KR100187235B1 - Airconditioner and its control method - Google Patents

Abstract

The present invention relates to an air conditioner and a control method thereof, wherein the air conditioner includes a suction grill having a suction hole for supplying indoor air to an indoor unit, and a first temperature for detecting a temperature of indoor air sucked from one side of the indoor unit. In the suction grill according to the detection sensor, the second temperature detection sensor for detecting the temperature of the indoor air sucked from the other side of the indoor unit, and the temperature of the indoor air detected by the first temperature detection sensor and the second temperature detection sensor And a position changing means for changing the position of the suction grill to change the amount of air sucked in. The control method of the air conditioner is the opening degree of the left and right sides of the suction grill according to the temperature of the indoor air on the left and right sides of the suction grill. It is characterized by uniformly distributing the temperature of the room by changing the.

Description

Air conditioner and its control method

1 is an external perspective view of an air conditioner according to an embodiment of the present invention.

2 is an external perspective view of the suction grill shown in FIG.

3 is a front view of the indoor unit of the air conditioner shown in FIG. 1 with the suction grille removed.

4 is a cross-sectional view of the air conditioner according to an embodiment of the present invention when the opening degrees of the left side and the right side of the suction grill are the same.

5 is a cross-sectional view of an air conditioner according to an embodiment of the present invention in which the opening degree of the left side of the suction grille is greater than the opening degree of the right side of the suction grille.

6 is a cross-sectional view of an air conditioner according to an embodiment of the present invention in which the opening degree on the right side of the suction grill is smaller than the opening degree on the left side of the suction grill.

7 is a longitudinal sectional view of the air conditioner shown in FIG.

8 is a control circuit block diagram of an air conditioner according to an embodiment of the present invention.

9 is a flowchart of a method for controlling an air conditioner according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

2: indoor unit 4: suction grill

6 suction hole 26 second fixing member

28: third fixing member 38: first stepping motor

40: second stepping motor 50: first temperature detection sensor

52: second temperature detection sensor 54: indoor fan

56 control means 60 second motor drive circuit

82: third motor drive circuit 84: position change means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner and a control method thereof, and more particularly, to an air conditioner and a control method capable of changing the opening degree of left and right sides of a suction grill.

In the conventional air conditioner, the suction grille is provided in front of the indoor unit, and is fixed to the indoor unit so that its position is not changed.

Since the suction grill is in the indoor unit so that the position of the suction grill does not change as described above, it is difficult to distribute the temperature of the room evenly because the direction of the air sucked from the room to the indoor unit is fixed. There was a time-consuming problem.

Accordingly, an object of the present invention is to provide an air conditioner and a control method capable of uniformly distributing a room temperature.

In order to achieve the above object, an air conditioner according to the present invention includes a suction grill having a suction hole for supplying indoor air to an indoor unit, a first temperature detection sensor for detecting a temperature of indoor air sucked from one side of the indoor unit; The second temperature detection sensor for detecting the temperature of the indoor air sucked from the other side of the indoor unit, and the air sucked in the suction grill according to the temperature of the indoor air detected by the first temperature detection sensor and the second temperature detection sensor And position changing means for changing the position of the suction grill to change the amount.

In addition, the control method of the air conditioner according to the present invention detects the first indoor temperature (T1), which is the temperature of the indoor air sucked from one side of the indoor unit and at the same time the first temperature of the indoor air sucked from the other side of the indoor unit Detects room temperature T2 and determines whether a difference between the first indoor temperature T1 and the second indoor temperature T2 is greater than a first preset temperature ΔT1 preset in the control means, and determines the first temperature. When it is determined that the difference between the room temperature T1 and the second room temperature T2 is greater than the first preset temperature ΔT1 preset by the control means, the opening degree of one side of the suction grill is opened to the other side of the suction grill. It is characterized by driving the stepping motor to be larger than the degree.

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

As shown in Figs. 1 to 7, the indoor unit 2 which harmonizes the indoor air is provided with a suction grill 4 to suck the indoor air. The suction grille 4 is formed with a suction hole 6 for sucking the indoor air. The indoor unit 2 under the suction grille 4 is formed with a discharge port 8 for discharging air from the indoor unit 2 to the room.

The discharge port 8 has a horizontal louver 10 for controlling the vertical direction of the air discharged from the indoor unit 2 to the room, and a vertical louver for controlling the left and right directions of the air discharged from the indoor unit 2 to the room ( 12) is installed. The lower part of the indoor unit 2 is provided with a light receiving unit 14 for receiving a control signal of light transmitted from a remote controller (not shown). The indoor unit 2 below the light receiving unit 14 receives a display signal indicating a state of air conditioning from a control unit described later and displays a state of air conditioning of one of 'operation', 'reservation', and 'blowing' ( 16) is installed. The indoor unit 2 under the display section 16 is provided with an operation select switch 18 for manually selecting the air conditioning operation without using the remote controller. The remote controller, the light receiving unit 14, and the operation selection switch 18 constitute key input means for inputting a user's operation command to the control means described later in the air conditioner according to the embodiment of the present invention.

In order to drive the compressor and the outdoor fan, which will be described later, the lower portion of the indoor unit 2 is provided with a wire pipe 20 for protecting the wire. The refrigerant pipe 22 is provided at the lower portion of the indoor unit 2 so as to circulate the refrigerant from the compressor described later and the condenser not shown to the indoor unit 2.

FIG. 2 is an external perspective view of the suction grill 4 showing the inner side of the suction grill 4 shown in FIG. As shown in FIG. 2, first fixing members 24 and 25 are provided above and below the suction grill 4 to fix the suction grill 4 to the indoor unit 2. Ends of the first fixing members 24 and 25 are formed in an L-shape to prevent the suction grille 4 from being separated from the indoor unit 2. A second fixing member 26 is formed at one side of the suction grill 4 so as to fix the suction grill 4 to the indoor unit 2 and determine an opening degree of one side of the suction grill 4. have. A third fixing member 28 is formed on the other side of the suction grill 4 to fix the suction grill 4 to the indoor unit 2 and to determine the opening degree of the other side of the suction grill 4. have. In the air conditioner according to an embodiment of the present invention, one side of the suction grille 4 means the left side of the suction grille 4, and the other side of the suction grille 4 is the right side of the suction grille 4. Means. The second fixing member 26 and the third fixing member 28 have racks to determine the opening degree of one side and the other side of the suction grill 4 according to rotation of the first stepping motor and the second stepping motor which will be described later. 26a and 28a are formed.

3 is a front view of the indoor unit 2 shown in FIG. 1 with the suction grille 4 removed. 3 to 7, first fixing holes 30 and 32 for fixing the first fixing members 24 and 25 of the suction grille 4 are provided on the front surface of the indoor unit 2. Formed. A second fixing hole 34 and a third fixing hole 36 for fixing the second fixing member 26 and the third fixing member 28 of the suction grille 4 are formed on the front surface of the indoor unit 2. It is. In the indoor unit 2, a first stepping motor 38 determining an opening degree of one side of the suction grill 4, and a second stepping motor 40 determining an opening degree of the other side of the suction grill 4. ) Is installed. The first pinion 42 is installed on the rotation shaft 38a of the first stepping motor 38 to move one end of the suction grill 4 in accordance with the rotation of the first stepping motor 38. The second pinion 44 is installed on the rotation shaft of the second stepping motor 40 to move the other end of the suction grill 4 according to the rotation of the second stepping motor 40. A locking surface 46 is formed on the upper side and the lower side of the indoor unit 2 to prevent detachment of the ends of the first fixing members 24 and 25 of the suction grill 4.

As shown in FIGS. 4 to 7, an indoor heat exchanger 48 heat exchanges air entering the indoor unit 2 from the room through the suction hole 6 of the suction grill 4. (2) It is installed inside.

The first temperature detection sensor 50 is provided on one surface of the indoor heat exchanger 48 to detect the temperature of the indoor air sucked from one side of the indoor unit 2.

The second temperature detection sensor 52 is provided on the other surface of the indoor heat exchanger 48 to detect the temperature of the indoor air sucked from the other side of the indoor unit 2.

The indoor fan 54 sucks indoor air into the suction hole 6 and simultaneously passes through the surface of the indoor heat exchanger 48 to discharge the heat-exchanged indoor air into the interior of the indoor heat exchanger 48. It is installed on the lower side.

As shown in FIG. 8, the control means 56 is a microcomputer for controlling the air conditioning operation and the position change operation of the suction grille 4 according to an embodiment of the present invention.

The power supply unit 58 receives an AC voltage from an external AC power supply and supplies an AC voltage of 220V to a compressor driving circuit and a fan motor driving circuit, which will be described later, and at the same time, a louver motor driving circuit, a second motor driving circuit, and a third which will be described later. It is a transformer, rectification, and voltage adjustment circuit for supplying a DC voltage of 12V to the motor drive circuit and a DC voltage of 5V to the control means 56.

The initialization circuit 60 receives a DC voltage of 5V from the power supply means 58 when the AC voltage of 220V is supplied to the power supply means 58 from an external AC power supply and initializes the control means 56 to the control means 56. It is a capacitor that outputs.

The light receiving unit 14 is a light receiving module that receives a control signal of an operating mode and driving conditions made of infrared rays from the remote controller and outputs a control signal to the control means 56.

The display unit 62 is a light emitting diode displaying a state of air conditioning.

The operation selector switch 18 is one of 'cooling', 'automatic' and 'remote controller' so that the user inputs an operation command of one of 'cooling', 'automatic' and 'remote controller' to the control means 56. It is a switch to manually select one operation command.

The indoor humidity detecting means 64 for detecting the humidity of the indoor air is a humidity sensor which inputs the humidity of the indoor air to the control means 56.

The indoor humidity detecting means 66 for detecting the temperature of the room includes the first temperature detecting sensor 50 for inputting the temperature of the indoor air sucked from one side of the indoor unit 2 to the control means 56, and the indoor unit. And the second temperature detection sensor 52 which inputs the temperature of the indoor air sucked from the other side of (2) to the control means 56.

The louver motor drive circuit 68 controls the power supply means 58 and the control to output a DC voltage of one of a variety of magnitudes and directions of DC voltages in accordance with a control signal output from the control means 56. It is a switching circuit connected between the means 56. The louver motor 70 is a stepping motor which receives the DC voltage from the louver motor driving circuit 68 and rotates the horizontal louver 10.

The fan motor driving circuit 72 applies the AC voltage of one of various sizes to the fan motor 74 according to the control signal output from the control means 56 and the power supply means 58 and the fan motor. It is a switching circuit connected between 74. The fan motor 74 is connected to the indoor fan 54 to rotate the indoor fan 54.

The compressor drive circuit 76 is a switch connected between the power supply means 58 and the compressor 78 to apply an AC voltage of 220V to the compressor 78 according to the control signal output from the control means 56. to be.

The second motor driving circuit 80 and the power supply means 58 and the power supply means to output the DC voltage of one of the magnitude and direction of the various magnitudes and directions according to the control signal output from the control means 56 It is a switching circuit connected between the control means 56. The first stepping motor 38 receives the direct current voltage output from the second motor driving circuit 80 and rotates the second motor driving circuit 80 to determine the opening degree of one side of the suction grill 4. Is connected to.

The third motor driving circuit 82 and the power supply means 58 and the power supply means to output a DC voltage of one of the magnitude and the direction of the DC voltage of various magnitudes and directions according to the control signal output from the control means 56 It is a switching circuit connected between the control means 56. The second stepping motor 40 receives the direct current voltage output from the third motor driving circuit 82 and rotates to determine the opening degree of one side of the suction grille 4. Is connected to. The first stepping motor 38 and the second stepping motor 40 are indoor air detected by the first temperature detecting sensor 50 and the second temperature detecting sensor 52 in one embodiment of the present invention. Position changing means 84 for changing the position of the suction grill 4 to change the amount of air sucked in the suction grill 4 in accordance with the temperature of.

Hereinafter, a control method of an air conditioner according to an embodiment of the present invention will be described in connection with an air conditioner according to an embodiment of the present invention configured as described above.

In FIG. 9, S denotes a step.

First, as an initial condition for explaining the operation, it is assumed that the opening degree of one side and the other side of the suction grill 4 is the same as L1 as shown in FIG. In the control method of the air conditioner according to an embodiment of the present invention, the opening degree of one side and the other side of the suction grille 4 means the interval between the indoor unit 2 and the suction grille 4.

First, in step S1, when the user inserts the plug connected to the power supply means 58 into the outlet, an AC voltage of 220V is output to the power supply means 58 from an external AC power source. Next, an AC voltage of 220 V is output from the power supply means 58 to the compressor drive circuit 76 and the fan motor drive circuit 72, and from the output terminal VCC of the power supply means 58. A DC voltage of 12 V is output to the louver motor driving circuit 68, the second motor driving circuit 80, and the third motor driving circuit 82. At the same time, a DC voltage of 5 V is output from the output terminal VDD of the power supply means 58 to the initialization circuit 60, the control means 56 and the room temperature detection means 66.

Next, a high level initialization command is output from the initialization circuit 60 to the control means 56. The control means 56 then initializes the variables specified in the memory of the control means 56 to control the air conditioning operation to harmonize the indoor air and the position change operation of the suction grille 4.

In step S2, the user inputs an operation mode and an operation condition to the remote controller. The infrared control signal is then output from the remote controller to the light receiving unit 14. Next, from the light receiving unit 14, the control means 56 controls the operation mode of one of 'automatic', 'cooling', 'dehumidification', and 'blowing' and operation conditions for wind direction, air volume, and room temperature. Is output.

Next, in step S3, the control means 56 determines whether an operation start command has been input from the light receiving portion 14 or the operation selection switch 18. As a result of this determination, in the case where it is determined that the operation start command is input to the control means 56 from the light receiving portion 14 or the operation selection switch 18, the flow proceeds to step S4.

In step S4, the louver motor drive circuit 68, the fan motor drive circuit 72 and the compressor drive circuit from the control means 56 in accordance with the operating conditions input from the light receiving portion 14 to the control means 56. A control signal is output to 76. At the same time, a display signal indicating the current state of air conditioning is output from the control means 56 to the display portion 16. Next, a voltage is applied from the louver motor drive circuit 68 to the louver motor 70, a voltage is applied from the fan motor drive circuit 72 to the fan motor 74, and the compressor drive circuit 76 is applied. Is applied to the compressor 78.

Then, the direction of the horizontal louver 10 is set according to the rotation of the louver motor 70. At the same time, the indoor fan 54 rotates in accordance with the rotation of the fan motor 74. At the same time, the compressor 78 is operated to compress the refrigerant.

When the indoor fan 54 rotates, one side and the other side of the suction grille 4 are separated from the indoor unit 2 by an opening degree L1, and thus, between the suction grille 4 and the indoor unit 2. Indoor air is sucked into the indoor unit 2 through the suction hole 6 formed in the space and the front surface of the suction grille 4. The indoor air is then heat exchanged in the indoor heat exchanger 32 so that the indoor air is conditioned. Then, for example, the room is cooled.

Next, in step S5, a first room temperature T1, which is a temperature of indoor air on one side of the suction grille 4, is detected from the first temperature detection sensor 50, and the first temperature detection sensor 50 detects the above-mentioned temperature from the first temperature detection sensor 50. The first indoor temperature T1 is output to the control means 56. At the same time, a second indoor temperature T2, which is a temperature of indoor air on the other side of the suction grille 4, is detected from the second temperature detection sensor 52, and the control means 56 is received from the second temperature detection sensor 52. ) The second room temperature T2 is output.

Next, in step S6, the control means 56 determines that the difference? T between the first room temperature T1 and the second room temperature T2 represented by Equation (1) is the control means 56. Is greater than the first preset temperature difference? T1. The first preset temperature difference DELTA T1 set in advance in the control means 56 is, for example, 1 ° C.

△ T = T1-T2 ----------- (1)

As a result of this determination, when it is determined that the difference ΔT between the first indoor temperature T1 and the second indoor temperature T2 is greater than the first preset temperature difference ΔT1 preset in the control means 56. (YES), the flow proceeds to step S7.

In step S7, a control signal is output from the control means 56 to the second motor drive circuit 80, and a control signal is output from the control means 56 to the third motor drive circuit 82. Subsequently, a voltage is applied to the first stepping motor 38 from the second motor driving circuit 80. The first stepping motor 38 then rotates. As the first stepping motor 38 rotates, the first pinion 42 rotates. Then, the second fixing member 26 moves so that the opening degree of one side of the suction grille 4, which is the distance between the indoor unit 2 and the suction grille 4, becomes L2. At the same time, a voltage is applied to the second stepping motor 40 from the third motor driving circuit 82. Then, the second stepping motor 40 rotates. As the second stepping motor 40 rotates, the second pinion 44 rotates. Then, the third fixing member 28 moves so that the opening degree of the other side of the suction grille 4, which is the distance between the indoor unit 2 and the suction grille 4, becomes L3. As a result, as shown in FIG. 5, the opening degree of one side of the suction grille 4 is greater than the opening degree of the other side of the suction grille 4. Subsequently, as shown by an arrow in FIG. 5, the amount of air sucked from one side of the suction grille 4 is greater than the amount of air sucked from the other side of the suction grille 4. The temperature of one side is lowered faster than the temperature of the other side of the suction grill (4).

Next, in step S8, the control means 56 determines whether an operation stop command has been input from the light receiving portion 14 to the control means 56. As a result of this determination, when it is determined from the light receiving section 14 that the operation stop command has been input to the control means 56 (if YES), the processing proceeds to step S9.

In step S9, a drive stop signal is output from the control means 56 to the louver motor drive circuit 68, the fan motor drive circuit 72, and the compressor drive circuit 76. At the same time, a control signal is output from the control means 56 to the second motor drive circuit 80 and the third motor drive circuit 82. Then, no voltage is applied to the louver motor 70 from the louver motor driving circuit 68 so that the operation of the louver motor 70 is stopped. At the same time, no voltage is applied to the fan motor 74 from the fan motor driving circuit 72 so that the rotation of the fan motor 74 stops, thereby stopping the rotation of the indoor fan 54. At the same time, no voltage is applied to the compressor 78 from the compressor driving circuit 76, so that the operation of the compressor 78 is stopped. The refrigerant is not compressed in the compressor 78 and the indoor air is not circulated so that the indoor air is not harmonized.

A voltage is then applied from the second motor drive circuit 80 to the first stepping motor 38 to place the first stepping motor 38 in the initial position. The first stepping motor 38 then rotates. As the first stepping motor 38 rotates, the first pinion 42 rotates. Then, the second fixing member 26 is moved so that the opening degree of one side of the suction grille 4, which is the distance between the indoor unit 2 and the suction grille 4, is equal to L1, which is the opening degree of the initial operation state. . At the same time, a voltage is applied from the third motor drive circuit 82 to the second stepping motor 40 to place the second stepping motor 40 in an initial position. Then, the second stepping motor 40 rotates. As the second stepping motor 40 rotates, the second pinion 44 rotates. Then, the opening degree of the other side of the suction grille 4 is equal to L1 which is the opening degree of the operation initial state. As a result, as shown in FIG. 4, the opening degree of one side of the suction grille 4 is equal to the opening degree of the other side of the suction grille 4 so that the suction grille 4 is in the initial position. .

Next, in step S10, the control means 56 determines whether an AC voltage of 220V is being supplied to the power supply means 58 from an external AC power supply at present. As a result of this determination, the level of the voltage supplied from the power supply means 58 to the control means 56 is smaller than the level preset to the control means 56, so that the power supply means 58 is supplied from an external AC power source. If it is determined that the AC voltage of 220V is not supplied (NO), the control program for the air conditioning operation and the position change operation of the suction grille 4 is terminated.

On the other hand, it is determined in step S6 that the difference ΔT between the first indoor temperature T1 and the second indoor temperature T2 is not greater than the first predetermined temperature difference ΔT1 preset in the control means 56. If NO (NO), the process proceeds to step S11.

In step S11, the control means 56 determines that the difference? T between the first room temperature T1 and the second room temperature T2 is set in advance to the control means 56 by a first set temperature difference? T1) or less and at the same time, it is determined whether the control means 56 is larger than the second preset temperature difference DELTA T2. The second preset temperature difference ΔT2 set in advance in the control means 56 is, for example, -1 ° C. As a result of this determination, the difference [Delta] T between the first indoor temperature T1 and the second indoor temperature T2 is equal to or less than the first preset temperature difference [Delta] T1 preset in the control means 56. When it is determined that the control means 56 is larger than the second preset temperature difference ΔT2 (in the case of YES), the temperature T1 of the indoor air on one side of the intake grill 4 and the intake grill Since the difference in the temperature T2 of the room air on the other side of (4) is a minute state, it progresses to step S12.

In step S12, a control signal is output from the control means 56 to the second motor drive circuit 80, and a control signal is output from the control means 56 to the third motor drive circuit 82. A voltage is then applied from the second motor drive circuit 80 to the first stepping motor 38 to place the first stepping motor 38 in the initial position. The first stepping motor 38 then rotates. As the first stepping motor 38 rotates, the first pinion 42 rotates. Then, the second fixing member 26 is moved so that the opening degree of one side of the suction grille 4, which is the distance between the indoor unit 2 and the suction grille 4, is equal to L1, which is the opening degree of the initial operation state. . At the same time, a voltage is applied from the third motor drive circuit 82 to the second stepping motor 40 to place the second stepping motor 40 in an initial position. Then, the second stepping motor 40 rotates. As the second stepping motor 40 rotates, the second pinion 44 rotates. Then, the opening degree of the other side of the suction grille 4 is equal to L1 which is the opening degree of the operation initial state. As a result, as shown in FIG. 4, the opening degree of one side of the suction grille 4 is equal to the opening degree of the other side of the suction grille 4. Subsequently, as shown by an arrow in FIG. 4, the amount of air sucked in one side of the suction grille 4 is equal to the amount of air sucked in the other side of the suction grille 4, so that one side of the suction grille 4 is used. Maintains the temperature (T1) close to the temperature (T2) of the other side of the suction grill (4).

Next, the flow advances to step S8 to determine whether an operation stop command is input from the light receiving unit 14 to the control means 56 as described above.

On the other hand, the difference ΔT between the first indoor temperature T1 and the second indoor temperature T2 in step S11 is less than the second preset temperature difference ΔT2 preset in the control means 56. If it is discriminated (NO), since the temperature T2 of the room air on the other side of the suction grill 4 is significantly higher than the temperature T1 of the room air on one side of the suction grill 4, step S13. Proceed to

In step S13, a control signal is output from the control means 56 to the second motor drive circuit 80, and a control signal is output from the control means 56 to the third motor drive circuit 82. Subsequently, a voltage is applied from the second motor driving circuit 80 to the first stepping motor 38 so that the opening degree of one side of the suction grille 4 is L3. The first stepping motor 38 then rotates. As the first stepping motor 38 rotates, the first pinion 42 rotates. Then, the second fixing member 26 is moved so that the opening degree of one side of the suction grill 4 becomes an opening degree L3 smaller than the opening degree L1 of the initial operation state. At the same time, a voltage is applied from the third motor driving circuit 82 to the second stepping motor 40 so that the opening degree of the other side of the suction grill 4 is L2. Then, the second stepping motor 40 rotates. As the second stepping motor 40 rotates, the second pinion 44 rotates. Then, the opening degree of the other side of the said suction grille 4 becomes L2 which is an opening degree larger than L1 which is an opening degree of an operation initial state. Subsequently, the amount of air sucked from the other side of the suction grille 4 is greater than the amount of air sucked from one side of the suction grille 4 as illustrated by the arrow of FIG. The temperature (T2) of the lower than the temperature (T1) of one side of the suction grill (4).

Next, the flow advances to step S8 to determine whether an operation stop command is input from the light receiving unit 14 to the control means 56 as described above.

On the other hand, when it is determined in step S3 that no operation start command is input to the control means 56 from the light receiving unit 14 or the operation selection switch 18 (NO), the light receiving unit in step S3. (14) Or, it is continuously determined whether an operation start command has been inputted to the control means 56 from the operation selection switch 18.

On the other hand, when it is determined in step S8 that the operation stop command is not input from the light receiving unit 14 (NO), the process proceeds to the step S4, where the air in the room is continuously harmonized as described above, and the suction is performed. The position change operation of the grille 4 is controlled.

On the other hand, in step S10, the level of the voltage supplied from the power supply means 58 to the control means 56 is equal to or higher than the level set in advance in the control means 56 so that the power supply means ( 58, if it is determined that an AC voltage of 220V is supplied (YES), the process proceeds to the step S2 as described above, whereby the user operates the remote controller or the operation selection switch 18 in operation mode and operation. Wait for input of condition and operation start command.

On the other hand, in the above-described air conditioner and control method according to an embodiment of the present invention, one side of the suction grill 4 means the left side of the suction grill 4 and the other of the suction grill 4 The side means the right side of the suction grille 4.

On the other hand, as an air conditioner and a control method thereof according to another embodiment of the present invention, the opening degree of the upper side and the lower side of the suction grille 4 is changed according to the temperature difference between the upper side and the lower side of the suction grille 4. The suction grille 4, the first stepping motor 38, and the second stepping motor 40 may be combined.

According to the air conditioner and the control method according to the present invention as described above, there is a very excellent effect that can uniformly distribute the temperature of the room by changing the opening degree on the left and right of the suction grille.

Claims (3)

A suction grill having a suction hole for supplying indoor air to the indoor unit, a first temperature detection sensor detecting a temperature of indoor air sucked from one side of the indoor unit, and a temperature of indoor air sucked from the other side of the indoor unit In the air conditioner having a second temperature detection sensor, the suction to change the amount of air sucked in the suction grill according to the temperature difference of the indoor air detected by the first temperature detection sensor and the second temperature detection sensor The first stepping motor to determine the opening of one side of the grill, and the suction to change the amount of air sucked in the suction grill according to the temperature difference of the indoor air detected by the first temperature sensor and the second temperature detection sensor An air conditioner comprising: a second stepping motor for determining the other degree of opening of the grill. The first room temperature and the second room temperature are detected by detecting the first room temperature, which is the temperature of the indoor air sucked from one side of the suction grill, and the second room temperature, which is the temperature of the indoor air sucked from the other side of the suction grill. A temperature difference detection step of detecting a difference between the first and second temperature discrimination steps for determining whether the temperature difference detected in the temperature difference detection step is larger than a first set temperature difference preset in the control means, and a detected temperature difference in the first temperature difference determination step Is determined to be greater than a first set temperature difference, a position change step of driving the first and second stepping motors to increase the opening degree of one side of the suction grille than the other opening degree, and the detected temperature difference is determined by the first temperature difference determination step. If it is determined that the temperature difference is not greater than the set temperature difference, the temperature difference detected in the temperature difference detection step is equal to or less than the first predetermined temperature difference preset in the control means. A second temperature difference determination step of determining whether the temperature is greater than a second set temperature difference, and when the detected temperature difference is less than the first set temperature difference and larger than the second set temperature difference in the second temperature difference determination step, the first and second stepping motors are driven. The control method of the air conditioner, characterized in that made in the initial stage of position to maintain the one side opening and the other side opening of the suction grill in the initial operation state. The method of claim 2, wherein in the second temperature difference determination step, when it is determined that the detected temperature difference is less than the second set temperature difference, the first and second stepping motors are driven to reduce the opening degree of one side of the suction grill to the other opening degree. Control method of air conditioner made with.