JPH0629054Y2 - Air conditioning controller for automobile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an air conditioning controller for a vehicle, which is provided with a humidifier and controls the humidity of the air in the vehicle interior.

(Prior Art) In a conventional vehicle air conditioning control device equipped with a humidifier, when humidifying the interior of the vehicle, a humidifier is manually operated in response to a passenger's request for humidification. Many. According to such an operation method, there is an advantage that the vehicle interior can be constantly maintained at a desired humidity even when the air inside the vehicle interior is low outside air.

(Problems to be solved by the invention) However, when the outside air is low, if the air introduced into the air conditioning duct is switched to the passenger compartment air (inside air) by the inside / outside air switching device, the window glass of the vehicle tends to be fogged. It has been confirmed that if the humidifier is operated in the state where the inside air is introduced, the window glass is more likely to be fogged, which may lead to a dangerous state in operation.

In view of this, it is an object of the present invention to provide an air conditioning control device for an automobile, which prioritizes comfortable humidity control and prevents the window glass from becoming cloudy so as to ensure a safe driving state.

(Means for Solving the Problems) The gist of the present invention is, as shown in FIG. 1, an outside air temperature detector 19 for detecting an outside air temperature,
A humidifier 23 for humidifying the vehicle interior air; an inside / outside air switching device 2 for selectively introducing inside air or outside air into the air conditioning duct;
Humidifier operation command means 100 for manually instructing the operation of the humidifier 23, and inside / outside air switching command means 200 for instructing the inside / outside air switching device 2 to switch between the air to be introduced into the air conditioning duct and the inside / outside air. And a determination means 300 for determining whether or not the outside air temperature is below a predetermined temperature, and the inside / outside air switching command means 200 when the outside air temperature is determined to be below a predetermined temperature by the determination means 300.
When the inside air introduction is instructed by the internal humidifier 23, if the humidifier 23 is in operation, the humidifier 23 is stopped and the inside / outside air switching device 2 is set to the inside air introduction. The humidifier operation command means 1 is set to be introduced.
Control means 400 for operating the humidifier 23 after setting the inside / outside air switching device 2 to the outside air introduction when the operation of the humidifier 23 is instructed by 00.

(Operation) Therefore, when the outside air temperature is low, both the introduction of the inside air and the operation of the humidifier are selectively performed without performing the introduction of the inside air at the same time. There is no danger of becoming a cloudy state rapidly, and therefore the above problems can be achieved.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, the automobile air conditioner is provided with an inside / outside air switching device 2 on the most upstream side of the air conditioning duct 1, and this inside / outside air switching device 2 is divided into an inside air inlet 3 and an outside air inlet 4 inside and outside. The air switching door 5 is arranged, and the inside / outside air switching door 5
By operating the actuator 6 with the air conditioning duct 1
The inhalation mode can be changed by selecting the air to be introduced into the inside air and the outside air.

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

The evaporator 8 is pipe-connected to a compressor or the like (not shown) to form a cooling cycle, and the heater core 9 circulates engine cooling water to heat air. An air mix door 10 is provided in front of the heater core 9, and the air passing through the heater core 9 and the air bypassing the heater core 9 are adjusted by adjusting the opening of the air mix door 10 with an actuator 11. Is varied so that the temperature of the exhaled air is controlled.

Further, 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 mode doors 16a and 16b are provided at the divided portions. Mode door 16a, 1
By operating 6b with the actuator 17, a desired blowout mode can be obtained.

Reference numeral 18 is a vehicle interior temperature detector that detects the temperature of the air in the vehicle interior, and 19 is an outside air temperature detector that detects the outside air temperature. These output signals are multiplexers (MPs) that perform signal selection.
It is input to the A / C converter 21 via the X) 20, converted into a digital signal here, and input to the microcomputer 22. The microcomputer 22 is also supplied with output signals from a humidifier switch 24 for manually controlling the operation and stop of the humidifier 23 for humidifying the vehicle interior air and an operation panel 25.

The operation panel 25 is an A for automatically controlling the air conditioning equipment.
UTO switch 26, OF for stopping the operation of air conditioning equipment
F switch 27, DEF switch 28 for setting the blowout mode to the defrost mode, and intake mode for introducing the inside air (REC)
And outside air introduction switches (FRESH), inside and outside air changeover switches 29, 30, temperature setter 3 for setting the set temperature in the passenger compartment
1. A blower capacity setter 32 for setting a blower capacity and a blowout mode setter 33 for setting a blowout mode other than the defrost mode are provided, and the set vehicle interior temperature, blown capacity,
The blowing mode is displayed on the display unit 35 controlled by the microcomputer 22 via the display circuit 34.

The microcomputer 22 is a well-known one having a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an input / output port (I / O), etc., which are not shown, and the various inputs described above. Based on the signal, the actuators 6, 11, 17 and the blower 7
To the motor and the humidifier 23 of FIG.
A control signal is output via 6e, and each door 5, 10, 16
The drive control of a and 16b, the rotation control of the blower 7, and the ON / OFF control of the humidifier 23 are also performed.

FIG. 3 is a flowchart showing an example of a control routine of the inside / outside air switching device 2 and the humidifier 23 in the control by the microcomputer 22 described above. This control routine is for preventing fogging of the window glass 37 of the automobile, and the microcomputer 22 starts executing the program of this routine from step 50, and in step 52, the outside air temperature T _A is a predetermined low temperature. It is determined whether or not α or less. In this step 52, T _A is α
If it is determined that the value is larger than the above value (NO), there is almost no fear that the window glass 37 will be fogged, so control of the inside / outside air switching device 2 and the humidifier 23 by this routine is not necessary, and the air conditioning is performed via step 54. The process shifts to another control routine for controlling. On the other hand, when it is determined that T _A ≦ α (YES), the process proceeds to step 56, and it is determined whether the humidifier switch 24 is pressed. When it is determined in step 56 that the humidifier switch 24 is not pressed (NO), the process proceeds to step 58, and the switch 29 for commanding the inside air introduction (REC) of the inside / outside air changeover switches 29, 30 is selected. If it is determined in step 58 that the REC switch 29 is not pressed (NO), the process proceeds to step 60, and the switch 30 for instructing the outside air introduction (FRESH) is pressed. It is determined whether the FRESH switch 30
If it is determined that the button has not been pressed (NO), the routine proceeds to another routine via step 54.

If the humidifier switch 24 is pressed, step 56
To step 62, and in step 62, it is determined whether or not the suction mode flag F1 is "1". Here, F1 is “0” in the initial stage, and F1 =
When it is "0", it means that the inhalation mode is FRESH.
When 1 = “1”, it indicates that it is REC.
If F1 = "1" in this step 62, the flow advances to step 64 to switch the suction mode from REC to FRESH, the flag F1 is reset to "0" in step 66, the flow advances to step 68, and F1 ≠ " If it is "0", steps 64 and 66 are bypassed and the process proceeds to step 68.
In step 68, it is determined whether the humidifier flag F2 is "1". Here, F2 is “0” in the initial stage, and when F2 = “0”, the humidifier 23 is stopped (OFF), and when F2 = “1”, it is activated (ON). Are shown respectively. This step 6
In F8, if F2 = "1" is not satisfied, the humidifier 23 is not in operation yet.
Is activated, and the flag F2 is set to "1" in step 72.
Is set and the process proceeds to step 54, and if F2 = “1”, the humidifier 23 is already in operation, so step 7
Bypass 0, 72 and proceed to step 54.

On the other hand, when the REC switch 29 is pressed, the process proceeds from step 58 to step 74, and this step 74
At, it is determined whether the humidifier flag F2 is "1". If F2 = “1”, that is, if the humidifier 23 is operating, the process proceeds to step 76 to stop the humidifier 23, the flag F2 is reset to “0” in step 78, and then the process proceeds to step 80 where F2 ≠ “ 1 ", that is, the humidifier 23
If is stopped, the process proceeds directly to step 80. Then, in step 80, it is determined whether or not F1 = "1". If the inhalation mode is FRESH (F1 ≠ "1"), the process proceeds to step 82 to switch to REC, and then step 8
In step 4, the flag F1 is set to "1" and the process proceeds to step 54. If the suction mode is already REC (F1 = "1"),
As it is, the process proceeds to another control routine through step 54.

When the FRESH switch 30 is pressed, the process proceeds from step 60 to step 86, and this step 86
At, it is determined whether or not F1 = "1". If the inhalation mode is already set to FRESH, it is not necessary to switch the inhalation mode, so the process proceeds directly to step 54. When the inhalation mode is set to REC, the process proceeds to step 88 to switch to FRESH, and then the step. 54
To another control routine.

Therefore, by such a control routine, when the outside mode is low, when the humidifier switch 24 is turned on and an operation command for the humidifier 23 is issued in a state where the intake mode is set to REC, the intake mode is switched to FRESH. After the humidifier 23 is activated, the humidifier 23 is activated, and when the humidifier 23 is activated, the suction mode is changed from FRESH to R.
When the REC switch 29 is pressed to switch to EC, the humidifier 23 is stopped and the suction mode is switched to REC, so that the inside air introduction and the operation of the humidifier are not performed at the same time. The environment in which the glass tends to become cloudy is eliminated as much as possible.

(Effects of the Invention) As described above, according to the present invention, since the inside air introduction and the operation of the humidifier are not performed at the same time at low outside air, comfortable temperature control is not always performed. It is possible to prevent the window glass from becoming cloudy and to secure a safe driving state prior to comfortable temperature control.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the present invention, FIG. 2 is a configuration diagram showing an embodiment of an automobile air conditioning control device according to the present invention, and FIG. 3 is a diagram showing an inside / outside air switching device of a microcomputer and a humidifier in the same as above. It is a flow chart which shows an example of control operation. 2 ... Inside / outside air switching device, 19 ... Outside air temperature detector, 23 ...
... Humidifier, 100 ... Humidifier operation command means, 200 ...
Inside / outside air switching command means, 300 ... Judgment means, 400 ...
Control means.

Claims (1)

[Scope of utility model registration request] 1. An outside air temperature detector for detecting an outside air temperature, a humidifier for humidifying air inside a vehicle, an inside / outside air switching device for selectively introducing inside air or outside air into an air conditioning duct, and operation of the humidifier. Humidifier operation command means for manually commanding, the inside / outside air switching command means for switching the air to be introduced into the air conditioning duct between the inside air and the outside air by the inside / outside air switching device, and the outside air temperature below a predetermined temperature. When the inside air / outside air switching command means issues a command to introduce the inside air when the outside air temperature is lower than or equal to a predetermined temperature by the determination means for determining whether If the humidifier is in operation, the humidifier is stopped and the inside / outside air switching device is set to the inside air introduction, the inside / outside air switching device is already set to the inside air introduction, and the humidification is performed by the humidifier operation command means. Operation of the vessel Decree been automotive air conditioning control apparatus characterized by comprising a control means for actuating the humidifier on set to the outside air introducing said ambient air switching device when.