JPH0525931Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a vehicle air conditioner.

[Conventional technology]

In conventional vehicle air conditioner control devices,
For example, various sensors are installed to control the temperature and volume of air blown out so that the average temperature inside the vehicle approaches the set temperature throughout the vehicle space. However, with this conventional device, if the occupants are only in the front seats, the air volume is too large and the fan operation noise is too loud. Also, when riding in the rear seats, there were complaints that the airflow was low and that it felt hot or cold, and the controls lacked precision. In particular, during heating, warm air was distributed from the front seat air conditioner to the rear seats using ducting, and the fan operating voltage was increased to ensure sufficient air volume for the rear seats. As a result, it has been pointed out that the operating noise is noisy.

[Problem that the invention attempts to solve]

As mentioned above, conventional vehicle air conditioners have a problem in that the temperature and air volume of the blown air differ between the front seats and the rear seats, making it impossible to perform detailed control to obtain comfortable air conditioning.

In order to solve the above-mentioned conventional problems, this invention is equipped with an air conditioner on the front seat side and the rear seat side respectively, and when the rear seat air conditioner switch (hereinafter referred to as the rear seat switch) is in operation, the rear seat air conditioner is In order to improve the air conditioning, the operating state of the front seat side air conditioner is changed to increase the air volume, and the control state is changed so that the air volume is reduced when the rear seat switch is stopped. At certain times, by turning on the rear seat switch, the rear seat air conditioning system is activated, and at the same time, the front seat air conditioning system is also activated to improve the air conditioning condition of the rear seats.Furthermore, when only the front seats are occupied, When the rear seat switch is turned off, the rear seat air conditioner turns off and at the same time, the front seat air conditioner reduces the air volume and controls the front seat air conditioning capacity to achieve a quiet operating condition that is appropriate for the front seat occupants. The purpose is to provide equipment.

[Means for solving problems]

A vehicle air conditioner according to the present invention is provided with air conditioners on the front seat side and on the rear seat side, and has a switch for starting and stopping the rear seat air conditioner in a control operation section of the air conditioner. The operating state of the front seat air conditioner is changed depending on whether the front seat air conditioner is activated or stopped. Therefore, in this invention, for example, a circuit that determines the operating state of the rear seat switch and a circuit that increases the air volume of the front seat air conditioner when the rear seat switch is ON, simultaneously lower the air outlet temperature when heating, and when cooling Increase the blowing temperature,
When the rear seat switch is OFF, the air volume of the front seat air conditioner is lowered, and at the same time, the air outlet temperature is increased during heating, and the air outlet temperature is lowered during cooling, and the air volume changes depending on whether the rear seat switch is turned ON or OFF. The system is equipped with a control circuit that determines the control amount of the air conditioner so that the air conditioning capacity is almost the same by changing the blowout temperature.

[Effect]

According to this invention, the rear seat switch can be operated while the rear seat passenger is seated.
When ON, the airflow to the rear seats increases, improving the feeling of the rear seats.When no one is seated in the rear seats, turning the rear seat switch OFF lowers the airflow, and changes the blowout temperature accordingly, making it quieter. This enables smooth driving and comfortable air conditioning.

〔Example〕

FIG. 1 is a system configuration diagram according to an embodiment of the present invention, showing the configurations of front seat side and rear seat side air conditioners. Fig. 2 is a block diagram for determining the dual (DUAL A/C) mode and its calculation in an embodiment of the present invention, and Fig. 3 shows the dual (operating status of both front and rear seat air conditioners) or single (front and rear air conditioners) mode. Fig. 4 shows a flowchart of the dual or single mode discrimination and control amount calculation circuit, and Fig. 5 shows an example of the rear seat switch. It is a diagram.

In Fig. 1, reference numeral 1 indicates the interior of the vehicle, which is the space to be air-conditioned. Configure the device.
6 is a fan controller that controls the operating voltage of the motor 2a of the blower 2; 7 is a damper controller that controls the opening of the air mix damper 5; It is constituted by a potentiometer 7b that detects.

The air conditioner on the rear seat side has 11 air purifiers and 1 blower.
2, an exhaust system 13, and a rear seat cooling system 14. Reference numeral 15 denotes a control device for the air conditioner system according to the present invention, which includes an operating section and a second control device shown in FIG.
It is composed of a control section including symbols 16, 17, and 18 in the figure. Further, 8 is an in-vehicle sensor that detects the temperature inside the car, and 9 is an outside air sensor that detects the outside temperature.

In FIG. 2, the operating state of the air conditioner is detected by a temperature setting device 20, an in-vehicle sensor 8, an outside air sensor 9, a rear seat A/C switch (plurality) 21, and a potentiometer 7b, and the detected value is detected by an A/D converter. converter 1
6 to the arithmetic circuit 17 to calculate the control amount, drive the air mix damper drive motor 7a via the motor driver 18, and at the same time control the operating voltage of the blower motor 2a of the front seat side air conditioner to the fan controller. Control via 6. It is assumed that other air controls and rear seat controls (not shown) are controlled by conventional control means. The arithmetic circuit 17 described above performs arithmetic processing according to the flowchart shown in FIG. At the same time as the start, various data are collected and data held (RAM store), and the air conditioning load Q is calculated as shown in the following equation, for example.

Q=(Tr-Ts)× _G1 +(Ta-Ts)× _G2 +SUN× _G3 +A+B Here, _G1 , _G2 , _G3 are control gains of each operator, A, B are control constants, SUN is the amount of solar radiation Next, the operation status of the rear seat A/C switch 21
The DUAL mode is determined, and if YES, the fan motor voltage and the air mix damper (A/M damper) opening degree are calculated and the control amount is output so that the dual state is achieved as shown in FIG. If NO, calculate the single state, output the control amount, and return to the sampling step to repeat this process. In Fig. 3, the air conditioning load between Q ₁ and Q ₂ shows the heating state when it is cold, and in this region, in the dual state, the fan voltage is increased and the air mix damper opening is cooled to increase the air volume (MC side). This control aims to bring the amount of heat to the same level as in the single state. In addition, the air conditioning load region Q ₂ to Q ₃ indicates the cooling range in summer, and in the dual mode, the fan voltage is increased to increase the air volume so that the cold air reaches the rear seat passengers sufficiently.

FIG. 5 shows the operation section of the control device 15, and 20 is a temperature setting device for setting the target temperature inside the vehicle, which is digitally displayed. Reference numeral 21 denotes a rear seat A/C switch, which is a switch for a rear seat blower, and when activated, controls the rear seat air outlet automatically. Also, as switches for the rear seats, there are provided an air conditioner switch, a blow direction selection switch, and an exhaust switch.

With the above configuration, it is determined whether or not the rear seat side air conditioner is operating, and the front seat side air conditioner determines the air flow rate (fan motor voltage) and the blowout temperature (air mix damper = A/
The M damper opening degree) is controlled to be in the control state shown in FIG. In other words, when operating only the front seats (SINGLEA/C), the fan motor voltage is lowered and the amount of air blown is lowered, resulting in quiet air conditioning operation. In the dual mode, the fan motor voltage is increased so that the air-conditioned air from the front seat side can be sufficiently distributed to the rear seats, resulting in a large amount of airflow and noisy noise for the front seat passengers. Particularly in heating areas where the outside air temperature is low, as shown in the system configuration shown in Figure 1, the rear seat air conditioner does not have a heating function, and the heating air from the front seat side air conditioner is distributed to the rear seats by ducting, so the fan motor is activated. The operating noise is loud and is noisy for front seat passengers. Therefore, when there are no occupants in the rear seats, by turning off the rear seat A/C switch, single A/C operation is performed mainly for the front seats, and quiet air conditioning can be obtained.

[Effect of idea]

According to the present invention, the following excellent effects can be achieved.

(1) In a vehicle air conditioner, which has air conditioners on the front seat side and rear seat side respectively, and has a switch for operating and stopping the rear seat air conditioner in the control operation section of the air conditioner, there is a switch for operating and stopping the rear seat switch. Accordingly, by controlling the operating state of the front seat side air conditioner, for example, so that the air volume increases when the rear seats are activated, and decreases when the rear seats are stopped, the temperature of the blowing air is also controlled.
If only the front seat is occupied, the air conditioning operation will be quiet, and if the passenger is seated in the rear seat, the air conditioning of the rear seats will be emphasized by increasing the air volume, allowing the air conditioning operation to be prioritized with a simple operation.

(2) Lately, even luxury cars with front and rear air conditioning systems are increasingly being used for personal purposes.
Opportunities for only people to ride are increasing. Naturally, there are many occasions when important passengers are seated in the back seat, and there is a growing need to be able to easily select the operating state of the air conditioner while in the vehicle. It is practical and effective because it can be realized through arithmetic processing without having to do so.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.
2 is a calculation block diagram, FIG. 3 is a control state diagram, FIG. 4 is a flowchart of the control amount calculation circuit, and FIG. 5 is a diagram showing an example of the rear seat switch. 3... Front seat cooling device, 14... Rear seat cooling device, 15... Control device, 21... Rear seat switch.

Claims (1)

[Scope of utility model registration request] In a vehicle air conditioner, which is equipped with an air conditioner on the front seat side and a rear seat side, and has a switch for operating and stopping the rear seat air conditioner in the control operation section of the air conditioner, when the switch is activated or stopped, , increases the fan rotation speed of the front seat air conditioner and simultaneously lowers the blowout temperature during heating, increases the blowout temperature during cooling, and simultaneously decreases the fan rotation speed of the front seat air conditioner when it is stopped; An air conditioner for a vehicle is characterized by being equipped with a control circuit that increases the air outlet temperature and lowers the air outlet temperature during cooling.