JP2525696B2 - Ventilation control device for automobile 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 an air conditioning control system for an automobile, and more particularly to a system capable of specifying a ventilation state in a vehicle compartment by manual operation by an occupant.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Publication No. 62-28014, an air conditioner for an automobile has a means for performing manual control of an intake mode and an outlet mode, a blowing capacity, and a cooling cycle. It is publicly known that a stop mode is designated to stop the control of air blowing and the control of a cooling cycle.

[0003]

By the way, when it is not necessary to operate the cooling cycle when the outside temperature is low but the thermal sensation due to solar radiation is strong, or when the outside temperature is in the middle, the cooling cycle is required. Is stopped and the outside air is taken in to enhance the ventilation effect in the passenger compartment.

However, in the above-mentioned prior art, in order to form such an environment, the once stop mode is instructed to turn off the cooling cycle and the blower, and then the blower capacity is manually reset to obtain a cool feeling. There was an annoyance to do.

Further, in the recent air conditioners, even when the cooling cycle and the blower are stopped by the stop command, the outside air introduced by the ram pressure is appropriately temperature-controlled and supplied into the vehicle interior. That is, in such an air conditioner, since the air mix door that adjusts the ventilation amount of the heater core is automatically controlled regardless of the stop command, a high temperature air may blow out in spite of obtaining the cool air. . In order to prevent this, another operation such as lowering the set temperature in the vehicle compartment is required.

Further, in an air-conditioning control device capable of selecting economic control of a cooling cycle, it is possible to specify economic control instead of normal cooling control while taking in outside air, but for automatic control of the air mix door. There is no guarantee that a cool sensation will be obtained, and the blowout mode may be set to a mode other than VENT mode due to the heat load in the passenger compartment. It was not possible to supply it to the occupants from the VENT air outlet in a form that gives a dignified feeling.

Therefore, an object of the present invention is to solve the above-mentioned drawbacks and to provide a ventilation adjusting device for an air conditioner for an automobile, which can perform ventilation control to give a passenger a dignified feeling with one operation.

[0008]

SUMMARY OF THE INVENTION However, the gist of the present invention is to provide an air intake mode, an air outlet mode, a mode relating to the operation and stop of a cooling cycle, a blower control state, and an opening degree of an air mix door. In an automobile air conditioner for manually or automatically controlling the air conditioner, a selection switch for selecting a ventilation control mode, a determination means for determining whether or not the selection switch is turned on, and a determination switch for determining whether or not the selection switch is turned on In this case, the suction mode is set to the outside air introduction mode, the blowout mode is set to the vent mode, the cooling cycle is set to the stop mode, the blower is set to the driving state, and the air mixing door is set to the minimum ventilation amount of the heater core. It is provided with a control means for setting each opening degree.

[0009]

Therefore, when the selection switch is turned on, the determination means determines that the selection switch has been turned on, and the control means stops the cooling cycle but does not stop the blower, so that the outside air is forcibly sucked. Is sent to the downstream side by pressure, and is blown to the passenger from the vent outlet without being heated. Therefore, the cool air can be sufficiently supplied to the occupant, and the above problem can be achieved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, an air conditioner for a vehicle is provided with an intake device 2 on the most upstream side of an air conditioning duct 1. The intake device 2 has an intake door 5 at a portion where an inside air inlet 3 and an outside air inlet 4 are separated. Is arranged, and the position of the intake door 5 is operated by the actuator 6 to select the air to be introduced into the air conditioning duct 1 between the inside air and the outside air, and the suction mode is set to the inside air circulation mode (REC) and the outside air introduction mode (FRESH). ) Can be switched to.

The blower 7 sucks air into the air-conditioning duct 1 and blows it to the downstream side, and an evaporator 8 and a heater core 9 are provided behind the blower 7.

The evaporator 8 is connected to a compressor 34, a condenser (not shown), a liquid tank, and an expansion valve to form a cooling cycle 36, and the compressor 34 is connected to an engine of an automobile through an electromagnetic clutch 35. By turning on and off the electromagnetic clutch 35, on / off control is performed.

The heater core 9 uses the engine cooling water as a heat source and heats the air passing through it.

An air mix door 10 is provided in front of the heater core 9. By adjusting the opening of the air mix door 10 with an actuator 11, the air passing through the heater core 9 and the heater core 9 are bypassed. The ratio with the air is adjusted so that the temperature of the blown air is controlled.

However, if the air mix door 10 is at the position I in the figure for maximizing the ventilation volume of the heater core 9,
It is in a fully hot state where maximum heating can be performed, and the ventilation volume of the heater core 9 is minimized (zero in this practical example) II in the figure
If it is in the position, it is in the state of minimum cooling and full cooling.

The downstream side of the air conditioning duct 1 is divided into a defrost outlet 12, a vent outlet 13, and a heat outlet 14 and opens into a vehicle compartment 15, and the mode doors 16a, 16b, 16c are provided at the divided portions. Is provided, and the mode doors 16a, 16b, 16c are connected to the actuator 17
The blowing mode can be switched by operating with.

Then, the actuators 16a, 16
The motors of b and 16c and the blower 7 are controlled based on output signals from drive circuits (not shown), and these drive circuits are connected to a microcomputer (not shown). The drive circuit and the microcomputer constitute a control unit 18 together with an A / D converter and a multiplexer (not shown).

The control unit 18 is connected with a vehicle interior temperature sensor 20 for detecting the temperature inside the vehicle compartment, an outside air temperature sensor 21 for detecting the outside air temperature, and a solar radiation sensor 22 for detecting the amount of solar radiation, and output signals of these sensors. Is selected by the multiplexer and input to the A / D converter,
After being converted into a digital signal by the A / D converter, it is input to the microcomputer.

A signal from the operation panel 23 is input to the control unit 18. This operation panel 23 is a temperature setter 24 for setting a target temperature in the vehicle compartment.
And various selection switches, more specifically, an OFF switch 25 for setting each air conditioner such as a blower to a stop mode, an AUTO for setting each air conditioner to an automatic control mode
The switch 26, the ECON switch 27 for economically controlling the cooling cycle, the DEF switch 28 for setting the blowout mode to the defrost mode, and the FR for selecting a mode in which the outside air is directly supplied to the occupant in order to adjust the passenger's warm feeling.
E AIR FLOW switch 29, the intake mode is the internal air circulation mode (REC) and the external air introduction mode (FRESH)
REC switch 30 for switching to, and fan switch 31 for switching the rotation speed of blower 7 to low speed, medium speed, and high speed,
32 and 33 are provided.

LEDs are incorporated in these various selection switches except for the OFF switch 25, and the LED of the selected switch is turned on when the switch is turned on.

Then, the control unit 18 controls the actuators 6, 1 based on various input signals from the sensors 20, 21, 22 and the operation panel 23.
1, 17 and the electromagnetic clutch 35, and the control signal is output to the motor of the blower 7, and the doors 5, 10, 16a, 16b,
The drive control of 16c, the ON / OFF control of the compressor 34, and the rotation control of the blower 7 are performed.

FIG. 2 is a flow chart showing an example of control operation based on manual operation, out of the control by the microcomputer of the control unit 18 described above. In step 50, the microcomputer causes the sensors 20, 21, 22 and Operation panel 23
Then, in step 52, it is determined whether or not the FRE AIR FLOW switch 29 is turned on.

If it is determined that the switch 29 is turned on, the process proceeds to step 54 and the blower (FA
N) the rotation speed is set to, for example, a medium speed, the air mix door 10 is fixed at the full cool position, the suction mode (INTAKE) is set to FRESH, and the blowout mode is set to the VENT mode in which only the vent outlet 13 is opened. The electromagnetic clutch 35 is turned off to stop the operation of the cooling cycle. When the switch 29 is turned on, the LED on the switch is turned on and the set temperature display is turned off.

However, if the FRE AIR FLOW switch 29 is pressed only once, the outside air is introduced from the outside air introduction port 4 by the rotation of the blower 7, and this outside air does not pass through the evaporator 8 and is heated by the heater core 9. Since the air is blown out from the vent outlet 13 toward the occupant, the occupant can feel a dignity due to the outside air. In addition to this, the set temperature display on the operation panel 23 disappears, and the
Since the LED of the IR FLOW switch 29 lights up,
It can be easily recognized that the current operation mode is manual and not the normal stop mode (mode in which the OFF switch 25 is pressed).

After step 54, in step 56, it is determined whether or not any of the blower switches 31, 32, 33 is turned on (ON). If it is determined that it is turned on, in step 58, Step 5
Regardless of the rotation setting of the blower by 4, the blower 7 is manually driven with the rotation ability corresponding to the selected switch.

When it is determined that the blower switches 31 to 33 are not turned on, step 58 is skipped and the process proceeds to step 60, where it is determined whether or not the REC switch 30 is turned on. Then, in this step 60, if it is determined that the REC switch is turned on, the process proceeds to step 62, and the suction mode is set to the internal air circulation mode (REC), and otherwise, it is set in the previous step 54. Outside air introduction mode (FRESH)
Step 62 is skipped to maintain

On the other hand, in step 52, F
When it is determined that the RE AIR FLOW switch 29 is not turned on, it is determined whether or not another selection switch is selected according to the behavior of the occupant, and when it is selected, the corresponding manual control is performed. (Step 64). The description of the specific processing is omitted.

Note that in this practical example, step 54
Although the rotation speed of the blower 7 in the above is fixed at the medium speed, the present invention is not limited to this, and it may be replaced by the conventional automatic control. That is, the vehicle interior temperature sensor 20,
The heat load state of the vehicle compartment is known based on the signals from the outside air temperature sensor 21 and the solar radiation sensor 22, and the rotation speed of the blower 7 is determined so that a predetermined characteristic pattern can be obtained based on the signals related thereto. To do.

[0030]

As described above, according to the present invention,
The outside air introduction mode, vent mode, cooling cycle stop mode, blower drive state, and intake air heating minimum state can be achieved with a single operation of the selection switch, so complicated manual operation is required to obtain a cool feeling. There is nothing to do.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a ventilation adjusting device for an automobile air conditioner according to the present invention.

FIG. 2 is a flowchart showing a control operation example of the control unit of the above.

[Explanation of symbols] 5 intake door 7 blower 10 air mix door 16a, 16b, 16c mode door 29 FRE AIR FLOW switch 36 cooling cycle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hidehisa Tsukada 1-7-2 Nishishinjuku, Shinjuku-ku, Tokyo Within Fuji Heavy Industries Ltd. (72) Shizuo Ishikawa 1-7-2 Nishishinjuku, Shinjuku-ku, Tokyo Issue Fuji Heavy Industries Ltd. (72) Inventor Kimihiko Sato 1-7-2 Nishishinjuku, Shinjuku-ku, Tokyo Within Fuji Heavy Industries Ltd. (72) Inventor Akio Kakinuma 1-2-7 Nishishinjuku, Shinjuku-ku, Tokyo No. Fuji Heavy Industries Ltd. (56) Reference JP-A-57-11107 (JP, A)

Claims (1)

(57) [Claims] 1. A vehicle air conditioner for manually or automatically controlling an air intake mode, a blow mode, a mode relating to operation and stop of a cooling cycle, a blower control state, and an air mix door opening. A selection switch for selecting the adjustment mode, a determination unit for determining whether or not the selection switch is turned on, and when the determination unit determines that the selection switch is turned on, the suction mode is set to the outside air introduction mode and the blowout mode is set. Mode to vent mode,
An air conditioner for a vehicle, comprising: a control unit that sets the cooling cycle to a stop mode, sets the blower to a driving state, and sets the air mix door to an opening degree that minimizes a ventilation amount of a heater core. Ventilation regulator.