KR100766177B1 - Method for controlling operating of air conditioner - Google Patents

Abstract

A method for controlling operation of an air conditioner is provided to prevent deterioration of the compressor or burst on a pipe caused by over increase of discharge temperature and pressure of the compressor by lowering the speed of discharge pressure increase, such that the pressure equilibrium is achieved and then gradually increasing the operation frequency of the compressor to the calculated reference operation frequency. A method for controlling operation of an air conditioner comprises the steps of: calculating heating/cooling load based on the indoor and outdoor temperatures of the air conditioner and temperature difference between indoor temperature and predetermined temperature(406,408,410); calculating a reference operation frequency of a compressor based on the calculated cooling/heating load(412); achieving pressure equilibrium by driving indoor/outdoor fans for a predetermined first period of time while setting the operation frequency of the compressor to 0Hz, when the operation start signal of the air conditioner is applied(414,416,418); operating the compressor for a predetermined second period of time while setting the operation frequency of the compressor as a first frequency(420,422); operating the compressor for a predetermined third period of time having a second frequency lower than the calculated operation frequency and higher than the first frequency(424,426); operating the compressor for a predetermined fourth period of time having a third frequency lower than the calculated reference operation frequency and higher than the second frequency(428,430); and operating the compressor in the calculated reference operation frequency.

Description

Operation control method of air conditioner {METHOD FOR CONTROLLING OPERATING OF AIR CONDITIONER}

1 is a structural diagram of a typical air conditioner system,

2 is a time chart for explaining the starting operation of the air conditioner in two sections according to the conventional method,

3 is a block diagram of an air conditioner operation control apparatus suitable for applying the operation control method of the air conditioner according to the present invention;

Figure 4 is a flow chart illustrating a process of controlling the operation of the air conditioner according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

302: indoor temperature sensor 304: outdoor temperature sensor

306: operation block 308: control block

309: memory block 310: electronic expansion valve drive block

312: indoor fan drive block 314: outdoor fan drive block

316: Compressor Drive Block

The present invention relates to a method for controlling the operation of an air conditioner, and more particularly, an air conditioner suitable for controlling the start-up operation of a compressor in an air conditioner that adjusts the operation capacity of the compressor based on a temperature difference between an indoor temperature and a set temperature. It relates to a driving control method.

As is well known, typical air conditioners are, by way of example, of the type shown in FIG.

Referring to FIG. 1, a typical air conditioner includes an outdoor unit 110 and an indoor unit 120. The outdoor unit 110 includes a compressor 111, a four-way valve 112, and an outdoor heat exchanger 113. ), An electronic expansion valve 114, an accumulator 115, an outdoor fan 116, and the like, and the indoor unit 120 includes an indoor heat exchanger 121, an indoor fan 123, and the like.

In the air conditioner of the typical structure as described above, in the case of the cooling operation, the high-temperature, high-pressure gas refrigerant compressed by the compressor 111 is passed through the four-way valve 112 to the outdoor heat exchanger 113 functioning as a condenser. The introduced high pressure gas refrigerant is condensed to a high pressure state through heat exchange with outdoor air having an outdoor temperature of a lower temperature than the refrigerant through the outdoor heat exchanger 113. Here, the outdoor fan 116 is driven by an outdoor fan motor (not shown) to provide a function of forcibly blowing outdoor air.

As such, the gas refrigerant condensed in the high pressure state is converted into the liquid refrigerant in the low temperature and low pressure state by the throttling action while passing through the electronic expansion valve 114, and then transferred to the indoor heat exchanger 121 of the indoor unit 120. Here, the indoor fan 123 is driven by an indoor fan motor (not shown) to provide a function of forcibly blowing indoor air.

Subsequently, the liquid refrigerant evaporates through heat exchange with the room temperature in the indoor heat exchanger 121 which functions as an evaporator, and the low-temperature, low-pressure gas refrigerant, which has been evaporated, enters the outdoor unit 110 again and is a 4-way valve. The low-temperature, low-pressure gas refrigerant passing through the four-way valve 112 passes through the accumulator 115 and operates in a circulation structure flowing back into the compressor 111. Here, the accumulator 115 provides a function of converting the refrigerant flowing into the compressor 111 into a gas in a completely gaseous state.

In addition, in the air conditioner having a typical structure, in the heating operation, the refrigerant flow direction of the four-way valve 112 is switched to allow the refrigerant to flow in a direction opposite to the above-described cooling operation, which serves as the indoor heat exchanger 121. Unlike the cooling operation, since the condenser becomes a condenser, the air warmed by the indoor fan 123 is recycled to the room. That is, the refrigerant flow in the heating operation is the compressor 111 → four-way valve 112 → indoor heat exchanger 121 → electromagnetic expansion valve 114 → outdoor heat exchanger 113 → four-way valve 112 → accumulator 115 is a circulation structure of the compressor 111.

On the other hand, the air conditioner that adjusts the operation capacity of the compressor according to the temperature difference between the room temperature and the set temperature using the refrigerant circulation structure as described above, if the compressor is operated (driven) at the target frequency from the beginning at the time of starting, Problems such as damage to the compressor, vibration and noise will occur.

Therefore, according to the related art, a method of driving the compressor by changing the operating frequency of the compressor and the opening degree of the electromagnetic expansion valve in two stages according to the starting algorithm of the variable speed compressor.

That is, as an example, as shown in FIG. 2, the operation frequency of the compressor is divided into a first starting frequency A and a second starting frequency B of different frequencies, and correspondingly, the electromagnetic expansion valve is operated. The driving is divided into a first start electromagnetic expansion valve opening degree a and a second start electromagnetic expansion valve opening degree b. That is, the first starting electromagnetic expansion valve opening degree (a) is opened during the first starting frequency (A) section and the second starting electromagnetic expansion valve opening degree (b) is opened during the second starting frequency (B) section to operate the user. Operate at the set frequency and set opening value appropriately set according to the heat load according to the set temperature.

However, as described above, in the conventional method of operating the compressor by dividing the operating frequency of the compressor and the opening of the electromagnetic expansion valve into two stages, the load of the compressor suddenly increases due to a sudden increase in indoor and outdoor temperature conditions, or the amount of refrigerant in the air conditioner. Due to the excessive rise of the compressor discharge temperature and the increase in pressure that occur when the leakage is reduced, there is a fundamental problem that may cause damage to the compressor or cracks in the pipe.

In addition, in the conventional system, due to the characteristics of the compressor which can only be a vibration source during operation, the excessive pressure rise due to the above-described causes and the like acts as a cause of fatigue failure of the discharge pipe.

Accordingly, the present invention is to solve the above problems of the conventional method, and in response to the operation start signal before and after the compressor operation by the indoor and outdoor fan drive in advance to establish a pressure balance of the indoor and outdoor, and then to adjust the operating frequency of the compressor optimally An object of the present invention is to provide an operation control method for an air conditioner capable of realizing a compressor starting condition.

The present invention according to one embodiment for achieving the above object is a method for controlling the startup operation of an air conditioner using a compressor, the temperature measured indoors and outdoors of the air conditioner and the temperature difference between the room temperature and the set temperature. A first process of calculating an indoor air conditioning load based on a value, a second process of calculating a reference operating frequency of the compressor based on the calculated air conditioning load, and an operation start signal of the air conditioner, A third process of adjusting the pressure balance by driving the indoor / outdoor fan for a preset first time with the operating frequency of the compressor at 0 kHz, and a second preset time with the operating frequency of the compressor as the first set frequency; During the fourth process of driving the compressor, the operating frequency of the compressor is less than the calculated reference operating frequency and A fifth process of driving the compressor for a preset third time with a second set frequency greater than a first set frequency, and an operating frequency of the compressor smaller than the calculated reference operating frequency and greater than the second set frequency; And a sixth step of driving the compressor for a fourth predetermined time at a third set frequency, and a seventh step of driving the compressor at the calculated reference driving frequency. do.

According to another aspect of the present invention, there is provided a method of controlling a startup operation of an air conditioner using a compressor, the temperature measured between indoors and outdoors of the air conditioner, and a temperature difference between a room temperature and a set temperature. A first process of calculating an indoor air conditioning load based on a value, a second process of calculating a reference operating frequency of the compressor based on the calculated air conditioning load, and an operation start signal of the air conditioner, A third process of adjusting the pressure balance by driving the indoor / outdoor fan for a preset first time by setting the operating frequency of the compressor to 0 kHz, and by setting the preset operating frequency at least smaller than the calculated reference operating frequency. A fourth step of driving the compressor for two hours, and the calculated reference frequency of the operating frequency of the compressor Performing a fifth process of driving the compressor for a preset third time with an intermediate value between all frequencies and the immediately preceding operating frequency; and repeating the fifth process by a predetermined Nth order (N is an integer greater than 1). And a sixth process and a seventh process of driving the compressor at the calculated reference operation frequency when the preset N-th iteration is completed.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The core technology of the present invention is different from the above-described conventional method in which the operation frequency of the compressor and the opening degree of the electromagnetic expansion valve are divided into two stages, and the temperature difference between the indoor and outdoor temperatures, the indoor temperature and the set temperature when the power is applied. A reference operating frequency is calculated using the values and the respective correction coefficient values, and when the operation start signal is applied, the indoor and outdoor fans are driven to first adjust the indoor and outdoor pressure balance, and then the compressor operating frequency is gradually increased gradually. By controlling the compressor starting operation by raising the operating frequency, it is possible to easily achieve the object of the present invention through this technical means.

3 is a block diagram of an air conditioner operation control apparatus suitable for applying the operation control method of the air conditioner according to the present invention, the indoor temperature sensor 302, outdoor temperature sensor 304, operation block 306, A control block 308, a memory block 309, an electronic expansion valve drive block 310, an indoor fan drive block 312, an outdoor fan drive block 314, a compressor drive block 316, and the like.

Referring to FIG. 3, the room temperature sensor 302 is mounted to a predetermined portion of the indoor unit 120 shown in FIG. 1 as an example to measure room temperature, and the room temperature measured here is a control block 308. The outdoor temperature sensor 304 is mounted to a predetermined portion of the outdoor unit 110 shown in FIG. 1 to measure the outdoor temperature, and the outdoor temperature measured here is the control block 308. Is passed to.

In addition, the operation block 306 includes a plurality of operation buttons for selecting a power supply, an operation mode (a cooling operation mode, a heating operation mode, etc.), a set temperature, a set wind amount, and the operation information, for example. As such, the various driving information generated by the user operation is transferred to the control block 308.

Next, the control block 308 performs the overall operation control of the air conditioner, including, for example, a microprocessor, to determine the correction coefficient values of the indoor and outdoor temperatures, and to compare the indoor temperature with the set temperature. A function of determining a correction coefficient value for the temperature difference value is provided. For this purpose, the memory block 309 stores the correction coefficient values for the indoor temperature, the outdoor temperature, and the temperature difference value in a table form.

In addition, the control block 308 calculates the indoor heating and cooling load based on the predetermined heating calories, the predetermined heating calories and the determined respective correction coefficient values, and calculates the reference operating frequency of the compressor based on the calculated indoor cooling and heating loads. And adaptively control the startup operation of the compressor based on the calculated reference operation frequency. Here, the cooling calories and heating calories are fixed values determined according to the capacity of the indoor unit.

In addition, the control block 308 adaptively (step / incremental) control the operation of the indoor fan, outdoor fan, electronic expansion valve, compressor, etc. for the operation control according to the present invention, the details of these processes will be described later This will be described in detail with reference to FIG. 4.

Next, the electromagnetic expansion valve drive block 310 adjusts the opening degree of the electromagnetic expansion valve 114 shown in FIG. 1 in response to the opening value control signal provided from the control block 308, and the indoor fan drive block ( 312 controls the drive of the indoor fan 123 shown in FIG. 1 in response to the indoor fan drive control signal provided from the control block 308, and the outdoor fan drive block 314 is provided from the control block 308. In response to the outdoor fan drive control signal being controlled to control the driving of the outdoor fan 116 shown in FIG. 1, the compressor drive block 316 is set the operating frequency in response to the compressor drive control signal provided from the control block 308 It provides a function such as controlling the operation of the furnace 111.

Next, a series of processes for performing operation control according to the present invention using the operation control apparatus of the air conditioner having the above-described configuration will be described.

4 is a flowchart illustrating a process of controlling the operation of an air conditioner according to an exemplary embodiment of the present invention.

Referring to FIG. 4, when a power-on signal is input, that is, a power-on signal from the operation block 306 according to a user's operation while the air conditioner is performing the standby mode (standby power mode) (steps 402, 404), The indoor temperature sensor 302 measures an indoor temperature (indoor air temperature) Tai and provides it to the control block 308, and the outdoor temperature sensor 304 measures and controls an outdoor temperature (outdoor air temperature) Tao Provided to block 308 (step 406).

In response, the control block 308 determines the correction coefficient value FTai of the indoor temperature and the correction coefficient value FTao of the outdoor temperature with reference to the correction coefficient value table stored in the memory block 309, and also determines the indoor temperature. And a correction coefficient value FdT with respect to the temperature difference value dT of the set temperature (user set temperature) (step 408). Here, each correction coefficient value refers to correction coefficient values for adjusting the operating frequency of the compressor.

To this end, the memory block 309 stores correction coefficient values in the form of a table, and the correction coefficient values may be defined as shown in the following table as an example.

cooling heating Tai FTai_c Tai FTai_h Tai≤16 0.80 30≤Tai 0.85 16 <Tai≤18 0.85 25≤Tai <30 0.90 18 <Tai≤23 0.90 23≤Tai <25 0.95 23 <Tai≤24 0.95 18≤Tai <23 One 24 <Tai 1.00 Tai <18 1.1

cooling heating Tao Tao_c Tao Tao_h Tao≤23 0.75 19≤Tao 0.8 23 <Tao≤24 0.80 16≤Tao <19 0.85 24 <Tao≤29 0.85 13≤Tao <16 0.9 29 <Tao≤30 0.90 10≤Tao <13 0.95 30 <Tao≤39 1.00 5≤Tao <10 One 39 <Tao 0.93 -1≤Tao <5 1.03 - Tao <-1 1.15

cooling heating dT FdT_c dT FdT_h 2.0 <dT 1.0 3≤dT 0 1.0 <dT≤2.0 0.8 2.5≤dT <3 0.1 0.0 <dT≤1.0 0.5 2.0≤dT <2.5 0.2 -1 <dT≤0.0 0.1 1.5≤dT <2.0 0.3 dT≤-1.0 0.0 1.0≤dT <1.5 0.5 - 0.5≤dT <1.0 0.7 0.0≤dT <0.5 0.8 dT <0.0 One

In each of the above tables, [Table 1] is an example of the room temperature correction coefficient values for the compressor frequency adjustment in cooling and heating operation, and [Table 2] is the outdoor temperature correction for the compressor frequency adjustment in cooling and heating operation. An example of coefficient values is shown in Table 3, which is an example of correction coefficient values for temperature difference values between a room temperature and a set temperature in cooling and heating operations.

Next, the control block 308 corrects the preset cooling calories Qc, the preset heating calories Qh, the correction coefficient value FTai of the indoor temperature, the correction coefficient value FTao of the outdoor temperature, and the temperature difference value. Based on the coefficient value FdT, the indoor air conditioning load Q is calculated as shown in Equation 1 below (step 410).

Subsequently, the control block 308 calculates the reference operating frequency Fb for the operation of the compressor as shown in Equation 2 below based on the indoor air conditioning load Q calculated through Equation 1 (step 412). ). In Equation 2 below, Fb is a function of the load Q.

In general, the operating frequency of the compressor in the air conditioner is about 30 kHz to 70 kHz for cooling operation and about 30 kHz to 95 kHz for heating operation. Accordingly, the control block 308 calculates the reference operating frequency of the compressor within the range of 30 Hz to 70 Hz for the cooling operation, and calculates the reference operating frequency of the compressor within the range of 30 Hz to 95 Hz for the heating operation. will be.

That is, in the present invention, the reference operating frequency for the operation of the compressor is calculated through the series of processing as described above when the power is applied.

Next, in the control block 308, after calculating the reference driving frequency, it is checked whether the operation start signal, that is, the operation start signal according to the user's operation (or scheduled setting), is input from the operation block 306 (step). 414), if it is determined that the operation start signal is input, the control block 308 changes the opening value of the electromagnetic expansion valve 114, and adjusts the direction of the four-way valve 112 according to the operating conditions. At the same time, the indoor fan 123 and the outdoor fan 116 are operated for a predetermined time (steps 416 and 418). At this time, the operating frequency of the compressor 111 is 0 kHz. In step 418, reference numeral t1 denotes a predetermined first time (eg, 1 minute, etc.), and n1 denotes an elapsed time.

Here, operating the indoor fan 123 and the outdoor fan 116 for a preset first time without driving the compressor immediately when the operation start signal is inputted causes the indoor and outdoor pressure balance to be adjusted before the compressor 111 is driven. To adjust it.

Subsequently, if it is determined that the first preset time t1 has elapsed as a result of the check in step 418, the control block 308 sets the operating frequency of the compressor 111 to the first set frequency m1 (( For example, the compressor 111 is driven at 30 Hz, and the like, and the driving of the compressor by the first set frequency is performed for a preset second time (for example, one minute or the like) (steps 420 and 422). In step 422, reference numeral t2 denotes a preset second time at which the compressor 111 is driven at the first preset frequency, and n2 denotes an elapsed time.

Again, if it is determined in step 422 that the preset second time t2 has elapsed, the control block 308 sets the operating frequency of the compressor 111 to the second set frequency m2 ㎐. For example, the compressor 111 is driven using the second set frequency existing between the calculated reference operating frequency and the first set frequency m1 kHz. The driving of the compressor by the second set frequency is performed by the preset third frequency. It proceeds for a time (eg 1 minute, etc.) (steps 424, 426). In step 426, reference numeral t3 denotes a preset third time at which the compressor 111 is driven at the second preset frequency, and n3 denotes an elapsed time. Here, the second set frequency is preferably about the intermediate value between the calculated reference operating frequency and the first set frequency for smooth operation control of the compressor 111.

Next, when it is determined in step 426 that the preset third time t3 has elapsed, the control block 308 sets the operating frequency of the compressor 111 to the third set frequency m3 kHz. For example, the compressor 111 is driven using the third set frequency existing between the calculated reference operating frequency and the second set frequency m2 kHz. The driving of the compressor by the third set frequency is performed by the preset fourth frequency. It proceeds for a time (eg, 1 minute, etc.) (steps 428, 430). In step 430, reference numeral t4 denotes a preset fourth time at which the compressor 111 is driven at the third preset frequency, and n4 denotes an elapsed time. Here, the third set frequency, preferably for the intermediate value between the calculated reference operating frequency and the second set frequency, for smooth operation control for the compressor 111.

Finally, when it is determined in the step 430 that the preset fourth time t4 has elapsed, the control block 308 sets the operating frequency of the compressor 111 as the calculated reference operating frequency. By driving the compressor 111, the start operation of the compressor 111 is terminated (step 432).

Therefore, according to the air conditioner operation control method of the present invention, the optimum compressor by performing the start-up control of the compressor in a manner of gradually increasing the compressor operation frequency at regular time intervals to reach the Mokpo operation frequency (reference operation frequency) The driving conditions can be realized, and thus, the discharge pressure rise rate of the compressor can be slowed, thereby effectively preventing problems such as compressor oil carbonization due to the rise of the discharge temperature due to the high pressure rise.

In addition, the present invention by gradually increasing the compressor operating frequency at regular intervals to perform the start-up control of the compressor in a manner to reach the Mokpo operating frequency, it is possible to suppress the rise of the operating current to more precisely control the rotation speed of the compressor motor Therefore, it is possible to realize optimum control in a high efficiency air-conditioning system whose main purpose is to use a rotation speed controlled compressor.

Meanwhile, in a preferred embodiment of the present invention, the operating frequency of the compressor is divided into four stages (0 Hz, the first set frequency, the second set frequency, and the third set frequency) so as to gradually increase and reach the reference operating frequency. Although described as controlling the start-up operation of the compressor, this is merely presented as an example, the present invention is not necessarily limited to this, the operation frequency of the compressor according to the need or use of four or more stages (for example, five stages) , 6 stages, 7 stages, 8 stages, etc.), and of course, it is possible to realize a smoother compressor start-up operation.

In addition, in the preferred embodiment of the present invention, the operation frequency of the compressor is divided into four stages, and described as driving one minute at each stage, but this is merely illustrative and the present invention is not necessarily limited thereto. In addition, the time can be increased or decreased in consideration of various factors such as the surrounding environment of the compressor, and the driving time of each step can be set differently according to need or use.

Furthermore, in the preferred embodiment of the present invention, the correction coefficient values for the indoor temperature, the outdoor temperature, and the temperature difference value (that is, the temperature difference value between the room temperature and the set temperature) are extracted from the table stored in advance, and thus the present invention has been described. However, the present invention is provided by way of example only, and the present invention is not necessarily limited thereto. Of course, the present invention may be directly calculated and used in real time without being stored as table information.

In the foregoing description, the present invention has been described with reference to preferred embodiments, but the present invention is not necessarily limited thereto. Those skilled in the art will appreciate that the present invention may be modified without departing from the spirit of the present invention. It will be readily appreciated that branch substitutions, modifications and variations are possible.

As described above, according to the present invention, unlike the aforementioned conventional method in which the operation frequency of the compressor and the opening degree of the electromagnetic expansion valve are divided into two stages, the indoor and outdoor temperatures, the room temperature and the set temperature when the power is applied. The reference operating frequency is calculated using the difference value and the respective correction coefficient values, and when the operation start signal is applied, the indoor and outdoor fans are driven to first adjust the indoor and outdoor pressure balance, and then the compressor operating frequency is gradually increased. By controlling the compressor start operation by raising the reference operating frequency, an optimum compressor driving condition can be realized, which slows down the discharge pressure of the compressor, thereby increasing the compressor discharge temperature and increasing the pressure. Damage or cracks in the piping It is possible to prevent the problem effectively.

Claims (8)

As a method of controlling the starting operation of an air conditioner using a compressor, A first step of calculating an indoor air conditioning load based on a temperature measured indoors and outdoors of the air conditioner and a temperature difference value between a room temperature and a set temperature; A second process of calculating a reference operating frequency of the compressor based on the calculated heating and cooling loads; A third process of adjusting the pressure balance by driving the indoor / outdoor fan for a first predetermined time by setting the operating frequency of the compressor to 0 kHz when the operation start signal of the air conditioner is provided; A fourth step of driving the compressor for a preset second time using an operating frequency of the compressor as a first set frequency; A fifth process of driving the compressor for a preset third time by setting the operating frequency of the compressor to a second set frequency smaller than the calculated reference operating frequency and greater than the first set frequency; A sixth process of driving the compressor for a preset fourth time using an operating frequency of the compressor as a third set frequency smaller than the calculated reference operating frequency and greater than the second set frequency; A seventh process of driving the compressor at the calculated reference operating frequency Operation control method of the air conditioner comprising a. The method of claim 1, The first process, An eleventh process of measuring the indoor and outdoor temperatures and calculating a temperature difference value between the measured indoor and set temperatures; A twelfth process of determining a correction coefficient value of the indoor temperature, a correction coefficient value of the outdoor temperature, and a correction coefficient value of the temperature difference value by using a preset table value; A thirteenth step of calculating the indoor cooling and heating load by using a preset cooling calorie, a preset heating calorie, and the respective correction factor values. Operation control method of the air conditioner comprising a. The method according to claim 1 or 2, And the second set frequency is an intermediate value between the calculated reference driving frequency and the first set frequency. The method according to claim 1 or 2, And the third set frequency is an intermediate value between the calculated reference driving frequency and the second set frequency. The method according to claim 1 or 2, And the first time, the second time, the third time and the fourth time each have the same time range. As a method of controlling the starting operation of an air conditioner using a compressor, A first step of calculating an indoor air conditioning load based on a temperature measured indoors and outdoors of the air conditioner and a temperature difference value between a room temperature and a set temperature; A second process of calculating a reference operating frequency of the compressor based on the calculated heating and cooling loads; A third process of adjusting the pressure balance by driving the indoor / outdoor fan for a first predetermined time by setting the operating frequency of the compressor to 0 kHz when the operation start signal of the air conditioner is provided; A fourth process of driving the compressor for a preset second time at a predetermined operating frequency that is at least smaller than the calculated reference operating frequency; A fifth process of driving the compressor for a preset third time using an operating frequency of the compressor as an intermediate value between the calculated reference operating frequency and the immediately preceding operating frequency; A sixth process of repeating the fifth process by a preset N-th order (N is an integer greater than 1); A seventh process of driving the compressor to the calculated reference driving frequency when the preset N-th iteration ends; Operation control method of the air conditioner comprising a. The method of claim 6, The first process, An eleventh process of measuring the indoor and outdoor temperatures and calculating a temperature difference value between the measured indoor and set temperatures; A twelfth process of determining a correction coefficient value of the indoor temperature, a correction coefficient value of the outdoor temperature, and a correction coefficient value of the temperature difference value by using a preset table value; A thirteenth step of calculating the indoor cooling and heating load by using a preset cooling calorie, a preset heating calorie, and the respective correction factor values. Operation control method of the air conditioner comprising a. The method according to claim 6 or 7, And the first time, the second time, and the third time each have the same time range.

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