KR100919401B1 - Multi-type air conditioner and controlling method of the same of - Google Patents

Abstract

The present invention relates to a multi-type air conditioner, and an object of the present invention is to achieve a sufficient cooling or heating target even in a region in which a defective indoor unit is installed among a plurality of indoor units or an environment in which an indoor environment is difficult to perform sufficient cooling or heating to one indoor unit. The present invention provides a multi-type air conditioner and a control method thereof.

To this end, a plurality of indoor units including an air inlet, an air outlet, and an airflow control member for controlling a direction of exhaust air discharged from the air outlet; It is determined whether the uniform airflow control method for controlling the airflow discharged from the plurality of indoor units is selected so that the indoor temperature is uniform. If the uniform airflow control method is not selected, the indoor unit having a defective airflow discharged from the plurality of indoor units is selected. It includes a control unit for performing a compensation control including a compensation airflow control method for compensating for the area in charge.

Description

Multi-type air conditioner and controlling method of the same of}

The present invention relates to an air conditioner, and more particularly, to provide a sufficient cooling or heating to be achieved even in a region in which a broken indoor unit is installed among a plurality of indoor units or an environment in which an indoor environment is difficult to perform sufficient cooling or heating to a single indoor unit. A multi-type air conditioner and a control method thereof.

In general, an air conditioner sucks hot air in a room and cools it with a low-temperature refrigerant and discharges it to the room to cool the room, or sucks cold air in a room and heats it with a high-temperature refrigerant to discharge it into the room. It is a device including a compressor, a condenser, an expansion valve and an evaporator to warm the room.

Such an air conditioner is installed outdoors and an outdoor unit having a compressor and a condenser installed therein and an indoor unit having an expansion valve and an evaporator installed therein.

On the other hand, in recent years, a multi-type air conditioner has been released in which a plurality of indoor units are integrally or individually configured to operate some or all indoor modules of a plurality of indoor units according to a user's selection.

However, when a plurality of indoor units of a conventional multi-type air conditioner are installed and operated in one room or room, when a failure occurs in any one of the plurality of indoor units, the target heating or There is a problem that the cooling is not made sufficiently.

When the environment of a room or a room where a plurality of indoor units are installed does not normally circulate indoor air in a specific area, or is a high temperature or low temperature environment, only an indoor unit that is responsible for cooling or heating a specific area is used for cooling or There is a problem that the heating is not enough

Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a target in a region in which a defective indoor unit is installed among a plurality of indoor units or an environment in which an indoor environment is difficult to perform sufficient cooling or heating to one indoor unit. It is an object of the present invention to provide a multi-type air conditioner and a method of controlling the same, which allow sufficient cooling or heating.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

       Multi-type air conditioner according to the present invention for achieving the above object is a plurality of indoor unit including an air inlet and air outlet and the air flow control member for controlling the direction of the discharged air discharged from the air outlet; It is determined whether the uniform airflow control method for controlling the airflow discharged from the plurality of indoor units is selected so that the indoor temperature is uniform. If the uniform airflow control method is not selected, the indoor unit having a defective airflow discharged from the plurality of indoor units is selected. It includes a control unit for performing a compensation control including a compensation airflow control method for compensating for the area in charge.

     Here, when the equalized airflow control method is selected, the control unit detects an equalized air demand indoor unit that is responsible for an area where an indoor temperature is different from an ambient temperature, and the air discharged from the plurality of indoor units is in charge of the equalized air demand indoor unit. It characterized in that it is controlled to be discharged to the region.

     The control unit may calculate a temperature average value of air introduced into each of the plurality of indoor units, and determine an indoor unit that is outside a predetermined range of the calculated average value as an equal airflow request indoor unit. Here, the controller detects a defective indoor unit by using a failure detection sensor installed in the plurality of indoor units, and directs the air discharged from the plurality of indoor units to a region in which the defective indoor unit is in charge. Characterized in that the operation of the indoor unit is stopped.

      In another aspect, the control method of the multi-type air conditioner according to the present invention comprises the steps of determining whether or not the uniform airflow control method for controlling the airflow discharged from the plurality of indoor units is selected so that the indoor temperature is uniform and the uniform airflow control method is selected. Otherwise, detecting a defective indoor unit of the plurality of indoor unit electrical appliances, and if a defective indoor unit is detected, airflow discharged from the plurality of indoor units is discharged to an area in charge of the defective indoor unit. Steps.

     Here, if the equalized airflow control method is selected, the equalized airflow demand indoor unit which is responsible for the area where the room temperature is different from the surrounding temperature is detected, and the air discharged from the plurality of indoor units is the area that is responsible for the equalized airflow demand indoor unit. Characterized in that the discharge. Here, the average value of the air temperature flowing into each of the plurality of indoor units is calculated, and the indoor unit outside the predetermined range of the calculated average value is characterized by detecting the equalizer airflow demand indoor unit.

      And the step of discharging to the area in charge of the defective indoor unit is characterized in that the operation of the defective indoor unit is stopped.

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

1 is a perspective view of an indoor unit of a multi-type air conditioner according to the present invention, and FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

Referring to FIG. 1, the multi-type air conditioner according to the present invention includes a control unit for controlling the first to fourth indoor units 100a, 100b, 100c and 100d and the first to fourth indoor units 100a, 100b, 100c and 100d ( 100).

Hereinafter, since the configuration of the first to fourth indoor units (100a, 100b, 100c, 100d) is substantially the same, it will be described limited to the third indoor unit (100c).

The third indoor unit 100c includes a third housing 101c forming an external appearance, a third air inlet 102c for introducing air into the third housing 101c, and air in the third housing 101c. A third air outlet 165c for discharging, a third heat exchanger 141c installed in the third anti-fogging 101c to allow refrigerant to flow therein, and to exchange heat with outside air, and a third heat exchanger A third indoor fan 161c and a third upstream flow control member installed on one side of the machine 141c to forcibly introduce air through the third air inlet 102c to be forcibly discharged to the third air outlet 165c. 181c and a third left and right airflow control member 152c.

In detail, a third temperature sensor 140c is installed between the third air intake 102c and the third heat exchanger 141c. The third temperature sensor 140c senses the temperature of the air flowing through the third inlet 102c and supplies the detected temperature information to the controller 300 (see FIG. 3).

And a third blowing fan motor 160c for rotating the third indoor blowing fan 161c is installed at one side of the third indoor blowing fan 161c. The third blowing fan motor 160c is rotated by the control unit 300 to be described later to rotate the third indoor blowing fan 161c. The flow rate of the air discharged through the air outlet 103c is controlled by the third blowing fan motor 160c in which the rotation speed is controlled. In other words, as the third blower fan motor 160c rotates at a high speed, the flow rate of air discharged through the air outlet 165c increases, and as the third blower fan motor 160c rotates at a low speed, the air outlet 165c The flow rate of air discharged through) decreases.

In addition, a third indoor blowing fan motor failure detecting sensor 190c for detecting a failure of the third indoor blowing fan motor 160c is installed at one side of the third indoor blowing fan motor 160c. The third indoor blowing fan motor failure detection sensor 190c is implemented as a rotational speed detection sensor to detect a failure of the third indoor blowing fan motor 160c. That is, the controller 300 causes the third indoor blowing fan motor 160c to rotate so that the third indoor blowing fan motor 160c has failed if the target rotational speed is not reached for a predetermined time. Here, it turns out that the rotational speed sensor can be generally implemented as a hall sensor.

In addition, a plurality of rotation shafts of the third left and right air flow control members 152c are installed in the vertical direction on the ceiling of the third air outlet 165c, and the third left and right air flows are arranged on the rotation shafts of the third left and right air flow control members 152c. The third left and right airflow control driver 151c for driving the control member 152c is connected. As the third left and right air flow control member 152c is driven to rotate left and right, the direction of the air discharged from the third air outlet 165c is selected. In addition, a third left and right air flow control driver failure detection sensor 150c is installed at one side of the third left and right air flow control driver 152c and used to detect a failure of the third left and right air flow control driver 152c. That is, the controller 300 may determine that the third left / right airflow control driver 152c has failed when the third left / right airflow control driver 152c is rotated and does not reach the target rotational amount for a predetermined time. Here, the third left and right air flow control drive failure detection sensor (150c) is a plurality of magnets in the circumferential direction is attached to the flange extending in a fan shape at the end of the rotating shaft, the hall sensor is provided in a position facing the plurality of magnets Could be. That is, by counting the number of pulses output from the Hall sensor, it is possible to detect the amount of rotation of the third left and right air flow control driving unit 151c.

The rotation shaft of the third upstream flow control member 181c is rotatably installed on both sidewalls of the third air outlet 165c in a horizontal direction. The three upstream and downstream control driving units 180c are installed to allow the third upstream and downstream control member 181c to rotate up and down. Accordingly, the direction of the air discharged from the third air outlet 165c may be changed up and down. In addition, a third upstream control section failure detection sensor 130c is installed at one side of the third upstream control section 180c to perform substantially the same configuration and operation as the third left and right airflow control section detecting sensor 150c described above. .

The third heat exchanger 141c includes a refrigerant tube (not shown) for allowing the refrigerant to flow and a plurality of heat dissipation fins (not shown) for inserting the refrigerant tube. The third heat exchanger 141c heats or cools the air introduced into the housing 101c using a coolant supplied from an outdoor unit (not shown) that supplies a coolant installed outdoors.

On the other hand, the outdoor unit including the compressor controlled by the controller 300 to be described later and the outdoor blower fan is used because a general outdoor unit used in the multi-type air conditioner will be omitted.

In addition, a display unit 11 is formed on one surface of the control unit 100 to display operating states of the first to fourth indoor units 100a, 100b, 100c, and 100d, and the outdoor unit, and on one side of the display unit 11, a control unit. It includes an input unit 120 for allowing a control command to be input to the control unit 300 formed inside the (100). Here, a more detailed description of the control unit 300 will be described later.

3 is a block diagram showing a control system of the multi-type air conditioner according to the present invention.

Referring to FIG. 3, the control system of the multi-type air conditioner 1 according to the present invention includes a control unit 300 which generally controls the first to fourth indoor units 100a, 100b, 100c and 100d and an outdoor unit installed outdoors. ), An input unit 120 through which a control command is input to the controller 300, and first to fourth blower fan motors 160a driven by the blower fan driver 310 controlled by the control signal of the controller 300. 160b, 160c, 160d, first to fourth upstream control drivers 180a, 180b, 180c, and 180d driven by the airflow control unit 320 driven by the control signal of the controller 300 and the first to fourth devices. The airflow control driving unit (170a, 170b, 170c, 170d) and the control unit 300 detects the temperature of the air sucked into the first to fourth indoor units (100a, 100b, 100c, 100d) to provide temperature information Fault plates of the first to fourth temperature sensors 140a, 140b, 140c, and 140d and the first to fourth upstream and downstream control driving units 180a, 180b, 180c, and 180d to the controller 300. First to fourth upstream control driver failure detection sensor (130a, 130b, 130c, 130d) for providing information for the first to fourth sinusoidal air flow control driver (170a, 170b, 170c) to the control unit 300 First to fourth blower fan motors 160a, 150b, 150c, and 150d to the first to fourth left and right airflow control units providing information for fault determination of the first and fourth blowing fan motors 160a and 170d. And first to fourth blower fan motor failure detection sensors 190a, 190b, 190c, and 190d for providing information for failure determination of the 160b, 160c, and 160d.

In detail, the controller 300 obtains temperature information of the air flowing into the first to fourth indoor units 100a, 100b, 100c, and 100d through the first to fourth temperature sensors 140a, 140b, 140c, and 140d. The first to fourth temperature sensors 140a, 140b, 140c, and 140d may determine whether the first to fourth temperature sensors 140a, 140b, 140c, and 140d have a failure by using a signal rating. Detailed description thereof has been described above and thus will be omitted.

In addition, the controller 300 detects a failure of the first to fourth upstream control driver 180a, 180b, 180c, 180d through the first to fourth upstream control driver failure detection sensors 130a, 130b, 130c, and 130d. Detect. Detailed description thereof has been described above and thus will be omitted.

In addition, the controller 300 may detect the failure of the first to fourth upstream and downstream control control units 170a, 170b, 170c, and 170d through the first to fourth left and right airflow control driver failure detection sensors 150a, 150b, 150c, and 150d. Detect. Detailed description thereof has been described above and thus will be omitted.

The controller 300 detects a failure of the first to fourth blowing fan motors 160a, 160b, 160c, and 160d through the first to fourth blowing fan motor failure detection sensors 190a, 190b, 190c, and 190d. . Detailed description thereof has been described above and thus will be omitted.

The controller 300 supplies a predetermined control signal to the blower fan driver 310 to control the rotational speed of the first to fourth blower fan motors 160a, 160b, 160c, and 160d to control the first to fourth indoor units. The discharge amount of the air discharged at (100a, 100b, 100c, 100d) is controlled.

The controller 300 supplies a predetermined control signal to the airflow controller 320 to control the first to fourth left and right airflow control drivers 170a, 170b, 170c, and 170d to control the first to fourth indoor units 100a and 100b. Control the left and right ejection direction of the air discharged from, 100c, 100d).

The controller 300 supplies a predetermined control signal to the airflow controller 320 to control the first to fourth upstream control driver 180a, 180b, 180c, 180d to control the first to fourth indoor units 100a and 100b. Control the up-and-down discharge direction of the air discharged from the air, 100c, 100d).

4 and 5 are flowcharts showing the control procedure of the multi-type air conditioner according to the present invention.

Referring to FIGS. 4 and 5, first, when a user applies power to the multi-type air conditioner 1 through the input unit 120, the multi-type air conditioner 1 according to the present invention is turned on ( S401).

In this case, the controller 300 determines whether the uniform airflow control method is selected by the user through the input unit 120 (S402).

At this time, if the user selects the uniform airflow control method, the control unit 300 determines whether the user sets an operation condition other than the airflow control method and inputs a start command through the input unit 120 (S416). At this time, if the user does not set an operation condition other than the airflow control method or inputs a start command through the input unit 120, the control unit 300 continuously operates the user other than the airflow control method through the input unit 120. The controller 300 determines the first to fourth indoor units 100a and 100b when the user sets an operation condition other than the airflow control method through the input unit 120 and inputs the start command. , 100c, 100d) controls to perform the operation by applying the uniform airflow control method (S417).

And the control unit 300 determines whether there is an equalizer air flow request indoor unit (S418). In detail, the controller 300 calculates a temperature average value through temperature information input from the first to fourth temperature sensors 140a, 140b, 140c, and 140d, and the first to fourth temperature sensors 140a, 140b, and 140c. It is determined whether there is a temperature sensor out of a range of the set maximum temperature difference among the first to fourth temperature sensors 140a, 140b, 140c, and 140d by subtracting each temperature information input from 140d to the calculated temperature average value. do. In other words, an indoor unit including a temperature sensor that is out of a set maximum temperature difference range among the first to fourth temperature sensors 140a, 140b, 140c, and 140d may mean an indoor unit requiring an equal airflow.

At this time, if there is no equal air flow request indoor unit, the control unit 300 determines whether the operation condition is the end of the uniform air flow control method applied (S421).

On the other hand, if there is an equalizer request indoor unit, the control unit 300 controls the equalizer so that the air discharged from the indoor unit other than the equalizer request indoor unit is discharged toward the area in charge of the equalizer request unit indoor unit (S419). For example, when it is determined that the second indoor unit 100b is a request for equal air flow, the controller 300 may determine that the air discharged from the first indoor unit 100a, the third indoor unit 100c, and the fourth indoor unit 100d is the second indoor unit. The control is performed such that the discharge portion 100b discharges toward the area in charge. That is, the first left and right airflow control member 152a controls the first left and right airflow control driving unit 170a to face the area in charge of the second indoor unit 100b, and the third airflow control member 152c and the fourth airflow. The control member 152d controls the third and fourth left / right airflow control driving units 170c and 170d to face toward the area in which the second indoor unit 100b is in charge. On the other hand, here, the indoor unit participating in the equalized air flow control has been proposed to participate in all indoor units other than the equalized air demand indoor unit, but is not limited thereto, and includes a method in which only indoor units installed at both sides of the equalized air demanding indoor unit participate. Let's find out.

Subsequently, the controller 300 determines whether it is an end condition of the uniform airflow control (S420). In other words, it is determined whether a predetermined time has elapsed.

Here, the controller 300 controls the uniform airflow control to be continuously performed unless the uniform airflow control end condition, and if the uniform airflow control end condition, the control unit 300 determines whether the operation end condition to which the uniform airflow control method is applied ( S421). At this time, if it is not the end condition for applying the equalized air flow control method, the control unit 300 returns to the step of performing the operation applied with the equalized air flow control method (S417), and if the end condition for applying the equalized air flow control method is the control unit 300. Ends the operation to which the equalized air flow control method is applied (S422), and determines whether the operation ends conditions of the first to fourth indoor units 100a, 100b, 100c, and 100d (S414), and the first to fourth indoor units 100a. If it is not the operation termination condition of 100b, 100c, and 100d, the flow returns to step S402 to determine whether the equal air flow control method is selected, and the operation termination condition of the first to fourth indoor units 100a, 100b, 100c, and 100d. If the power is applied to the first to fourth indoor units (100a, 100b, 100c, 100d) is turned off (S415) and ends.

On the other hand, if the uniform airflow control method is not selected in step S402 described above, the control unit 300 determines whether the user sets the airflow control method and other operation conditions and inputs a start command through the input unit (S403).

At this time, the controller 300 sets the air flow control method and other operation conditions through the input unit, and if the user does not input a start command, the user 300 continuously sets the air flow control method and other operation conditions through the input unit. If it is determined whether the start command is input (S403), and the user sets the airflow control method and other operation conditions through the input unit and inputs the start command, the controller 300 controls the first to fourth indoor units 100a and 100b, Control to perform the operation by applying the air flow control method set by (100c, 100d) (S405).

At this time, the control unit 300 is any one of the first to fourth indoor units (100a, 100b, 100c, 100d) of the compensation control for the defective temperature sensor and the fault blower fan motor and the up, down, left and right air flow control drive unit or Compensation airflow control is performed for all faulty indoor units.

In detail, it is determined whether there is a defective temperature sensor among the first to fourth temperature sensors 140a, 140b, 140c, and 140d (S407). In detail, it is determined whether or not the temperature sensor is broken by detecting whether the temperature information is output other than the rated temperature sensor.

Here, if there is a defective temperature sensor among the first to fourth temperature sensors 140a, 140b, 140c, and 140d, the controller 300 performs compensation control for the defective temperature sensor (S408). That is, the temperature of the defect temperature sensor calculates the average temperature of the temperature detected by the temperature sensor of the indoor unit located on both sides of the defect temperature sensor, based on the first to fourth indoor units (100a, 100b, 100c, 100d) Control them.

On the contrary, if none of the first to fourth temperature sensors 140a, 140b, 140c, and 140d has a defective temperature sensor, the controller 300 controls the first to fourth indoor units 100a, 100b, 100c, and 100d other than the temperature sensor. The blower fan motor and the up, down, left and right airflow control drive unit is determined whether the defect (S409).

That is, the control unit 300 uses the first to fourth upstream control driver failure detection sensors 130a, 130b, 130c, and 130d of the first to fourth upstream control control units 180a, 180b, 180c, and 180d. Determine if there is a defect. The first to fourth left and right air flow control unit failure detection sensors 150a, 150b, 150c, and 150d may determine whether the first to fourth left and right air flow control units 170a, 170b, 170c, and 170d are defective. The first to fourth blower fan motor failure detection sensors 190a, 190b, 190c, and 190d may determine whether the first to fourth blower fan motors 160a, 160b, 160c, and 160d are defective.

At this time, the control unit 300 is the first to fourth indoor units (100a, 100b, 100c, 100d), if there is a defect indoor unit of the blower fan motor other than the temperature sensor and one or all of the up and down / left and right air flow control drive unit In operation S412, it is determined whether the air flow control method and the compensation control method set by the operation end condition are applied. Here, the controller 300 is the first to fourth indoor units (100a, 100b, 100c, 100d) is not the end condition of applying the air flow control method set by the first to fourth indoor units (100a, 100b, 100c, 100d) The control to perform the operation by applying the set air flow control method (S405) is performed to the regression and subsequent steps. On the contrary, if the control unit 300 is an operation termination condition in which the set airflow control method and the compensation control method are applied, the control unit 300 ends the operation in which the set airflow control method and the compensation control method are applied (S413) and the first to fourth operations. Step S414 and subsequent steps are performed to determine whether the indoor unit 100a, 100b, 100c, or 100d is an operation termination condition.

On the contrary, if there is a defective indoor unit having any or all of the blower fan motors other than the temperature sensor and the up / down / left / right airflow control driving units, the control unit 300 performs compensation airflow control.

In detail, the operation of the defect chamber including the defective blower fan motor and the defect up / down / left / right airflow control drive unit is stopped, and the air discharged from the indoor unit other than the defective indoor unit is controlled to be discharged to the area in charge of the defective indoor unit. For example, when some or all of the second blowing fan motor 160b, the second left / right airflow control driver 170b, and the second upstream and downstream control driver 180b of the second indoor unit 100b have failed, the second indoor unit ( The operation of 100b) is stopped, and the air discharged from the first, third, and fourth indoor units 100a, 100c, and 100d is controlled to be discharged toward the area in which the second indoor unit 100b is in charge. Here, it turns out that the indoor unit participating in the compensation airflow control may be some or all of the indoor units other than the defective indoor unit.

Next, the control unit 300 determines whether the compensation airflow control termination condition is determined, that is, whether or not a predetermined time has elapsed (S411), and if it is not the compensation airflow control termination condition, continuously determines whether it is the compensation airflow control termination condition. If the compensation airflow control termination condition, the control unit 300 determines whether the first to fourth indoor units 100a, 100b, 100c, and 100d are the operation termination conditions to which the set airflow control method and compensation control are applied (S412); Perform the subsequent steps.

Meanwhile, the indoor unit requiring the compensation airflow control method is limited to an indoor unit in which a blower fan motor or up, down, left, and right airflow control units are broken, but the present invention is not limited thereto.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

According to the multi-type air conditioner according to the present invention as described above, when a failure occurs in any of the indoor units of the plurality of indoor units, there is an effect that the targeted cooling or heating is sufficiently performed even in a region in which the failed indoor unit is in charge.

In the room or room where a plurality of indoor units are installed, the indoor air circulation is not normally performed in a specific area, or when the indoor air is in a high or low temperature environment, the cooling or heating is also performed at the indoor unit that is responsible for cooling or heating a specific area. This effect is sufficiently achieved.

1 is a perspective view of an indoor unit of a multi-type air conditioner according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

3 is a block diagram showing a control system of the multi-type air conditioner according to the present invention.

4 and 5 are flowcharts showing the control procedure of the multi-type air conditioner according to the present invention.

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

100a, 100b, 100c, 100d: indoor unit

170a, 170b, 170c, 170d: Left and right airflow control drive

180a, 180b, 180c, 180d: upstream and downstream control drive section

Claims (8)

A plurality of indoor units including an air intake port, an air outlet port, and an airflow control member for controlling a direction of exhaust air discharged from the air outlet port; It is determined whether an equal air flow control method for controlling the air flow discharged from the plurality of indoor units by controlling the air flow control member so that the indoor temperature is uniform, and if the equal air flow control method is not selected, controls the air flow control member. The airflow discharged from the plurality of indoor units by controlling the airflow control member when a defective indoor unit is detected while adjusting the airflows discharged from the plurality of indoor units according to the airflow control method set by the user. Multi-type air conditioner including a control unit for performing a compensation air flow control method for compensating the area that the indoor unit is in charge. The method of claim 1, When the equalized airflow control method is selected, the control unit detects an indoor unit that is outside a predetermined range of the average value calculated by calculating a temperature average value of the air flowing into each of the plurality of indoor units as an equalized airflow request indoor unit, and discharges from the plurality of indoor units. And controlling the air to be discharged to an area in charge of the detected equalizer flow request indoor unit. delete The method of claim 1, The control unit detects the defective indoor unit having a defect using a failure detection sensor installed in the plurality of indoor units, The compensation airflow control method is characterized in that the air discharged from the plurality of indoor units is directed to the area in charge of the defective indoor unit and the operation of the defective indoor unit is stopped. Determining whether a uniform airflow control method for controlling the airflow discharged from the plurality of indoor units is selected so that the indoor temperature becomes uniform; Detecting a defective defective indoor unit having a failure of an electric equipment among the plurality of indoor units while adjusting the airflow discharged from the plurality of indoor units according to the air flow control scheme set by the user if the uniform air flow control method is not selected; And when the defective indoor unit is detected to be defective, causing the airflow discharged from the plurality of indoor units to be discharged to a region in charge of the defective indoor unit. The method of claim 5, wherein When the equalized airflow control method is selected, an equalized airflow demand indoor unit that is responsible for a region where the room temperature is different from the surrounding temperature is detected, and the air discharged from the plurality of indoor units is discharged to an area in charge of the equalized airflow demand indoor unit. Control method of a multi-type air conditioner, characterized in that. The method of claim 6, Detecting the equalizer request indoor unit, And calculating an average value of the air temperatures introduced into each of the plurality of indoor units, and detecting an indoor unit that is outside a predetermined range of the calculated average value as an equalizer requesting indoor unit. The method of claim 5, wherein And causing the airflow discharged from the plurality of indoor units to be discharged to an area in which the defective indoor unit is in charge comprises stopping the operation of the defective indoor unit.