KR940007187B1 - Method and circuit for controlling air conditioner - Google Patents

Abstract

The air conditioner operating circuit and control method comprises: an optical sensing circuit for sensing the brightness of a room, comparing the sensed brightness with a setting illuminance and generating an optical sensing value; a moving amount sensing circuit for generating a pulse signal by sensing a moving amount; and a microprocessor for implementing an automatic sleep operating function according to the outputs of the optical sensing circuit and the moving amount sensing circuit, thereby feeling agreeability.

Description

Comfortable driving circuit of air conditioner and its control method

1 is a hardware configuration of a conventional air conditioner.

2 is a flow chart showing a conventional sleep operation method.

3 is a comfortable driving circuit diagram of an air conditioner to which the present invention is applied. FIG. 4 is a characteristic curve graph of the photoconductive element of FIG.

5 is an output waveform diagram of the trigger pulse generator according to the movement of the human body

Figure 6 is a flow chart showing the bedtime driving control method of the present invention.

7 is a flow chart showing the activity detection control method of the present invention.

* Explanation of symbols for the main parts of the drawings

1,40: microcomputer 20: light sensing unit

30: activity detection unit 34: trigger pulse generator

CdS: photoconductive element S1: infrared sensor

The present invention relates to a comfortable driving circuit of an air conditioner for automatically driving to sleep so that the human body can feel comfortable by sensing the brightness of the room and the amount of activity of the human body and a control method thereof.

In general, the air conditioner for cooling and heating the room and keeping the indoor air in a pleasant state has a bedtime driving function, and prevents adverse effects on the biorhythm by preventing the body temperature of the sleeping body from rising or lowering by continuous operation.

1 is a hardware configuration diagram of a conventional air conditioner having such a sleep operation function, a microcomputer 1 for controlling the operation of the entire system, and a remote controller 2 for transmitting infrared signals corresponding to a selected key composed of various function selection keys. And controlling the drive of the compressor COMP or the fan motor FM under the control of the microcomputer 1 and the infrared receiver 3 which transmits the infrared signal from the remote controller 2 to the microcomputer 1. It consisted of the load drive part 4.

In the conventional air conditioner configured as described above, when the user selects a bedtime driving function and time by pressing a key of the remote controller 2, the microcomputer 1 of the indoor unit receives the key signal and sleeps as shown in the flowchart of FIG. Will start.

First, it is determined whether the sleep driving signal has been received in the step 11 of the microcomputer 1, and if the signal is received, the wind direction is kept in a low wind in step 12 to operate in a low noise state, and the sleep selected in step 13 is performed. It is determined whether the driving time n has elapsed, and the air conditioner is operated until the time n has elapsed, and then the operation is stopped in step 14.

However, this method has a problem that the user has to manually select the bedtime driving function and time, and there is a problem that it is difficult to select a suitable time in consideration of the time when the user is locked.

In addition, if the time before bedtime is set too long, the temperature of the human body increases or decreases during sleep, so there is a problem in that it is impossible to feel comfort or get sick.

Accordingly, an object of the present invention is to perform a bedtime driving function automatically by detecting the brightness of the room and to adjust the air volume, temperature and operation time according to the amount of activity of the human body during bedtime driving comfort of the air conditioner to feel comfortable It is to provide a circuit and a control method thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 to 7 as follows.

3 is a comfortable driving circuit diagram of an air conditioner to which the present invention is applied. As shown in FIG. 3, the light detecting unit 20 detects the brightness of the room and compares it with the actual illuminance, and detects the amount of activity of the human body to generate a pulse signal. It is composed of a microcomputer 40 for performing the comfortable driving control program of the present invention in accordance with the output of the activity detection unit 30, the light detection unit 20 and the activity detection unit 30.

Here, the photodetector 20 includes a photoconductive device CdS whose resistance value varies depending on the brightness of the attention, a resistor R1 connected to the photoconductive device CdS to distribute a power supply Vcc voltage, The output of the comparator COM and the output of the comparator COM comparing the sensed source voltage and the reference illuminance setting voltage with the resistor R2 and the variable resistor VR1 for setting the reference illuminance, and the intensity element CdS It consists of a resistor (R3) (R4) for transmitting to (40).

In the optical sensing unit 20 configured as described above, as shown in the characteristic curve of FIG. 4, the resistance value of the photoconductive element CdS varies according to the brightness of the room, and the resistance of the resistor R1 and the photoconductive element CdS is different. Sense voltage divided by value ( ) Is input to the inverting terminal (-) of the comparator (OOM), and the non-inverting terminal (+) has a reference voltage set by the resistor (R2) and the variable resistor (VR1). ) Is entered.

In this case, the reference voltage V2 of the comparator COM may be changed by adjusting the variable resistor VR1.

When the room is brighter than the set illuminance, since the resistance value of the photoconductive element CdS becomes small, V1 <V2, and a high potential signal is output from the comparator COM and input to the microcomputer 40.

On the contrary, when the room is darker than the set illuminance, the resistance value of the photoconductive element CdS increases, so that V1> V2 and a low potential signal is output from the comparator COM, so that the microcomputer 40 starts sleeping.

Meanwhile, in FIG. 3, the activity detector 30 includes an infrared sensor S1, a resistor R5, and a junction field effect transistor (TR1) that detect infrared light emitted from the human body and generate a voltage corresponding thereto. An infrared detector 31, a medium width 32 that amplifies the output signal of the infrared detector 31 to a predetermined level, a filter 33 that filters the output signal of the amplifier 32, and a filter And a trigger pulse generator 34 for converting the output signal of the unit 33 into a pulse signal and inputting it to the microcomputer 40.

Pyro-Sensor (S1) is the most sensitive to the infrared radiation having a wavelength of about 10μm generated in the human body to form a charge between the two ends of the sensor.

As the human body moves as shown in FIG. 5A, the trigger pulse generator 34 outputs a pulse signal having a predetermined width ta as shown in FIG. 5B, and the microcomputer 40 In this case, the number of pulse signals is counted to determine the actual temperature, the air volume of the indoor unit fan, and the sleep time according to the amount of activity.

6 is an operation flowchart showing the bedtime driving control method of the present invention.

As shown in FIG. 2, the microcomputer 40 determines whether the AI mode is in step 101, and determines whether the microcomputer 40 is currently in bedtime operation in step 102. When not in the sleep operation, it is determined in step 103 whether the low potential signal is continuously input for 10 seconds through the terminal 11, and when the low potential signal is maintained, the indoor light is actually turned off, not the noise. It is recognized that the sleep operation is started in step 104.

In other words, to lower the noise, the fan's air volume is driven by the breeze and the timer (30 minutes, 60 minutes, l20 minutes) for detecting the activity level is started.

In the case of the sleep operation, the low potential state holding time of the terminal 11 is checked once more in step 105, and if the low potential state is maintained for two consecutive seconds, the sleep operation continues.

If the low potential is not maintained for 2 consecutive seconds, it is determined whether the high potential signal is input for 30 consecutive seconds through the terminal 11 in step 106, and if it is the high potential for 30 consecutive seconds, it is determined that the user is not sleeping. Is cleared and all timers (30 minutes, 60 minutes, 120 minutes) are cleared.

7 is a flowchart illustrating an activity detection control method of the present invention.

First, the microcomputer 40 determines whether the artificial intelligence mode is in step 201, and determines whether the user is going to sleep in the artificial intelligence mode.

In the case of the sleep operation, it is determined whether 30 minutes set by the timer has elapsed in step 203, and after counting the number of pulses input through the terminal 12 of the microcomputer 4 for 30 minutes after the sleep operation starts, 30 After the minute has elapsed, the timer is cleared at step 204.

Next, the number of activity detection pulses counted is compared with the rust value (X> Y> Z), and the air volume and the set temperature of the fan are determined according to the result. In step 205, the number of activity detection pulses is compared with the X value. If the call value is greater than the X value, it is determined that the human body has more movements, and in step 206, the air volume of the fan is driven by the strong wind, focusing on the cooling capacity rather than the low noise, and the number of activity detection pulses is counted again for 30 minutes.

If the activity detection pulse is less than or equal to the X value, it is determined in step 207 whether the number of activity detection pulses is greater than the Y value. do.

If the activity detection pulse number is less than or equal to the Y value, it is determined in step 209 whether the activity detection pulse number is larger than the Z value. If the activity detection pulse number is greater than the Z value, the fan flow rate is operated by a breeze in step 201 and the set temperature is increased by 0.5 ° C. In step 21l, it is determined whether 120 minutes have elapsed by the timer. When 120 minutes have elapsed, the timer is cleared at step 214 and the air conditioner is stopped at step 215 to prevent overcooling.

If the amount of activity detection pulse is less than or equal to the Z value, it is determined as a full sleep state, and in step 212, the air volume is operated in a breeze state, the set temperature is increased by 11 ° C., and in step 213, 60 minutes are determined by the timer. When this time elapses, the timer is cleared at step 214, and the operation of the air conditioner is stopped at step 215 to prevent overcooling during sleep and to prevent body temperature drop.

The set values X, Y, and Z are experimental data values.

As described above, the present invention performs the bedtime driving function automatically according to the surrounding environment, so that the user's convenience can be achieved and the bedtime driving time is automatically adjusted according to the amount of activity. It is effective to prevent and feel comfortable.

Claims (3)

The light sensing unit 20 detects the brightness of the room with the photoconductive element CdS and compares the detected value with the set illuminance with the comparator COM, and outputs the result value as the light sensing value. Counting the output signal of the activity detection unit 30 and the light detection unit 20 and the activity detection unit 30 to generate a pulse signal by detecting the sleep signal operation function is automatically performed according to the result value of the entire system Comfortable driving circuit of the air conditioner, characterized in that it comprises a micom (40) for controlling the operation of. The infrared ray detector 31 of claim 1, wherein the active amount detector 30 detects infrared rays emitted from the human body by a pyroelectric infrared sensor S1 and generates a voltage corresponding to the detected amount through the JFET TR1. And an output signal of the filter unit 33 and the filter unit 33 for filtering the output signal of the amplifying unit 32, the medium width unit 32 that amplifies the output of the infrared detecting unit 31 to a predetermined level. Comfortable operation circuit of the air conditioner, characterized by comprising a trigger pulse generator 34 for converting the pulse signal of a predetermined width and input to the microcomputer 40 In AI mode, it checks whether it is going to go to bed, and if it is not going to go to sleep, it determines whether the room is dark under the set illumination and starts sleep when it gets dark. The sleep operation control step of releasing the sleep operation when it is checked and brightened, and if the sleep operation is started, checks whether the amount of activity is detected while checking the elapsed amount of time, and counts the amount of pulses each time a certain time elapses. Determining the amount of air and the set temperature corresponding to the operation is performed according to the activity amount control step of controlling the amount of activity to stop after driving for a set time in the case of less active or sleep.