JPH0858350A - Air-conditioning air intake controller for automobile - Google Patents

Abstract

PURPOSE: To provide a control device automatically switching to internal air circulation without introducing the outside air in a range of running speed from stopping to low speed running, even during running with an outside air suction switch, for introducing the outside air into a car, left as turned on, in an air-conditioner for an automobile. CONSTITUTION: An output of a circuit by an automatic air suction control switch 1 and a resistor 2 is input to an AND gate 9 and NOT gate 10. An output of the NOT gate 10 is input to an AND gate 11. An output of a circuit by an automatic air suction control switch 3 and a resistor 4 is input to the AND gate 11. A signal of a speed sensor 5 is input to an amplifier 6, and its output is input to a comparator 8. An output of a reference voltage generator 7 is input to the comparator 8. An output of the comparator 8 is input to the AND gate 9. Outputs of the gates 9, 11 are input to an OR gate 12. An output of the gate 12 is input to an air suction controller 13. By an input condition of the controller 13, suction of inside or outside air is automatically selected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an air conditioning intake controller installed in an automobile.
That is, even when the vehicle is running with the outside air intake switch for taking in outside air into the vehicle turned on by the air conditioner installed in the vehicle, the running speed of the vehicle changes from the stopped state to the low speed. This is an air conditioning intake controller for automatically switching the inside air to the inside air intake that circulates the air inside the vehicle without taking the outside air into the vehicle until the traveling range.

[0002]

2. Description of the Related Art Conventionally, an air-conditioning intake controller installed in a vehicle is stopped by a signal or the like while traveling while the switch of the air-conditioning intake controller is taking in the outside air into the vehicle. In addition, there was a drawback that the exhaust gas emitted by the vehicle stopped in front was taken into the vehicle.

[0003]

DISCLOSURE OF THE INVENTION According to the present invention, when the own vehicle stops due to a traffic light or natural traffic, the own vehicle that is stopped or traveling at a low speed discharges the vehicle stopped before. It is an object of the present invention to provide an air-conditioning intake controller that can switch automatically without taking in exhaust gas and does not take in external exhaust gas into the vehicle.

[0004]

According to the present invention, the structure of an air-conditioning intake controller is characterized by sensing the vehicle speed, stopping the intake of outside air during normal traveling or low speed traveling, and automatically selecting intake of inside air. And

[0005]

[Function] The air-conditioning intake control switch 1 is switched to O
When set to N, automatic control is performed, and when set to OFF, manual switching is possible.

[0006]

【Example】

Outline and operation of each element (a) One of the output X1 of the circuit by the automatic intake control switch 1 of the air conditioner and the resistor 2 is input to the AND gate 9. (B) The other of the signals of (a) is passed through the NOT gate 10 and is input to the AND gate 11 having X1. (C) Input the output X2 of the circuit formed by the manual intake control switch 3 and the resistor 4 of the air conditioner to the AND gate 11. (D) The voltage V1 obtained by amplifying the signal of the speed sensor 5 which detects the vehicle speed and outputs the voltage V1 corresponding to the speed by the amplifier 6 is input to the comparator 8. (E) The reference voltage generator 7 is provided to output the reference voltage V2 of the speed and input it to the comparator 8. (F) The comparator 8 compares which of the signal V1 of (d) and the signal V2 of (e) is larger, and the result X3 is ANDed.
Input to the gate 9. (G) The output Y1 of the AND gate 9 is input to the OR gate 12. (H) The output Y2 of the AND gate 11 is input to the OR gate 12. (I) The output Z of the OR gate 12 is set to the intake controller 13
To enter. The state of each signal at this time is as follows. Signal X1 of (a): When switch 1 is ON, Hi when switch 1 is OFF, Lo (b) signal X1: When switch (1) is ON, Lo switch (1) OFF, signal of Hi (c) X2: Switch (3) ) When ON, Hi switch (3) When OFF Lo (d) signal X3: V1 <= V2 When Hi V1> V2 When Lo (e) signal X3: V1 <= V2 When Hi V1> V2 When both signals of Lo (f) Y1: X1 and X3 are Hi, signals of Hi (g) Y2: X1 are Lo, and when X2 is Hi, signals of Hi (h) Z: Y1, Y2 At least one is Hi. When Hi Z = Hi Inside air intake Z = Lo Outside air intake (i) The intake controller (13) automatically selects the intake method by the output Z from the OR gate (12).

[0007]

As described above, the following effects can be obtained by the air conditioning / intake controller of the present invention. First, since the exhaust gas emitted by the stopped vehicle before the stopped own vehicle is not sucked into the inside of the own vehicle,
It is very good for your health. Secondly, since it is automatically selected whether to inhale the outside air or to circulate the inside air, the operation is extremely simple.

[Brief description of drawings]

FIG. 1 is a block diagram of an air conditioning intake controller for an automobile according to the present invention.

[Explanation of symbols]

 1 automatic intake control switch 2 resistance 3 manual intake control switch 4 resistance 5 speed sensor 6 amplifier 7 reference voltage generator 8 comparator 9 AND gate 10 NOT gate 11 AND gate 12 OR Gate 13 Intake controller

Claims (1)

[Claims] 1. An intake controller for automatically switching an air conditioner (air conditioner) of a vehicle from outside air intake during traveling to inside air intake within a range of stop or low speed.