KR970006061B1 - Method and circuit for controlling position of rubber in airconditioner - Google Patents

Abstract

The upper and lower louver position control circuit compares the torques of a step motor for driving upper and lower louvers of an air conditioner, so that an optimized amount of indoor airflow can be discharged. The control circuit includes: the step motor(20) operated by a driving signal inverted and outputted by an inverter(20a) through an output port of a microprocessor(10); a torque signal detector(30) for detecting a voltage corresponding to torque signal variation upon the operation of the step motor(20); and the microprocessor(10) for converting the detected voltage detected from the torque signal detector(30) to control the position of the upper and lower louvers correspondingly to a digital signal.

Description

Up and down louver position control circuit and method of air conditioner

1 is a conventional upper and lower louver position control circuit diagram.

2 is a conventional vertical louver position control graph.

3 is a vertical louver position control circuit diagram of the present invention.

4 is a vertical louver position control graph of the present invention.

5 is a flow chart of the up and down louver position control operation of the present invention.

* Explanation of symbols for main parts of the drawings

10 microprocessor 20 step motor

20a: inverting section 30: torque signal detecting section

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position control circuit of a vertical louver of a cooling air conditioner and a control method thereof, and more particularly, to a circuit and a method for automatically discharging the best indoor air volume by comparing the torque of a stepper motor for driving the upper and lower louvers.

In general, louvers are installed at air inlets or outlets and used for air conditioners and the like as roof-shaped gratings for controlling air volume and air volume.

In order to adjust the position of such a louver, the configuration of the prior art, as shown in FIG. 1, when the cooling-only air conditioner starts to operate, the microprocessor 10 steps through its output ports D0, D1, D2, and D3. The upper and lower louvers are operated by driving the step motor 20 by outputting a pulse. The detailed operation thereof is performed when the air conditioner is initially started as shown in the upper and lower louver position control graph of FIG. 2 and the upper and lower louvers are closed to the P0 position. After moving, move to the position of P1 and stop.

Accordingly, when the operation is started, the position of the upper and lower louvers stops at a constant position unconditionally, so that the position of the louver does not discharge the most amount of air by the indoor fan FAN.

The present invention provides a top and bottom louver position control circuit and method for an air conditioner to realize a comfortable air-conditioning environment by setting a position of a top and bottom louvers capable of discharging the most air volume by an indoor fan in order to solve the above problems of the prior art. The purpose is to provide.

The present invention for achieving the above object will be described in detail with reference to the accompanying drawings.

The configuration and operation of the present invention according to FIG. 3 includes a torque signal detection unit 30 having a resistor R1 connected to an intermediate step of the step motor 20 to control torque during driving of the step motor 20. The voltage V1 changed by the current I1 due to the change is detected, and the detected voltage is converted into a digital value through an A / D converter built in the microprocessor 10 to store the memory in the microprocessor 10. Save it to

In response to the stored digital value, the microprocessor 10 outputs a step pulse through an output port to drive the step motor 20 through an inverting unit 20a composed of a plurality of inverters 1, 2, 3, and 4. To operate the upper and lower louvers.

When the torque received by the step motor 20 is small, the upper and lower louvers are in a position where air volume is well discharged. On the contrary, when the torque received by the step motor 2 is large, the upper and lower louvers are positions where the discharge of air volume is suppressed. If you are in.

Accordingly, when comparing the torque value at any predetermined position in the process of moving the upper and lower louvers, it can be controlled to the position to discharge the maximum amount of air volume by the indoor fan.

Referring to the flowchart of FIG. 5 with reference to the circuit diagram of the present invention described above, the first and second louvers are operated when the upper and lower louvers are driven down after the arrival time to an arbitrary reference position at which the maximum amount of air is discharged after the start of operation. When the reference position variation number n is arbitrarily set at the time of down operation of the up and down louvers, the reference number variation number n is the total number of the up and down louver positions set arbitrarily ( x) the second process of storing the torque value (A / D conversion value) of each position changed in correspondence with the predetermined position elapsed time ΔP in the storage location P (n) when less than or equal to the reference time; When the position variation frequency (n) is greater than the total number (x) of the upper and lower louver positions, a third process of comparing the stored torque values and controlling the upper and lower louvers to the maximum amount of air volume discharging positions corresponding to the highest value of the torque values is performed. .

When the above processes are described in more detail step by step, when the user starts to operate, the microprocessor 10 of the air conditioner checks whether the time of? S has elapsed (S1) and if the time of? S has elapsed, the maximum amount of air flow. The down operation of the up and down louvers is started in order to find a position where the light can be discharged (S2) and set to n = 1.

[Delta] S denotes an allowable time for the upper and lower louvers to reach the P1 position in FIG. 2 at the initial stage of operation of the upper and lower louvers in order to determine a reference position for finding a position for discharging the maximum amount of air flow. (S3) is set to '1' to store the A / D conversion value (or torque value) due to the change in torque at each position as shown in the upper and lower louver position graphs in FIG. It is to specify the base start.

When the reference position variation frequency (n) during the down operation of the up and down louvers is less than or equal to the total number (x) of the up and down louver positions arbitrarily set to find a position for discharging the maximum amount of air flow as shown in FIG. (n ≤ x) (S4), check whether the predetermined position elapsed time (△ P = P _n -P _{n + 1} ; elapsed time from the top and bottom louver position to the next position) has passed (S5) In FIG. 3, the voltage of V1 is A / D converted (S10) and stored continuously. If elapsed, the DELTA P timer is cleared (S6). Then, the place to store the next A / D conversion value is cleared (S7).

Next, the reference position change count n is increased (n + 1) (S8), the ΔP timer is operated (S9), and the up and down louvers arbitrarily set by the reference position change count n in step S4. Repeat until the total number of positions is greater than x.

This repetition is for storing the A / D conversion value (torque value in each storage location P (n)) at the respective positions of the upper and lower louvers.

On the other hand, when the reference position variation frequency (n) is larger than the total number x of randomly set up and down louver positions (S4), the initial value is set to 'n' to compare the A / D conversion values stored at each position. Is set to '0' and the respective storage location P (n) values are stored in the storage location P for storing the highest value among the A / D conversion values (S11).

Subsequently, when the value of the highest value storage location P is less than or equal to the value of the storage location P (n) among the A / D conversion values, the value 'P (n)' is stored in the 'P'. Next step S15 is performed.

At this time, the reference position variation count n is stored in a storage location MP for storing the position having the highest value (S14), and then the reference position variation is continuously compared to continuously compare the A / D conversion values at each position. The number of times n is increased (n + 1), and the total number x of randomly set up and down louver positions is compared with the reference position change number n (S16), and the reference position change number n is If the total number x is smaller (that is, nx), the process returns to the step S12.

However, when the reference position variation count n is compared with the total number x of the arbitrarily set up and down louver positions x, if the reference position variation count n is larger than the total number x (ie, nx), The storage place MP for storing the position having the highest value for indoor and air flow is set to a fixed position of the up and down louvers (S17), and the step motor 20 is driven to move the up and down louvers to the storage place MP. Move to the position of (S18).

As described above, the present invention automatically finds a position capable of discharging the maximum amount of air toward the room to the indoor fan within a short time, thereby enabling more powerful cooling, thereby providing a more comfortable cooling effect to the user.

Claims (4)

A step motor 20 operated by a drive signal inverted by the discharge unit 20a through the output port of the microprocessor 10 and a voltage corresponding to a torque signal change when the step motor 20 is operated are detected. Up and down louver position control circuit of an air conditioner composed of a torque signal detection unit 30 and a microprocessor 10 for converting the voltage detected by the coat signal detection unit 30 to control the up and down louver position corresponding to the digital signal. . After the start of operation, when the up and down louvers have elapsed the reaching time to an arbitrary reference position at which the maximum amount of air is discharged, the first step of driving down and the reference position variation number n during the down operation of the up and down louvers are randomly selected. When the reference position variation frequency (n) is less than or equal to the total number (x) of the arbitrarily set up and down louver positions compared to the total number (x) of the up and down louver positions, the predetermined position elapsed time (ΔP). Comparing the stored torque value with the second process of storing the torque value of each correspondingly changed position in the storage location P (n), and when the reference position variation frequency n is greater than the total number x of upper and lower louver positions; And a third process of controlling the upper and lower louvers to a maximum amount of air volume discharging positions corresponding to the highest value of the torque value. The method of claim 2, wherein the second process comprises the steps of: clearing a timer when the predetermined position elapsed time (ΔP) is hardened, and storing the torque value of the upper and lower louver positions in the storage place (P (n)) after the clearing. And clearing a storage location to store the next torque value, and operating the timer by increasing the reference position variation frequency (n). The upper and lower louver positions of the air conditioner according to claim 2 or 3, wherein the predetermined position elapsed time ΔP in the second process represents an elapsed time from a current upper and lower louver position to a next position. Control method.