KR100484930B1 - Control method of air-conditioner - Google Patents

Abstract

The present invention relates to a control method of an air conditioner capable of achieving an optimal temperature balance of room temperature, the setting step of performing operation setting according to a user's input, calculating a temperature non-uniformity index according to the detected room temperature Comprising an operation step of operating the air conditioner by comparing the set temperature according to the operation setting input by the controller, by controlling the speed and the wind direction of the fan in accordance with the temperature nonuniformity of the air conditioning space to perform the concentrated air conditioning and dispersion air conditioning, It is possible to provide a comfortable indoor environment by improving the temperature uniformity of the, and to improve the temperature uniformity within a short time has the effect of saving energy.

Description

Control method of air conditioner

The present invention relates to an air conditioner, and more particularly, to a control method of an air conditioner capable of effective power saving operation.

In general, an air conditioner uses an endothermic action and an exothermic action formed by vaporization or liquefaction of a refrigerant circulating in a refrigeration cycle in which a compressor, a condenser, a refrigerant expansion valve, and an evaporator are connected to a refrigerant pipe to form a closed circuit. It is a device for heating.

Such an air conditioner has a compressor and a condenser, an outdoor unit installed outdoors, a refrigerant type expansion valve and an evaporator, and an indoor unit installed separately, and an integrated type in which the above elements are installed in one housing. There is this.

1 is a perspective view for explaining a conventional air conditioner.

Referring to FIG. 1, a conventional air conditioner includes a suction grill 11 for allowing indoor air to flow into a lower portion of a front surface of a main body 10, and a discharge port for discharging cold air into an upper portion of an upper surface of the body 10. The discharge port is provided with a wind direction control vane 12 for adjusting the wind direction. In addition, the front side of the main body is provided with an input unit 13 for inputting an operation command and a display unit 14 for displaying operation information.

As described above, since the conventional air conditioner only performs concentrated air conditioning in one direction, not only the indoor temperature is uneven, but also it takes a long time to reach a uniform state of the indoor temperature, so that the user is unsatisfied and the energy consumption is large. There was this.

The present invention is to solve this problem, it is an object of the present invention to provide a control method of the air conditioner that can achieve the optimum temperature balance of the room temperature.

The control method of the air conditioner according to the present invention for achieving this object, the setting step of performing the operation setting according to the user's input, calculates the temperature non-uniformity index in accordance with the detected indoor temperature and the operation setting input by the user Comprising an operating step of operating the air conditioner by comparing the set temperature according to.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

2 is an exploded perspective view for explaining the configuration of the air conditioner according to the present invention. 3 is a longitudinal sectional view for explaining the configuration of the air conditioner according to the present invention. 4 is a cross-sectional view for explaining the configuration of the air conditioner according to the present invention.

In the air conditioning according to the present invention, the inlet grill 31 to be described later is disposed at an upper portion of the front surface of the cabinet 20 so that the air can be cooled in the cabinet 20 forming the exterior. 21 is formed, and left and right discharge ports 22a and 22b are formed at upper portions of both sides of the cabinet 20 to discharge the cooled air into the indoor space.

In addition, the air conditioner includes a pair of fans 32a and 32b installed adjacent to the left and right discharge ports 22a and 22b formed at both sides of the cabinet 20 in the interior space of the cabinet 20, and the suction grille ( 31 and a heat exchanger 33 provided between the fans 32a and 32b.

The suction grill 31 is disposed to be spaced apart from the opening 21 by a predetermined distance, so that a suction port 31a having a predetermined width is formed between the edge of the suction grill 31 and the opening 21. Indoor air may be sucked through the inlet 31a.

The fans 32a and 32b are formed as cross-flow fans, and are installed to correspond to the vertical lengths of the left and right discharge ports 22a and 22b formed at both sides of the upper part of the cabinet 20, respectively. Left and right vertical wind vanes 34a and 34b are respectively installed in the left and right discharge ports 22a and 22b to adjust the discharge direction of the cold air in the left and right directions.

In addition, left and right horizontal wind vanes are respectively installed inside the left and right discharge ports 22a and 22b to adjust the discharge direction of cold air in the up and down directions.

The heat exchanger 33 is formed by bending the cross section in a “V” shape such that the left and right sides thereof are disposed toward the fans 32a and 32b, thereby increasing the cross-sectional area to increase the heat exchange performance, and at the same time increasing the suction port 31a. The air introduced through is configured to be guided by dividing toward each fan (32a, 32b) without flow resistance.

The front side of the suction grill 31 is provided with an input unit for receiving an operation command from the user and a display unit 50 for displaying operation information of the air conditioner. In addition, the left and right sides of the air conditioner cabinet 20 are provided with a first temperature detection unit 61 and a second temperature detection unit 62 for detecting the indoor temperature of the left and right of the cabinet 20, the upper and lower one side of the cabinet 20. The third temperature detector 63 and the fourth temperature detector 64 for detecting the indoor temperature of the cabinet 20 above and below are provided.

In the air conditioner according to the present invention configured as described above, after the pair of fans 32a and 32b are operated, the indoor air is introduced through the intake port 31a and cooled through the heat exchanger 33, and then the cabinet 20 It is discharged back to the room through the left and right discharge ports 22a and 22b provided at both sides of the) to cool the indoor space.

5 is a block diagram for explaining the configuration of an air conditioner according to the present invention.

Referring to FIG. 5, the air conditioner according to the present invention includes a control unit 80 for controlling the overall operation, the input unit 40 for receiving an operation command from a user, and a display unit 50 indicating an operation state. The temperature detecting means 60 and a storage unit 70 for storing preset operation data and programs and data generated during operation are connected to the control unit 80.

The temperature detecting means 60 detects an indoor temperature on the right side of the air conditioner cabinet 20 and a first temperature detector 61 for detecting an indoor temperature on the left side of the air conditioner cabinet 20 shown in FIG. 2. To detect the room temperature of the second temperature detector 62, the third temperature detector 63 for detecting the indoor temperature of the upper portion of the cabinet 20 of the air conditioner and the cabinet 20 of the air conditioner It includes a fourth temperature detector 64 for.

In addition, the first fan driver 91 driving the left fan 31a and adjusting the speed, and the second fan driver 92 driving the right fan 31b and adjusting the speed are connected to the control unit 150 to control. Receive.

In addition, the first vertical wing drive portion 101 and the right discharge port 22b which are provided at the left discharge port 22a and drive the left vertical wind direction blade 34a for controlling the left and right flow of air generated by the left fan 31a. A second vertical wing drive 102, which is provided at the side and drives the right vertical wind direction blade 34b for controlling the right and left flow of air generated by the right fan 31b, is connected to the controller 80.

In addition, the first horizontal blade driving unit 111 and the right discharge port 22b are provided at the left discharge port 22a to drive the left horizontal wind vane 35a for controlling the up and down flow of air generated by the left fan 31a. The second horizontal wing drive unit 112 is provided to drive the right horizontal wind vane 35b for controlling the vertical flow of air generated by the right fan 31b and is connected to the controller 80.

On the other hand, the interface unit 120 for communication with the outdoor device 130 is connected to the controller 80.

6 is an explanatory diagram for explaining the wind direction control operation of the air conditioner according to the present invention.

The air conditioner according to the present invention detects the temperature of the left, right, up and down through the first to fourth temperature detectors 61 to 64 and calculates the temperature nonuniformity index in each direction accordingly, and calculates the calculated temperature nonuniformity. As shown in FIG. 6, the wind direction and the wind speed can be controlled in the directions of A, B, C, and D according to the index.

Hereinafter will be described in detail for the control method of the air conditioner according to the present invention.

7 is a control flowchart illustrating a control method of an air conditioner according to the present invention.

Referring to FIG. 7, the user inputs a driving command through the input unit 40 (S10). The controller 80 determines whether automatic operation is performed based on the contents input through the input unit 40 (S20). If it is determined in step S20 that the operation is not automatic operation, the controller 80 sets the general operation according to the contents input by the user through the input unit 40 (S21). At this time, the controller 80 sets the set temperature, the wind speed, and the wind direction according to the content input by the user through the input unit 40. Then, the control unit 80 performs the normal operation according to the set contents (S22).

After the normal operation is performed in step S22, the controller 80 determines whether a predetermined time has elapsed (S23). If it is determined in step S23 that the predetermined time has not elapsed, the controller 80 continues the normal operation of step S22. However, if it is determined in step S23 that the predetermined time has elapsed, the controller 80 sets the driving mode to the first driving mode (S40).

If it is determined that the automatic operation according to the content input through the input unit 40 in the step (S20), the control unit 80 displays the automatic operation content according to the preset data according to the set temperature input by the user through the input unit 40 Set (S30). The controller 80 sets the driving mode to the first driving mode (S40).

After the operation mode is set in step S40, the controller 80 determines whether it is the first driving mode (S50). If it is determined in operation S50 that the operation mode is the first operation mode, the controller 80 performs the first operation mode described later (S100).

However, if it is determined in operation S50 that the operation mode is not the first operation mode, the controller 80 determines whether the operation mode is the second operation mode (S60). If it is determined in operation S60 that the operation mode is the second operation mode, the controller 80 executes a second operation mode which will be described later (S200). However, if it is determined in operation S60 that the operation mode is not the second operation mode, the controller 80 performs a third operation mode which will be described later (S300).

It is determined whether an operation termination command is input during the process (S400). Step S400 includes operation termination by a program. If it is determined in operation S400 that the end of operation has been received, the controller 80 ends the operation.

8 is a control flowchart illustrating a first operation mode of an air conditioner according to the present invention.

Referring to FIG. 8, the controller 80 detects a temperature of the outside of the air conditioner, that is, an indoor temperature, through the temperature detection means 60 (S110). After the temperature detection, the controller 80 calculates a nonuniformity index (S120). In this case, the nonuniformity index means a temperature deviation at each position of the space where the indoor unit is installed, and in this embodiment, the left nonuniformity index (α1) and the right nonuniformity index (β1) representing the temperature deviations of the left, right, top and bottom four points based on the indoor unit. , Upper nonuniformity index (α2) and lower nonuniformity index (β2). The nonuniformity index may be calculated by multiplying the difference between the indoor temperature and the set temperature at each location by a predetermined value. For example, if the set temperature is 25 degrees and the temperature on the left side of the indoor unit is 30 degrees, the difference between the set temperature and the room temperature is 5 degrees, and 4.5 is multiplied by 0.9 and 5, which is the difference between both temperatures, to become the left unevenness index. At this time, the number of times of difference between the set temperature and the room temperature can be multiplied to calculate the nonuniformity index.

After calculating the nonuniformity index, the controller 80 determines whether the left temperature T1 detected by the first temperature detector 61 is greater than the sum of the set temperature set by the user and the left nonuniformity index α1 calculated in step S120. Determine (S130). That is, it is determined whether T1> (set temperature + α1). If it is determined in step S130 that the left temperature T1 is greater than the sum of the set temperature and the left unevenness index α1, the controller 80 determines that the right temperature T2 detected by the second temperature detector 62 is the user. It is determined whether the set temperature is greater than the sum of the right unevenness index β1 calculated in step S120 (S140). That is, it is determined whether T2> (set temperature + β1).

If it is determined in step S140 that the right temperature T2 is greater than the sum of the set temperature and the right unevenness index β1, the controller 80 controls the first fan driver 91 to increase the speed of the left fan 32a. In step S150, the speed of the right fan 32b of the second fan driving unit 92 is increased (S160). However, if it is determined in step S140 that the right temperature T2 is not greater than the sum of the set temperature and the right unevenness index β1, the controller 80 controls the first fan driver 91 to control the left fan 32a. The speed is increased (S141) and the second fan driver 92 is controlled to maintain the speed of the right fan 32b at the current speed (S142).

On the other hand, if it is determined in step S130 that the left temperature T1 is not greater than the sum of the set temperature and the left unevenness index α1, the controller 80 determines the right temperature T2 detected by the second temperature detector 62. It is determined whether the sum is greater than the sum of the set temperature set by the user and the right unevenness index β1 calculated in step S120 (S131). That is, it is determined whether T2> (set temperature + β1).

If it is determined in step S131 that the right temperature T2 is greater than the sum of the set temperature and the right unevenness index β1, the controller 80 controls the first fan driver 91 to maintain the speed of the left fan 32a. In step S132, the second fan driving unit 92 is controlled to increase the speed of the right fan 32b (S133). However, if it is determined in step S131 that the right temperature T2 is not greater than the sum of the set temperature and the right unevenness index β1, the controller 80 automatically operates the left fan 32a (S134) and the right fan ( 32b) is automatically operated (S135).

After performing the above-described steps S133, S135, S142, and S160, the controller 80 sets the current driving mode to the second driving mode (S170) and returns.

9 is a control flowchart illustrating a second operation mode of the air conditioner according to the present invention.

9, the controller 80 detects the temperature of the outside of the air conditioner through the temperature detection means 60 (S210). After detecting the temperature, the controller 80 calculates a nonuniformity index (S220). The nonuniformity index includes a left nonuniformity index (α1), a right nonuniformity index (β1), an upper nonuniformity index (α2), and a lower nonuniformity index (β2).

After calculating the nonuniformity index, the controller 80 determines whether the left temperature T1 detected by the first temperature detector 61 is greater than the sum of the set temperature set by the user and the left nonuniformity index α1 calculated in step S120. Determine (S230). That is, it is determined whether T1> (set temperature + α1). If it is determined in step S230 that the left temperature T1 is greater than the sum of the set temperature and the left unevenness index α1, the controller 80 determines that the right temperature T2 detected by the second temperature detector 62 is the user. It is determined whether the set temperature is greater than the sum of the right unevenness index β1 calculated in step S120 (S240). That is, it is determined whether T2> (set temperature + β1).

If it is determined in step S240 that the right temperature T2 is greater than the sum of the set temperature and the right unevenness index β1, the controller 80 determines that the left vertical wind direction blade 34a is at a predetermined angle, for example, 20 ° to 45 °. The first vertical wing driving unit 101 is controlled to swing to reciprocate therebetween (S250). In addition, the controller 80 controls the second vertical wing driving unit 102 to swing the right vertical wind direction blade 43b to reciprocate between a predetermined angle 20 ° to 45 ° (S260).

However, if it is determined in step S240 that the right temperature T2 is not greater than the sum of the set temperature and the right unevenness index β1, the controller 80 controls the first vertical wing driving unit 101 to control the left vertical wind vane ( 34a) swings back and forth between the predetermined angles (S241), and the right vertical wind vane (34b) controls the second vertical wing drive 112 to maintain the center position (S242).

On the other hand, if it is determined in step S230 that the left temperature T1 is not greater than the sum of the set temperature and the left unevenness index α1, the controller 80 determines the right temperature T2 detected by the second temperature detector 62. It is determined whether the sum is greater than the sum of the set temperature set by the user and the right unevenness index β1 calculated in step S120 (S231). That is, it is determined whether T2> (set temperature + β1).

If it is determined in step S231 that the right temperature T2 is greater than the sum of the set temperature and the right unevenness index β1, the controller 80 controls the first vertical wing driving unit 101 to control the left vertical wind direction blade 34a. It is fixed to the center position (S232), and controls the second vertical wing drive 102 to swing the right vertical wind direction 34b to reciprocate between the predetermined angle (S233). However, if it is determined in step S231 that the right temperature T2 is not greater than the sum of the set temperature and the right unevenness index β1, the controller 80 performs steps S250 and S260.

After performing the above steps S233, S242, and S260, the controller 80 sets the current driving mode to the third driving mode (S270) and returns.

10 is a control flowchart illustrating a third operation mode of the air conditioner according to the present invention.

Referring to FIG. 10, the controller 80 detects the temperature of the outside of the air conditioner through the temperature detection means 60 (S310). After the temperature detection, the controller 80 calculates a nonuniformity index (S320). The nonuniformity index includes a left nonuniformity index (α1), a right nonuniformity index (β1), an upper nonuniformity index (α2), and a lower nonuniformity index (β2).

After calculating the nonuniformity index, the controller 80 determines whether the upper temperature T3 detected through the third temperature detector 63 is greater than the sum of the set temperature set by the user and the upper nonuniformity index α2 calculated in step S320. Determine (S330). That is, it is determined whether T3> (set temperature + α2). If it is determined in step S330 that the left temperature T3 is greater than the sum of the set temperature and the upper nonuniformity index α2, the controller 80 determines that the lower temperature T4 detected by the fourth temperature detector 64 is a user. It is determined whether the set temperature is greater than the sum of the lower nonuniformity index β2 calculated in step S320 (S340). That is, it is determined whether T4> (set temperature + β2).

If it is determined in step S340 that the lower temperature T4 is greater than the sum of the set temperature and the lower nonuniformity index β2, the controller 80 controls the first horizontal wing driving unit 111 to control the left horizontal wind vane 35a. Swinging in the vertical direction (S350), and control the second horizontal wing drive 112 to swing the right horizontal wind vane (35b) in the vertical direction (S360). However, if it is determined in step S340 that the lower temperature T4 is not greater than the sum of the set temperature and the lower nonuniformity index β2, the controller 80 controls the first horizontal wing driving unit 111 to control the left horizontal wind vane ( 35a) is fixed upwards (S341), and the second horizontal wing drive unit 112 is controlled to fix the right horizontal wind vane 35b upwards (S342).

On the other hand, if it is determined in step S330 that the upper temperature T3 is not greater than the sum of the set temperature and the upper nonuniformity index α2, the controller 80 detects the lower temperature T4 through the fourth temperature detector 64. Determining whether the user is greater than the sum of the set temperature set by the user and the lower nonuniformity index (β2) calculated in step (S120) (S331). That is, it is determined whether T4> (set temperature + β2).

If it is determined in step S331 that the lower temperature T4 is greater than the sum of the set temperature and the lower nonuniformity index β2, the controller 80 controls the first horizontal wing driving unit 111 to control the left horizontal wind vane 35a. Fixing downward (S332), and control the second horizontal wing drive 112 to fix the right horizontal wind vane (35b) downward (S333). However, if it is determined in step S331 that the lower temperature T4 is not greater than the sum of the set temperature and the lower nonuniformity index β2, the controller 80 performs steps S350 and S360.

After performing the above steps S333, S342 and S360, the controller 80 sets the current driving mode to the first driving mode S370 and returns.

As described in detail above, according to the control method of the air conditioner according to the present invention, by controlling the speed and the wind direction of the fan according to the temperature nonuniformity of the air conditioning space to perform the concentrated air conditioning and dispersion air conditioning, the temperature uniformity of the air conditioning space It can provide a comfortable indoor environment, and improve the temperature uniformity in a short time, thereby saving energy.

1 is a perspective view for explaining a conventional air conditioner.

2 is an exploded perspective view for explaining the configuration of the air conditioner according to the present invention.

3 is a cross-sectional view for explaining the configuration of the air conditioner according to the present invention.

Figure 4 is a longitudinal cross-sectional view for explaining the configuration of the air conditioner according to the present invention.

5 is a block diagram illustrating the configuration of an air conditioner according to the present invention.

6 is an explanatory diagram for explaining the air flow of the air conditioner according to the present invention.

7 is an overall control flow chart for explaining the control method of the air conditioner according to the present invention.

8 is a control flowchart illustrating a first operation mode of a control method of an air conditioner according to the present invention.

9 is a control flowchart illustrating a second operation mode of the control method of the air conditioner according to the present invention.

10 is a control flowchart illustrating a third operation mode of the control method of the air conditioner according to the present invention.

* Description of the symbols for the main parts of the drawings *

32a: left fan 32b: right fan

34a: Left vertical wind vane 34b: Right vertical wind vane

35a: Left horizontal wind vane 35b: Right horizontal wind vane

40: input unit 50: display unit

61: first temperature detector 62: second temperature detector

63: third temperature detector 64: fourth temperature detector

80: control unit

Claims (10)

In the control method of the air conditioner, Measure the room temperature at at least one location in the room where the indoor unit is installed, Comparing the indoor temperature and the reference temperature to calculate a temperature nonuniformity index at the at least one location, Using the nonuniformity index to determine the degree of temperature nonuniformity in the at least one location, Control method of the air conditioner, characterized in that for changing the discharge pattern of the air conditioner to eliminate the temperature irregularity delete The method of claim 1, The air conditioner has an opening for introducing indoor air on the front surface of the cabinet forming the exterior, left and right discharge ports provided on one side of both sides of the cabinet to discharge the cooled air into the indoor space; Left and right pans provided at the left and right outlets, and installed to correspond to the vertical length of the left and right outlets to adjust the left and right wind direction, the left and right vertical wind vane, and the left and right horizontal to adjust the up and down wind direction With wind vane, The driving step may include a first driving mode for controlling wind speeds of the left and right fans, a second driving mode for adjusting left and right vertical wind vanes, and a left and right horizontal wind vane; And a third operation mode for adjusting the up and down wind direction by adjusting the air conditioner. The method of claim 3, wherein The operation mode is a control method of the air conditioner, characterized in that repeated sequentially. The method of claim 3, wherein The first operation mode, A calculation step of detecting an indoor temperature of the left and right sides of the air conditioner and calculating respective temperature non-uniformity indexes according to the set temperature and the indoor temperature of the left and right sides; A comparison step of comparing a temperature non-uniformity index between the room temperature of the air conditioner left and right, the set temperature and the room temperature of the left and right; And controlling the speed of the left and right fans according to the comparison result. The method of claim 5, wherein The control step, If the indoor temperature on the left side of the air conditioner is equal to or greater than the sum of the temperature nonuniformity index between the set temperature and the indoor temperature on the left side, and the indoor temperature on the right side of the air conditioner is equal to or more than the sum of the temperature nonuniformity index between the set temperature and the indoor temperature on the right side, Increasing the speed of the left and right fans, When the room temperature on the left side of the air conditioner is equal to or greater than the sum of the temperature nonuniformity index between the set temperature and the room temperature on the left side, and the room temperature on the right side of the air conditioner is not more than the sum of the temperature nonuniformity index between the set temperature and the room temperature on the right. Increasing only the speed of the left fan; When the room temperature on the left side of the air conditioner is not more than the sum of the temperature unevenness index between the set temperature and the room temperature on the left side, and the room temperature on the right side of the air conditioner is more than the sum of the temperature unevenness index between the set temperature and the room temperature on the right side. And raising only the speed of the right fan. The method of claim 3, wherein The second operation mode, A calculation step of detecting an indoor temperature of the left and right sides of the air conditioner and calculating respective temperature nonuniformity indexes according to the set temperature and the left and right indoor temperatures; A comparison step of comparing a temperature non-uniformity index between the room temperature of the air conditioner left and right, the set temperature and the room temperature of the left and right; And a control step of controlling the left and right wind directions according to the comparison result. The method of claim 7, wherein The control step, If the indoor temperature on the left side of the air conditioner is equal to or greater than the sum of the temperature nonuniformity index between the set temperature and the indoor temperature on the left side, and the indoor temperature on the right side of the air conditioner is equal to or more than the sum of the temperature nonuniformity index between the set temperature and the indoor temperature on the right side, Swinging the left and right vertical wind vanes within a predetermined angle; When the room temperature on the left side of the air conditioner is equal to or greater than the sum of the temperature nonuniformity index between the set temperature and the room temperature on the left side, and the room temperature on the right side of the air conditioner is not more than the sum of the temperature nonuniformity index between the set temperature and the room temperature on the right. Swinging the left vertical wind vane within the predetermined angle and fixing the right vertical wind vane at a center point of the predetermined angle; When the room temperature on the left side of the air conditioner is not more than the sum of the temperature unevenness index between the set temperature and the room temperature on the left side, and the room temperature on the right side of the air conditioner is more than the sum of the temperature unevenness index between the set temperature and the room temperature on the right side. And fixing the left vertical wind vane to a center point of the predetermined angle and swinging the right vertical wind vane within the predetermined angle. The method of claim 3, wherein The third driving mode, A calculation step of detecting an indoor temperature of the upper and lower parts of the air conditioner and calculating respective temperature non-uniformity indexes according to the set temperature and the upper and lower indoor temperatures; A comparison step of comparing the temperature nonuniformity index between the indoor temperature of the upper and lower parts of the air conditioner with the set temperature and the indoor temperature of the upper and lower parts; And a control step of controlling the up-and-down wind direction according to the comparison result. The method of claim 9, The control step, When the indoor temperature of the upper part of the air conditioner is equal to or more than the sum of the temperature nonuniformity index between the set temperature and the indoor temperature of the upper part, and the indoor temperature of the lower part of the air conditioner is equal to or more than the sum of the temperature nonuniformity index between the set temperature and the lower room temperature Swinging the left and right horizontal wind vanes within a predetermined angle; When the indoor temperature of the upper part of the air conditioner is not less than the sum of the temperature unevenness index between the set temperature and the indoor temperature of the upper part, and the indoor temperature of the lower part of the air conditioner is not equal to or more than the sum of the temperature unevenness index of the set temperature and the room temperature of the lower part Fixing the left and right horizontal wind vanes upwards, When the indoor temperature of the upper part of the air conditioner is not more than the sum of the temperature unevenness index between the set temperature and the indoor temperature of the upper part, and the indoor temperature of the lower part of the air conditioner is more than the sum of the temperature unevenness index of the set temperature and the indoor temperature of the lower part The control method of the air conditioner comprising the step of fixing the left and right horizontal wind vane downward.