JPS5851611Y2 - Automotive air conditioning distribution control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioning distribution control device suitable for automobiles, and more particularly to a control device including a compensation function for solar radiation imbalance.

Conventionally, as this type of air conditioning control device, proposals have been made to change the amount of air blown on the left and right sides depending on the amount of solar radiation on the left and right sides in the interior of an automobile.

Furthermore, Japanese Utility Model Publication No. 52-19300 proposes that the air conditioning distribution can be adjusted by operating a manual setting device, taking into account the passenger's wishes.

By the way, when a photoresistance element is used to detect solar radiation, its advantage of fast response to solar radiation becomes sensitive to subtle noise light, causing undesirable fluctuations in the air conditioning distribution. There is a problem that arises.

Therefore, an object of the present invention is to provide an air conditioning distribution control device that can adjust the air conditioning distribution according to the solar radiation distribution and the operation of the manual setting device without undesirably changing the air conditioning distribution due to such noise light. do.

For this reason, the present invention consists of a plurality of photosensitive resistance elements that detect the solar radiation distribution to each part of the vehicle interior, and a variable resistor that sets the air conditioning distribution of each part of the vehicle interior. A signal generation circuit that generates a composite voltage is provided, and a window comparator is provided that generates a reversible output signal by comparing the composite voltage from this signal generation circuit with two reference voltages that set a dead zone. The present invention is characterized in that the air conditioning distribution within the vehicle interior is changed by an actuator that responds to the output signal from the window comparator.

Therefore, according to the present invention, due to the dead zone set by the reference voltage of the window comparator, fluctuations in noise light within the range of the dead zone can be ignored, thereby preventing the actuator from operating unnecessarily. This has the advantage of not causing any discomfort to the occupants.

The present invention will be described above with reference to embodiments shown in the accompanying drawings.

In FIG. 1 showing the overall arrangement, numeral 1 denotes a known air conditioning unit, which is disposed at the front of the vehicle compartment.

2 is a duct for discharging air whose temperature has been adjusted by the air conditioning unit into the passenger compartment, and the tip of this duct 2 has air outlets 3 and 4 that are divided into the right side (usually towards the driver's seat) and the left side of the single room. It has become.

5 is a damper disposed inside the duct 2, the opening degree of which is changed by an electro-mechanical conversion type actuator 6,
It is also designed to adjust the proportion of air blown out.

Reference numerals 7 and 8 denote photoresistance elements (hereinafter simply referred to as optical sensors), which are known devices such as cadmium sulfide cells.

The optical sensors 7.8 are attached near the right pillar and the left pillar on the upper surface of the instrument panel (not shown), and are arranged to receive sunlight through the windshield.

9 is a variable resistor, and the resistance value is adjusted by an adjustment lever 9a provided at a position on the instrument panel that can be operated by the driver.
It is configured to reduce lJ cut.

10 is a control circuit including an amplifier, a sensor 7.8 and a variable resistor 9 are connected to the input side, and an actuator 6 is connected to the output side.

In FIG. 2 showing the electrical control system, optical sensors 7.8 are connected in series, and their connection point is connected to a sliding terminal of a variable resistor 9, and the resistance ratio of the optical sensor 7.8 is connected to this connection point. A signal voltage determined by the dividing ratio of the variable resistor is generated, and the signal line 11
A known window comparator 1 forming an amplifier via a
It is wired to input to 1.

The window comparator 11 has two reference signal voltages determined by the voltage division ratio of the resistor 12, 13 and the potentiometer 14 inputted through the lines 1, lb and llc.
When the signal voltage 11a is higher than the reference signal voltage 11b, an Ill level signal is generated on the output line 11d, and when the signal voltage 11a is lower than the reference signal voltage 11c, "1" is generated on the output line 11e.
Generates a level signal.

First, a dead zone is set by two reference voltages appearing on lines 11b and Ilc, and as the signal voltage 11a exhibits a variation within this dead zone, the output signals 11d and 11e produce a "1". No level signal is generated.

The actuator 6A has two solenoid valves and a diaphragm actuator that are turned on and off depending on the signals on lines 11d and 11e, and when one of the solenoid valves is energized, engine negative pressure is applied to the diaphragm actuator. , and when the other is energized, it supplies atmospheric pressure and adjusts the position of the damper 5 connected to the movable membrane of the diaphragm actuator.

Further, the resistance value of the potentiometer 14 changes in response to the displacement of the movable membrane of the diaphragm actuator in this actuator 6A.

In the illustrated control system, when the signal voltage 11a is applied, the actuator 6A and the potentiometer 14 move so that the signal voltage becomes a level between the reference signal voltages 11b and 11c. The damper 5 is positioned at a corresponding position and operates to determine the air distribution of the discharge ports 3 and 4 in proportions corresponding to this position.

Since the signal voltage 11b is determined by the resistance ratio of the optical sensor 7.8 and the division ratio of the variable resistor 9, the damper 5 may be affected by the strong solar radiation depending on which optical sensor the actual solar radiation is biased toward. The adjustment lever 9a of the variable resistance 9 is positioned so as to increase the blown air in the direction in which the
The position of the damper 5 can also be changed by operation.

Now, assuming that the variable resistance 90 division ratio is 1:1, the signal voltage 11a changes depending on the resistance ratio of the optical sensor 7.8, and the airflow distribution in the left and right direction inside the vehicle interior changes only according to the distribution of solar radiation. can be done.

When the variable resistance 90 division ratio is changed using the adjustable lever 9a in the housing, a signal voltage 11a is generated that indicates a solar radiation distribution that is more biased than the actual resistance ratio of the optical sensor 7.8, so that the solar radiation distribution can be adjusted according to the passenger's preference. - Air conditioning distribution can be adjusted by blowing air distribution.

Here, the amount of change in the air distribution with respect to the solar radiation distribution and the amount of change in the air distribution due to the variable resistor can be determined in advance based on the mutual magnitudes of the photoresistance characteristics of the optical sensor 7.8 and the resistance values of the variable resistor 9.

In this device, by employing the window comparator 11, even if the amount of solar radiation fluctuates within the dead zone defined by the two reference voltages, both reversible output signals 11d and 11e are generated in the actuator 6A. Therefore, the damper 5 does not change its position unnecessarily, and the occupant does not feel uncomfortable.

Note that 15 is an on-vehicle battery, 16 is an ignition switch, and 17 is an operation switch 17 for operating the air conditioning unit 1, and the illustrated control system operates depending on the operating state of the air conditioning unit 1.

In the above embodiment, the opening degree of the damper 5 is changed by the actuator 6 which adjusts the opening degree of the damper 5, but instead of the damper 5, the grill force direction of the air outlets 3 and 4 is changed. It's okay.

Although not particularly shown, a power amplification circuit may be provided between the control circuit 10 and the actuator 6 if necessary.

As described above, in the present invention, the air conditioning distribution can be controlled according to the actual solar radiation distribution and the occupant's preferences.
One advantage is that it can be easily implemented using a simple analog circuit configuration and an actuator.

Furthermore, since the present invention employs a window comparator with a dead zone, it is possible to use a photosensitive resistor element with a fast response, and in this case, it is possible to suppress undesired fluctuations in the air conditioning distribution due to noise light, and This has the effect of reducing the number of actuations of the actuator and increasing its durability.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, with FIG. 1 being an overall configuration diagram and FIG. 2 being an electrical wiring diagram showing an example of an electrical control system. 1... Air conditioning unit, 2... Duct, 3, 4...
Air outlet, 5... damper, 6, 6A... actuator, I,
8... Photosensitive resistance element (light sensor), 9... Variable resistor, 10... Control circuit, 11... Window comparator.

Claims (1)

[Scope of utility model registration request] A signal generator that generates a composite voltage according to the solar radiation distribution and air conditioning distribution, consisting of multiple photosensitive resistance elements that detect the solar radiation distribution to each part of the vehicle interior and variable resistors that set the air conditioning distribution of each part of the vehicle interior. a window comparator that generates a reversible output signal by comparing the composite voltage from the signal generating circuit with two reference voltages that set a dead zone; An air conditioning distribution control device for an automobile, comprising an actuator that changes indoor air conditioning distribution.