KR950001479B1 - Method of controlling cold condition of air conditioner - Google Patents

Abstract

The method judges the size of the cooling room space and the cooling load to control the driving of a compressor and a blast fan according to a load changing and the size of cooling room space to obtain the most comfortable cooling room. The method includes a first step for sensing an indoor temperature for a given time, computing its temperature changing ratio, and judging the cooling room's size; a second step for computing the indoor temperature changing ratio and judging the cooling room load amount from a large and small changing ratio and the size of the judged cooling room space; and a third step for performing controls of increase/reduction of a set cooling room temperature and a set wind amount.

Description

Air Conditioning Control Method

1 is a block diagram of a control circuit of an air conditioner for performing the cooling control method of the present invention.

2 is a flow chart of a method for determining the size and cooling load of the cooling space in the cooling control method of the present invention.

3 is a flow chart of the compressor and the air flow control method according to the size and cooling load of the cooling space in the cooling control method of the present invention.

Figure 4a is a table of the cooling load setting relationship according to the size and temperature change rate of the cooling space in the present invention, b is a diagram of the air volume relationship of the set cooling temperature according to the size and cooling load of the cooling space in the present invention.

* Explanation of symbols for main parts of the drawings

1: remote control transmitter 2: remote control receiver

3: room temperature sensing unit 4: microcomputer

5: indoor fan 6: compressor

The present invention relates to a cooling control method of an air conditioner, and in particular, to determine the size and cooling load of the cooling space to control the operation of the compressor and the blower fan according to the size and load of the cooling space to achieve the optimal comfort air conditioning It relates to a cooling control method of.

In the conventional air conditioner, the user sets the air flow rate and the cooling temperature, the microcomputer senses the temperature of the indoor cooling space and compares the air flow with the set air flow to control the operation of the compressor and control the air flow through the stepwise driving of the blower fan. However, it is difficult to provide the user's desired cooling because the cooling control is performed by comparing the set value and the simple comparison without considering the size or cooling load of the cooling space.In the case where the cooling space is large, the indoor temperature slows down. The longer the time the compressor is on, the higher the power consumption. If the cooling load is changed, such as when a window is open or the room heat is large, the set cooling temperature must be adjusted accordingly. There is this.

The present invention can provide a comfortable indoor environment by detecting the size of the cooling space and the variation of the cooling load and adjusting the air volume variably in accordance with the size and cooling load of the cooling space. It is possible to reduce the power consumption by eliminating the cooling cycle, and to provide a cooling control method of the air conditioner that enables the user to eliminate the trouble of resetting the temperature and air volume through the key operation when the cooling load changes. Referring to the configuration of the cooling control apparatus according to the present invention with reference to the drawings as follows.

1 shows a configuration of a cooling control circuit of an air conditioner according to the present invention, a remote control transmitter 1 for remote control of an air conditioner, a remote control receiver 2 for receiving and converting a transmitted remote control signal into an electrical signal; Temperature sensing unit 3 for sensing the temperature of the indoor cooling space, the microcomputer (4) to perform the cooling operation / stop control according to the received remote control signal and the detected indoor temperature, and the control of the microcomputer (4) It is composed of a compressor (5) for receiving the cooling and the indoor blowing fan (6) for discharging the cold air into the indoor space under the control of the microcomputer (4), the operation is as follows.

When the user operates the key of the remote control transmitter 1 to instruct the cooling operation and sets the cooling temperature and the air volume, the temperature sensing unit 3 which the microcomputer 4 decodes the key operation signal received from the remote control receiver 2 is used. While the indoor temperature is sensed, the compressor 5 is operated / stopped and the fan 6 is driven to perform the cooling operation so that the set cooling temperature and the air volume are maintained.

The air conditioner control method of the air conditioner of the present invention carried out in the above-described operation, by detecting the room temperature for a predetermined time after the initial operation start calculates the temperature change rate and the size of the cooling space according to the magnitude of this change rate After the determination of the first process and the size of the cooling space of the first process is completed, the rate of change of the temperature of the room for a predetermined time is calculated to determine the cooling load amount from the magnitude of the change rate and the determined size of the cooling space. In order to perform a cooling cycle and a supply of air volume appropriate to the size and cooling load of the cooling space obtained in the second process and the first and second processes, control of increasing / decreasing the set cooling temperature and increasing / decreasing of the set air volume are performed. It consists of a third process.

The cooling control method of the present invention thus constructed is divided into three types of large (medium), small (small), and small cooling medium (room load). When the cooling control is performed by dividing into three types of medium, medium, and small, the following description will be given with reference to FIGS. 2 to 4 as an example.

First, FIG. 2 shows an embodiment of the first process and the second process in the present invention. In FIG. 1, the microcomputer 4 instructs the cooling operation through the key operation of the remote control transmitter 12. When the air volume is set, the microcomputer 4 determines whether the AI is currently operating (automatic cooling control corresponding to temperature sensing).

As a result of the determination, if the artificial intelligence is running, the compressor 5 determines whether the compressor is currently operating (ON;

At this time, the size of the compressor is checked only when the compressor 5 is operated for the first time after the operation is started, and the compressor 5 is operated for the first time, waiting for a predetermined time (t1) to secure a stable time of the compressor (5). When the discharged air is raised to a temperature suitable for detection, the room temperature detected by the temperature sensing unit 3 is set at a temperature T1 for determining the size of the room. Set as a reference value).

When the indoor temperature reaches the set temperature (T1), the timer in the microcomputer (4) is started to continuously count the detection time (l1) of the temperature change rate and the timer time (t2) during the set time (l1). After storing the temperature in the register (A), the timer time (t2) is cleared and compared with the reference number (m) set to determine the average size check count.

If the reference number (m) is exceeded, the number of checks is cleared and returned. If the reference number is less than or equal to one, the number of checks is increased by +1, and the temperature change value (ΔT = t1 ℃ -A ℃) during the set time (ℓ1) is timed. Calculate the rate of change in temperature per hour (△ T1 / ℓ1) by dividing by (ℓ1) and compare this temperature change rate (△ T1 / ℓ1) with the reference rate of change (n1) (n2) (where n1> n2) do.

As a result of the comparison, if the temperature change rate (△ T1 / ℓ1) is greater than or equal to the standard change rate (n1), the weight size weight (SUM) is increased by +3, and the temperature change rate (△ T1 / ℓ1) is less than or equal to the reference change rate (n1), n2) or more, the size weight weight SUM is increased by +2, and when the temperature change rate ΔT1 / L1 is less than or equal to the standard change rate n2, the size weight weight SUM is increased by +1.

The above process is repeated until the check size is set (m), and when the set number (m) is reached, the average temperature change rate is calculated by calculation of SUM / m, and the calculated average temperature change rate (SUM / m) is calculated. It compares with magnitude judgment reference value K1 (K2) (K1> K2).

As a result of the comparison, if the average value of temperature change rate (SUM / m) is more than the reference value (K1), it is determined that the size is large (set to the size of the size of the chamber), and if it is less than the reference value (K1) and more than the reference value (K2), the size is Is determined to be the medium size (set to medium size), and if it is less than or equal to the reference value (K2), it is determined that the size is small. Check the size to be small and clear the weight (SUM). Determines the size check completion (corresponding flag set). In this manner, the first process of the present invention described above is completed.

When the check of the size is completed, the second process of the present invention is performed to determine the cooling load (load).

That is, as shown in FIG. 2, if the size check is completed in the state of artificial intelligence operation and the compressor is turned on, the indoor temperature detected by the temperature sensing unit 3 is compared with the set temperature T2 for determining the load. The set temperature (T2) is set as a reference value for measuring the rate of change of temperature because a difference occurs in the temperature change of the room according to the size of the room, frequent entry, opening and closing of the window.

As a result of the comparison, when the indoor temperature reaches the set temperature (T2), the timer is operated to continuously count the timer time (t3) during the detection time (l2) of the temperature change rate, and when the set time (l2) is reached, the detected indoor temperature is detected. After storing in the register B, the temperature change rate (ΔT2 / L2) per hour is obtained by dividing the temperature change value (ΔT2 = T2 ° C-B ° C) during the set time (l2) by the time (l2).

The temperature change rate ΔT2 / l2 is compared with the reference value n3 (n4) (where n3> n4) of the load determination and the temperature change rate ΔT2 / l2 is equal to or larger than the reference value n3. When the size obtained is detected and the size of the room size is close, the load is set to medium weight and the timer time (t3) is cleared and returned. Set the load to the maximum and return after clearing the timer time (t3).

On the other hand, if the temperature change rate ΔT2 / ℓ2 is equal to or less than the reference value n3 and equal to or greater than the reference value n4, the size of the change is determined by searching for the size obtained in the first step. Set to small and clear after timer time (t3). If the size is full or small, set the load to zero and return after clearing the timer time (t3).

As a result of the comparison, if the temperature change rate ΔT2 / l2 is less than or equal to the reference value n4, the size of the load is set to small when the size of the chamber is large or medium. After the timer period t3 is cleared, it returns. If the size is small, the load is set to idle and the timer time t3 is cleared and returned.

In this way, the cooling load amount is determined for each room size, and FIG. 4A is an example of a load amount determination result discharged through this process.

FIG. 3 shows the implementation of the third process of the present invention by performing the drive control of the compressor 5 and the fan 6 in response to the size obtained in FIG. 3 and the load amount (load load) which varies according to the size of the room. Yes.

First, if the microcomputer 4 determines whether the artificial intelligence operation is performed and the user does not instruct the artificial intelligence operation, the compressor 5 and the fan 6 are driven with the set warmth and air volume. In the case of incomplete completion, the general artificial intelligence operation is performed regardless of the change in cooling load, and in the case of completion of the check of the size, the completion of the load check is determined. If the load is not checked, if the load is not checked, search the already determined size, and if the size is medium or small, operate the set temperature and air volume as it is. In this case, set the new cooling temperature (reference value of temperature judgment) by lowering the predetermined temperature (D1 ℃) (D1 ℃ in case of large size of cooling, and lowering and re-adjusting the lowering of the preset temperature due to the large amount of cooling). Cooling operation is performed at the preset air flow rate.

On the other hand, if the load has been checked, the size of the room already determined is searched.

If the size of the room is "large", set the new cooling temperature by lowering the predetermined temperature (D1 ℃) from the set temperature, and search for the load to operate at the set wind volume if the load is medium or low. If the load is very large, the air flow is increased by one stage, and the air flow rate is increased by one step. When the indoor temperature reaches the set temperature, the air volume increased by one stage is reduced to the set air volume.

As a result of the size determination, when the size is “middle”, the load is determined while maintaining the set temperature. If the load is low, operate the airflow by one step down.If the load is under load, operate the air with the set wind. If the load is high, operate the airflow by one step until the room temperature reaches the set temperature. After increasing operation, if it reaches the set temperature, it reduces to the set air volume.

As a result of the determination of the size of the room, if the size of the room is small, the load is judged. If the room is the maximum load, the air flow is increased by one step until the room temperature reaches the set temperature while maintaining the set temperature After the operation, if the set temperature is reached, reduce the set air volume.

If the load is low and the load is low or low, the set temperature is increased to the predetermined temperature (D2 ℃) and the new cooling temperature is set. If it is so, operate it by decreasing the air volume by one step.

As such, the size of the room is controlled by controlling the set cooling temperature and the air volume for each load to enable the optimal cooling control, and FIG. 4B is a result of the set temperature and the air volume derived through this process.

As described above, according to the present invention, the size of the cooling space is subdivided during operation and the set temperature is varied according to the size thereof, so that the cooling space is large when the size of the cooling space is large, and the overcooling prevention is small. Therefore, unnecessary operation / stop of the compressor can be prevented, thereby reducing power consumption, and the life of the compressor can be extended.

In addition, the average size is used to determine the size of the room, which is highly accurate and precise cooling control is possible, and it can adjust the air volume appropriately by actively coping with temporary load fluctuations, so that it can adjust the pleasant indoor environment. Because it is made, it is possible to make the operation and use of the device convenient.

Claims (10)

The first step of detecting the room temperature for a predetermined time after the initial operation and calculating the temperature change rate and determining the size of the cooling space according to the magnitude of the change rate, and after the determination of the size of the cooling space of the first step is completed The second process of determining the cooling load amount from the magnitude of the change rate and the determined cooling space size by calculating the rate of change of the room temperature over time, and the size and cooling load of the cooling space obtained in the first and second processes. A cooling control method of an air conditioner comprising a third process of controlling the increase / decrease of the set cooling temperature and the increase / decrease control of the set air volume so that a proper cooling cycle and air volume supply are made. The air conditioner control method of claim 1, wherein after the initial operation is started in the first step, the compressor waits for a predetermined time period during which the compressor can be stabilized and detects and calculates a rate of change of the room temperature. The air conditioner according to claim 1, wherein the rate of change of room temperature in the first step is obtained by calculating a difference in temperature after the initial detection temperature and a predetermined time elapse, and dividing the temperature difference by a detection time to calculate a temperature change rate. Cooling control method. The method of claim 1, wherein the rate of change of the room temperature in the first process is repeatedly detected and calculated a predetermined number of times, and the average value is determined to determine the average value as the final rate of change of temperature. . The method of claim 1, wherein the size determination of the cooling space in the first process compares the calculated temperature change rate with predetermined reference values, and gives different weights according to the comparison result to give a final sum of the weights. The air conditioner control method of the air conditioner characterized by obtaining the size of the cooling space by comparing with a predetermined reference value. The air conditioner according to claim 1, wherein the rate of change of room temperature in the second process is obtained by calculating a difference in temperature after the initial detection temperature and a predetermined time elapse, and dividing the temperature difference by a detection time to calculate a temperature change rate. Cooling control method. The method of claim 1, wherein the determination of the cooling load in the second process comprises comparing the calculated temperature change rate with predetermined reference values and comparing the magnitude with each other according to the size of the cooling space even in the case of the same magnitude. Air conditioning control method characterized in that determined by. The method of claim 1, wherein the increase / decrease control of the set cooling temperature in the third process is performed by resetting the set temperature by decreasing the predetermined temperature as the size of the cooling space increases, and setting temperature as the cooling load is smaller with the size of the cooling space. Cooling control method of the air conditioner, characterized in that to reset by increasing the predetermined temperature. The method of claim 1, wherein in the third process, the increase / decrease control of the set air volume is reset by increasing the set air volume by a predetermined step as the cooling load is increased along with the size of the cooling space, and the cooling load is small with the size of the cooling space. Cooling control method of the air conditioner, characterized in that the set down the set wind volume down by a predetermined step. The air conditioner control method according to claim 9, wherein when the indoor temperature reaches the set temperature by operating with the reset air volume, the air volume set before the increase / decrease control of the set air volume is reduced.