KR20010037393A - Inverter air conditioner control method - Google Patents

Abstract

PURPOSE: A method is provided to obtain a comfort environment by controlling the indoor fan and the outdoor fan in accordance with the pipe temperature and outdoor temperature. CONSTITUTION: A method comprises a step(200) of setting the heating operation temperature to an operation temperature for compressor and the compressor off temperature to the temperature which is z deg.C higher than the preset temperature; a step(203) of judging whether the indoor temperature is lower than the compressor on temperature; a step(206) of judging whether the indoor temperature is lower than the compressor off temperature if not; a step(212) of judging whether the compressor is operated at a frequency higher than that of the normal operation; a step(215) of judging whether 10 minutes have lapsed since operation of the compressor, if yes; a step(218) of initializing compressor operation flag and ending the operation if 10 minutes have lapsed; a step(221) of judging whether the value obtained by subtracting the indoor temperature from the compressor off temperature is higher than z deg.C; a step(236) of judging whether the compressor is operated at a frequency higher than that of the normal operation, if the value is higher than z deg.C; a step(242,239) of setting the target operation step of the compressor, if the compressor is not operated at a frequency higher than that of the normal operation; a step(224) of judging whether the value obtained by subtracting the indoor temperature from the compressor off temperature is higher than x deg.C, if it is judged in the step(221) that the value is lower than z deg.C; a step(227) of judging whether the compressor is operated at a frequency higher than that of the normal operation, if it is judged in the step(224) that the value is higher than x deg.C; and a step(233,230) of setting the target operation step of the compressor in accordance with the determination result of the step(227).

Description

Inverter air conditioner control method

The present invention relates to a heating operation control method of an inverter air conditioner, and more particularly, to a heating operation control method of an inverter air conditioner capable of efficiently controlling the operating frequency of a compressor based on an indoor temperature and an outdoor temperature. will be.

An air conditioner is a device for maintaining indoor air in a state most suitable for use and purpose. For example, in summer, the room is adjusted to cool air condition, and in winter, the room is controlled to warm heating condition. In addition, the air conditioner controls the humidity in the room, and controls the air in the room to a comfortable clean state. As life convenience products such as air conditioners are gradually expanded and used, consumers are demanding high energy use efficiency, performance improvement, and convenience products.

In addition, the increasing use of home appliances and electronic devices in homes, businesses, and factories has led many countries and organizations to regulate the use of their products in various ways. An example is international harmonic regulation, which limits the effect of harmonics on peripherals when the product is used.

The inverter air conditioner was developed to meet these requirements. The inverter air conditioner controls the compressor by frequency and satisfies international harmonic regulation standards due to high power factor improvement, while reducing manufacturing costs and providing higher performance.

The inverter air conditioner of the above description will be briefly described with reference to FIG.

As shown in FIG. 1, an inverter air conditioner is generally divided into an indoor unit 20 composed of a heat exchanger 10, and an outdoor unit 30 composed of a compressor 5, a heat exchanger 15, and the like. . The indoor unit 20 and the outdoor unit 30 have microcomputers 13 and 17 for controlling respective components, and the microcomputer 13 and the microcomputer embedded in the outdoor unit 30 are embedded in the indoor unit 20. 17 transmits and receives data when necessary for mutual control.

The inverter air conditioner of the above configuration is controlled in the following manner. In the following description, a process by the heating operation of the inverter air conditioner will be described.

First, when a user sets a desired heating temperature using key input means (not shown) provided in the indoor unit 20, the set temperature is recognized by the microcomputer 13 inside the indoor unit 20. The microcomputer 13 of the indoor unit 20 transmits the set temperature to the outdoor unit 30 through communication means (not shown), and the microcomputer 17 of the outdoor unit 30 inputs the set temperature, thereby Control the heating operation accordingly.

That is, the microcomputer 17 of the outdoor unit 30 performs control to drive the compressor 5 until the indoor temperature reaches the set temperature. Then, when the indoor unit 20 receives a signal that the indoor temperature has reached the set temperature, the microcomputer 17 of the outdoor unit 30 stops the operation of the compressor 5, and again from the indoor unit 20 side It is in a standby state preparing to drive the compressor 5 until a signal is required to drive.

That is, the control method of the conventional inverter air conditioner used the method of driving a compressor until the indoor temperature reaches the setting temperature based on the heating temperature or cooling temperature set by the user.

Therefore, the control method of the conventional inverter air conditioner is to operate the compressor when the indoor temperature is lower than the set temperature regardless of the high, low or outdoor temperature of the indoor temperature, the compressor when the indoor temperature is higher than the set temperature Since the method of controlling the drive of the compressor irrespective of the indoor temperature and the outdoor temperature is used, such as driving the engine, there is a problem that the operating efficiency of the compressor is lowered.

In addition, the conventional control method of the inverter air conditioner has a problem in that the operating efficiency of the compressor is lowered because the driving force of the compressor is constantly controlled regardless of the indoor temperature and the outdoor temperature. Therefore, the driving efficiency of the compressor is lowered because the driving force of the compressor is constantly controlled regardless of whether it is sufficient even if the compressor is weakly driven or when the compressor is strongly driven.

Accordingly, an object of the present invention is to provide a heating operation control method of an inverter air conditioner that can efficiently perform heating operation of a compressor by frequency control based on an indoor temperature and an outdoor temperature.

1 is a configuration diagram of a typical inverter air conditioner,

2 to 6 is an operation flowchart for the heating operation control of the inverter air conditioner according to the present invention,

7 is a relationship diagram between a compressor operation frequency and a compressor operation target step;

8 is a compressor operation target frequency table according to the room temperature;

9 is a compressor operation target step control diagram according to the outdoor temperature,

10 is a fan control diagram during heating operation according to the present invention.

Explanation of symbols on the main parts of the drawings

5: compressor 10,15: heat exchanger

13,17: microcomputer 20: indoor unit

30: outdoor unit

The heating operation control method of the inverter air conditioner according to the present invention for achieving the above object comprises: a first step of dividing the room temperature into a predetermined range, and setting the operating frequency of the compressor corresponding to each range; Dividing the outdoor temperature into a predetermined range and setting an operating frequency of a compressor corresponding to each range; Detecting a room temperature and selecting an operating frequency of a compressor preset in the first step based on the detected room temperature; And a fourth step of detecting the outdoor temperature and correcting the operating frequency of the compressor selected in the third step to the operating frequency of the compressor preset in the second step according to the detected outdoor temperature.

The heating operation control method of the inverter air conditioner of the present invention is characterized by subdividing the indoor temperature, setting the operating frequency of the compressor according to the same, and controlling the heating operation according to the change of the indoor temperature.

In the heating operation control method of the inverter air conditioner of the present invention, the operation frequency of the compressor is set according to the outdoor temperature, and the heating operation is controlled according to the change of the outdoor temperature to minimize waste of power consumption due to excessive operation. It features.

In addition, the heating operation control method of the inverter air conditioner of the present invention is characterized by controlling the operation of the indoor fan and the outdoor fan according to the piping temperature and the outdoor temperature.

Hereinafter, a heating operation control method of an inverter air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

First, before describing the heating operation operation process of the inverter air conditioner of the present invention, the relationship between the operation frequency of the compressor and the operation target step of the compressor will be described.

7 shows the relationship between a compressor operation frequency and a compressor operation target step in a table.

That is, in the present invention, after dividing from one step (# 1) to 22 steps (# 22), the operating frequency of the compressor corresponding to each step is set. For example, 1 step (# 1) is AHz, 2 step (# 2) is BHz, 3 step (# 3) is CHz, ........, 21 step (# 21) is UHz, 22 step (# 22) is set to VHz. Of course, what is set here is described by way of example, and the target step of the compressor can be set more as needed, and the operating frequency of the compressor can be further subdivided accordingly. At this time, the larger the target step value, the larger the operating frequency is set. That is, the larger the operation target step of the compressor, the larger the operating frequency of the compressor. In addition, the operation frequency of the riser operation is higher than that of the compressor.

8 shows an operating frequency table of the compressor according to the room temperature.

As shown in FIG. 8, the compressor sets the stop temperature (COMP OFF temperature) to the set temperature + z ° C, and sets the compressor operating temperature (COPM ON temperature) to the user's set temperature. The operating frequency of the compressor is selected according to the difference. For example, if the difference between the compressor stop temperature and the room temperature is equal to or less than p ° C., the operation target step of the compressor is set to # 1, and if it is equal to or less than r ° C., # 3 is selected. That is, the larger the difference between the off temperature and the room temperature of the compressor is, the higher the target operation step is, thereby increasing the operating frequency of the compressor.

Next, FIG. 9 shows that the operation target step of the compressor is corrected according to the outdoor temperature.

First, when the heating operation is performed at the outdoor temperature of more than d ℃, it is possible to obtain a sufficient heating capacity even if the compressor is controlled at a low frequency because the outdoor temperature is high. Therefore, in order to prevent an increase in power consumption of the compressor due to excessive operation, the operation target step of the compressor is set to # 5 at the maximum when the outdoor temperature is d ° C or higher. When the outdoor temperature is between c and d, the operation target step of the compressor is set to # 9 at maximum. When the outdoor temperature is between b ° C and c ° C, the compressor is operated for 30 minutes at a step higher than the rated frequency (Fh: # 13) of the compressor and then set to # 13 to control the operation of the compressor. In addition, when the outdoor temperature is between a ℃ and b ℃ operating for 30 minutes at a step above the rated frequency (Fh: # 13) of the compressor, it is set to the maximum # 19 to control the operation of the compressor. If the outdoor temperature is lower than a ℃ and the compressor is suddenly driven at a large frequency while the outdoor temperature is too low, the compressor may be overloaded and unstable driving may occur. After 3 minutes, the operation of the compressor is controlled.

Next, Figure 10 is a control diagram for controlling the operation of the indoor fan during the heating operation.

In the operating state of the compressor, when the piping temperature is below e ℃, the indoor fan is stopped to prevent cold wind from circulating. When the piping temperature is below f ℃, the indoor fan is operated with weak wind. Control the operation of the indoor fan by the air volume.

In the stationary state of the compressor, the indoor fan is stopped when the piping temperature is less than or equal to g ° C., and the indoor fan is operated in a mild wind when the piping temperature is greater than or equal to g ° C.

If the outdoor temperature is below h ℃, the indoor fan is controlled by one step lower than the target step set for the indoor fan operation. If the temperature is higher than i ℃, the indoor fan is controlled by the set air volume. The temperature is controlled by one step higher than the target step set for the operation of the indoor fan.

2 to 6 are flowcharts illustrating a heating operation control method of the inverter air conditioner according to the present invention. The necessary hardware configuration will be described with reference to FIG. 1.

2 is an operation flowchart for determining the operation state of the current air conditioner before the inverter air conditioner of the present invention starts the heating operation control.

First, the microcomputer 10 of the indoor unit 20 determines whether the air conditioner is a model for cooling (step 100). In step 100, when the air conditioner is a model for exclusive use of cooling, the heating operation control operation according to the configuration of the present invention is unnecessary, and therefore, the determination accordingly is made first.

When it is not the air-conditioning-only model in step 100, it is determined in step 103 whether the operation is off. Step 103 is a step of checking whether a user's command for driving is input.

Next, in step 103, if it is determined that the user turns on the driving, it is determined whether the driving is a current trial driving step (step 106). Step 106 is a step of determining whether the test operation step by the test.

Next, before entering the heating operation in step 109, a reconfirmation operation according to whether the user requests the heating operation is performed.

In operation 103, 106 and 109, the microcomputer 10 proceeds to operation 133 when the operation is off, the commissioning operation, or the heating operation is not performed. In step 133, the standing timer for counting the operation time is turned off during the standing operation, and the timer for counting the time until reaching the set temperature is turned off. In step 133, the timer counting off the time at which the outdoor temperature is operated at a ° C is turned off, and at the same time, when the outdoor temperature reaches a ° C, the a ° monitoring flag set is cleared.

After the step 133 is performed, the microcomputer 13 exits the operation program for controlling the heating operation and performs the next operation.

However, when it is determined in step 109 that the heating operation command is input, the microcomputer 13 of the indoor unit 20 transmits a signal for the heating flag set to the outdoor unit 30 through communication means (not shown). (Step 112). The microcomputer 17 of the outdoor unit 30 having received the heating flag set signal of step 112 sets the heating flag.

Next, the microcomputer 13 of the indoor unit 20 determines whether it is currently in the defrost operation to melt the frost (step 115). When the defrosting operation is not performed in step 115, it is determined whether the defrosting release flag is initialized (step 118). When the defrosting release flag is initialized, the heating operation control according to FIG. 3 is started.

However, when the defrost release flag is not initialized in step 118, after the hot start operation of circulating warm wind is completed, it is determined whether a predetermined time (about 1 minute) has elapsed (step 127). The heating operation control according to FIG. 3 is started while initializing the defrost release flag (step 130).

That is, in all the steps up to the above, the user judges whether a key for heating operation is input, checks whether the command designated by the user is heating operation, and also checks whether the air conditioner can perform the heating operation. It is a process of judgment. When the heating operation is ready, the process proceeds to A of FIG. 3 while setting the defrost release flag in step 130 to start a full heating operation.

Next, FIG. 3 is a connection start from A of FIG. 2, and is an operation flowchart for full-scale heating operation.

The microcomputer 13 recognizes the user or the preset heating operation temperature as the set temperature, and then sets the set temperature to the operating temperature (COMP ON temperature) of the compressor. Then, the temperature higher than the set temperature is set to a stop temperature (COMP OFF temperature) of the compressor (step 200).

Thereafter, the microcomputer 13 detects the indoor temperature from an indoor temperature sensor (not shown) mounted on the indoor unit side, and determines whether the indoor temperature is lower than the compressor operating temperature (COMP ON temperature) (203). step).

When the room temperature is not lower than the operation temperature of the compressor in step 203, the microcomputer 13 determines whether the room temperature is lower than the stop temperature (COMP OFF temperature) of the compressor (step 206).

By the determination of the step 203 and the step 206, when the detected room temperature is not lower than the operating temperature of the compressor and not lower than the stop temperature of the compressor, the microcomputer 13 determines that the operation of the compressor is unnecessary. . Accordingly, the flow proceeds to step 209 to initialize the compressor on flag and the winning run flag.

However, when the indoor temperature is lower than the operating temperature of the compressor in step 203 or when the indoor temperature is lower than the stop temperature of the compressor in step 206, the microcomputer 13 determines whether the current operating state is a granular operation ( Step 212).

The rising operation means controlling the operation of the compressor at a higher frequency than the normal operation of the compressor in order to generate high power in the initial operation of the compressor.

If it is determined in operation 212 that the current operation state of the compressor is the winning operation state, the winning operation time is read from the winning timer, and it is determined whether the winning operation time has reached 10 minutes (step 215). When the winning run time reaches 10 minutes in step 215, the microcomputer terminates the winning run while initializing the winning run flag (step 218).

When it is determined in the step 212 that it is not the run-up operation and it has not reached 10 minutes since the start of the start-up operation in step 215, the microcomputer 13 subtracts the room temperature from the stop temperature of the compressor to z ° C. Compare greater than (step 221).

When the condition of the step 221 is satisfied, the microcomputer 13 determines whether the standing operation is in progress according to whether the winning operation flag is set (step 236). In the step 236, when the operation is a stand-up operation, the operation target stem of the compressor is set to # 22 (step 242), and when the step is not in the step-up operation in the step 236, the operation target step of the compressor is set to # 19 (step 239). step). The process continues to step 412.

That is, in steps 221, 236, 239, and 242, the operation frequency of the compressor is set when the difference between the room temperature and the off temperature of the compressor is z ° C. or higher.

Next, when the condition of step 221 is not satisfied, the microcomputer 13 compares whether the value obtained by subtracting the room temperature from the stop temperature of the compressor is greater than x ° C. (step 224).

When the condition of the step 224 is satisfied, the microcomputer 13 determines whether the winning operation is in progress according to whether the winning operation flag is set (step 227). In step 227, the operation target stem of the compressor is set to # 18 (step 233), and in step 227, the operation target step of the compressor is set to # 15 (step 230). step). The flow proceeds to step 412.

That is, in steps 224, 227, 230, and 233, the operation frequency of the compressor is set when the difference between the room temperature and the off temperature of the compressor is between x ° C. and y ° C.

In addition, a process of continuously comparing the difference between the current room temperature and the stop temperature of the compressor is performed in FIG. 4.

4 starts connection from B of FIG. 3, and performs a third comparison step 300 to set an operation target step of the compressor according to the room temperature. In step 300, the value obtained by subtracting the room temperature from the stop temperature of the compressor is compared with the value greater than v ° C. When the condition of step 300 is satisfied, the operation target step of the compressor is set to # 15 or # 13 according to whether the winning operation flag is set (steps 306, 309 and 312). The process continues to step 412.

That is, in steps 300, 306, 309, and 312, the operation frequency of the compressor is set when the difference between the room temperature and the off temperature of the compressor is between v ° C and w ° C.

In step 303, the operation temperature of the compressor is subtracted from the stop temperature of the compressor is greater than t ° C, and the operation target step of the compressor is set to # 9 or # 12 according to the setting of the granular operation flag. Step 315, step 318, and step 321). The process continues to step 412.

That is, in steps 303, 315, 318, and 321, the operating frequency of the compressor is set when the difference between the room temperature and the off temperature of the compressor is between t ° C and u ° C.

Next, step 324 compares whether the difference between the stop temperature of the compressor and the room temperature is greater than r ° C, and sets the operation target steps of the compressor to # 5 and # 9 according to whether the granular operation flag is set (step 345, Step 348, step 351). The process continues to step 412.

That is, in steps 324, 345, 348, and 351, the operation frequency of the compressor is set when the difference between the room temperature and the off temperature of the compressor is between r ° C. and s ° C.

In operation 327, the difference between the stop temperature of the compressor and the room temperature is greater than p ° C. Then, the operation target steps of the compressor are set to # 3 and # 6 according to whether the winning operation flag is set (steps 333, 336, and 339). Subsequently, step 412 is performed.

That is, in steps 327, 333, 336, and 339, the operation frequency of the compressor is set when the difference between the room temperature and the off temperature of the compressor is between p ° C and q ° C.

Next, step 400 is a final comparison step for determining the operation target step of the compressor according to the room temperature. It sets to # 1, # 3 (step 403, step 406, step 409).

That is, in steps 400, 403, 406, and 409, the operation frequency of the compressor is set when the difference between the room temperature and the off temperature of the compressor is between n ° C and o ° C.

That is, steps 221, 224, 300, 300, 303, 324, 327, and 400 are comparison steps for determining an operation target step of the compressor based on room temperature. Accordingly, if the condition of step 221 is not satisfied, step 224 is performed, and if step 224 is also not satisfied, the comparison step is sequentially performed in such a manner as to proceed to step 300 so that the operation target of the compressor according to the room temperature is performed. Determine the step.

When the operation target step of the compressor by the indoor temperature is determined by the above process, the process of correcting the operation target step of the compressor by the outdoor temperature is performed.

Next, a process of correcting the operation target step of the compressor by the outdoor temperature will be described with reference to FIGS. 5 and 6.

The microcomputer 13 of the indoor unit 20 sends a signal to the microcomputer 17 of the outdoor unit 30 to detect the current outdoor temperature, and receives the detected outdoor temperature. When the detected outdoor temperature is higher than a ° C. (step 412), the outdoor timer (a ° C.) monitoring timer is turned off, and the outdoor temperature (a ° C.) flag exceeding 3 minutes is initialized (step 418).

However, when the outdoor temperature detected in step 412 is lower than a ° C., it is determined whether the outdoor temperature has been maintained for at least 3 minutes in a state below a ° C. (step 415).

Next, when it is determined in step 412 that the outdoor temperature is higher than a ° C. or in step 415, when the outdoor temperature is not maintained for less than 3 minutes, the operating conditions of the compressor according to the outdoor temperature of the microcomputer 13 are determined. To judge.

First, as an operation condition determining step of the compressor according to the outdoor temperature, it is determined whether the outdoor temperature is higher than d ° C (step 421). When the condition of the step 421 is satisfied, the microcomputer 13 again determines whether the operation target step of the compressor determined by the room temperature is equal to or less than # 5 (step 436).

If the condition of step 436 is satisfied, the operation target step of the compressor determined by the indoor temperature is equal to or less than # 5, and the outdoor temperature satisfies d ° C or higher. The Fh abnormality monitoring timer for counting the time to be turned off is turned off, and the operating frequency of the compressor is set to the operation target stage of the compressor determined by the room temperature. In operation 527, the compressor starts to operate according to the determined operation target step while setting the operation flag of the compressor.

In addition, although the outdoor temperature satisfies d ° C or higher in step 421, when the operation target step of the compressor by the preset indoor temperature in the processes of FIGS. 3 and 4 is greater than # 5 (step 436), the detected outdoor temperature is detected. Since the temperature is high, the operation target stage of the compressor is adjusted to # 5 (step 439). Then, the operation of the compressor is performed by the adjusted step.

Next, when the condition of step 421 is not satisfied, the microcomputer 13 determines whether the outdoor temperature is higher than c ° as the step of adjusting the operating frequency of the compressor by the second outdoor temperature (step 424). When the outdoor temperature according to the step 424 is higher than c ° C, it is connected to the beginning D shown in FIG. 6 and continues. This process will be described after explaining all the steps of FIG.

On the other hand, when the condition for determining whether the outdoor temperature is higher than c ℃ in step 424 is not satisfied, the microcomputer adjusts the operating frequency of the compressor by the third outdoor temperature, and whether the outdoor temperature is higher than a ℃. (Step 427).

If the condition of step 427 is satisfied, control is performed from the beginning of FIG. 6, and if the condition of step 427 is not satisfied, it is checked whether the operation time of the outdoor temperature a ℃ monitoring timer exceeds 3 minutes ( Step 430).

In operation 430, when the operation time of the outdoor temperature a ℃ monitoring timer does not reach 3 minutes, the operation proceeds to operation 436 to determine whether the operation target stage of the preset compressor is equal to or less than # 5. When the operation target stage of the preset compressor is less than # 5, the operation of the compressor is controlled by maintaining the predetermined stage as it is while turning off the Fh or more monitoring timer that counts the time when the compressor operates at the rated frequency or more (step 529). (Step 527).

However, when the operation time of the outdoor temperature a ℃ monitoring timer does not reach 3 minutes in step 430, but when the operation target stage of the compressor preset in step 436 is # 5 or more, the operation target stage of the compressor is adjusted to # 5. (Step 439).

That is, when the operation time of the outdoor temperature a ℃ monitoring timer does not reach 3 minutes in step 430, the operation target step of the compressor is adjusted to # 5 or less by steps 436, 439, and 527. This is because unstable conditions occur when the compressor is controlled at high frequencies when the outdoor temperature is below a ° C. Therefore, in order to prevent the unstable state of the compressor, while operating the compressor in a low frequency band for 3 minutes while the outdoor temperature a ℃ monitoring timer monitors whether or not to reach 3 minutes.

Then, when the operation time of the outdoor temperature a ℃ monitoring timer reaches 3 minutes, the microcomputer 13 sets the flag of more than 3 minutes outside temperature a ℃ (step 433). And it returns to the initial stage for the heating operation control according to the present invention and repeats the above operation.

In the process of repeatedly performing the heating operation control according to the present invention, the currently detected outdoor temperature is determined to be equal to or less than a ° C. (step 412), and the flag of exceeding the outdoor temperature a ° C. set in step 433 is continuously set. , The condition of step 415 is satisfied. At this time, the microcomputer 13 proceeds to step 527 to control the operation of the compressor while maintaining the preset operation target stage of the compressor as the adjusted operation target stage of the compressor.

Next, when step 424 of determining whether the outdoor temperature is greater than or equal to c ° C. or step 427 to determine whether the outdoor temperature is greater than or equal to a ° C. is satisfied, the microcomputer 13 may operate the compressor according to the outdoor temperature of FIG. 6. Perform step adjustment.

First, in operation 500, it is determined whether the user is sleeping. When the sleep operation is performed in step 500, the process proceeds to step 436 to determine whether the operation target step of the compressor determined by the room temperature is equal to or less than # 5. If the step 436 is satisfied, the sleep operation is canceled while maintaining the currently set driving target step (steps 529 and 527). However, when step 436 is not satisfied, the operation target step of the compressor is adjusted to # 5 at maximum, and the sleep operation is performed (step 439).

That is, even when the outdoor temperature is above c ° or the outdoor temperature is above a ° C., when it is determined that the user is going to sleep, the operation target step of the compressor is controlled to be performed at the maximum # 5.

However, after the condition of step 424 or step 427 is satisfied, when it is determined that the sleep operation is not performed in step 500, it is determined whether the operation target step of the compressor determined by the room temperature is equal to or less than # 9 (step 503). If the condition of step 503 is satisfied, the microcomputer adjusts the operation target step of the compressor to the maximum # 9 (step 506).

That is, when the outdoor temperature is at least c ° C in step 424 or the outdoor temperature is a ° C or more in step 427, if the operation target step of the compressor determined by the indoor temperature is less than # 9 (step 503), the microcomputer After adjusting the operation target stage of the compressor to the maximum # 9, the compressor is operated at the adjusted operating frequency while turning off the Fh or more monitoring timer that counts the time that the compressor operates at the rated frequency or more (step 529). (Step 527).

However, if the outdoor temperature in step 424 is greater than or equal to c ° C or the outdoor temperature is greater than or equal to a ° C in step 427, and the operation target stage of the compressor determined by the room temperature in step 503 is greater than # 9, Comparing whether the operation target stage of the compressor determined by the smaller than # 12 (step 512). When the condition of step 512 is satisfied, the compressor is operated at a preset operating frequency while turning off the Fh or more monitoring timer that counts the time when the compressor operates at the rated frequency or more (steps 529 and 527).

On the other hand, if the outdoor temperature in step 424 is above c ° or the outdoor temperature in step 427 is above a ° C., even if the condition of step 512 is not satisfied, the microcomputer operates at the target stage of the compressor determined by the room temperature. Determines that # 12 or more.

Therefore, the microcomputer 13 determines whether the time of operation at the rated frequency of the compressor has reached 30 minutes (step 515), and continues to operate the currently preset compressor until the condition of the step 515 is satisfied. As a step, operation of the compressor is controlled (step 527).

Thereafter, when the condition of step 515 is satisfied, the outdoor temperature is detected again when the 30-minute operation ends. Then, it is determined whether the outdoor temperature is higher than b ° C (step 518). When the outdoor temperature is higher than 4 ° C, the operation target step of the compressor is adjusted to # 13 (step 524), and the outdoor temperature is higher than b ° C. When it is low, the operation target of the compressor is adjusted to the maximum # 19 to control the operation of the compressor (steps 521 and 527).

As described above, in the heating operation control method of the inverter air conditioner according to the present invention, first, the operating frequency of the compressor is set by the indoor temperature, and then, secondly, the operating frequency of the compressor preset by the outdoor temperature is controlled. Doing. Therefore, the heating operation control method of the present invention allows the heating operation to be performed in accordance with the change in the indoor temperature, and also sets the compressor operation frequency according to the outdoor temperature to suppress the power consumption due to excessive operation, and cycle balance in low temperature conditions. By adjusting the pressure, more efficient control of the compressor is achieved.

In addition, the heating operation control method according to the present invention, there is an advantage that can create a more comfortable environment by adjusting the indoor fan and the outdoor fan according to the piping temperature and the outdoor temperature.

Claims (7)

A first step of dividing the room temperature into a predetermined range and setting an operating frequency of a compressor corresponding to each range; Dividing the outdoor temperature into a predetermined range and setting an operating frequency of a compressor corresponding to each range; Detecting a room temperature and selecting an operating frequency of a compressor preset in the first step based on the detected room temperature; A fourth step of detecting an outdoor temperature and correcting an operating frequency of the compressor selected in the third step to an operating frequency of the compressor preset in the second step according to the detected outdoor temperature. Operation control method. The method of claim 1 wherein: A sixth step of setting an operating temperature of the compressor to a user set temperature and setting a stop temperature of the compressor to a temperature obtained by adding a predetermined value to the user set temperature; And a seventh step of controlling the heating operation at the operation frequency of the compressor set in the fourth step within the compressor operating temperature and the stop temperature range set in the sixth step. The method of claim 2 wherein: The operation frequency setting of the compressor according to the indoor temperature of the first step is divided on the basis of the difference between the stop temperature and the room temperature of the compressor, heating operation control method of the inverter air conditioner. The method of claim 2 wherein: An eighth step of determining an operating state of the compressor; A ninth step of detecting a pipe temperature; And a tenth step of controlling the air volume of the indoor fan according to the operation state and the piping temperature of the compressor. The method of claim 2 wherein: The heating operation control method of the inverter air conditioner further comprises the step of controlling the operation of the indoor fan according to the outdoor temperature. The method according to any one of claims 2 to 5, And operating the compressor at a low frequency for a predetermined time when the detected outdoor temperature may cause freezing of the compressor. The method of claim 6, Determining whether or not going to bed, The heating operation control method of the inverter air conditioner characterized in that when the sleep operation is performed, the operation of the compressor at a low frequency.