JP6115384B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to control of an air conditioner that limits current consumption during on-timer operation.

  Conventionally, an air conditioner having an on-timer operation function has a configuration shown in the block diagram of FIG. This air conditioner has a configuration in which an indoor unit 100 and an outdoor unit 2 are connected by a communication line 3. The control unit 101 of the indoor unit 100 receives a room temperature value from the room temperature input unit 102, and the control unit 101 instructs the outdoor unit 2 to operate so that the room temperature value becomes equal to a set temperature value set by a remote controller (not shown). Data is transmitted and air-conditioning operation is executed.

  Further, the indoor unit 100 is provided with an on-timer instructing unit 103, and performs a pre-operation for starting the air conditioner in advance so that the room temperature and the set temperature become equal at the on-timer time input from the remote controller. It is supposed to be.

  FIG. 8 is a block diagram showing the details of the on-timer instruction means 103, and includes on-timer time input means 104, operation start time calculation means 105, and timer means 106. The on-timer time input unit 104 outputs the on-timer time value to the operation start time calculation unit 105 when the on-timer time value is input by a remote control operation by the user. The operation start time calculation means 105 calculates the pre-operation start time by back-calculating the time so that the pre-operation is completed at the on-timer time, and outputs it to the timer means 106. Then, the timer means 106 measures the time and outputs an operation start instruction to the control means 101 when the preliminary operation start time is reached.

  The control means 101 to which this operation start instruction is input starts the air-conditioning operation so that the value of the target temperature storage means 104 in which the set temperature set by the remote controller is stored is the same as the room temperature (for example, (See Patent Document 1).

  By the way, in recent years, energy saving has been carried out in the home so as to suppress the increase in power demand, and in response to this, the number of homes that lower the breaker capacity (contract ampere) has increased. The problem here is a breaker trip (breaker breaking operation due to an overcurrent, etc.) that occurs at the peak of the power used.

  One of the peaks of power consumption in ordinary households is the period from getting up to going out (going to work, going to school, etc.). During this period, especially during the winter morning when the outside air temperature is falling, the heating operation of the air conditioner and the use of electrical products overlap, and breaker trips are likely to occur. For example, in addition to the use of an air conditioner, a breaker trip is likely to occur when devices with relatively large current consumption, such as rice cookers, microwave ovens, electric pots, electromagnetic cookers, dryers, and toasters, are used at the same time.

  As an apparatus for avoiding such a breaker trip in the home, an air conditioner shown in Patent Document 2 has been proposed. This air conditioner changes the current limit value that limits the current consumption of the air conditioner according to a predetermined schedule. For example, the current limit value is set to 6 amps from 7: 00 to 7:30 in the morning, and the current limit value is set to 10 amps from 7:30 to 8:00. The current consumption of the air conditioner is limited in accordance with the current consumption of the electrical product to be performed.

  However, there is no problem if you use electrical appliances according to the schedule.For example, depending on the breakfast menu, the use schedule of the microwave oven may be changed, or if you use a microwave for a meal that you forgot to heat outside the period set in the schedule It didn't always warm up or go on schedule every day. In such a case, the current that can be used in the electric equipment other than the air conditioner is reduced from the planned value, and a breaker trip may occur.

Japanese Patent Laid-Open No. 10-61995 (page 3-4, FIG. 3) JP 2012-72968 A (page 10-11, FIG. 7)

  Provided is an air conditioner that prevents a breaker trip by avoiding an air-conditioning operation that consumes a large amount of current during a time period after an on-timer time, and that does not make the user feel uncomfortable with respect to the air-conditioning temperature.

In order to solve the above-described problems, the invention according to claim 1 of the present invention stores in advance a set temperature, an on-timer time, and a management period that is a period following the on-timer time. An air conditioner that performs a preliminary operation for air conditioning so that the room temperature becomes a target temperature based on the set temperature by the on-timer time,
The air conditioner executes the preliminary operation by setting the target temperature higher than the set temperature if the preliminary operation is a heating operation, and lowering the target temperature below the set temperature if the preliminary operation is a cooling operation. In the management period, a current limiting operation is performed in which operation is performed at a predetermined current or less.

Further, the air conditioner includes a current limit on-timer instruction means for outputting the target temperature and the current limit operation instruction to the control unit,
In the current limit on-timer instruction means, a room temperature change table in which a room temperature change value that is a change in room temperature and the room temperature in the management period is experimentally obtained in advance, or the length of the management period and the management period An arithmetic expression for obtaining a room temperature change value that is a change in room temperature is stored,
The current limit on-timer instruction means obtains a room temperature change value in the management period from the room temperature change table or the arithmetic expression using the length of the management period, and corrects the set temperature with the room temperature change value. A value of a target temperature is output to the control means, and the preliminary operation is executed.

  By using the above means, according to the air conditioner of the present invention, in order to execute the preliminary operation at a temperature higher than the set temperature in the case of the heating operation, and lower than the set temperature in the case of the cooling operation, Even if the air-conditioning operation in which the current is limited during the management period is performed, the user's discomfort can be reduced because the difference between the room temperature and the set temperature is smaller than when the preliminary operation is performed using the set temperature.

It is a block diagram which shows the hardware constitutions of the air conditioner by this invention. It is a block diagram which shows the function of the air conditioner by this invention. It is a graph which shows the fall characteristic and rise characteristic of room temperature. It is explanatory drawing of the temperature change table which stored the temperature change of room temperature. It is explanatory drawing explaining the principle of operation of this invention. It is a flowchart which shows operation | movement of a prior operation control means. It is a block diagram which shows the function of the conventional air conditioner. It is a block diagram which shows the conventional on-timer instruction | indication means.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

FIG. 1 is a block diagram showing a hardware configuration of an air conditioner according to the present invention.
The air conditioner includes a remote controller 6 that receives a user operation and transmits the received operation as instruction data, an indoor unit 1, and an outdoor unit 2. The indoor unit 1 and the outdoor unit 2 are The communication line 3 is connected. The indoor unit 1 stores a room temperature detection unit 4 that detects the room temperature in the room, a storage unit 5 that stores an instructed set temperature, air volume, wind direction, operation mode, and the like, and stores the instruction data in the storage unit 5. In order to perform the air conditioning operation so that the room temperature detected by the room temperature detection unit 4 approaches the set temperature in the instruction data, a control unit 8 that transmits the operation instruction data to the outdoor unit 2 and a timer 7 that measures the time are provided. ing.

FIG. 2 is a block diagram showing functions of the air conditioner according to the present invention. Each means described in FIG. 2 is realized by using the hardware function of FIG. 1 described as an example.
This air conditioner converts the temperature signal from the control unit 11 for executing the air conditioning operation according to the target temperature stored in the target temperature storage unit 14 provided therein and the room temperature detection unit 4 into a room temperature value and outputs the room temperature value. The room temperature input means 102 and the current limit on-timer instruction means 20 for instructing the control means 11 to perform a current-limited operation in which the consumption current of the air conditioner is operated at a predetermined current or less for a predetermined period after completion of the pre-operation by the on-timer function. And. The control means 11 sets the set temperature value and the operation mode input from the remote controller 6, the outside air temperature value input from the outdoor unit 2, and the room temperature value input from the room temperature input means 102. Each is output to the current limit on-timer instruction means 20.

  On the other hand, the current limit on-timer instruction means 20 outputs an operation instruction such as start / stop / air blowing of the air-conditioning operation and a target temperature value of the room temperature to the control means 11, and sets the operation mode, the outside air temperature value, and the room temperature value On-timer operation control means 21 to which a temperature value is input, timer means 22 for measuring time, a room temperature change table 23 for storing a room temperature change value at which the room temperature changes after air conditioning is stopped, and a user operation The management period input means 25 that stores the management period that is input and is a current consumption limiting period of a certain period from the on-timer time in the storage unit 5, and stores the on-timer time that is input by the user's operation in the storage unit 5 On-timer time input means 24 is provided.

Next, the hardware configuration of FIG. 1 will be described in comparison with the configuration of the means of FIG.
The control means 11, the on-timer operation control means 21, the corrected target temperature calculation means 26, and the room temperature change table 23 in FIG. 2 are realized by the control section 8 of FIG. 1, and the room temperature input means 102 is the control section 8. The timer unit 25 is realized by the timer 7 and the control unit 8, the target temperature storage unit 14 is realized by the storage unit 5, the on-timer time input unit 24, the management period input unit 25, and the like. Is realized by a remote control 6.
The configuration in FIG. 1 is an example, and each unit in FIG. 2 is not necessarily limited to the configuration in FIG. For example, the room temperature input means 102 may be realized by the remote controller 6 including a temperature sensor (not shown).

  In the present embodiment, the cooling / heating operation for setting the room temperature to the target temperature at the on-timer time is referred to as pre-operation. For this reason, in the air conditioner according to the present invention, the pre-operation is started according to the operation mode and the target temperature designated from the time before the on-timer time according to the instruction of the current limit on-timer instruction means 20. In this embodiment, the target room temperature designated by the user is referred to as a set temperature, and the target room temperature determined in the air conditioner based on this is referred to as a target temperature.

FIG. 5 is an explanatory diagram at the time of heating operation for explaining the operation principle of the present invention. In FIG. 5, the vertical axis represents room temperature and the horizontal axis represents time. Further, t0 to t4 indicate times. Note that the operation mode (heating operation mode in this embodiment), the set temperature (20 ° C.), and the like are already set and stored in the storage unit 5 via the remote controller 6.
In the air conditioner according to the present invention, in the on-timer operation, the current-limiting operation of the air conditioner is performed during the management period from time t3 to time t4. When the management period (time t3 to time t4) is input by the management period input unit 25, the current limit on timer instruction unit 20 performs the heating operation in the preliminary operation period from time t2 to time t3. Start control.

  The on-timer operation control means 21 in the current limit on-timer instruction means 20 calculates a judgment time t1 that is a predetermined time before the on-timer time t3, here one hour before, and sets this time in the timer means 22. stand by. The timer means 22 outputs this time to the on-timer operation control means 21 when the judgment time t1 is reached. When this time is input, the on-timer operation control means 21 calculates a target temperature for executing the preliminary operation. At this time, the target temperature is set to be higher than the set temperature corresponding to the length of the management period. To calculate. Details will be described later.

Then, the on-timer operation control means 21 obtains a pre-operation period for the room temperature to be equal to the target temperature at the on-timer time t3 corresponding to the temperature difference between the room temperature and the set temperature at the determination time t1, and the on-timer time The preliminary operation start time is determined by subtracting the preliminary operation period from t3. Generally, if the temperature difference between the room temperature and the set temperature is large, the pre-operation period becomes long. Therefore, the pre-operation period can be obtained by obtaining this relationship experimentally.
Then, this preliminary operation start time t2 is set in the timer means 22 and waits. The timer means 22 outputs this time to the on-timer operation control means 21 when the preliminary operation start time t2 is reached. When this time is input, the on-timer operation control means 21 outputs an operation start instruction and the calculated target temperature to the control means 11 to start preliminary operation. At the same time, the on-timer operation control means 21 sets the on-timer time t3 in the timer means 22.

  The timer means 22 outputs the on-timer time t3 to the on-timer operation control means 21 at the on-timer time t3. When this on-timer time t3 is input, the on-timer operation control unit 21 outputs an operation stop instruction to the control unit 11 to stop the pre-operation and start the current-limited operation. In the current limiting operation, the air conditioner is air-conditioned with a consumption current equal to or lower than the predetermined current described above. In this embodiment, the current consumption in the blowing operation by an indoor fan (not shown) of the indoor unit 1 is changed to the air conditioning in the blowing operation. It is the value which added the error of the current fluctuation of the machine.

  For this reason, the current consumption during the management period in which the compressor is not operated is smaller than during the preliminary operation in which the compressor (not shown) in the outdoor unit is operated, and other electrical devices can be used without any trouble during this management period. it can. Further, when the on-timer time t3 is reached, the on-timer operation control means 21 sets the end time t4 of the management period (start time of normal operation) in the timer means 22. On the other hand, the room temperature at the on-timer time t3 is a target temperature higher than the set temperature, but the on-timer operation control means 21 stops the preliminary operation from this point and instructs the blowing operation (current limiting operation). The room temperature gradually decreases with time.

  When the management period end time t4 comes, the timer means 22 outputs the management period end time t4 to the on-timer operation control means 21. When this time is input, the on-timer operation control unit 21 outputs a set temperature value and an instruction to start the air conditioning operation to the control unit 11. This is because the target temperature value higher than the set temperature value is stored in the target temperature storage means 14 during the preliminary operation, and this is returned to the set temperature value. The control unit 11 stores the input set temperature value in the target temperature storage unit 14, starts normal heating operation based on the set temperature according to this temperature, and the current limit on-timer instruction unit 20 ends its own control.

  As described above, the on-timer operation control means 21 performs heating operation higher than the set temperature until the on-timer time t3, and thereafter performs only the air blowing operation during the management period, and uses the set temperature after the end of the management period. The control means 11 is instructed to resume the air conditioning operation. For this reason, during the management period, the current consumption of the air conditioner can be limited to a minimum, and other electrical products can be used. In addition, since the on-timer operation control means 21 performs the pre-operation so as not to become as low as the set temperature as much as possible, the user's discomfort can be reduced.

Next, details of each control means will be described.
First, a method for calculating the target temperature will be described. The on-timer operation control means 21 sets the room temperature at the on-timer time when starting the pre-operation to a target temperature higher than the set temperature in the heating operation mode and lower in the cooling operation mode. That is, in the management period in the heating operation mode, a target temperature higher than the set temperature is considered in consideration of a decrease in room temperature, and in the management period in the cooling operation mode, a target temperature lower than the set temperature is considered in consideration of an increase in room temperature, Each is calculated by the on-timer operation control means 21.

  The decrease in the room temperature after stopping the heating operation and the increase in the room temperature after stopping the cooling operation are mainly determined by the size of the room in which the air conditioner is installed, the heat insulation capacity, the outside temperature, and the like. Since the size of the room and the heat insulation capacity are determined at the place (house) where the air conditioner is installed, the present invention assumes a standard house and obtains a numerical value beforehand in advance as a room temperature change table. 5

  FIG. 3 (1) is a graph showing the room temperature decrease characteristic in the standard house described above, and FIG. 3 (2) is a graph showing the room temperature increase characteristic. The vertical axis of each graph is room temperature change (° C.), and the horizontal axis is time (minutes). In addition, X in the room temperature change indicates the room temperature when the operation is stopped, and a numerical value with a sign following this indicates a relative temperature change from X. Moreover, the graph in the case where two outside air temperatures differ by the solid line and the dotted line is shown.

For example, FIG. 3 (1) shows a temperature change for 60 minutes from the stop of the characteristics from when the heating operation is stopped until the room temperature is reduced to the outside temperature. Here, when the outside air temperature is 10 ° C. and 40 minutes have passed since the heating operation is stopped, the room temperature decrease is X−4 ° C. If the room temperature is 22 ° C. when the heating operation is stopped, 22 ° C.− 4 ° C. = 18 ° C. Accordingly, the room temperature is 22 ° C. at the time of the on-timer, and when the heating operation is stopped here, the room temperature when 40 minutes of the management period has elapsed from the on-timer time is lowered to 18 ° C.

  Conversely, if the management period is 40 minutes, a decrease of 4 ° C should be considered, so if the set temperature is 20 ° C, this temperature is set as the center value of the temperature change, and the room temperature is 22 ° C at the time of the on-timer. When the operation is stopped, the room temperature can be kept within the set temperature ± 2 ° C. during the management period even if the operation is stopped.

  The temperature change table in FIG. 4 is a numerical value stored from the graph in FIG. The items in the horizontal direction are the management period (minutes) and the room temperature change value (° C). The room temperature change value is divided into items at the time of heating operation / cooling operation, and the item at the time of heating operation is 0 ° C outside temperature. The items at the time of cooling operation are divided into 10 ° C. and the outside air temperature are 30 ° C. and 40 ° C., respectively. Then, 0 to 60 minutes are divided in 10 minute increments in the vertical direction of the management period, and each temperature change value (room temperature change value) is stored. In the management period column, 0 minutes indicates X (operation stop point) in FIG. Furthermore, when it is desired to specify the management period and the outside air temperature in detail, the data of the temperature change table may be made fine, or may be interpolated by calculation from the data of each adjacent item. Moreover, it is good also as a numerical formula which calculates | requires a room temperature change value instead of a temperature change table.

  The on-timer operation control means 21 refers to the operation mode and selects the item of heating operation / cooling operation in the temperature change table. When the outside air temperature obtained at the determination time t1 is 10 ° C. in the 40-minute column designated in the management period, 4 ° C., which is data when the outside air temperature is 10 ° C., is extracted. In this embodiment, in order to compensate for this temperature drop, 2 ° C., which is half of 4 ° C., is added to the set temperature of 20 ° C. to calculate the target temperature of 22 ° C.

In other words, in this example,
Target temperature value = set temperature value + room temperature change value / 2 Equation 1
It is defined as
The on-timer operation control unit 21 may output the calculated target temperature value to the target temperature storage unit 14 in the control unit 11 as it is, but in this embodiment, as described later, the result of executing the on-timer operation As shown in FIG. 2, the corrected target temperature calculation means 26 corrects the target temperature based on the room temperature. This will be described in detail later.

  The target temperature storage means 14 in the control means 11 stores the target temperature of the previous operation, and the set temperature value is stored in the target temperature storage means 14 unless the previous operation is an on-timer operation. Therefore, in the case of on-timer operation, the control unit 11 stores the target temperature calculated by the on-timer operation control unit 21, in this example, 22 ° C., in the target temperature storage unit 14, and the control unit 11 performs air conditioning according to the stored temperature. Run the operation. Then, when the management period ends, the on-timer operation control unit 21 stores the set temperature value in the target temperature storage unit 14. Therefore, after the management period ends, the control means 11 performs a normal air conditioning operation based on the set temperature value.

  Next, a case where the target temperature is corrected using the corrected target temperature calculation means 26 will be described. In FIG. 5, when the room temperature decreases to 4 ° C. or more, for example, as indicated by the dotted line, at a time t4 when the management period ends, the room is larger than the standard room or the room as described above. In order to offset this, the target temperature needs to be further increased in the next on-timer operation.

Therefore, the on-timer operation control unit 21 outputs the room temperature value at the time t4 when the management period ends, the set temperature value, and the room temperature change value extracted at the determination time t1 to the corrected target temperature calculation unit 26. The corrected target temperature calculating means 26 calculates and stores the corrected temperature using the following formula 3. Then, the corrected target temperature calculation means 26 calculates the corrected target temperature using the following equation 2 at the time t1 in the next on-timer operation.
Target temperature value = set temperature value + (room temperature change value + corrected temperature value) / 2 Equation 2
Corrected temperature value = Set temperature value-Room temperature change value-2-Room temperature

  In the case of FIG. 5, the corrected target temperature calculation means 26 uses the equation 3 at the time point t4, and sets corrected temperature value = set temperature value (20 ° C.) − Room temperature change value (4 ° C.) / 2-17 ° C. = 1 ° C. calculate. Then, at the time of t1 in the next on-timer operation, the next target temperature value = set temperature value (20 ° C.) + (Room temperature change value (4 ° C.) + Corrected temperature value (1 ° C.)) / 2 = 22.5 ° C is calculated.

  At the time t1 in the first on-timer operation, the room temperature value at the time t4 when the management period ends is unknown, so the corrected target temperature calculation means 26 is changed from the on-timer operation control means 21 to the time t4. When the room temperature value is not given, the correction temperature value is calculated as 0 ° C. Further, when the operation mode, the management period, and the set temperature are changed, the correction temperature value = 0 ° C. is calculated. Alternatively, the corrected temperature value may be stored as a history, and the target temperature value may be calculated using this average value.

In the case of the cooling operation mode, it is the opposite way of thinking,
Target temperature value = set temperature value-(room temperature change value + corrected temperature value) / 2
Correction temperature value = room temperature value− (set temperature value + room temperature change value / 2)...
It becomes.
The corrected target temperature calculating means 26 stores the corrected temperature value, and calculates the target temperature value using this corrected temperature in the next on-timer operation.

  As described above, the air-conditioning operation that uses the room temperature change value to limit the current during the management period in order to execute the preliminary operation, for example, higher than the set temperature in the heating operation and lower than the set temperature in the cooling operation. Even if is executed, the user's discomfort can be reduced because the difference between the room temperature and the set temperature is smaller than when the preliminary operation is executed using the set temperature.

  In addition, since the corrected target temperature calculation means 26 calculates the correction temperature and corrects the next target temperature, the difference between the room temperature and the set temperature in the management period can be reduced as compared with the case where the correction is not performed. Pleasure can be reduced.

  Next, the operation of the on-timer operation control means 21 will be described using the flowchart of FIG. In FIG. 6, ST represents a step, and the number following this represents a step number. Further, “Y” in FIG. 6 indicates Yes, and “N” indicates No. As a precondition, the outdoor unit 2 is in a stopped state, and the indoor unit 1 is also in a stopped state. Further, it is assumed that the operation mode and the set temperature value are already stored in the control means 11.

  The on-timer operation control unit 21 confirms whether the on-timer time by the on-timer time input unit 24 and the management period by the management period input unit 25 are input (ST1). When the on-timer time and the management period are not input (ST1-N), the process jumps to ST1.

  When the on-timer time and the management period are input (ST1-Y), the on-timer time and the management period are extracted from the respective means (ST2). Next, a judgment time, which is a time obtained by subtracting a predetermined time (one hour) from the on-timer time, is output to the timer means 22, and it is confirmed from the time outputted from the timer means 22 whether the current time is the judgment time ( ST3). If the current time is not the determination time (ST3-N), the process jumps to ST3.

  When the current time is the determination time (ST3-Y), the operation mode, the outside air temperature value, and the set temperature value are extracted from the control means 11 (ST4). The room temperature change value corresponding to the operation mode, the outside air temperature value, and the management period is extracted from the room temperature change table (ST5). Next, the set temperature value and the room temperature change value are output to the corrected target temperature calculation means 26, an instruction for calculating the target temperature value is output, and the target temperature value of the calculation result is input. (ST6). Then, a preliminary operation start time corresponding to the input target temperature value is calculated (ST7).

  The preliminary operation start time is output to the timer means 22, and it is confirmed from the time output from the timer means 22 whether the current time is the preliminary operation start time (ST8). If the current time is not the preliminary operation start time (ST8-N), the process jumps to ST8. When the current time is the preliminary operation start time (ST8-Y), the target temperature value and the operation start instruction are output to the control means 11 to start the preliminary operation (ST9).

  The on-timer time is output to the timer means 22, and it is confirmed from the time output from the timer means 22 whether the current time has become the on-timer time (ST10). If the current time is not the on-timer time (ST10-N), the process jumps to ST10. When the current time is the on-timer time (ST10-Y), an instruction is output to the control means 11 to stop the operation of the outdoor unit 2 and start the air blowing operation of the indoor unit 1 (ST11).

  The management period end time obtained by adding the management period to the on-timer time is output to the timer means 22, and it is confirmed from the time output from the timer means 22 whether the current time becomes the management period end time (ST12). If the current time is not the management period end time (ST12-N), the process jumps to ST12. When the current time is the management period end time (ST12-Y), the room temperature value, the set temperature value, and the room temperature change value are output to the corrected target temperature calculation means 26 to be used in the next on-timer operation. An instruction is given to calculate and store the value (ST13).

  The set temperature value and the operation start instruction are output as the target temperature values to the control means 11 to start normal operation (ST14), and the on-timer operation control means 21 is ended.

  In this embodiment, the target temperature is determined so that the center of the room temperature change range becomes the set temperature, but is not limited thereto, for example, in the heating operation, the target temperature value is set to the set temperature value + room temperature change value, In the cooling operation, the target temperature value may be set temperature value-room temperature change value.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Outdoor unit 3 Communication line 4 Room temperature detection part 5 Memory | storage part 6 Remote control 7 Timer 8 Control part 11 Control means 14 Target temperature memory | storage means 20 Current limit on timer instruction | indication means 21 On-timer operation control means 22 Timer means 23 Room temperature change Table 24 On-timer time input means 25 Management period input means 26 Corrected target temperature calculation means 101 Control means 102 Room temperature input means

Claims (2)

A preset temperature, an on-timer time, and a management period that is a period following the on-timer time are stored in advance, and air conditioning is performed so that the room temperature becomes a target temperature based on the preset temperature by the on-timer time. An air conditioner that performs pre-operation,
The air conditioner executes the preliminary operation by setting the target temperature higher than the set temperature if the preliminary operation is a heating operation, and lowering the target temperature below the set temperature if the preliminary operation is a cooling operation. The air conditioner performs a current limiting operation that operates at a predetermined current or less during the management period. The air conditioner includes a current limit on-timer instruction means for outputting the target temperature and an instruction for the current limit operation to the control unit,
In the current limit on-timer instruction means, a room temperature change table in which a room temperature change value that is a change in room temperature and the room temperature in the management period is experimentally obtained in advance, or the length of the management period and the management period An arithmetic expression for obtaining a room temperature change value that is a change in room temperature is stored,
The current limit on-timer instruction means obtains a room temperature change value in the management period from the room temperature change table or the arithmetic expression using the length of the management period, and corrects the set temperature with the room temperature change value. The air conditioner according to claim 1, wherein the preliminary operation is executed by outputting a value of a target temperature to the control means.

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