes is provided, a third air flow passage 18 that divides the second air flow passage 9 into two to guide air to the lower part of the rear seat, and a fourth air flow passage 18 that guides air to the upper part of the rear seat. Distribution path 1
A second mix door 12 is provided between the air inlet of the second air flow path 9 and the heater core 10 to adjust the amount of air passing through the heater core 10. Road 1
8 and the air inlet of the fourth air flow passage 19,
In the automobile air conditioner provided with a rear mode door 20 that adjusts the amount of air flowing into the third air flow passage 18 and the fourth air flow passage 19, the vent door 15 and the foot door 16 are both open. bi-level mode detecting means 40 for detecting that the bi-level mode detecting means 40 is turned on; rear mode door driving means 50 for driving the rear mode door 20 by the output signal of the bi-level mode detecting means 40; and from the bi-level mode detecting means 40. a second mix door opening correction amount calculation means 60 that calculates the opening correction amount of the second mix door 12 when a signal is output; and a second mix door opening correction amount calculation means 60.
a second mix door opening calculation means 70 for calculating the opening of the second mix door 12 based on the output signal of the second mix door 12;
and a second mix door driving means 23 for driving the second mix door 12 based on the output signal of the second mix door opening calculating means 70.