KR20100000273A - Air conditioner and operating method for the same - Google Patents

Abstract

PURPOSE: An air conditioner and an operating method for the same are provided to controlling electricity consumption by setting the control sequence of the unit according to desirable temperature and the importance of rooms. CONSTITUTION: An air conditioner comprises multiple units(I,I1,I2,I3,I4,I5,I6,I7,I8,O) and a remote controller(RC). The remote controller monitors and controls the operation of the units. If a power control mode to control the electricity consumption is set, the remote controller decides priority order of control on the multiple units according to the desirable temperature and the importance of rooms. The remote controller sets a control target according to a preset operation rate, and controls the control targets according to the priority order of control.

Description

Air conditioner and operating method for it {Air conditioner and operating method for the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner and a method of operating the same, and in particular, an amount of power consumed by an air conditioner or an electric device including an air conditioner is first determined by selecting a controlled unit or an order in which units are controlled. It relates to an air conditioner and a method of operating the same.

An air conditioner is a facility installed to purify indoor air to create a more comfortable indoor environment. The air conditioner discharges cold air into the room to regulate the room temperature. The air conditioner includes an indoor unit which is configured as a heat exchanger and installed indoors, and an outdoor unit which is configured as a compressor and a heat exchanger and supplies refrigerant to the indoor unit.

The air conditioner is equipped with a remote controller for efficient control of the indoor unit and the outdoor unit, and the remote controller enables the user to monitor and control a plurality of outdoor units and indoor units at a specific place without having to move to the place where each indoor unit and outdoor unit are installed. .

Recently, as interest in power consumption has increased, the need for effective power consumption control in summer or winter when power consumption is high, by connecting a demand controller to the air conditioner, depending on the power consumption of the air conditioner or The power consumption is controlled by variably controlling the operation settings.

However, in the case of controlling the amount of power consumed, the unit is controlled in any order or in a specified order to the unit whose operation is controlled first, but the unit in the important room where the room temperature must maintain a constant temperature is controlled first. The operation is stopped or the unit is stopped in a state where the user does not feel comfortable because the difference between the desired temperature and the indoor temperature is large, thereby reducing the user's convenience and comfort.

In addition, when the amount of power consumption does not fall below a certain level, there is a problem that the user's discomfort is amplified when the operation stop state as described above is maintained.

An object of the present invention is to control the operation of an air conditioner according to the amount of power consumed, when the power consumption exceeds a certain level and requires control of the unit, the order in which the units are controlled, the importance of the room in which the unit is installed, The present invention provides an air conditioner and a method of operating the same, which minimize the user's discomfort while controlling the amount of power consumed by selecting the temperature according to the temperature difference between the temperature and the room temperature.

The air conditioner according to the present invention includes a plurality of units, a remote controller for monitoring and controlling the operation of the unit, wherein the remote controller is important for the room in which each unit is installed when setting a power control mode for controlling the power consumption. And determining a control order for the plurality of units in response to a temperature difference between a desired temperature and an indoor temperature, selecting a control target according to a set operation rate, and controlling the operation of the control target according to the control sequence. It is done.

In addition, the operation method of the air conditioner according to the present invention includes comparing the power consumption amount and the set value, when the power consumption amount reaches the set value, the temperature difference between the room temperature and the set temperature received from a plurality of units, and Determining a control order for the plurality of units by using the importance of a room in which a plurality of units are installed, and selecting and controlling a control target based on the control order according to the set operation rate.

In the air conditioner and its operation method according to the present invention configured as described above, in order to control the amount of power consumed, first, by controlling the unit by selecting the control unit or control order of the unit according to the importance and temperature difference of the room, Even if it is low, the unit of the room with small temperature difference is controlled first, and the room with high temperature or high temperature difference that need to maintain a certain temperature can be controlled later, so that the user's discomfort can be minimized while controlling the power consumption so that the control efficiency is improved. It is improved, and there is an effect of cost reduction by controlling power consumption.

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

1 is a configuration diagram showing the configuration of an air conditioner according to an embodiment of the present invention.

Referring to FIG. 1, an air conditioner according to the present invention monitors an operation state of at least one unit, such as an outdoor unit O and an indoor unit I, and a first remote controller RC for controlling the operation thereof. Include. In addition, the air conditioner includes a local controller (R7) connected to each indoor unit (I) to input a control command to the indoor unit (I), and output the operating state of the indoor unit (I).

In addition, the air conditioner is connected to the first remote controller (RC) to transmit and receive data to monitor the outdoor unit (O) and the indoor unit (I) connected to the first remote controller (RC), the control command for operation control the first It may further include a second remote controller (RC2) for transmitting to the remote controller (RC). At this time, the second remote controller RC2 is connected to the first remote controller RC within a predetermined distance or through a predetermined network such as the Internet.

Here, the air conditioner may further include a unit such as an indoor unit (I), an outdoor unit (O), an air cleaning unit, a ventilation unit, a humidification unit, a dehumidification unit, a heater, and the unit may include a remote controller (RC). It can be connected and integrated control. Hereinafter, the indoor unit (I) and the outdoor unit (O) will be described as an example, but may also be applied to the case where the above units are connected. At this time, the number of the outdoor unit and the indoor unit is not limited to the drawing.

The first remote controller RC is connected to the first outdoor unit O1 and the second outdoor unit O2, and the first outdoor unit O is connected to the first to fourth indoor units I1 to I4. In addition, the second outdoor unit O2 is connected to the fifth to eighth indoor units I5 to I8. In this case, although the local controllers may be connected to the first to sixth indoor units I1 to I6, respectively, the seventh local controller R7 is connected to the seventh indoor unit I7.

The outdoor unit (O) selects a compressor for receiving and compressing a refrigerant, an outdoor heat exchanger for exchanging refrigerant and outdoor air, an accumulator for extracting gas refrigerant from the supplied refrigerant, and supplying the refrigerant to the compressor, and a refrigerant flow path for heating operation. It includes a four-way valve. In addition, a high pressure pressure sensor for measuring the pressure of the refrigerant discharged from the compressor and a low pressure pressure sensor for measuring the pressure of the refrigerant supplied to the compressor. In addition, a plurality of sensors, valves and oil recovery device, etc. are further included, but the description of the other components will be omitted below.

The indoor unit (I) includes an indoor heat exchanger, an indoor fan, an expansion valve for expanding the refrigerant supplied from the outdoor unit (O), and a plurality of sensors.

At least one indoor unit (I) may be provided in one room, and the one or more outdoor units (O) are driven by a request of at least one of the plurality of indoor units (I), and correspond to the driven indoor unit (I). As the heating capacity is variable, the number of operations of the outdoor unit O and the number of operations of the compressor installed in the outdoor unit O are variable. Here, the number of outdoor units may vary depending on the air conditioning capacity and the capacity of the compressor provided according to the number of vacancy.

The outdoor unit O and the indoor unit I are connected through a refrigerant pipe to perform cooling or heating operation according to the flow of the refrigerant according to the flow of the refrigerant between the outdoor unit O and the indoor unit I, and predetermined communication Send and receive data with each other according to the method.

The first remote controller RC is connected to the indoor unit I and the outdoor unit O, and transmits and receives data according to a predetermined communication method, thereby monitoring the operation of the indoor unit I and the outdoor unit O and inputting a user command. In response to the control command is generated and transmitted to the indoor unit and the outdoor unit to control the indoor unit and the outdoor unit to perform a predetermined operation. Here, the first remote controller RC has a converter or a gateway for converting data of different protocols.

The first remote controller RC controls the plurality of indoor units I1 to I8 in units of individual indoor units or divides at least one indoor unit into a predetermined group or zone and controls operations in group units and zone units. At this time, the first remote controller (RC) is controlled in units of individual indoor units, groups, or zones, and controlled to operate according to a predetermined schedule, so that the indoor units included in the group or zone are operated with the same settings according to the same schedule. do. At this time, the remote controller (RC) can be divided into groups or zones according to the connection relationship between the indoor unit and the outdoor unit or the installation position of the indoor unit, irrespective of the installation position or the outdoor unit connection relationship, at least one indoor unit operates according to the same schedule Groups may be formed as possible.

The local controller R is connected to the indoor unit, displays the operation state of the connected indoor unit, and transmits a control command corresponding to the input data to the indoor unit. At this time, the local controller (R) may be connected to the indoor unit by wire or wirelessly, one-way or two-way communication is possible according to the communication method. The local controller R may be connected to one indoor unit, or may be connected to a plurality of indoor units, and a plurality of local controllers may be connected to one indoor unit. When the local controller R is connected to a plurality of indoor units, an operation state of any one indoor unit of the plurality of indoor units is displayed, and the same control command is transmitted to another connected indoor unit.

2 is a block diagram showing the configuration according to the demand control of the air conditioner.

As shown in FIG. 2, an air conditioner is located in a predetermined building or a predetermined area and is operated by an electric power source, for example, an electric device such as a light, an elevator, or a home appliance of a building in which an air conditioner is installed. It further comprises a demand controller (DC) for measuring the amount of power consumed by the generated and generates a demand control command.

In this case, in addition to the demand controller DC, a power meter may be connected.

The demand controller (DC) is connected to the substation chamber (PS) for supplying power to an electric device including an air conditioner, to measure the amount of power consumed, and is connected to the first remote controller (RC).

The first remote controller RC controls the outdoor unit O and the indoor unit I to operate at a predetermined operation rate in response to the amount of power input from the demand controller DC or the demand control command. In addition, the first remote controller RC may receive the amount of power from the power meter.

Here, the first remote controller (RC) receives the demand control command from the demand controller (DC), as described above, the demand control mode for controlling the indoor unit (I) or outdoor unit (O), demand controller (DC) or Based on the amount of power input through a separate power meter (not shown), one of the peak power control mode for controlling the indoor unit I or the outdoor unit O is set to control the amount of power consumed.

The demand control mode is to control the operation of the air conditioner according to the control command of the demand controller (DC) based on the amount of power consumed by all electric devices including the air conditioner in a building or a specific area. The operation of the air conditioner is controlled so that the amount of power does not reach a predetermined reference value, or the air conditioner is operated to operate at a specified operation rate regardless of the amount of power. Here, in the demand control mode or the power control mode, the desired power as the target amount of power and the desired driving rate as the target operation rate may be arbitrarily set according to the influence of the air conditioner on the total power consumption, the amount of power available, and the like.

In response to the control command of the demand controller DC, the first remote controller RC controls the operation rate or varies the set temperature of the indoor unit to reduce the amount of power consumed. In addition, when the amount of power input from the demand controller DC is greater than or equal to a preset reference value, the first remote controller RC controls the indoor units and the outdoor units to reduce the amount of power consumed. In this case, the operation rate of the air conditioner may be controlled through any one of the demand controller DC or the first remote controller RC.

The first remote controller RC may control the operation by group and zone and also by the indoor unit during demand control or power control. The first remote controller RC may control the operation by the indoor unit. By setting, the operation is controlled in order.

In this case, the first remote controller RC controls the priority according to priority considering both the importance of the room where the indoor unit is installed and the temperature difference between the present temperature of the room where the indoor unit is installed and the set desired temperature. Determine the order of control. In addition, the control target is selected according to the set operation rate with respect to the above control procedure. High priority may be given to indoor units installed in rooms of high importance, and high priority may also be given to indoor units installed in rooms with high temperature differences.

3 is a block diagram showing the configuration of a remote controller of an air conditioner according to an embodiment of the present invention.

As shown in FIG. 3, the first remote controller RC controls overall operations of the input unit 120, the output unit 130, the data unit 140, the communication unit 150, and the first remote controller RC. It includes a control unit 110. Here, the second remote controller RC2 may also be configured similarly or identically to the configuration of the first remote controller RC, and a description thereof will be omitted below.

The input unit 120 includes at least one input means such as a switch or a button to apply the input data to the controller 110. In this case, the input unit 120 may also include a touch pad and a touch input means through a touch screen. In this case, the first remote controller RC may not include a separate input unit in some cases. In this case, a user command is input or an operation state is output by an external connection through the communication unit 150 or a second remote controller. May be

The output unit 130 outputs an operation state of a unit such as a control screen for controlling a plurality of units, a control menu, an outdoor unit O, and an indoor unit I to the screen. In addition, the output unit 130 outputs data transmitted and received through the communication unit 150.

In addition to the display screen, the output unit 130 may include a lamp for displaying an operation state of the first remote controller RC through lighting, blinking, and color of light, a predetermined warning sound, an effect sound, and a voice guide. It may further include.

The data unit 140 includes the importance data 141 stored in the importance of the room in which the unit is installed, the temperature data 142 received from each unit, control commands for controlling the units such as the outdoor unit and the indoor unit, unit information, and the like. Unit control data 143 is included.

In addition, the data unit 140 includes operation data for driving the first remote controller RC and data for screen output. In addition, state information data of a unit such as an outdoor unit and an indoor unit received through the communication unit 150 is stored, and control command data received through the communication unit 150 from the second remote controller RC2 is stored.

The communication unit 150 includes at least one communication module to receive operation state data from the outdoor unit O and the indoor unit I according to the first communication method, and from the input unit 120 or the second remote controller RC2. Send the received control command. In addition, according to the second communication method, data of the outdoor unit O and the indoor unit I is transmitted to the second remote controller RC2, and control command data is received from the second remote controller RC2. At this time, the first remote controller (RC) is preferably used by differently setting the first communication method and the second communication method of the communication unit 150, it may be the same in some cases. In this case, the apparatus may further include a converter configured to convert data or a protocol for data transmission between the first communication method and the second communication method.

The control unit 110 controls not only a plurality of indoor units in units of individual indoor units, but also sets a group including at least one indoor unit, or a zone including at least one group, and sets the units in units of individual indoor units, groups, or zones. Control the operation and set the schedule. The controller 110 may adjust the operation rate in response to the amount of power consumed in the power control mode, set the desired operation rate, and control the unit to operate within the desired operation rate range.

The control unit 110 controls the operation of the indoor unit according to a control command or power consumption received from the demand controller DC through the communication unit 150. In this case, the controller 110 adjusts the amount of power consumption through the operation rate control when a command for reducing the operation rate is input from the demand controller DC or when the input power consumption reaches or exceeds the reference value.

In this case, when controlling the unit in a power control mode such as demand control or peak power control, the control unit 110 considers the importance of the room for each unit and the temperature difference between the room temperature and the set desired temperature. The control order is determined by calculating the priority. In addition, the unit is controlled according to the set operation rate, and the unit which is out of the range of the operation rate according to the control procedure is selected to be controlled and controlled to stop operation. In this case, the unit included in the control target is preferably stopped, but may be operated in a blowing mode or a power saving mode without stopping in some cases.

At this time, the place where the importance of a room is high has a high priority, and even if a temperature difference is large, it has high priority. The control unit 110 determines the control order by summing the priority according to the importance of the room and the priority for the temperature difference according to a predetermined ratio. In this case, the addition ratio may vary according to the weight setting.

In other words, if the room temperature of a certain room needs to maintain a certain temperature, the weighting of the room's importance can be increased, and if the comfort of the occupants is more important than the room's importance, the weighting ratio can be adjusted by giving a greater weight to the temperature difference. have.

For example, the first remote controller RC weights the importance of the room to 7, the temperature difference to 3, calculates the priority for each indoor unit, and sets the control order accordingly. Accordingly, the control unit 110 determines the control order by multiplying the priority for the importance of the room by 7 and multiplying the priority for the temperature difference by 3 and summing at a ratio of 7: 3.

For example, while the first to eighth indoor units I1 to I8 are operated in the cooling mode at 100% operation rate, a command for reducing the operation rate 25% is received from the demand controller DC, or the demand controller When the power consumption input from the DC reaches the reference value, the air conditioner is operated at an operation rate of 75%. At this time, the control sequence is sequentially stopped from the unit with low control sequence, and the control sequence is controlled to the 75% operating rate range.

In addition, even when the unit is controlled in accordance with the desired driving rate, only the units included in the desired driving rate range maintain the operation in accordance with the control procedure, and the unit which is out of the desired driving rate range is stopped.

That is, when the control order is determined in order of the first indoor unit, the third controller, the fifth controller, and the lower priority among the first to eighth indoor units I1 to I8, when the driving sequence is operated at the 75% operation rate as described above, The first indoor unit and the third indoor unit are selected to be controlled and are stopped.

However, when a predetermined time has elapsed while the first indoor unit I1 is stopped, the control unit 110 causes the other indoor unit to stop operating according to the control sequence, and the first indoor unit is restarted to operate one indoor unit. Do not stop operation for a long time. At this time, the operation switching period is set to periodically change the operation state.

After the control unit 110 stops the operation of the control object as described above, when the amount of power is greater than the demand reference value, the control unit 110 determines the control order again, resets the operation rate, newly selects the control object, and operates the new control object. Let it stop.

In this case, after controlling the first control target, the controller 110 may determine a new control order among the operating units and additionally select and control the second control target. In addition, the control unit 110 may re-determine the control order for all units that are in operation or stopped, and may select and control a new third control object according to the changed operation rate.

Referring to Table 1 below, the control order determination and control object selection will be described as an example.

First indoor unit 2nd indoor unit 3rd indoor unit 4th indoor unit 5th bet 6th indoor unit 7th indoor unit 8th indoor unit Room importance One 2 3 10 4 5 7 One Desired temperature 23 24 22 22 20 22 21 22 Room temperature 24 25 25 23 25 23 24 26 Temperature difference One 2 3 One 5 3 One 4 Room importance: temperature difference 7: 3 Summing 7 + 3 = 10 14 + 3 = 20 21 + 9 = 30 70 + 3 = 73 28 + 15 = 43 35 + 9 = 44 49 + 3 = 52 7 + 12 = 21 Control sequence One 2 4 8 5 6 7 3 Room importance: temperature difference 5: 5 Summing 10 20 30 55 45 40 40 25 One 2 4 8 7 5 5 (6) 3

In this case, the weight 7 is set for the importance of the room, the weight 3 is set for the temperature difference, and the weight 5 is set for the importance of the room, and the weight is set to 5 as an example.

As shown in Table 1, in the case of weighting at 7: 3, the first indoor room (I1) has a priority of 1, a temperature difference of 1, and a total of 10 weighted weights. The second indoor unit I2 has a control order of 2, with importance 2, temperature difference 1, and total 17 of the rooms. Here, the eighth indoor unit I8 has a room importance of 1, but the temperature difference is 4, so that the total is 21 and the control rank 3 is. Here, although the eighth indoor unit I8 has a lower importance of the room than the second indoor unit I2, it has a higher control order than the second indoor unit I2 according to the temperature difference.

When the control order is determined as described above and the operation rate is 75%, the controller 110 causes the first and second indoor units I1 and I2 to be selected as the control target according to the control order to stop the operation. When the set operation rate is 50%, the first, second, third and eight indoor units I1, I2, I3, and I8 are selected as the control target and the operation is stopped.

On the other hand, when the weight is set to 5: 5, the control order of the fifth, sixth and seventh indoor units I5, I6, and I7 is changed as compared with the weight being set to 7: 3.

Here, the same control sequence is set for the sixth indoor unit I6 and the seventh indoor unit I7, but in some cases, the sixth indoor unit I6 controls the order of importance of the room 5 and the seventh indoor unit I7. Is set to the control sequence 6, or the sixth indoor unit I6 may be determined to be the control sequence 6 and the seventh indoor unit I7 to the control sequence 5 in preference to the temperature difference.

Therefore, rather than simply giving priority to the unit and controlling it, the control order is determined in various ways according to the state of each room and the state of the unit by applying a complex consideration by applying the importance of the room, the temperature difference, and the weight. At the same time it is possible to provide comfort.

Looking at the operation according to an embodiment of the present invention configured as described above are as follows.

4 is a flowchart illustrating a control method and a control method according to a control procedure for controlling power consumption of an air conditioner according to an embodiment of the present invention.

Referring to FIG. 4, the remote controller RC performs power control such as demand control or peak power control on a plurality of units to control. The remote controller RC receives operation state data from a plurality of units, displays the data on the screen, and stores the same. The operation state data includes information on the room temperature, the set desired temperature, the operation mode, the air volume, and the wind direction of the room where the unit is installed.

The remote controller RC compares the amount of power consumption input from the demand controller DC or the power meter with a set value. When the input power consumption reaches the set value, the importance data set in the plurality of units is called, and the temperature difference between the room temperature and the desired temperature is calculated from the operation state data received from the plurality of units (S330).

The remote controller RC applies a weight set to the importance of the room where the unit is installed and the temperature difference to determine the control order (S340). The remote controller RC selects a unit to be controlled out of the range of the operation rate according to the set operation rate using the control procedure determined as described above (S350).

For example, of the first to eighth indoor units I1 to I8 having an operation rate of 50%, four indoor units having low control order are selected as the control object. Referring to Table 1, the 1,2,3,8 indoor units (I1, I2, I3, I8) are selected as the control targets at a weight of 5: 5 and an operation rate of 50%.

The remote controller RC controls the operation of the unit included in the selected control target (S360). Accordingly, the unit under control is stopped. In this case, the unit included in the control target is preferably stopped. However, in some cases, the unit may be switched to the blowing mode or may be operated in a power saving mode.

On the other hand, after controlling the unit selected as the control target as described above, the remote controller RC determines the control sequence again after resetting the operation rate when the amount of power used exceeds the set value even after a predetermined time elapses, and resets the operation target. Select again and control (S330 to S360).

After controlling the unit selected as the control target as described above, the remote controller RC controls the unit to be controlled to operate normally when the amount of used power decreases below the set value after a predetermined time. At this time, the higher-order units are given priority according to the control sequence and are sequentially driven again.

5 is a flowchart illustrating a unit control method according to a change in power consumption of an air conditioner according to an embodiment of the present invention.

Referring to FIG. 5, as shown in FIG. 4, the remote controller RC is in power control (S410), when the amount of power used is greater than or equal to the first set value (S420), taking into account the importance, temperature difference, and weight of the room. The control sequence is determined, and accordingly, the control target is selected (S430), and the unit included in the control target is controlled to stop operation (S440).

After controlling the unit as described above, after a predetermined time elapses, it is determined whether the amount of power consumption is equal to or greater than the first predetermined value (S450).

If the amount of power used is less than the first set value, it is determined whether the amount of use messenger is greater than or equal to the second set value (S460). It maintains, but reselects the control target, so that the new control target is stopped (S430, S440). Here, the operation switching period is to re-drive the unit is stopped when the operation switching period is reached, so that a predetermined unit of the operating unit is stopped, so that the operation stop state is not maintained for a predetermined time or more. However, when the control order is determined again, since the temperature difference varies with time, the control order is also changed. In some cases, the unit included in the control object may be included in the next control object.

If the residual amount of use is less than the second set value, the control target unit is restarted to control normal operation (S510). At this time, the remote controller RC causes the units included in the control target to be sequentially driven in ascending order of control, and when the power consumption reaches the first set value while the unit to be controlled is driven again, the control target Select again to stop the unit from operating.

On the other hand, even after the control target is stopped as described above, if the amount of power used exceeds the first set value, the remote controller RC re-determines the control order for the operating unit to further select the control target (S480). . For convenience, the first control target selected as the first control target and the second selected control target are referred to as the second control target.

The remote controller RC controls the unit included in the secondary control target to be further stopped in operation in the state in which the unit included in the primary control target is stopped (S490).

After the unit is controlled as described above, if the amount of power used is less than the second set value, the unit to be controlled is operated normally (S510).

In addition, when the amount of power used is greater than or equal to the second set value and less than the first set value, the operation state is switched according to the operation switching cycle (S450 to S470, S430 to S440).

As described above, the air conditioner and its operation method according to the present invention have been described with reference to the illustrated drawings. However, the present invention is not limited by the embodiments and drawings disclosed in the present specification, and it is applied within the scope of the technical idea. Can be.

1 is a block diagram showing the configuration of an air conditioner according to an embodiment of the present invention,

2 is a block diagram showing the configuration according to the demand control of the air conditioner according to an embodiment of the present invention,

3 is a block diagram showing the configuration of a remote controller of an air conditioner according to an embodiment of the present invention;

4 is a flowchart illustrating a control method according to a control target and a control procedure for controlling power consumption of an air conditioner according to an embodiment of the present invention;

5 is a flowchart illustrating a unit control method according to a change in power consumption of an air conditioner according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

RC: remote controller 110: control unit

120: input unit 130: output unit

140: data unit 150: communication unit

DC: demand controller

I, I1 to I8: Indoor unit O: Outdoor unit

PS: substation

Claims (12)

A plurality of units; And A remote controller for monitoring and controlling the operation of the unit, The remote controller determines the control order for the plurality of units according to the importance of the room in which each unit is installed and the temperature difference between the desired temperature and the indoor temperature when setting the power control mode for controlling the power consumption. Selecting a control target according to the control, and controlling the operation of the control target according to the control sequence. The method of claim 1, The remote controller weights the importance and the temperature difference of the room, and adds the weight and the temperature difference to the room considering the weight to determine the control order. The method of claim 2, And the remote controller selects a unit out of a set operation rate as the control target and controls its operation in response to a control procedure set in the plurality of units. The method of claim 2, And the remote controller re-determines the control order for the plurality of units in response to the elapsed time or the amount of power consumption measured, and resets the control target according to the operation rate. The method of claim 4, wherein After the remote controller controls the operation of the unit included in the control target, If the power consumption exceeds the reference value, the control order is again determined for the unit that is normally operated among the plurality of units. An air conditioner that resets the operation rate and selects and controls additional control objects. The method of claim 4, wherein After the remote controller controls the operation of the unit included in the control target, and after a predetermined time elapses, the remote controller re-determines the control order for the plurality of units, and re-selects and controls the control target according to the operation rate. Harmonizer. The method of claim 1, A power meter connected to the remote controller and configured to measure an amount of power consumed by an electric device included in a building or an area in which the plurality of units are installed, and a demand controller to transmit a demand control command to the remote controller in response to the amount of power; Air conditioner comprising any one more. Comparing the power consumption with a set value; When the amount of power consumption reaches a set value, determining a control order for the plurality of units using a temperature difference between the room temperature and the set temperature received from the plurality of units and the importance of the room in which the plurality of units are installed; ; And And selecting and controlling a control target based on the control sequence according to a set operation rate. The method of claim 8, And re-selecting the control target by re-determining the control order for the plurality of units when the amount of power consumption measured again after a predetermined time elapses after the control target is controlled. Way. The method of claim 8, After the control target control, when the amount of power consumption measured again after a predetermined time elapses is greater than or equal to the set value, the control order for the operating unit among the plurality of units is determined again, The operation method of the air conditioner further comprises the step of changing the operation rate to further select and control the control target. The method of claim 8, If the amount of power consumption measured after a predetermined time elapses after the control target control is less than the set value, And re-driven the units included in the control object sequentially in the order of high control order. The method according to any one of claims 9 to 11, The control target is an operation method of the air conditioner is controlled to be operated by any one of operation stop, blowing mode switching and power saving mode switching.

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